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Home My WebLink AboutDSHW-2024-005362.3 SIS DSHWTN 1994 40469 U S Enviroj^M^rProtectidniAqencv Office o^^Hprograms Enforcement ContraiiiiiiB-wg-ooog I f I I i i TES 12 Technical Eijj|»sement Support at Hazardi^lBvaste Sites Zone iVi Reg ioiiMgyg, and 10 PRC Environmental Management, Inc CHEVRON REFINERY SALT LAKE CITY, UTAH RCRA-COMPREHENSIVE GROUNDWATER MONITORING EVALUATION FINAL PHASE I REPORT CHEVRON REFINERY SALT LAKE CITY, UTAH RCRA-COMPREHENSIVE GROUNDWATER MONITORING EVALUATION FINAL PHASE I REPORT Pr^ared for U.S. ENVIRONMENTAL PROTECTION AGENCY Region 8 Denver, Colorado 80202 Work Assignment No EPA Region Site No. Date Pr^ared Contract No. PRC No Pr^ared by Tel^hone No EPA Primary Contact TeIq>bone No R080S6 8 UTD092029768 February 24, 1994 68-W9-0009 312-R08056 PRC Environmental Management, Inc. (Lorraue Alcott, Barbara DeAngdis) (303)295-1101 Nina Churchman (303) 293-1666 CONTENTS Section fag£ EXECUTIVE SUMMARY ES-1 1 0 INTRODUCnON 1 2 0 BACKGROUND 1 3 0 HYDROGEOLOGY AND CHARACTERIZATION OF UPPERMOST AQUIFER 10 3 1 HYDROGEOLOGIC INVESTIGATION METHODS USED BY CHEVRON ... 10 3 2 SUMMARY OF FACILITY GEOLOGIC AND HYDROGEOLOGIC CHARACTERIZATION 14 3 2 1 Geology 14 3 2 2 Hydrogeology 16 3.2 2 1 Deep Confined and Unconfined Aquifer 18 3 2 22 Shallow Aquifer 19 3 3 GROUNDWATER FLOW SYSTEM 20 3 3 1 De^ Aquifer 20 3 3 2 Shallow Aquifer . . 24 3 4 ADEQUACY OF FACILITY'S HYDROGEOLOGIC ASSESSMENT . . 29 1 0 MONITORING WELL SYSTEM DESIGN AND CONSTRUCTION 30 4 1 MONITORING WELL SYSTEM DESIGN 31 4 2 MONITORING WELL CONSTRUCTION DATA 32 5 0 GROUNDWATER MONITORING PROGRAM 39 6 0 SURFACE AND GROUNDWATER QUALITY EVALUATION 40 6 1 SHALLOW MONITORING WELLS 46 6 11 Orgamcs 47 6 1 2 Metals 58 6 1 3 Other Parameters 58 6 2 DEEP MONITORING WELLS 59 6 2 1 Orgamcs . . . . . 59 6 2 2 Metals . . .... 60 6 2 3 Other Parameters .. . . 60 CONTENTS, (Continued) SssSkm £ags 6 3 NORTH TANK FARM 62 6.3 1 April 1990 San^lmg Evoit 62 6 3.2 December 1990/January 1991 Sanq>lmg Event 64 6 4 OIL DRAIN 66 6 5 SUMMARY OF ANALYTICAL RESULTS 67 7.0 SUMMARY AND CONCLUSIONS 69 8 0 REFERENCES 71 Attachment 1 Responsiveness Summary Appendices A CME CHECKUST B BORELOGS, WELL CONSTRUCnON DATA, AQUIFER TEST RESULTS C ANALYTICAL DATA D MARKETING TERMINAL il IB. 3U-MIQSeWkwNaWiatXB*\3-34.M\ifcr EXECUTIVE SUMMARY PRC Environmental Managonent, Inc (PRC) coiiq>leted a oomprdiensive monitonng evaluation (CME) of the Resource Conservation and Recovery Act (RCRA) groundwater momtormg system at the Chevron U S A. Inc Salt Lake Refinery (Chevron) The objective of a CME is to determme if an owner or operator has a groundwater momtormg system in place and if this system is adequately designed, constructed, operated, and mamtamed This CME has been divided mto two phases Phase I is an office evaluation of all available repoits and documentation on die £acdity*8 existing groundwater momtormg system Phase II will be a fidd audit of Chevron's samplmg procedures and will mclude the collection and analysis of split groundwater samples This repott presents die findings of the Phase I mvestigation Tlie Chevron refinery is located near Salt Lake City, Utah Two Chevron affiliates - Chevron USA Inc Salt Lake City Tenmnal (Marketmg) and Chevron Pipelme Co (Pipdme) - are located the southeastern and northeastern boundaries of the refin^ propoty, respectively They are s^arate compames with s^arate EPA ID numbers Refinery activities occupy q>proximately 200 of die facility's 600 acres Forty-eight solid waste management umts (SWMUs) and six RCRA-reguIated umts have been identified at the refinery The six RCRA^^lated umts are the Reservoir, Baffle Board Pond, Storm Surge Pond, Tetraediyl Lead (TEL) Weathermg Area, Amencan Petroleum Institute (API) Sq>arator Sludge Pit, and Hazardous Waste Landfill All six of these regulated umts are currendy undergomg closure Chevron's consultants have conducted a variety of subsurface investigations to investigate die hydrogeology of the Chevron refinery by installmg approximately 172 sod bonngs, 80 monitonng wells and 96 piezometers These subsurface investigations have allowed Chevron to adequately characterize the subsurface lithology and aquifers underneath its property A deep unconfined aquifer IS present between die refinery and the foot of die Wasatch Mountains A deep confined aquifer and the shallow unconfined aquifer are present underneath the refinery itself Hie confiiung layer between die shallow and deep confined aquifer ranges in d^di from 1-fbot to greato- dian 100 feet The groundwater momtormg system at the Chevron refinery is designed to momtor the facdity as a whole and is not designed to detect individual releases from die six RCRA regulated umts The current groundwater momtormg system consists of 80 momtormg wells, 60 shallow and 20 deep Over the past 13 years. Chevron has instituted a groundwater monitonng program and consistendy ES-1 KB- 3lMI0taS6WbnnBVrainn.cae\»'33-M\ifa sampled the groundwater m eight shallow and seven deep monitoring wdls witfam die refinery Groundwater samples have been collected at these 15 monitoring wells semi-annually over the past 10 years The analytical results indicate diat die refinery (^>a:ations have affected die shallow groundwater Elevated levels of orgamcs and metals have been consistendy detected m momtormg wells S-2, S-IO, and S-11. Groundwater samples of die deep aquifer have only detected sporadic and low concentrations of some organics and metals Groundwater samples from the shallow momtormg wells m the North Tank Farm (NTF) area of die refinery have contamed benzene, toluene, ediylbenzcme, and xylene (BTEX), total petroleum hydrocarbon (TPH) components, and free phase hydrocarbons Analysis of groundwatCT sampies from the deq> aquifer boieath die NTF has not detected the presence of any contamination Some construction mfbrmation b available for the 80 momtoring wdls The information available mdicates that the momtormg wells have been adequately constructed and are citable of momtormg both the shallow and de^ aquifer beneath the refinery All 80 of die refinery momtormg wdls were redeveloped durmg the sprmg of 1992 and are currendy open and avaUable for future saii^>lmg activities Several aspects of the Chevron property hydrogeology stdl need further danflcation One is to confirm the presence of the confiiung layer between die shallow and deep aquifer beneath die NTF area Additional deep momtormg wells should be constructed m the NTF area Also, die general conclusion that all shallow groundwater m die refinery is mtercqited by die Od Dram should be further evaluated This CME makes specific recommendations for groundwatw samplmg and measurement of water levels near this surfue canal Collection of these samples and measurraients during the upcommg field audit will hdp clanfy whether all die shallow groundwater flowmg away from the refinery is captured before it readies die Jordan River west of die refinery £S-2 KB. 313«iaaiAcfaMna\rwranA»\»23-M\ifa' 1.0 INTRODUCTION PRC Envuvnmental Managemmt, Inc (PRC) has oovaplebed a comprehensive momtormg evaluation (CME) of die Resource Conservation and Recovery Act (RCRA) groundwater moiutoring system at the Chevron Refinery (Chevron) The refinery is located in Salt Lake City, Utah. This CME was prepared for the U S Envuronmental Protection Agency (EPA) Region 8. The objective of a CME is to determine if an owner or operator has a groundwater momtormg system m place and if dus system is adequatdy designed, constructed, opented and maintained This monitonng system should detect rdeases and define the rate and extent of contamination caused by RCRA-regulated hazardous waste management uiuts as requved by Tide 40 Code of Feiersi Regulations (40 CFR) Parts 265 and 270 There are su RCRA-regulated umts widim die Chevron refinery property The purpose of this CME is also to evaluate groundwater corrective action voider RCRA 40 CFR, Subpart F. 2.0 BACKGROUND Chevron USA operates die Salt Lake Refin^ near Salt Lake City, Utah figure 1) Chevron owns i^proxunately 600 acres m this area, but reRnecy activities occupy only 200 acres Production of gasolme, stove oil, diesd, furnace oil, and light residual fud oil began at die refinery on December 1, 1948 The production capabilities of the refinery have expanded smce diat time Currently, the refinery manufacture jet fuel, aviation gas, gasolme, stove od, diesel fuel, industrial fuel oil, propane, coke, and log wax. In April 1991, a Corrective Action Order (CAO) was issued to the refinery whidi superseded the May 1984 compliance order This CAO identified several additional solid waste managemoit umts (SWMUs), brmgmg die totid number of SWMUs to 48 The additional SWMUs v/ete identified based on die final RCRA FacUity Assessment (RFA) report completed m April 1989 (State of Utah 1991) Table 1 summarizes each SWMU's operational history as wdl as its status Six of die SWMUs are designated RCRA-regulated units according to the CAO Hiese umts are die Tetraediyl Lead (TEL) Weadiermg Area, American Petix>leum Institute (API) Separator Sludge Pit, Reservoir, Baffle Board Pond, Storm Surge Pond, and Hazardous Waste Landfill All six of diese umts are undergomg closure In addition, the landfarm and landfarm storage area are also bemg closed Figure 2 illustrates the locations of the SWMUs Table 2 summarizes die types of regulated wastes formerly handled at the six RCRA regulated units 1 «B. 31>ltOIOS6\ckm«aWiauM\3-2M«\tkr t^orthf Si\ 'J V5-V. \ I. / 5- I'' UJ ^ WWl* CHEVRONU'SA WW-1 • PRODUCTS COMPANY II V ROnNERY I * SI \' K I SiptiMi •••» I •ir c C9r SALT LAKEj WW-2 • Ibdio Towtrs A N Be ks , (»M "-- 14 I AT] BDT AtlOKAL. (5) I w • • •* \* \ - WW-3* 1^ V •13* as CO SOURCE EARTHFAX, 1992 CHEVRON REFINERY SALT LAKE CITY. UTAH FIGURE 1 LOCATION MAP iVIC ENVIRONMENTAL MANAGEMENT, INC TABLE 1 CHEVRON CME OPERATIONAL HISTORY OF SOLID WASTE MANAGl NT UNITS Nmnbcr Nuae A bermed unhned suiftoe mpoundment used to store inter- mediate heavy oils bom the crude unit This unit was also used for additional surge capacity firom wastewater treatment system mckA^ 1 mm 1 Retervoir A bermed unhned suiftoe mpoundment used to store inter- mediate heavy oils bom the crude unit This unit was also used for additional surge capacity firom wastewater treatment system 1949 - 19S2 Closure m progress Waste oil was removed m 1983 Y LandnU An 2 SoLd Wute LandfiU This iinlined landfill received HOC caUlyst, catalyst fines, sulfiir plant catalysts, alumina, unused jet fuel filters, refuse, and oonstniction debns Late 1960s- 1988 Closure planned N 3 Hazardous Waste LandfiU This unlined landfill received asbestos, empty dye additive barrels, tank cleanmg residues, cleaned heat exchanger bundles, one barrel coobng tower, and blowdown chemicals Nov 1980-May 1982 Closure m progress Y 4 Oil Band Storage Area Used for temporary storage of drums oontainmg hazardous waste 1980 - 1984 Inactive N 5 Standing Water/Surface Impoundment Impoundment collects runoff from landfill area Eariy 1980s- present Operatmg N 6 Oily Dump This impoundment area was used as a disposal area for sludge fiom suUiinc acid gaa-oil treatmg plant Also used as general refinery dump site 1953 -1960 1960s - 1980 Inactive, partially covered with native soils Closure planned N 7 TetraeUiyl Lead Weathermg Area Area was used for weathering of bottom solids firom tanks stomg hydrocarbon products oootanung TEL Bariy 1970s- 1982 Closure m progress Y 8 Landfarm Storage Area A storage area for oily wastes generated durmg winter mondis Nov 1980-May 1982 Closure plan ^iproved N 9 Landfarm Landfimned oily waste 1979 - 5/82 Cuirently till and fertihzc land&rm durmg warm weather Closure planned N ltB.31Ut0aa9fit<b«i«B\>weB*\SWMUl *ia-3M4Vadtf TABLE 1 (Continued) CHEVRON CME OPERATIONAL HISTORY OF SOLID WASTE MANAGEMENT UNITS Number Name Opcra^n ItoMtflrame Statu itcitA« it^pdated vm 10 Alkyl Channel Unlined iurfaoe impoundment used to oonv^ wastewater to oil dram Abandoned lime settbng pond Convqred alkyl cfBuent to baffle board pond 1950-1965 1959 -1980 1980 - 1984 Closure planned N 11 Spent Caustic Evaporation Site Unlined impoundments used for disposal of spent caustic Eariy 1970s - nud-1980 Cfosure planned N Alky Site Used as general refinery dump site and then covered and used as evaporation surface tmpoundment for alkylation plant 1950s - 1980 Closure planned N 13 Northeast Landfill Area used for disposal of spent FCC and HCC catalyst, bncks, trash, and asphalt Eariy 1960s- 1980 Inactive, oovered and vegetated Ckis re planned N 14 Leaded Tank Sludge Disposal Sites Leaded tank sludges were placed in ground depressions, allowed to weather, and then covered 1950 - 1975 In 1983 leaded tank sludge and contaminated sod were excavated Closure planned N 15 Conveyance Ditches The ditches were a series of open, unlined ditches that conveyed water from the tank field areas to die wastewater treatment &cility 1948 - 1983 Ditches ekiaed and excavated and rq>laoed by pipmg system m 1983 Closure planned N 16 Standmg Water Site Thu area is a dq>reasion where storm water occasionally accumulates 1950s • present Operatmg Closure planned N 17 API Separator Sludge Pit This unlined sur&ce impoundment was used for temporary storage of API sqiarator sludge 1948-1984 Sludge excavated m 1984 Closure plan approved Y Storm Surge Pond An unlined surface mipoundment used for temporaiy storage of excess wastewater 1970-present. Rarely used smce 1983 Ctosureplan approved Y lkBJlMKNDSach»mB\nvaB»\SWMUl *I\3-2VMW TABLE 1 (Continued) CHEVRON CME OPERATIONAL HISTORY OF SOLID WASTE MANAGEMENT VNTTS Number Naw . OpcraiiiMi Tkuetnme Statai RCRA- Kcgidated BafQe Board Pond An unlined surface mipoundment received effluent fiom API separator for additional oil sqwration and effluent finm the HP acid neutralization pit 1950s. 1983 CurreoUy used for vvastewater suites thftt catoeed the storm surge pond Closure planned Y Wastewater 20 Treatment System API Sqjarators Oil/water separation unit 1948-present Operatmg N 21 Induced Air Flotation Unit Conducts additional oilAviter aeration Mid-1970B - present Operating N 22 Storm water Segregation Sump Used to culture and separate oil fiom storm water fknvs 1984 - present Operating N 23 No 1 Pond An unlmed surface impoundinent used for biological degradation oxidation of wastewater 1965 • present Operatmg N 24 BIO-DISCS Encfosed system used to fitither biological degradation Mid-1970s - present Operating N 25 No 2 Pond A bermed and unlined retention pond to foither polish the wastewater 1965 - present Operatmg N 26 No 3 Pond See above 1965-present Opmtmg N 27 No 4 Pond See above 1965-present Operatmg N 28 Sand Filter An abovegrade steel tank used to reduce suspended solids Mid-1970s - present Operatmg N i 29 Sand Filter Backwash Pond A bermed unlmed impoundment used to collect badcwash fiom cleanmg the sand filter Mid-1970s - present Opentmg N 30 Pond No 5 A bermed unlmed surface tmpoundment used as the final retention pond 1965-present Operatmg N 31 HP Acid Neutralization Tank Two adjacent subgiade, open- topped cells used to neutralize spent HF acid and water mixture and "merox caustic " 1967-present Operating N 32 Spent Caustic Tanks Two aboveground tanks used for storage of spent caustic 1950s - 1985 1985-present Operatmg but caustic stored for less than 90 days N R&SlMtOaaSAdhnmWaMVSWMUl WMi*t^ TABLE 1 (Continued) CHEVRON CME OPERATIONAL HISTORY OF SOLID WACTE MANAGEMENT UNITS OperaiiiMi timttrmme fwBrW a^gdlatcd i LuneSettlmg Basm An unlined, subgrade surfue impoundmeat that reoenes effluent from boiler plant and HF acid neutralization tank 1980-present Operating N 34 Cokes Fmes Dewatenng Impoundment and Waste Pile Area A surface mqwundment uaed to settle coke fines from water used to drill out and crumble solid coke for kiadmg mto railroad cars 1972-1979 Remeduted 1987 inactive, soil caccavated, and regraded N 35 Hazardous Waste Intenm Storage Pad Concrete pad used to temporarily store wastes 1983 - present Operating N 36 Bundle Cleanmg Pad Concrete pad used to clean heat exchanges Eaity 1980s- present Operating N 3, Shale Oil Semi-Woiks Storm Water Retention Pond This surftce impoundment wis used to collect storm water lunofT bom the Shale Oil Semi-Woiks fiicihty 1984 -1985 Remeduted mid- 1980s Facility has been dismantlrd and soil cauavated fitom pond N 38 Shale Oil Semi-Works Spent Shale Pile This waste pile was used to store spent shale generated m the shale oil opmtion 1984 -1985 Remediated mid- 19808 Plies are capped and surrounded by a slurry wall N 39 No 2 0utfaU System Channel (Similar to #33—Lune Settlmg Basm) The channel was used to oomey effluent firom the lime aettling basm to the NPDES No 2 Out- fall The channd was also once part of the WWTP discharge channeb 1948-1984 Closure planned N 40 Experimental Farm An open fieM where wastewater was used to irrigate oat and barley fields 1973 • 1985 Inactive N 41 Bonneville Canal A 2,400-foot canal that runs across the refinery m an east-west direction Canal now used to dram sprmgs and seeps near Chevron's eastern border Eariy 1990s- present Operatmg N 42 Baffle Board Pond Convey- ance Ditch An unlmed, open channel used to convey overflow fiom Baffle Board Pond back to API Mid-1950s - 1983 Inactive N a&31MUSCSAahm«B\fOT(M\SWMUl «n2-2M<\^ TABLE 1 (Continued) CHEVRON CME OPERATIONAL mSTORY OF SOLID WASTE MANAGEMENT UNITS Number Naase Optra^M Ttmtbmm aaras RCRA- l?iiit N 43 Abandosed LimeSelthng Basm Surftce impoundment used to contain boiler treatment water 1959 - 1980 Abandoned RCRA- l?iiit N 1 ** Lime Settlmg Basin Dewatermg Impoundment A basm where sludges drained from the lime settlmg basm are dned 1980-present Operating N 45 Fire Trammg Area Surface Impoundment A small lagoon which contained unknown wastes 1973 -1985 In 1985 lagoon was oovoed with gravel for fire trammg area N Raikar Loadmg Area Sump and Tank A concrete Imed spill collection system and subgrade pump for log wax ? - present Oprrsting N 47 Bio-Disc Sump A low area between the bio-disc unit and oil dram where water collects ? -present Operatmg N 48 North Tank Farm 60 tank storage area for erode and refined petroleum products 1950s - present Operating N i&3i2«oaoiaciH S 8 I ALKY NO 2 OUTTAU. BIO-DISC'SUUP CHANNEL SYSTEM ntE UUE SETTUNG BASIN TRAILING AND OE-WATERING lUPOUSDUENT lUPOUNDMENT AREA • CURRENT WASTE MANAGEMENT UNIT SOURCE EARTHFAX 1991b 250 0 2S0 SCALE 1" = 500 500 CHEVRON REFINERY SALT LAKE CITY UTAH FIGURE 2 SOLID WASTE MANAGEMENT UNITS ENVIRONMENTAL MANAGEMENT INC TABLE 2 CHEVRON CME SUMMARY OF REGULATED WACTES SWMU Waste Code DescripHen Reservoir K051* Primary oil/solid/wato' separator sludge Hazardous Waste Landfill D007 Coolmg Vov/ec chomcal contamed elevated levds of chromiiun TEL Weathermg Area K052 Leaded Tank Bottoms API Separator Sludge Pit K051 Prunary od/sohd/water separator sludge and API separator sludge from tfie petroleum industry Storm Surge Pond K051* Prunary oil/solid/water separator sludge Baffle Board Pond K051* Prunary oil/solid/water s^arator sludge *These wastes are hazardous based on the defimtion of K051 contamed m the Utah Hazardous Waste Management Rules that were m effect when the Corrective Action Order was issued on April 5, 1991 RE. ^l^liOS0S6\Ghmm\mwnw\SWMU^.(U\2-2}44\IIlkf 3 0 HYDROGEOLOGY AND CHARACTERIZATION OF UPPERMOST AQUIFER The followmg subsections review the hydrogeologic mvestigation methods used by Chevron, summarize the facility's hydrogeologic settmg, and discuss the adequacy of the mformation presented by Chevron 3 1 HYDROGEOLOGIC INVESIIGATION METHODS USED BY CHEVRON Chevron refinery began drillmg sod bormgs on its property in 1948 B^een 1949 and 1983, 91 sod bormgs were completed These bormgs were drilled primarUy for geotechmcal purposes for refinery construction mvestigations These early mvestigations are summarized m Table A-2 of the Groundwater Quality Assessment RqM)rt (GWQAR) (Dames & Moore 198Sa) and wdl not be reiterated here Chevron began investigatmg the hydrogeology of its facdity m 1979 The early study consisted of a literature search and summary of the avadable hydrogeologic information (Dames & Moore 1980) Smce the completion of this r^rt m 1980, Chevron has conducted numerous hydrogeologic mvestigations on its property Since i980, Chevron has completed six separate drdlmg programs to characterize the subsurface environment of the property These mvestigations were conducted by either Dames & Moore or Ear J^ax Engmeermg (EarthFax) Table 3 summarizes these mvestigations The refinery has completed approxunately 172 soil borings, and mstalled 80 momtormg wells and 96 piezometers The refmery momtormg well locations are shown m Figure 3 and those at the NTF (SWMU 48) are shown in Figure 4 The depths drdled range from 8 to 120 feet The method used to drdl the boreholes was contmuous cormg by hollow stem auger Characterization of the principal lithologic umts underlymg the Chevron facdity was completed by examinmg and logging cores and split spoon samples Some sod samples were also analyzed for physical properties, mcludmg gram size analysis, permeabdity tests, and moisture/density tests Borehole geophysical mvestigations, mcludmg natural gamma, gamma-gamma density, caliper, resistivity, and neutron logging were completed m the refinery area All avadable borehole logs and momtormg well completion information is presented m Appendix B 10 >E- 312-miQS6\<fawnB\t«vieim.ciM\3-2344\itr TABLES CHEVRON CME SUMMARY OF SUBSURFACE INVESTIGATIONS Invtstigatknt 1 1 J I 1 if ll II II iSil Early Refinery Investigations 1948 - 1983 91 Phase n Hydrogeologic Study 1981 20 18 11 SH 7D Yes Yes Yes Yes Yes Yes 1 Groundwater Assessment Plan 1984 33 33 29 SH 4D 3 Yes Yes Yee Yes Unknown Investigation Refinery 16 16 8SH 8D North Tank Farm 1990 3 3SH 23 3 Yes Yes Yes Yes North Tank Farm ''all 1990 7 7 6SH ID 70 10 Yes Yes Yes Yes Unknown Investigations North Tank Farm 3 3 Notes SH Shallow RE Replacement D Deep 11 ltB.313-RfltQSeVCkevrai\SWMU3 <bI\3-23-94\iiikf OATE12/tQS3 JLH DN FILE NAME 31?»»058\TnLE DRW S-26 D-1A S-27O °s-25 D-»00 SOURCE EARTHFAX, 1993 LCGCNO S-l O SHALLOW UOHITOR WELL D-l • OCCP MONITOR W(IL Cr-I O SHALLOW CARTHFiX UONirOR WCLL cr-zo oicr t«*ri<rAj( UOHITOR wca JSO I 700 _J SCALE CHEVRON REFINERY SALT LAKE CITY UTAH FIGURE 3 LOCATION OF GROUNDWATER MONITORING WELLS ENVIRONMENTAL MANAGEMENT INC S-6 O o in CO m o CO o CM < z S-9 O X -J -3 ro CO < D-1A (_) w. i ^ f S-4A 0-4' n—I D-35 s S-35 JUL ^O j)_3 Ef-50SA OEF-50SC EF-5 S-15 JL tF-l® S-8 Us-14 EF-6 O 00 ®0 EF-2 EF-20 • O EF-4 EF-3 _il S-17 O S-16 O n^rSGOA&D- SODB s_5 LCCtND S-t O SHALLOW UOHITOR WtLL D-l • DEEP MONITOR WELL Cr-I O SHALLOW CARTHFJIX MONITOR WCU tr-2D • DEEP EMInrM MONITOR WELL SOURCE EARTHFAX, 1993 CHEVRON REFINERY SALT LAKE CITY, UTAH FIGURE 4 CHEVRON NORTH TANKS FARM MONITORING WELLS #WIC ENVIRONMENTAL MANAGEMENT, INC 13 Hydrologic properties of the litbologic units underlying tbe Chevron facility have also been uivestigated In 1981, hydrologic tests were conducted in monitoring wdls at the refinery These tests included single monitoring well slug withdrawal tests and smgle and multiple momtormg well aquifer pumpmg tests (Dames & Moore 1982) Additional hydrologic testmg was conducted at the refinery m 1984 (Dames & Moore 198Sa) mcludmg 10 slug withdrawal tests and 21 specific capacity tests In 1990, both slug mjection and withdrawal tests were performed at the NTF (EarthFax 1990, 1991a) Table 3 also summarizes the hydrologic tests performed 3 2 SUMMARY OF FACILITY GEOLOGIC AND HYDROGEOLOGIC CHARACTERIZATION Several documents have been generated by Chevron's contractors to explam the hydrogeology of the facility The most pertinent documents mclude the Phase II Hydrogeologic and RCRA-Permittmg Studies, (Dames & Moore 1982), GWQAR (Dames & Moore 198Sa), and North Tank Farm Hydrogeologic Reconnaissance (EarthFax 1990) The followmg sections summarize the geology, hydrogeologic properties of the principal lithologic umts, and the characteristics of the local groundwater flow system in the Chevron facility area as described m these reports 3 2 1 Geology The Chevron facility is located m the Jordan Valley approximately 1,000 feet west of the Wasatch Front, inunediately north of Salt Lake City An extension of the Wasatch Front known as the Salt Lake Salient extends mto the Jordan Valley almost due east of the Chevron property (Figure 5) The proximity of this salient to the Chevron property has played a critical role m the shallow subsurface deposition (EarthFax 1990) To the north and south of the facility, m Salt Lake and Davis counties, alluvial fans have played a critical role m shallow subsurface d^sition However, the ste^ mountain front and dramage control of the salient resulted m no alluvial fans d^sition west of the salient, mcludmg the Chevron property area (EarthFax 1990) The Chevron property is underlain by a great thickness of unconsolidated and semiconsolidated lacustrine and alluvial sedunents ranging m age from Holocene (recent) to early Tertiary These sediments were tbe erosion products of rocks m the adjacent mountains and accumulated m depressions resulting from the relative uplift of the surrounding mountams durmg the Cenozoic period The thickness of the unconsolidated to semiconsolidated sediments near the facility is 14 RB. 31MtOIOS6\c)Mrna\imKim.cBe\2-23^\ifcr CD Q CO r LU CO ID O 00 o a: / CN LJ < ro CJ) BASE MAP USGS 1 100 000 SERIES MAP ENTITLED •SALT LAKE CITY UTAH WYOMING* SCALE 1 100 000 < SOURCE EARTHFAX 1991b CHEVRON REFINERY SALT LAKE CITY, UTAH FIGURE 5 LOCATION OF SALT LAKE SALIENT PiiC ENVIRONMENTAL MANAGEMENT INC 15 estunated to be 4,000 feet, of \^ich an estunated 500 to 1,400 feet are C^atonary m age The upper few hundred feet of these sedunents are lacustrme deposits These lacustrme sedunrats were deposited m the former Lake Bonneville and more recently m the shallow Hot Sprmgs Lake Evidence mdicates that the Hot Sprmgs Lake and resultmg deposits are the result of warm water flowmg from the many springs along the warm Sprmg Fault mto a back rotated structural feature called a "sug pond " Fme gramed d^sits immediately below the construction fill at the refmery are thought to be associated with dqK)sition m the shallow lake environments Below the deposits of the Hot Sprmgs Lake are the lacustrme materials associated widi Lake Bonneville The depositional environment of Lake Bonneville near the Chevron property has been affected by the presence of the Salt Lake salient This topographic high created a beach front depositional environment Therefore, sands and silty sands were dqmsited rather than silts and clays of the Hot Sprmgs Lake (EarthFax 1990) These deposits tend to be Imear and most likely transect the entire facility Laterally, lithofacies change from coarser gramed beadi sand near the mountam front to a silty sand farther from the front, rq)resentmg die transition from a beach front to near- shore conditions where silts and very fine sands transported by long shore currents would be deposited and mtemuxed with fine sand Borehole logs from subsurface mvestigations have been used to create an east-west treadmg cross section of the property (Figure 6) Near the n^ountam front, the lacustrme sediments are conqK)sed primarily of sands and gravels, whereas near the western boundary of the property sediment textures are finer with clay and silt dommant Overall, the proxmuty of the Salt Lake salient has had a sigmficant effect on the depositional envu-onment of the upper 10 to 50 feet of sedunents beneath the Chevron property 3 2 2 Hydrogeology Three studies of regional groundwater hydrology of the Salt Lake on Jordan Valley have been conducted smce 1905 Each of these studies have described the hydrology of die valley m terms of an unconfined deep aquifer near the mountam front, a deep confined aquifer below the valley floor, which IS essentially a lateral extension of the unconfined de^ aquifer, and a shallow unconfined aquifer above the confined aquifer In reality, no clear-cut separate aquifers exist and the aquifer names refer to generalizations of complex subsurface conditions These aquifers are found m the lacustrine sediment deposits of Lake Bonneville described previously (Dames & Moore 1985a) 16 RB. 31^R0nSe^dlevnB\nvn!^l eiDe\2-Z3-94\ito 4260 Z i 4140 4f00- IE UJ > ro lO ML CL CL ML iU ML CL ML ML CL SM ML CL CL 3M] CL CONFINED AND UNCONFINED AQUIFERS RECHARGE AREA INFERRED LOCATION OF — DEEP UNCONFINED AQUIFER KEY • APPROXIMATE CONTACT BETWEEN SHAL.L.OW AQUIPER AND CONFINING BED TYPICAL. WINTER - SPRING PHREATIC 'SURFACE IN SHAL.UOW AQUIFER STIPPL.EO AREAS OUTLINE SAND BODIES SOURCE DAMES & MOORE 1985 VERTICAL SCALE IN FEET 0 10 20 HOfflZONTAL SCALE IN FEET 90 0 fSO soo —J CHEVRON REFINERY SALT LAKE CITY UTAH •^laURE 6 EAST - WEST CROSS SECTION ENVIRONMENTAL MANAGEMENT INC 17 Chevron's studies have confirmed the existence of these aquifers beneath the Chevron property The de^ unconfined aquifer is present m the area between the refinery and the foot of the mountains The de^ confined aquifer and the shallow unconfined aquifer are present underneath tbe refine^ Itself Beneath the refinery a zone of prunarily sdty clay sediments is encountered at d^dis rangmg from 1 foot to greater than 100 fe^ These sedunents form a confinmg layer between the shallow, unconfined and deep, confined aquifers The deep confined aquifer is present beneath die confinmg layer at variable depth (Dames & Moore 1985a) Figure 6 also dlustrates the aquifers beneadi the Chevron property 3 2 2 1 Deep Confined and Unconnned Aquifer The deep aquifer is formed from the lacustrme sands and gravels d^sited along the mountam front and IS confined over most of the Chevron property In the vicmity of the Chevron refinery, sediments forming the deep aquifer are lenticular d^sits that decrease m thickness and gram size toward the west Near the eastern edge of the refinery, the de^ aquifer is composed of relatively permeable materials, mcludmg coarse-gramed sands and gravels As the aquifer grades finer toward the west, its permeability also decreases Major lenses of clay and sdt occur throughout the de^ aquifer These clay lenses inhibit the vertical movement of groundwat^ withm the aquifer and isolate shallow portions of the deep aquifer from portions at greater d^ths Permeabdity measurements of the deep aquifer mdicate an average permeabdity of 1 x 10"' centuneters per second (cm/sec) The top of the deep aquifer is defined as the elevation of the first occurrence of a sand or gravel umt, having a minimum thickness greater than 5 feet, located below a confinmg bed Only two of the deep borings located along the western margin of the refinery encountered a sand lens havmg a thickness greater than 5 feet Sediments confining the deep aquifer are generally sdt and clay Laboratory determmations of vertical permeabdity of 24 sedunent samples classified as sdt and clay indicated very low penneabdities, rangmg from 3 1 x lO'* to 3 7 x 10"' cm/sec The geometric mean of these vertical permeabdity measurements is 3 x 10^ cm/sec The confimng beds are generally thickest along the western margin of the site and thinnest along the eastern margm Investigations concermng the nature of the confining layer between the upper and lower aquifers have produced somewhat contradictory results Borehole logs for well EF-2D on the eastern edge of the refinery indicated a confiiung layer beneath the shallow aquifer This momtormg well was mstalled to a d^th of 48 feet However, during an earlier mstallation of three shallow wells (to 18 feet) m this same area, flowmg sands were discovered at the base of two of the three wells Ig RE 312-M80S(S\dinrai\nwrcn.eiiie\2-23-9«\ifcr A portion of the recharge to the confined aquifer results firom the infiltration of water mto the sand and gravel deposits located immediately east of the refinery Additionally, some recharge is derived from coarse deltaic sedunents deposited m the North Salt Lake area immediately north and northeast of the refinery Withm the North Salt Lake area, coarse-gramed dqwsits are sigmficandy greater m areal extent than those east of the Chevron property Although relatively small, some recharge to the confined aquifer is derived from the bedrock aquifers m the mountams east of the refinery Of particular mterest m diis regard is the existence of Beck's Springs Hot Sprmgs located a short distance southeast of the refinery, as well as other thermal sprmgs farther south of the refinery These sprmgs produce large volumes of poor-quality mmeralized sprmg water In addition to sprmg flows, it is expected that some of the mmeralized water recharges the confined aquifer 32 2 2 Shallow Aquifer The saturated zone under the Chevron property mcorporates a wide range of sediments, sods, and other material types such as construction fill and waste Geologic materials m the shallow aquifer vary from clay to coarse gravel These data mdicate there is a transition fro n almost 100 percent sand in the upper 15 feet along the eastern margm to virtually all clay and sdt m the western half of the refinery This range of sediment types is due to the presence of the S"-* Lake Salient The presence of fill material throughout the refinery causes an extremely high degree of variabdity m the properties of this aquifer, as this fill is usually composed of highly permeable gravels and ranges m thickness from 3 to 6 feet Generally, only the bottom few mches of the fUl are saturated Recharge to the shallow aquifer is derived from a variety of different sources that mclude (1) direct infiltration of precipitation and snow melt, (2) seq>age of ponded surface waters, (3) upward leakage of groundwater from the de^ aquifer through the confinmg layer, and (4) to a lesser extent, lateral migration of groundwater from recharge areas east of the refinery Each of these sources of groundwater recharge provides water at different rates and of different quality Disdiarge from the shallow aquifer occurs through a combination of evi^ration from tbe land surface and disdiarge to the Od Dram, as well as surface water collection ditches withm the property boundary Water levels in the shallow aquifer generally reflect land surface topography 19 KB. 31MtOI0Sfi\(te>vnaVi«neim.cB»\2-2344\>b Chevron's recent mvestigations m the NTF revealed sand or flowmg sands at die base of some of the boreholes These subsurface data indicate the shallow, unconfined aquif^ may be m excess of 18 feet duck m diat area (EarthFax 1990) Both slug and specific capacity tests were performed m die refinery area m 1984 Table 4 lists the measured hydraulic conductivities Measured penneabdities ranged from 7 x 10^ to 5 x 10"^ cm/sec and averaged 3 x 10"' cm/sec The highest permeabdity values were associated with the coarse granular sedunents used as construction fill Laboratory d^mnination of vertical penneabdities for 16 samples that were described as sdty sand, clayey sand, or sand ranged between 6 5 x 10* and 1 9 X 10*^ cm/sec, generally lower than would be expected based on the gram size The low vertical penneabdities are possibly the result of thm layers and seams of sdt and clay In 1990, slug tests were performed on eleven momtormg wells, nme m the NTF area Hydraulic conductivities ranged from {^proximately 3 x 10^ to 4 x 10^' cm/sec (Table 5) These values conespond primardy to the sandy portions of the aquifer and are comparable to values obtamed throughout the rest of the refinery 33 GROUNDWATER FLOW SYSTEM The following two sections describe the flow system m both the deep and shallow aquifers 3 3 1 Deep Aquifer Measurement of water levds of momtormg wells m the de^ aquifer show groundwater flows to the southwest beneath the Chevron property (Figure 7) The shape of tbe de^ aquifer's potentiometric surface is generally consistent throughout the year (Dames & Moore 1985a, EardiFax 1991b) The horizontal gradient of the deep aquifer is estimated to be 0 (XX)7 feet per foot (Dames & Moore 1985a) However, water level measurements over the years indicate the gradient is steq>est m the northeastern portion of the property (EarthFax 1993) Groundwater level momtormg m the de^ aquifer also mdicates that heads mcrease at a constant rate of 10 feet per 100 feet of depth (Dames & Moore 1985a) This reveals that there is a strong upward vertical gradient In general, momtormg wells with screened mtervals at 50 or more feet below the ground surface have static water levels above the ground surface and wdl flow if not capped 20 KB. 3ia4IOIOMWk0Vf<B\remcn.CBe\2-2344\ifcr TABLE 4 CHEVRON CME SUMMARY OF 1984 REFINERY AQUIFER TEST RESULTS W«I1 Number Type of AQuifer Test ilsiSnuited %dr«iilic Conductiyi^ -(ctai/sec) S-l Slug 3 6x 10* S-2 Slug 6 7 X lO* S-3 Slug 10x10* S-5 Slug 4 8 X la' S-10 Slug 1 9 X 10-' S-U Slug 5 8 X la' S-12 Q/s 6 8 X la^ S-13 0/s 3 6 X 10-' S-14 Slug 4 8 X 10* 1 S-15 Q/s 3 2 X 10' S-16 Q/s 2 4 X 10» S-17 Slug 1 9 X 10^ S-18 O/s 4 3 X 10' S-19 Q/s 2 9x 10* S-20 Q/s 1 3 X 10' S-21 Slug 3 6 X 10' S-22 Slug 2 5 X 10' S-23 Slug 2 0 X 10' S-24 Q/s 1 6 X 10' S-25 Slug 2 8 X 10' S-26 Slug 1 5 X 10' S-27 Q/s 67x 10* S-29 Slug 2 0 X 10' S-30 Slug 2 9 X 10' S-31 Q/s 1 2 X 10' S-33 Slug 2 9 X 10' S-34 Q/s 1 5 X 10* S-35 Q/s 5 5 X 10' Notes Q/s Specific capacity 21 RB.31MI0n3ackwna\>«»cnieVSWMU4 d>n2-23-94\iiikf TABLES CHEVRON CME SUMMARY OF 1990 NORTH TANK FARM AQUIFER TECTS Monitor Welt Type of Aqtdfer Test l^^uMe Cmductivitjr Co»/«ee) EF-1 Slug 1 5 X 10' EF-2 Slug 1 7 X 10' 1 EF-3 Slug 2 2 X 10' 1 EF^ Slug 33X 10* EF-5 Slug 3 8 X 10' EF-6 Slug 8 4X 10* EF-7 Slug 4 2 X 10' EF-8 Slug 1 6 X 10' EF-9 Slug 1 1 X 10' S-16 Slug 3 9 X 10' S-19 Slug 5 8X 10* 22 RE. 312-R0WSAcl»vnBVrMcn»\SWMU5 Ibn2-23.94\iiikf DATE 1Z/I(V93 JLH DN RL£ NAME. aiS>\n08058VTm£ DFW 0-4 SOURCE EARTHFAX, 1993 uomo o-t • occ^ HOHnoi wot L. sso* TOO- _J SCAU CHEVRON REFINERY SALT LAKE CITY UTAH FIGURE 7 POTENTIOMETRIC MAP OF THE DEEP AQUIFER FOR APRIL 1993 PRC ENVIRONMENTAL MANAGEMENT INC 33 J, Shallow Aquifo* Measurement of water levels m shallow momtormg wdls on Chevron's property indicates that groundwater flows generally towards the west or southwest The fall 1992 and sprmg 1993 water table maps for the refinery are m Figures 8 and 9, respectively This southwest flow direction means the shallow aquifer flows toward the Od Dram As shown on Figure 2, the Od Dram borders the entire western boundary of the Chevron property Therefore, the Od Dram mterc^ts the shallow groundwater flowmg away from the Chevron refinery The Bonneville Canal, which was recendy filled m, runs east to west through the central portion of tbe refinery and mtercepts the shallow groundwater The eastern portion of the canal is contmuous with 420 feet of the southern boundary of the NTF area The potentiometric surface mi^s generated for the NTF mdicate the water discharges mto this canal The western end of the canal is used as the final retention pond for the wastewater treatment system where water is discharged under Chevron's National Pollutant Discharge Elimination System (NPDES) permit from the retention pond to the Od Dram Discharge estunates from the upper aquifer beneath the NTF were calculated at 2 5 acre-feet per year m sprmg 1990 and 1 6 acre-feet m fall 1990 (EardiFax 1990, 1991a) Chevron's consultant believes the current database of discharge estunates is insufficient to determine <f 9l! this water discharges mto the canal Horizontal gradients for the shallow aquifer measured m 1984 varied from 0 2 feet per feet m die northeast comer of Chevron's property to 0 002 feet per feet m the central area of the refinery (Dames & Moore 1985a) This pattern of ste^est potentiometric surface m die northeast quarter of the Chevron property becoming less steep to the west and south has remamed constant through the years (Figure 9) Recent mvestigations at the NTF area also dlustrate this flattenmg of the horizontal gradient toward the west and south portions of the refin^ Water level measurements m the shallow aquifer over the past 10 years have exhibited strong seasonal variations In the refinery area, seasonal variations as much as 7 feet have been noted (Dames & Moore 1985a) Figures 10 and 11 are hydrograpbs showmg die seasonal changes between 1984 and 1993 The highest elevations are in the sprmg, tbe lowest are m late summer These seasonal fluctuations have also affected the groundwater flow dvection 24 *B 31^R0«66\cfawraBWreia.aM\2-23-94\)kr DATE 12n(V83 JIH DN Fll£ NAME aiZtfUSOSAmif DRW SOURCE EARTHFAJ^ 1993 LEGEND S-l O SHAUOW UOHITOR WELL 350 —I 700 _J SCALE CHEVRON REFINERY SALT LAKE CITY UTAH FIGURE 8 POTENTIOMETRIC MAP OF THE SHALLOW AQUIFER FOR OCTOBER 1992 pnc ENVIRONMENTAL MANAGEMENT. INC DAIC 12^003 Ail DN FILENAME312m805evnTLE.DRW UGCN9 S-l O SHMtOW MOMTM WtU cr L. 390 TOO* SCAU CHEVRON REFINERY SALT LAKE CITY UTAH S-27 0 °s-2%°' FIGURE 9 POTENTIOMETRIC MAP OF THE SHALLOW AQUIFER FOR APRIL 1993 SOURCE EARTHFAX, 1991a PiiC ENVIRONMENTAL MANAGEMENT INC DATE 12/ta«3 JLH DN FILE NAME. 312\IU805evnTLEJ}RW 4,235 4,210 Mar-84 Jul-85 Nov-86 CHEVRONUSA Salt Lake Refinery Mar-88 Jul-89 DATE Oct-90 Feb-92 Jun-93 SOURCE EARTHFAX, 1993 S-3 ~+- S-4A S-5 -B- S-35 CHEVRON REFINERY SALT LAKE CITY UTAH FIGURE 10 HYDROGRAPH OF UPGRADIENT SHALLOW MONITORING WELLS PRC ENVIRONMENTAL MANAGEMENT INC 4219 0 4209 0 Mar-84 Jul-85 Nov-86 Mar-88 Jun-89 DATE Oct-90 Feb-92 Jun-93 CHEVRONUSA Salt Lake refinery SOURCE EARTHFAX, 1993 -B- S-12 -S- S-13 S-14 S-15 CHEVRON REFINERY SALT LAKE CITY UTAH FIGURE 11 HYDROGRAPH OF SHALLOW MONITORING WELLS PRC ENVIRONMENTAL MANAGEMENT INC A study performed by Dames & Moore m 1985 indicates that m the summer, evaporative discharge of shallow groundwater lowers the elevation of the water table surface between the Oil Dram and Jordan River and may create a groundwater dq>ression m dus area The resulbqg lateral groundwater gradients may permit a small quantity of water m the shallow aquifer to migrate under and west of die Od Dram Durmg wmter and sprmg, precipitation mcreases groundwater elevations, revwsmg groundwater flow back to the Oil Dram Migration of this groundwat^ beyond a pomt located approxunately halfway between the Oil Dram and Jordan Riwer is not possible because this area is a groundwater divide throughout the year (Dames & Moore 1985a) Chevron's consultants have also calculated the rate of groundwater flow mto the Oil Dram usmg flow sections and water level data from 1984 These calculations produced flow rates from die shallow aquifer mto the Oil Dram of between 3 and 15 gallons per mmute (gpm) Vertical gradients m nested shallow momtormg wells were also calculated In 1984, an iq)proxunate upward vertical gradient of 0 1 foot per foot was calculated (Dames & Moore 1985a) No other vertical gradients were calculated by Chevron's consultants Both of Chevron's consultants. Dames & Moore and EarthFax, have concluded that diere is only a mmimal potential for shallow groundwater to flow vertically to the de^ aquifer This conclusion is based on several factors One is water table maps which illustrate shallow groundwater discharge mto eidier the Oil Dram or Bonneville Canal (Dames & Moore 1985a, EardiFax 1990) In addition, previous data indicate the average horizontal hydraulic conductivity of the shallow aquifer is approximately 100 times greater than its vertical hydraulic conductivity and about 10,000 tunes greater than the vertical hydraulic conductivity of the aquitard that s^arates the shallow aquifer from die deep aquifer Smce groundwater follows the path of least resistance and die sedunents that comprise the uppermost aquifer are essentially horizontally stratifled, the large contrast between the horizontal and vertical hydraulic conductors favors horizontal flow (EarthFax 1991b) Also, the strong upward directed vertical gradients m the deep aquifo* would mhibit flow of groundwater firom the shallow, unconflned aquifer 1 3 4 ADEQUACY OF FACILITY'S HYDROGEOLOGIC ASSESSMENT Chevron's consultants have conducted subsurface mvestigations at the refmery These mvestigations have given Chevron an adequate understandmg of the subsurface stratigraphy and hydrogeologic properties of the various lithologies to design a groundwater momtormg system The current groundwater momtormg system includes shallow and de^ momtormg wells citable of detectmg releases from the reflnery as a whole but not from individual RCRA-regulated umts 29 31^R0«0S6Vii«vnii\rammoBe\»23-94\i1cr Two aspects of the hydrogeology beneath the Chevron property requure further explanation or mvestigation One is conflmung the presence of a confinmg layer beneadi the shallow aquifer at die NTF Two sqparate mvestigations have reached somewhat contradictory conclusions regardmg tbe presence of the confinmg layer The first mvestigation installed three shallow Qess dian 18 feet de^) momtormg wells Bordiole logs revealed the presence of flowmg sands at die base of all three shallow momtormg wells It was concluded that sufficient data did not exist to establish the base of the shallow aquifer The second mvestigation mstalled six shallow and one deep momtormg wells The deep momtormg well was mstalled to a d^th of 48 feet Borehole logs for the de^ momtormg well dlustrated a confinmg layer beneath the shallow aquifer Additional mvestigation should be conducted to correlate the location of the confinmg layer between the shallow and deep aquifers m the NTF area of the refinery with the remamder of the refinery The second aspect is a determination of whether all shallow groundwater is mterc^ted by the Oil Drain Earlier studies concluded that although a small quantity of shallow groundwater may nugrate west of the Oil Dram, the seasonal groundwater moundmg between the Jordan River and the Od Dram reverses the groundwater flow back to the Oil Dram The presence of seasonal groundwater mounding has not been confirmed and smce this affects the potential for nugration off site, the eflectiveness of the OU Dram to capture all shallow groundwater should be mvestigated further The interaction between the shallow groundwater and the Bonneville Canal is no longer a concern As of February 1994, the portion of the Bonneville Canal direcdy south of the NTF area has been excavated All water has been removed and rqilaced with clean fill 4 0 MONITORING WELL SYSTEM DESIGN AND CONSTRUCTION To satisfy the requu-ements of 40 CFR 265 Subpart F, the momtormg system should mclude At least one momtoring well installed hydraulically upgradient of the regulated umt to yield groundwater samples r^resentative of background groundwater quality not affected by the umt At least three momtormg wells mstalled hydraulically downgradimt to immediately detect any statistically sigmflcant amounts of hazardous waste or hazardous waste constituents nugratmg from the regulated umt to the uppmnost aquifer All momtormg wells must be properly installed to yield r^resentative groundwater samples 30 KB- 31^1UM0Se\cWIal\l«mm.cm•^2•2^-M\lt^ There are currendy sue RCRA-regulated umts withm die Chevron reflnery These are the Resovou:, API Separator Sludge Pit, TEL Weathermg Area, Baffle Board Pond, Hazardous Waste Landfill, and Storm Surge Pond These six umts are undergomg dosure The construction of all momtormg wells on the property was reviewed to assist EPA m detenmmng the existmg systems iqipropriateness for future RFI activities Section 4 1 discusses the design of die momtormg wdl system and Section 4 2 reviews the construction details 4 1 MONIFORING WELL SYSTEM DESIGN Chevron began installmg momtormg wells to create a momtormg system capable of detectmg any releases from the waste management facility m 1981 Two upgradient momtormg well pairs were placed in the northeastern comer of the refinery These momtormg wells are S-5, D-5, S-4 and D-4 The designations S and D stand for shallow and de^ The downgradient momtormg wells were defined as S-2, D-2, S-10, D-10, S-11 and D-11 These three momtormg well pairs were considered to complete the minimum requu'ed trio of downgradient momtormg wells (Dames & Moore 1982) An additional eight momtormg wells were also mstalled m 1981 These momtormg wells were located across the refinery property In 1984, pursuant to the Compliance Order on Consent (State of Utah 1984), Chevron mstalled another 30 momtormg wells m the reflnery area One background momtormg well pau- S-35 and D-35, was mstalled m the northeastern comer of the refinery The Compliance Order on Consent also stated that if momtormg wells S-4, D-4, S-5, and D-5 were shown not to contam contammation, they could also be considered upgradient or background momtormg wells Tbe downgradient or compliance pomt momtormg wells were defined as S-l, S-2, S-10, S-U, S-24, D-l, D-2, D-10 and D-l 1 Four momtormg wells were also mstalled to momtor water quality downgradient of speciflc umts These are S-13 at the TEL Weathermg Area, S-19, and S-14 at the waterdraw trenches, and S-12 at the Hazardous Waste Landfill The remammg 24 momtormg wells were mstalled across the reflnery as fluid level control monitoring wells and sewer canal mtegration momtormg wells Three more monitoring wells were mstalled m November 1984 An additional 16 momtormg wells were mstalled between April 1991 and January 1992 All momtormg wells at die refmery were redeveloped durmg the sprmg of 1992 Figure 3 illustrates all the momtormg wells at die refinery 31 RE. 312-R0«0SAckma>\mKm cme\2-2}-94\ifa' The previous discussion illustrates that the design of the momtormg wdl system m the refinery area is not adequate to detect releases from the individual RCRA-regulated umts The current design is only capable of detectmg general rdeases from the whole refinery area 4 2 MONITORING WELL CONSTRUCTION DATA A total of 80 momtormg wells have been mstalled at the Chevron's refinery smce 1981 The construction details for momtoring wells m the refinery ^pear m Table 6 No momtormg well constmction diagrams were created for any of momtormg wdls mstalled m 1981 or 1984 All available construction mformation was summarized on a table m die GWQAR (Dames & Moore 1985a) This table and the bordiole logs are mcluded m Appendu B of this CME report Very little is known about the momtormg wells mstalled m 1981 Missmg mformation mcludes casing type, top of casmg elevation, filter pack type and d^th, seal dq>th, and drillmg method A description of the momtormg well constmction on the GWQAR provides some additional constmction details on the momtormg wells mstalled m 1984 Tlie 1984 momtormg wells utilized polyvmyl chloride (PVC) casing, had 20-40 sand filter packs, and were drilled by augers The depth of the filter pack and bentomte seal are still unknown Drillmg logs containmg complete wdl constmction mformation were prepared for momtormg wells installed m 1991 and 1992 All momtoring wells are open, as all the wells listed m Table 6 were measured for water level evaluations m sprmg 1993 However, it is not clear whether all these wells are stdl die origmal wells The GWQAR states that well S-10 was accidentally pulled out m 1984 The momtormg well was reconstmcted to the original specifications The designations for several other wells have been modified over the years, possibly mdicatmg die origmal wdls were r^laced Tables of water level elevations for spring 1993 table lists designations of S-4A, D-IA and D-5A rather than S-4, D-l and D-5 (Dames & Moore 1991, EarthFax 1993) No explanation of these new designations is provided Although compile constmction information for the momtormg wdls installed m 1981 and 1984 is not available, the unportant mformation such as screened mtemal and total d^th are known Complete well constmction mformation is avaUable for die newer momtormg wells Overall, it appears that die momtormg wells m the refinery have been constmcted adequatdy The redevelopment of all momtormg wells in 1992 mdicates that all momtormg wells are available for future RFI activities The only mformation that should be provided is further clarification of the unexplamed momtormg well designations 32 KB. 31^1tO•05S\ckema\nvn>a.ea•\^23^\ricr TABLE 6 CHEVRON CME REFINERY MONITORING WELL COMPLETION SUMMARY Commentt Wd! Number Date Completed Total Depdk Drfflcd (ft bgs) Total Deptb Cased (It l«s) Diameter and Tfptt Top of Casmg Elevatioa Screened Interval (It bgs) Skit size On) rilter Pack (ftbgs) Bentodde Seal Dnimg Method ISnSinv Log Contab Ofl Phase Status S-5 5-6-81 15 5 ISO 2" Unknown 2 0-15 0 (010) Unknown Yes Unknown Y N o 1 S-3 5-7-81 15 0 15 0 2" K nknown 1 0-15 0 (010) Unknown Yes Unknown Y N O S-l 5-11-81 15 0 15 0 2" Unknown 1 0-15 0 (010) Unknown Yes Unknown Y N O S-2 5-11-81 15 0 15 0 2" Unknown 7 0-15 0 ( 010) Unknown Yes Unknown Y Y 0&R7 D-3 5-14-81 900 900 5" Unknown 60 0-90 0 ( 010) Unknown Yes Unlmown Y U o 1 D-5 5-26-81 865 85 0 5* Unknown 35 (V85 0 ( 010) Unknown Yes Unknown Y U 0&R7 1 D-l 6-8-81 900 900 5" Unknown 60 0-90 0 ( 010) Unknown Yes Unknown Y U 0&R7 1 D-2 6-17-81 900 800 5* Unknown 30 0-80 0 ( 010) Unknown Yes Unknown Y U 0 D-4 8-11-81 81 5 800 2" Unknown 43 0-70 0 ( 010) Unknown Yes Unknown Y u o S-4 8-12-81 200 17 0 2" Unknown 2 0-17 0 ( 010) Unknown Yes Unknown Y N 0&R7 S-6 8-12-81 17 0 17 0 2" Unknown 2 0-17 0 ( 010) Unknown Yes Unknown Y N O S-7 8-12-81 15 0 15 0 2" Unknown 1 0-15 0 (010) Unknown Yes Unknown Y N 0 S-8 8-13-81 19 5 19 5 2" Unknown 4 5-19 5 ( 010) Unknown Yes Unknown Y N O S-9 8-13-81 17 0 17 0 2" Unknown 2 0-17 0 (010) Unknown Yes Unknown Y N O S-10 11-2-81 250 17 5 2" Unknown 3 5-17 5 (010) Unknown Yes Unknown Y N OAR S-11 11^81 19 5 18 5 2" Unknown 2 5-18 5 (010) Unknown Yes Unknown Y N o R S D U o « replacement well constructed shallow deq> unknown open surface elevation 33 RE. ^l^lttNOSe\dlWTaB\l«vclB»\SWMU0 tbia-23-M\aikf TABLE 6 (Continued) CHEVRON CME REFINERY MONITORING WELL COMPLETION SUMMARY WeB Number Date Completed total D^ Dniled (ft fags) Total Depth Cased (ftbgs) Casmg Diameter and Type Top of Casmg Elevation Screened Interval (ft bgs) Slot sue (in) Filter Pack (ftbgs) Bentooite Seal DriHmg Method Comments WeB Number Date Completed total D^ Dniled (ft fags) Total Depth Cased (ftbgs) Casmg Diameter and Type Top of Casmg Elevation Screened Interval (ft bgs) Slot sue (in) Filter Pack (ftbgs) Bentooite Seal DriHmg Method Existnli^ Lo« C0Bt*Bt Oa Phase Status D-10 11-4-81 97 0 97 0 2" Unknown 71 5-97 0 ( 010) Unknown Yes Unknown Y U 0 D-11 11-5-81 114 5 113 0 2" Unknown 98 0-113 0 ( 010) Unknown Yes Unknown Y U 0 S-33 2-15-84 13 0 12 3 2" PVC Unknown 2 3-12 3 ( 016) 2040 Sand Yes Auger Y N 0 S-29 2-16-84 13 0 11 5 2" PVC Unknown 1 5-11 5 (016) 20-40 Sand Yes Auger Y N O S-36 2-16-84 13 0 13 0 2- PVC Unknown 3 0-13 0 ( 016) 2040 Sand Yes Auger Y N O S-28 2-20-84 220 206 2" PVC Unknown 2 6-20 6 ( 016) 20-40 Sand Yes Auger Y N O S-28U 2-20-84 80 75 2" PVC •nknown 2 5-7 5 (0 16) 20-40 Sand Yes Auger N N O S-28L 2-20-84 200 19 0 2" PVC Unknown 2 5-7 5 (0 16) 20-40 Sand Yes Auger N N S-30 2-21-84 15 0 13 8 2" PVC Unknown 2 8-13 8 (0 16) 2040 Sand Yes Auger Y N o S-31 2-21-84 13 0 12 5 2" PVC Unknown 1 5-12 5 ( 016) 20-40 Sand Yes Auger Y N o S-26 2-22-84 15 0 15 0 2" PVC Unknown 2 5-15 0 ( 016) 2(M0Sand Yes Auger Y N o S-27 2-22-84 12 5 12 0 2- PVC Unknown 2 0-12 0 (0 16) 2040 Sand Yes Auger Y N o S-32 2-23-84 12 5 12 0 2" PVC Unknown 2 0-12 0 ( 016) 2040 Sand Yes AugCT Y N o S-34 2-23-84 12 5 12 3 2" PVC Unknown 2 3-12 3 ( 016) 20-40 Sand Yes Auga Y N o 1 S-22 2-27-84 12 5 11 7 2" PVC 94 90 17-117 (0 16) 20-40 Sand Yes Auger Y N o 1 S-23 2-28-84 12 5 12 0 2" PVC Unknown 2 0-12 0 ( 016) 2040 Sand Yes Auger Y N 0 1 S-24 2-28-84 12 5 11 3 2" PVC Unknown 1 3-11 3 (016) 20-40 Sand Yes AugCT Y N o 1 1 S-21 2-29-84 13 0 12 0 2" PVC Unknown 1 5-12 0 ( 016) 2040 Sand Yes Auger Y N 0 1 R S D U O « replacement well constructed shallow deep unknown open sur&ce elevation 34 KE. 3124UIS(tf6^GliewnB\mciiis\SWMU6.ai\2-2344\iBkf TABLE 6 (Continued) CHEVRON CME REFINERY MONITORING WELL COMPLETION SUMMARY WeU Number Date Completed Total Depth Dniled (ft bgs) Total Depth Cased (ftbgs) Casing Diameter and Type Top^f Casmg Elevation Screened Interval (ft bgs> Slot sue (in) titter Padk (ftbgs) Beotonite Seal DHBmg Mediod Cdmmeiiifs | WeU Number Date Completed Total Depth Dniled (ft bgs) Total Depth Cased (ftbgs) Casing Diameter and Type Top^f Casmg Elevation Screened Interval (ft bgs> Slot sue (in) titter Padk (ftbgs) Beotonite Seal DHBmg Mediod fixliting hog Cinltani oa Phase statu j S-25 2-29-84 13 0 12 4 2" PVC Unknown 2 5-12 5 ( 016) 2040 Sand Yes AugCT Y N ° 1 S-2U 3-1-84 11 0 11 0 2" PVC Unknown 4 0-11 0 (01) 20-40 Sand Yes Auger N Y o S-2L 3-1-84 15 5 15 3 2" PVC Unknown 13 8-15 3 ( 010) 20-40 Sand Yes Auger N Y O S-12 3-1-84 19 0 18 9 2' PVC Unknown 3 8-18 8 ( 016) 2040 Sand Yes Augw Y Y 0 S-13 3-2-84 14 0 11 9 2" PVC Unknown 19-119(016) 2040 Sand Yes Auger Y N 0 S-18 3-5-84 19 0 16 8 2" PVC Unknown 4 3-16 8 ( 016) 2040 Sand Yes Auger Y N o S-14 3-5-84 12 0 12 0 2* PVC Unknown 2 0-12 0 ( 016) 2040 Sand Yes Auger Y N o S-15 3-6^ 12 5 12 3 2" PVC Unknown 1 8-12 3 ( 016) 2040 Sand Yes Auger Y N o S-16 3-6-84 12 0 115 2' PVC Unknown 1 5-11 5 ( 016) 2(M0Sand Yes AugCT Y N o S-20 3-6-84 13 0 13 0 2" PVC Unknown 2 2-13 0 ( 016) 20-40 Sand Yes Auger Y N o S-17 3-7-84 12 0 10 9 2" PVC Unknown 1 4-10 9 (016) 2040 Sand Yet Augw Y N o S-19 3-8-84 11 5 11 2 2" PVC Unknown 1 2-11 2(016) 2040 Sand Yes Auger Y N o S-35 3-9-84 18 0 16 0 2 PVC Unknown 4 0-16 0 ( 016) 2040 Sand Yes Aug» Y N o D-35 3-16-84 75 0 75 0 2" PVC Unknown 47 0-75 0 ( 016) 2040 Sand Yet Auger Y U o 1 D-28 11-19-84 102 0 102 0 0 8" PVC Unknown 100 0-102 0 (010) 2040 Sand Yes Auger Y U ^ 1 D-36 11-20-84 101 5 101 5 0 8" PVC Unknown 99 5-101 5 ( 010) 2040 Sand Yes Auget Y U 0 1 D-33 11-27-84 101 5 101 0 0 8" PVC Unknown 99 0-101 0 ( 010) 2040 Sand Yes Auger Y u o { R S D U O « replacement well constructed shallow deq> unknown open surface elevation 35 RE. 312-ltOIOSe\ciMwna\imci»VSWMU6.fbiy2-23-9tVnilcf TABLE 6 (Continued) CHEVRON CME REFINERY MONITORING WELL COMPLETION SUMMARY Wcfi Number Date Completed Total Depth Adlled (ftbgs) Total Depth Cased (ftbgs) Casmg Diameter and Type Top of Casing Elevation Screened Interval (ft bgs) Slot sue (in) FiKerPaCk (ftbgs) Bentooite Seal Driffing Method Comments Wcfi Number Date Completed Total Depth Adlled (ftbgs) Total Depth Cased (ftbgs) Casmg Diameter and Type Top of Casing Elevation Screened Interval (ft bgs) Slot sue (in) FiKerPaCk (ftbgs) Bentooite Seal Driffing Method C^dstiag hog Contam Oil Phase Statos D-34 12-20-91 115 115 2" PVC 4213 43 100 0-115 0 (010) 95 0-115 0 20-40 Sand 15 0-95 0 Cable Tool Y U O D-34-0D 1-3-92 115 5 115 2" PVC 4213 43 100 0-115 0 (010) 95 0-115 0 2040 Sand 15 0-95 0 Cable Tool Y u 0 1 D-1-00 12-9-91 91 90 2" PVC 4214 18 50 0-90 0 ( 010) 55 0-91 0 21-40 Sand 15 0-55 0 Auger Y u 0 1 EF-13-OS 12-9-91 32 31 2" PVC 4211 92 21 0-31 0 (010) 20 0-32 0 2040 Sand 0-20 ft Auger Y u 0 1 EF-10 4-23-91 18 16 7 2" PVC 4214 27* 1 3-17 0 ( 010) 1 0-17 0 20- 40 Sand 0 0-1 Oft Auger Y u O 1 ^^'^^ 4-23-91 18 16 7 2" PVC 4211 13* 1 5-16 2 ( 010) 1 0-17 0 20- 40 Sand 0-1 Oft Augrar Y u O 1 EF-12 5-22-91 33 33 2* PVC 4211 80* 28 0-32 5 ( 010) 23 0-33 0 2(M0Sand 0-23 ft Auger Y u 0 1 EF-13 5-17-91 27 27 2" PVC 4211 55* 16 5-26 5 ( 010) 14 0-27 0 2040 Sand 0-14 ft Auger Y u 0 1 EF-14 5-21-91 34 33 2* PVC 4211 92* 28 0-32 5 ( 010) 23 0-34 0 2040 Sand 0-23 ft AugCT Y u 0 EF-15 6-27-91 18 11 77 2" PVC 4211 29* 1 2-17 2 ( 010) 1 0^16 0 20- 40 Sand 0 0-1 Oft AugM-Y u 0 EF-16D 10-28-91 95 94 75 2" PVC 4216 10 64 0-94 0 ( 010) 58 0-94 0 2040 Sand 53 0-58 0 Cable Tool Y u R S D U o replacement well constructed shallow deq> unknown open surface elevation 36 KE. SlMUNOSOcfawnaWciMVSWMUe «il\»23-»4\nkf TABLE 6 (Continued) CHEVRON CME REFINERY MONITORING WELL COMPLETION SUMMARY Wen Numfawar Date Completed Total Depth Drilled (ft bgs) Totid Depth Cased (ft bgs) Casing Diameter and Type Top of Casmg Elevation Screened Interval (ft bgs) Skit sue (hi) Filter Pack (ftbgs) Bentomte Seal Drillmg Method Comments Wen Numfawar Date Completed Total Depth Drilled (ft bgs) Totid Depth Cased (ft bgs) Casing Diameter and Type Top of Casmg Elevation Screened Interval (ft bgs) Skit sue (hi) Filter Pack (ftbgs) Bentomte Seal Drillmg Method I«g Contahl Oa Phase Status EF-17D 12-15-91 120 118 2" PVC 4213 35 103 0-118 0 (010) 98 0-118 0 20-40 Sand 15 0-98 0 Cable Tool Y U O D-5-0DA 10-8-91 87 82 5 2" PVC 4221 81 33 0-83 0 ( 010) 30 0-83 0 2040 Sand 25 0-30 0 Cable Tool Y u O D-5-0DB 11-28-91 90 85 2" PVC 4222 40 35 0-96 0 ( 010) 30 0-96 0 2(M0Sand 16 0-30 0 Cable Tool Y u O 1 D-5-0DC 11-28-91 90 85 2" PVC 4221 25 35 0-96 0 ( 010) 30 0-96 0 20-40 Sand 15 0-30 0 Cable Tool Y u O S-23-OS 9-20-91 12 5 12 0 2" PVC 4216 95 2 0-12 0 ( 010) 1 0-12 5 20- 40 Sand 0 0-10 Auger Y u 0 North Tank Farm (SWMU 48) 1 EF-1 Unknown 18 0 16 5 4" SUmless Steel 4223 85 1 75-16 5 (0 010) 1 25-18 0 (20-40 Sand) 0 0-125 Auger Y Y o 1 1 EF-2 Unknown 18 0 15 5 4" Stamless Sted 4219 73 0 75-15 5 ( 010) 05-18 0 (20- 40 Sand) 00-05 Auger Y Y 0 1 1 EF-3 Unknown 18 0 18 0 4" Stamless Steel 4219 36 3 5-18 0 ( 010) 0 4-18 0 (20-40 Sand) 00-05 Auger Y Y ° 1 1 EF-2D Unknown 480 480 2" Stamless Steel 4219 7 32 5-48 0 ( 010) 31 5-48 0 (16-30 Sand) 10 0-35 0 Augn Y N 0 EF-4 Unknown 230 16 5 2" Stamless Steel 4220 1 1 5-16 5 ( 010) 1 0-16 5 (16-30 Sand) 0 0-10 Auger Y Y O EF-5 Unknown 240 16 5 2" Stamless Steel 4225 4 1 5-16 5 ( 010) 0 5-24 0 (16-30 Sand) 00-05 Auger Y Y 0 R S D U O • r^lacement well constructed shallow deep unknown open sur&ce elevation 37 KR 312-IUM0SS\dkwna\iOTaB»\SWMU6 *n^2^-SM\lBkf TABLE 6 (Continued) CHEVRON CME REFINERY MONITORING WELL COMPLETION SUMMARY Wdl Number D*te Completed Total Depth DriUed (ft bgs) Total Depth Cased (ft bgs) C«smg Diameter and Type Top of Casbg Etevatwn Screened Interval (ft fogs) Slot size On) tdterPadc (ftbgs) Bentande Seal DriBiag Method Comments | Wdl Number D*te Completed Total Depth DriUed (ft bgs) Total Depth Cased (ft bgs) C«smg Diameter and Type Top of Casbg Etevatwn Screened Interval (ft fogs) Slot size On) tdterPadc (ftbgs) Bentande Seal DriBiag Method EnStittg Log Cotttab oa Phase Status EF-6 Unknown 250 16 5 2" Stainless Steel 4220 2 1 5-16 5 ( 010) 1 0-25 0 (16-30 Sand) 0 0-10 Auger Y Y 0 EF-7 Unknown 260 16 5 2" Stamless Steel 4219 1 1 5-16 5 ( 010) 1 0-26 0 (16-30 Sand) OO-l 0 Augw Y Y O EF-8 Unknown 220 16 5 2" PVC 4228 4 1 5-16 5 ( 010) 0 5-22 0 (16-30 Sand) 10 Auger Y Y 0 EF-9 Unknown 200 16 5 2" Stamless Steel 4217 7 1 5-16 5 ( 010) 0 5-20 0 (16-30 Sand) 00-05 Auger Y Y 0 EF-505A Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown EF-505B Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown i EF-505C Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown R S D U O * r^laconent well constructed shallow deep unknown open sur&ce elevation 38 vs. 312-]tOiOS)ntbMi«B\rMeBt\SWMU<(bl\2-23^\nlcf Chevron began an mvestigation at the NTF, SWMU 48, m Novwnber 1989 A total of 13 momtoring wells have been mstalled m the NTF Three groundwater momtormg wells (EF-1, EF-2, EF-3) were mstalled m 1990 to allow for upgradient, mtermediate, and downgradient momtormg of the uppermost aquifer beneath the NTF (EarthFax 1990) The momtormg wells were mstalled to 18 feet below ground surface (bgs) to mvestigate the presence of free^hase hydrocarbons m the groundwater In 1991, seven additional groundwater momtormg wdls (EF-2D and EF-4 through EF-9) were mstalled as part of the Phase n mvestigation at the NTF (EarthFax 1991a) Six of the seven momtormg wells were mstalled m the uppermost aquifer and one momtormg well (EF-2D) was mstalled mto the de^er aquifer This momtormg wdl was screened below the confinmg layer separating the two aquifers at this location An additional three momtormg wells were installed m 1992 As shown in Table 6, momtoring well construction details are known exc^t for the date completed for 10 of the 13 momtormg wells All but one of the NTF momtormg wdls were complied with stainless steel casmg Momtoring well EF-8 is located near buried cathodic protection devices so all PVC materials were used All shallow momtormg wells contamed floatmg, free-phase hydrocarbons All the monitoring wells were redeveloped m 1992 No construction information was found for the NTF monitoring well series EF-50SA through EF-50SC The only reference to these momtormg wells was their depiction on a 1993 map (Figure 3) The details of these momtormg wells should be located and reviewed The available construction mformation mdicates that nme NTF momtormg wells were constructed adequately and are appropriate for future RFI activities 5 0 GROUNDWATER MONITORING PROGRAM Chevron established a formal groundwater momtormg program followmg the May 23, 1984 Compliance Order on Consent between Chevron and the State of Utah Widim 30 days of tfiis order. Chevron implemented a groundwater assessmrat program As part of this program. Chevron submitted a groundwater quality assessment plan The plan designated momtormg wells that would be sampled and cbenucal analyses that would be performed Four months of samplmg of selected monitoring wells was requu'ed for the first year (1984) Thereafter, samplmg was requu'ed semi-annually for the 30-year duration of the consent order A CAO was issued to Chevron on April S, 1991 which superseded the May 23, 1984 Compliance Order on Consent The number of 39 KB. 312«0«aSAchMnB\l«vIc>m.cBle^^2^-M\)kr momtormg wells requu-ed to be san4>led remamed the same, however, some analytical parameters were changed (State of Utah 1991) Tables 7 and 8 present the requu-ed 1984 and 1991 consent order groundwater momtormg parameters Chevron conducted 22 samplmg events smce 1984 to satisfy the compliance order on consent and CAO requirements Tables 9 and 10 summarize the groundwater history at the refinery mcludmg the NTF In 1984, four samplmg events occurred (July, August, September, and October) and m 1985 three samplmg events occurred (January, Aprd, and November) Chevron's groundwater momtormg plan states that a statistical comparison would be conducted on analytical results The company conducted a student t-test at the 0 05 levd of sigmficance A one-tailed test was used for all parameters except for pH, where a two-tailed test was used These statistical analyses were conducted on analytical results from the first four samplmg events m 1984 More recent statistical analyses have not been performed Statistical comparisons were made to detemune whether a sigmficant difference m concentrations of target inorganic parameters existed between the three background momtormg wells (S-35, S-4, and S-5) Tbe results showed that it was not appropriate to use all three upgradient momtormg wells as representative of background but only momtormg well S-35 All orgamcs were present at levels below the detection lumt in the three upgradient wells, therefore the presence of an orgamc compotmd in any downgradient well more than once indicates the possibility of contammation Statistical comparisons between upgradient and downgradient momtormg wells were difficult For metals, the high total dissolved solids (TDS) contmt of the shallow groundwater resulted m higher detection limits for metals m downgradient samples These high detection Imuts for many metals made many of the statistical comparisons meanmgless (Dames & Moore 1985a) 6 0 SURFACE AND GROUNDWATER QUALITY EVALUATION The followmg sections present and discuss the groundwater and surface water data for tbe refmery Of tbe 80 momtormg wells installed at the Chevron refmery, specific momtormg wells were selected for sampling as part of the consent order Shallow momtormg wdls S-l, S-2, S-5, S-10, S-U, S-24, and S-35 and deep momtormg wells D-l, D-2, D-4, D-5, D-10, D-11, and D-35 were selected to assess groundwater quality at the refinery Figure 3 dlustrates the momtormg well locations 40 UL 313«Daa9«dMvraB\fwran caMX^JS-MVikr TABLE? CHEVRON CME GROUNDWATER MONITORING PARAMETERS 1984 CONSENT ORDER A General B Total Metals Alkalmity Arsemc pH Barium TDS, TOC, TOX Cadmium Specific conductance Lead Oil and Grease Mercury Orgamc Nitrogen - Kjeldahl Selemum Ammoma Silver Fluonde Nickd Reactive Sulfide Vanadiiun Cyamde Zmc Benzene Pyrene Carbon Tetadiloride Pyridme (Zhlorobenzene Polychlonnated Biphenyls (7 types) DDD 1,1,1 Tridiloroethane DDE Benzo (a) anthracene 2, 4,D Benzo (a) pyrene 0-Cresol 3,4 Benzofluoranthene M & P-Cresol Beazo (k) fluoranthene Chloroform Acou^htbylene Cyclohexane Anthracene Ethyl benzene Benzo (ghi) perylene N^thalene Fluorene Phenol Phenanthrene Toluene Dibenzo (ah) anthracene Chloroethane Indeno (1, 2, 3 cd) pyrene Chlormated edianes Tnchloroethene Xylene 41 RE.31MU)iaX\cbensa\raraiw\SWMU7 d(ia-24-M\iidcf TABLES CHEVRON CME GROUNDWATER MONITORING PARAMETERS 1991 CORRECTIVE ACTION ORDER General Ba.<!e/Neutra] Organic*: Calcium Anthracene Magnesium Benz (a) antiiracene Potassium Benzo (b) fluoranthme Sodium Benzo (k) fluorantfarae Sulfate Benzo (a) pryene Chloride Bix (2-dhylhexyl) phthalate Alkalmity Butyl benzyl phthalate Nitrate -1- Nitrite as N Chrysene Fluonde Dibenz (a,h) acridme Sulfide Dibenz (a,b) anthracene pH Di-n-butyl phthalate 1 Specific Conductance Dichlorobenzenes 1 Total Dissolved Solids Diediyl phthalate Oil and Grease Di-n-octyl phthalate Fluoranthene Metals Indene Methyl chrysene Antimony 1 -Methyln^bthalene Arsenic N^hthalene Barium Phenanthrene Beryllium Pyrene Cadnuum Pyridme Chromium Qumolme 1 Cobalt 1 Lead Volatile Organic.*: 1 Mercury Nickel Benzene Selemum Carbon disulfide Vanadium Chlorobenzene Chloroform Acid Oreanics 1,2-Dibromoethane 1,2-Dichloroethane Benzenethiol 1,4-Dioxane Cresols' Methyl ediyl ketone 2,4-<limethyIphenol Styrene 2,4-Dmitrophenol Ediyl benzene 4-Nitrophenol Toluene Phenol Xylenes* 1) Reported as ortho-, meta-, and para- isomers 42 RE ^l^ROWSe\o)lmr^B\mclBe\SWMU( lbl\2 24-M\>iikf TABLE 9 CHEVRON CME CHEVRON REFINERY GROUNDWATER MONITORING HISTORY Date Activity February 1980 Complete Phase I Hydrogeologic and RCRA Penmttmg Studies report November 12, 1980 Submit Part A implication May - November 1981 Install 18 momtormg wdls February 1982 Complete Phase n Hydrogeologic and RCRA Penmttmg Studies r^rt February 1982 Sample five momtormg wells February - March 1984 Install 30 momtormg wells May 23, 1984 Consent order was signed Chevron agreed to • Close several waste management umts • Conduct waste site characterization mvestigation • Conduct a groundwater - quality assessment • Develop conceptual closure - plans for hazardous waste management umts • Conduct groundwater momtormg July 1984 Conduct groundwater sampling August 1984 Conduct groundwater samplmg September 1984 Conduct groundwater samplmg October 1984 Conduct groundwater samplmg November 1984 Install three de^ momtormg wells January 1985 Conduct groundwater samplmg February 1985 Complete Groundwater Quality Assessment and Waste Site Characterization Rq)orts 1985 Submit conceptual closure plans March 7, 1985 Submit petition for establishment of groundwater protection alternative concentration Iinut April - May 1985 Conduct groundwater samplmg August, 1986 EPA conducts CME & CFI mspection October - November 1985 Conduct groundwater samplmg November 7, 1985 Submit closure plans for API Separator Sludge Pit, TEL Weathermg Area and Hazardous Waste Landfill April - May 1986 Conduct semi-annual groundwater momtormg October - November 1986 Conduct semi-annual groundwater momtormg April - May 1987 Conduct semi-annual groundwater momtormg 43 RB.312-MI8aS6\ch«rnii\ravome\SWMU9 tbI\2-24-M\iiikf TABLE 9 (Continued) CHEVRON CME CHEVRON REFINERY GROUNDWATER MONITORING HISTORY Date Activity October - November 1987 Conduct senu-annual groundwater momtormg April - May 1988 Conduct semi-annual groundwater momtormg October - November 1988 Conduct semi-annual groundwater momtormg April - May 1989 Conduct semi-annual groundwater momtormg October - November 1989 Conduct semi-annual groundwater momtormg April - May 1990 Conduct semi-annual groundwater momtormg October - November 1990 Conduct semi-annual groundwater momtormg March 1991 Consent Order signed Chevron agreed to j • Investigate 48 SWMUs • Close 6 RCRA umts • Conduct an RFI • Prepare a conective action plan • Conduct mterun corrective measures • Contmue groundwater momtormg April - May 1991 Conduct semi-annual groundwater momtormg October 1991 Submit RFI work plan October 1991 Submit closure plans for reservoir, storm surge pond, baffie board pond, API s^arator pit, landfarm, landfarm storage frea, TEL weath^mg area and hazardous waste landfill October - November 1991 Conduct semi-annual groundwater momtormg April - May 1992 Conduct semi-annual groundwater momtormg October - November 1992 (Conduct semi-annual groundwater momtormg February 1993 Closure plans for reservou', waste management area, and hazardous waste landfill approved by DSHW April - May 1993 Conduct semi-annual groundwater momtormg September 1993 Closure plans for TEH weathering area, landfarm and landfarm storage area approved by DSHW October - November 1993 Conduct semi-annual groundwater momtormg 44 RE.31MtOIOS6\clm«aWreBe\SWMU9 (bI^^^4-9«\Inkf TABLE 10 CHEVRON CME CHEVRON NORTH TANK FARM GROUNDWATER MONITORING HISTORY Date AcQvitf December 1989 Complete sod - gas survey Elevated levels of orgamc v^rs detected m sods November 1989 - May 1990 Ckmduct hydrogeologic mvestigation Install 3 momtormg wells, 23 piezometers <did 3 auger holes June 1990 Submit hydrogeologic reconnaissance report Fall 1990 Conduct hydrogeologic mvestigation Install 7 momtormg wells, 40 piezometers, 10 auger holes and conduct a sod-gas survey Aprd 1991 Notify State of Utah that Chevron mtends to characterize the groundwater m the Northwest portion of the refinery Propose mstallmg 40 piezometers and 9 momtormg wells, data wdl be mcorporated mto RFI August 1991 Complete Phase n North Tank Farm Investigation report 45 RB.312-ltOSa56\aMnmBVm«MVSWMUIO «n2-24-9«Viiikf Momtormg wells S-35 and D-35 were designated as upgradient momtormg wells, and momtormg wdls S-l/D-1, S-2/D-2, S-lO/D-10, S-ll/D-11, and S-24 were designated as downgradient monitoring wells and delmeated pomts of compliance Chevron was required to draionstrate Aat momtormg wells S-4/D-4 and S-5/D-5 were not affected by refinery contammation and are representative of background conditions As previously stated, the statistical analysis revealed differences m morgamc paramtters m the three background momtoring wdls Section 6 1 and 6 2 sununanze the analytical results of 19 samplmg events from sprmg 1984 through 1993 This mcludes 17 semiannual samplmg events (sprmg and fall) from 1985 through sprmg 1983 and two of four samplmg events from 1984 (sprmg and fall) These sections predommantly discuss orgamcs, metals, and other parameters stated to be mdicative of refinery impacts m shallow and deep monitoring wells Major ions were analyzed mcludmg calcium (Ca), sodium (Na), magnesiiun (Mg), potassium (K), and bicarbonate However, these analytes are not discussed below A major portion of the site has been covered by salme waters of die Great Salt Lake m the past 100 years Shallow groundwater is highly salme and contams high amounts of TDS Also, many changes m ion concentrations across the site from east to west are attributed by Chevron to natural geocbenucal processes Therefore, Chevron states that assessment of these major ions may be meffective m evaluatmg the shallow groundwater impacts from refinery operations Appendix C presents analytical results from all consent order sampling events Sections 6 3 and 6 4 discuss results from samplmg at momtormg wells withm the NTF area and the three Od Dram locations, respectively 6 1 SHALLOW MONHORING WELLS Eight shallow momtormg wdls (S-l, S-2, S-4, S-5, S-10, S-l I, S-24, S-35) were sdected for sampling as part of Chevron's consent order The followmg summarizes analytical data collected from shallow momtoring wells from 1984 through 1993 samplmg events Two of the shallow momtormg wells were r^laced durmg the po'iod of consent order samplmg Monitoring well S-2 was rqilaced by momtormg well S-2A m August 1988 due to deterioratmg hydraulic performance Momtoring well S-2A was drdled to 15 feet bgs and located approxunately 6 feet south of momtormg well S-2 Momtormg well S-4 was also apparently r^laced by momtormg well S-4A The reason for this monitoring well rq)lacement is not known 46 ItB. 312-ltO«aSfiWhe>vnBWmn.em>\2-Z3-M\<fcr In May 1988, momtormg wells S-l and S-24 raierged from 1 to 2 years of mundation by ponded water The effects of this mundation on analytical results, or a discussion of samplmg procedures used when the momtormg wells were mundated, is not presented m the consent order samplmg reports 611 Orgamcs Several organic compounds were frequently detected m three shallow momtormg wells S-2, S-10, S-11, and S-35 These momtormg wells were designated as compliance pomt momtormg wells and are downgradient of refinery operations Tables 11, 12, 13, and 14 summarize analytical results for selected compounds from momtoring wdls S-2, S-10, S-11, and S-35 respectivdy Benzene is the most predommant volatde orgamc detected m momtormg wells S-2, S-10, and S-l 1 In momtormg well S-2, benzene is detected m 12 of 19 samplmg events from 1984 tiirough 1993 However, m the seven samplmg events where benzene was not detected, the detection linuts for benzene were higher than the average detected concentration of benzene Benzene concentrations range from a mimmum of 34 0 microgram per liter (jigfL) (sprmg 1993) to a maxmmm of 110 0 fig/L (spring 1984) Benzene appears to be decreasmg over tune m momtormg well S-2 In momtormg well S-10, benzene levels appear to have decreased m the last 5 years from a maximum of 44 /tg/L in fall 1987 to between 2 to 3 /tg/L m die spring of 1993 Mon '->rmg well S-U showed a slight increase m benzene levels m the last six samplmg events From 1984 to sprmg 1990, benzene concentrations ranged from below detection lumts to 8 0 /ig/L Smce fall 1990, tiie benzene concentration ranges from 8 7 to 11 7 ng/L Benzenethiol, another organic compound mdicative of refinery operations, was detected m momtormg wells S-2, S-10, and S-U Benzenethiol was detected most frequently m momtormg well S-U and concentrations range from below detection lunits to 170 /tg/L m a sample collected m sprmg 1984 In the most recent samplmg event, sprmg 1993, benzenethiol was detected at 100 /tg/L m momtormg well S-U Benzenethiol has been detected m momtormg well S-10 m concentrations rangmg from below detection lunit to a maximum of 560 /ig/L m sample collected m the fall 1984 samplmg event Benzenethiol has been detected 2 out of the U tunes it has been analyzed for in well S-2, 5,000 ftgfL m the sprmg of 1992, and 630 /ig/L and m the sprmg of 1993 47 RE. 312-ROI09fiWhMnB\nvnim.eBeV2-2344\ri[r TABLE 11 CHEVRON CME MONITORING WELL S-2/S-2A SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spring Fall Spnng Fall Spnng Fall Spnng Fail Spnng Fall Spnng Fall Spnng FaU Spni^ Fall ^nng Fall Spnng 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 1992 1993 Maior Ions (mz/L) Bicarbonate (HCOj) ND 37 8 ND ND ND ND ND ND ND ND ND ND 94 4 ND 0 1 * * ND Calcium (Ca) 469 0 440 0 520 0 547 0 601 0 560 0 470 0 450 0 460 0 380 0 470 0 450 0 438 0 440 0 48 1 620 322 540 327 Flounde (F) ND 084 0 30 0 40 0 20 ND 0 20 0 30 0 10 0 10 0 30 0 20 0 15 022 49 1 72 3 47 8 22 8 122 Magnesium (Mg) 2470 0 1400 0 3300 0 1710 0 3580 0 2480 0 4010 0 2310 0 2570 0 3250 0 4280 0 3540 0 4320 0 3430 0 4180 3605 2420 2700 3390 Potassium (K) 175 0 100 0 160 0 112 0 151 0 170 0 280 0 220 0 310 0 220 0 260 0 250 0 263 0 177 0 252 178 93 146 170 Sodium (Na) 2070 0 1400 0 1900 0 1510 0 1710 0 1660 0 1880 0 1470 0 1460 0 1380 0 1590 0 1620 0 1590 0 1530 0 4620 1565 3400 1400 983 Mmor Ions (me/L) Orgamc Nitrogen (as N) 51 0 32 0 39 0 21 0 30 3 29 0 ND ND 83 0 132 0 63 0 92 0 138 0 111 0 * * ••> * * Ammonia (as N) 17 0 17 0 19 0 24 0 24 0 20 0 33 0 35 0 37 0 26 0 27 0 19 0 19 5 244 * * * * * Field Measurements Field pH 4 58 4 81 440 4 84 4 45 4 47 3 97 3 99 3 93 4 13 ' 3 48 3 82 4 16 402 425 4 74 5 11 5 36 3 91 Trace Metals (mg/L) Arsemc (As) ~ 0 10 0 13 0 37 0 90 03 0 08 0 8 004 ND ND ND ND ND 0 52 2 1 ND 0 034 ND 0 219 Banum (Ba) 0 08 ND ND ND ND ND 0 07 ND ND ND ND ND 0 11 0 31 0 18 ND 0 032 ND 0 015 Cadmium (Cd) ND ND 0 70 ND 0 04 ND ND ND ND ND ND ND ND ND 002 0 41 0 303 0 12 0 87 Chromium Hex (Cr-I-6) ND ND ND ND ND ND ND ND ND ND ND ND ND ND * * * * * Total Chromium (Cr) 0 290 0 220 1 3 0 19 1 8 1 0 46 20 45 22 29 1 1 3 1 1 1 1 42 0 68 0 148 0 119 2 21 Lead (Pb) ND ND 0 51 ND ND ND 0 11 ND ND ND ND ND ND ND ND 0 28 0 124 0 098 ND Manganese (Mn) 26 0 14 0 440 19 0 48 0 28 0 58 0 32 0 60 0 440 65 0 440 62 9 36 2 * * * * * Mercury (Hg) ND ND ND ND ND ND ND ND ND 0007 ND ND ND ND ND ND ND ND ND Nickd (Ni) 0 45 0 27 1 3 0 53 1 6 1 0 22 1 2 24 1 5 22 1 3 22 1 2 1 62 1 14 0 602 0 658 1 91 Selemum (Se) ND ND ND ND ND ND 0 072 ND ND ND ND ND ND ND 025 0 20 0 183 ND ND Silver (Ag) ND ND ND ND 05 ND ND ND ND ND ND ND ND ND * * * * * Vanadium (V) 0 110 004 0 30 0 10 0 36 0 16 0 53 0 30 040 0 320 040 0 30 0 48 0 18 0 27 0 34 0 099 0 19 0 518 Zmc (Zn) 0 25 ND 0 060 0 060 0 23 0 11 0 07 0 22 0 10 ND ND 0 10 ND 0 071 0 22 * 0 147 0 084 0 272 48 RE 312 R080S6\dinrraa\SEMUlS tbl\2-24-94\iiikf TABLE 11 (Continued) CHEVRON CME MONITORING WELL S-2/S-2A SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng Fall Spnng Fall Spring Fall Spring Fall Sprmg Fall Spnng Fall Spnng Fall Spnng Fall Spm^ Fall Spnng 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 1992 1993 Other Parameters Oil & Grease (mg/L) 38 0 21 0 64 0 49 0 23 0 362 0 ND 54 0 75 0 7 0 45 0 21 0 32 7 16 5 111 0 1,250 97 0 62 0 76 4 TOC (mg/L) 1,300 980 0 1,600 1,300 1,400 1,480 2,000 1,970 1,600 1,600 2,270 2,420 1,830 1,840 * * * * TOX (MgCUL) 680 0 660 0 49 0 680 0 570 0 169 0 59 0 31 0 8,700 181 0 270 0 50 0 821 0 68 2 * * * * * Oreamc Tompounds Volatiles (ue/L) Benzoie 110 0 80 0 ND 98 0 63 0 78 0 78 0 460 ND ND ND ND ND ND 400 28 1 440 440 34 0 Toluene ND 20 0 ND ND ND ND ND ND ND ND ND ND ND ND 57 0 ND ND ND ND Acid Compounds (mg/L) o-Cresol 92 0 100 0 49 0 48 0 39 0 49 0 56 0 81 0 74 0 78 0 93 0 100 0 89 0 67 0 71 3 74 7 18 5 ND 16 1 m-fp-Cresol 360 0 240 0 150 0 140 0 110 0 180 0 150 0 190 0 200 0 230 0 260 0 320 0 250 0 170 0 16jO 94 2 41 2 ND 35 9 Phaiol 110 0 100 0 120 0 68 0 71 0 990 97 0 140 0 170 0 110 0 160 0 240 0 190 0 150 0 136 0 153 0 45 1 41 7 22 9 Other Detected Oreamcs (^e/L) Acetone 7,800 4,200 4,800 1,800 5,200 5,600 4,900 3,500 6,600 ND 4,100 5,000 660 0 3,500 * * * * * Amlme 1,400 ND 2,800 1,100 ND ND ND ND ND 5,700 12,000 ND ND ND * * * * * Boizenethiol (4) ND ND ND ND ND ND * * * * * * * >•> ND ND 5,000 ND 630 Bis(2-ethylhexyl)phalate ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 2-Butanone 1,200 ND 780 0 310 0 550 0 1,300 1,600 1,100 1,800 ND 1,400 1,500 ND 1,700 * * * * * 49 RE 31^RD8Q9fi^cllevIal\SEMU15 tblVZ 24-94\mkf TABLE 11 (Continued) CHEVRON CME MONITORING WELL S-2/S-2A SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng Fall Spnng Fall Spnng Fall Spnng Fall Spnng Fall Sprmg Fall Spnng Fall Sprmg Fall Spm^ Fall Sprmg 1984 1984 1985 1985 im 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 1992 1993 Other Detected Oreamcs (Cont'd) Carbon Disulfide 42 0 45 0 ND 46 0 400 ND 76 0 45 0 ND ND ND ND ND ND ND ND ND ND ND 2,4-Diinethylphenol 16,000 24,000 6,800 12,000 2,600 11,000 6,300 11,000 ND 10,000 13,000 ND 18,000 12,000 19,200 9,890 15,300 16,700 7,420 2-Hexanone 75 0 ND ND ND ND ND ND 54 0 ND ND ND ND ND ND * * * * * Methyl mercaptan ND ND ND ND ND ND ND 2,300 ND ND 2,900 2,800 >i> * * * * * * 1-Methylnaphthalene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 2,900 170 4-Methyl-2-pentanone 76 0 ND ND ND ND ND ND ND ND ND ND ND ND ND * * * * * Qumolme ND ND 5,100 ND ND ND ND ND ND ND ND ND ND ND 10,000 ND ND ND 3,600 Phenanthrene * >x * * 120 * * * * * * * 530 0 329 900 ND 286 Methyl ethyl ketone * * >ii * * * * • * 41 * * ND 2,330 ND 905 0 ND Key ND = Not detected • = Not analyzed TOC = Total Orgamc Carbon TOX = Total Orgamc Halogen mg/L = Milligrams per hter ftg/L = Micrograms per hter /tgCL/L = Micrograms of chlorme per hter 50 RE 312 RDWS6\disirnii\SEMU13 d>I\2-24-94\iiilcf TABLE 12 CHEVRON CME MONITORING WELL S-10 SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng Fall Spni^ Fall Spnng Fall Spnng Fall Spni^ Fall Spnng Fall Spnng FaU Spnng FaU Siwing FaU Sprii^ 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 1992 1993 Maior Ions (me/L) Bicarbonate (HCO3) 567 7 601 1 495 0 1261 9 643 8 705 9 680 3 714 5 668 1 784 0 508 4 626 7 645 0 620 6 522 487 * * 506 Calcium (Ca) 80 0 71 0 77 0 86 0 59 0 67 0 64 0 59 0 58 0 56 0 55 0 53 0 50 0 48 6 29 9 61 63 0 79 68 7 Fluonde (F) 5 7 5 4 4 8 43 3 60 44 4 1 44 3 9 3 4 3 8 3 8 40 3 6 3 29 3 55 3 31 3 5 3 5 Magnesium (Mg) 31 0 29 0 30 0 28 0 27 0 29 0 29 0 26 0 27 0 27 0 26 0 250 23 4 23 2 26 4 26 8 29 0 33 31 6 Potasium (K) 22 0 22 0 19 0 24 0 20 0 25 0 20 0 23 0 19 0 22 0 18 0 20 0 18 0 18 7 23 7 252 23 6 33 21 5 Sodium (Na) 467 0 448 0 440 0 468 0 475 0 510 0 500 0 476 0 497 0 475 0 420 0 416 0 430 0 398 0 505 430 387 417 376 Mmor Ions (ms/L) Orgamc Nitrogen (as N) 7 0 96 0 3 20 0 0 1 1 5 ND ND ND 1 0 ND 14 0 96 ND * * * * * Ammoma (as N) 17 0 24 0 18 0 14 0 26 5 30 0 250 28 0 27 0 29 0 21 0 27 0 20 0 259 * * * Field Measurements Field pH 7 36 7 41 7 64 7 65 7 94 7 62 7 66 7 58 7 65 7 61 J 88 7 55 7 92 7 84 7 85 7 59 7 83 7 61 7 52 Trace Metals (me/L) Arsemc (As) _ 0 63 0 005 0 05 0 10 040 0 37 0 54 0 044 ND 0 045 0 04 0 07 0 063 0 061 0 094 0 104 0 096 101 0 083 Banum (Ba) 0 13 0 16 0 14 0 17 0 16 0 19 0 19 0 17 0 17 0 18 0 15 0 15 0 13 0 14 0 194 0 184 0 149 169 0 151 Cadmium (Cd) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Chromium Hex (Cr-t-6) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Total Chromium (Cr) 0 009 0006 0 009 0 006 0 006 0 007 ND ND ND ND ND ND ND ND ND ND ND ND ND Lead(Pb) ND ND ND ND ND ND ND ND ND ND ND ND ND 0009 0 021 ND ND ND ND Manganese (Mn) 0 13 0 35 0 15 0 16 0 120 0 13 0 12 0 12 0 096 0 10 0 79 009 0 071 0 072 * * * * * Mercury (Hg) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Nickel (Ni) 0 13 0 20 0 20 0 023 0 020 002 ND ND ND ND ND ND ND ND ND 0 017 0 018 017 0 014 Selemum (Se) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Silver (Ag) ND ND ND 0 005 0 004 ND ND ND ND ND ND ND ND ND ••> * * * * Vanadium (V) ND ND ND ND 0 003 0 002 ND ND ND ND ND ND ND ND ND ND ND ND ND Zmc (ZN) ND ND ND ND 0 006 0 004 ND ND ND ND ND ND ND ND ND ND ND ND ND 51 RE 312 RMOSOduwnBVSWMUM Ilil\2 24-94\idrf TABLE 12 (Continued) CHEVRON CME MONITORING WELL S-10 SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng Fall Spnng Fall Spnng FaU Spnng Fall Spnng Fall Spnng FaU Spnng FaU Spnng Faa Spnng Fall Spnt^ 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 1992 1993 Other Parameters Oil and Grease (mg/L) 3 0 2 0 3 0 6 0 1 0 0 8 2 0 ND 20 ND 20 3 0 26 20 1 8 1 6 1 53 50 ND TOC (mg/L) 27 0 28 0 19 0 30 0 48 0 23 0 21 0 23 0 19 0 20 0 15 0 17 0 17 1 17 0 * • * * TOX (/tgCL/L) 45 0 69 0 160 0 16 0 65 0 154 0 140 0 88 0 140 0 36 0 48 0 130 0 115 0 60 4 * * * Volatiles (ue/L) Benzene 7 0 16 0 ND ND 19 0 23 0 38 0 440 26 0 27 0 5 3 ND 6 3 ND ND 2 1 ND ND 3 2 m-Xylene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Xylenes, Total ND ND ND ND ND ND ND ND ND ND ND ND 6 6 62 ND ND ND 5 8 9 1 Other Detected Orgamcs (fie/L) Acetone 59 0 ND 170 0 ND ND ND 180 0 ND ND ND ND ND ND ND * * * * • Benzenethiol (4) 640 560 0 36 0 ND ND ND * * 30 0 220 * 52 0 28 0 ND ND ND 20 0 50 0 Key ND = Not detected TOC = Total orgamc carbon TOX =_Total orgamc halogen * = Not analyzed mg/L = Milligrams per liter /ig/L = Micrograms per liter figCUh = Micrograms of chlorme per liter 52 RE 312 R080S«\cb<>vraa\SWMU16 tbl\2 24-94\nikf TABLE 13 CHEVRON CME MONITORING WELL S-U SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spni^ Fall Spnng Fall Spnng FaU Spnng FaU Spni% Fall Spnng Fall Spnng Fall Spru« FaU Spnng FaU Spnng 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 1992 1993 Maior Ions (mg/L) Bicarbonate (HCO3) 612 1 693 8 687 7 720 6 704 7 774 2 768 1 813 2 701 1 862 0 731 5 713 3 747 4 690 1 685 666 * 634 Calcium (Ca) 54 0 64 0 62 0 78 0 56 0 65 0 62 0 45 0 56 0 42 0 66 0 51 0 54 8 57 6 51 8 63 60 8 82 73 5 Fluonde (F) 35 3 0 3 2 3 4 24 24 25 26 26 2 3 3 0 29 23 2 3 2 4 2 49 2 35 2 54 2 52 Magnesium (Mg) 27 0 35 0 38 0 38 0 400 49 0 48 0 29 0 39 0 28 0 400 29 0 39 3 35 5 42 9 405 42 7 43 1 449 Potassium (K) 34 0 41 0 54 0 40 0 64 0 92 0 80 0 38 0 52 0 34 0 37 0 38 0 60 4 37 6 63 4 50 0 60 2 54 0 52 5 Sodium (Na) 458 0 620 0 840 0 594 0 929 0 1340 0 1200 0 432 0 765 0 396 0 618 0 418 0 878 0 371 0 721 370 532 350 551 Mmor Ions (me/L) Orgamc Nitrogm (as N) 50 ND 20 5 0 ND 1 8 86 20 ND ND ND ND 14 1 ND * * * * * Ammoma (as N) 16 0 22 0 12 0 22 0 17 6 15 0 6 4 250 20 0 24 0 19 0 26 0 16 4 29 4 * * * * * Field Measurements Field pH 7 62 7 67 7 89 7 73 8 01 7 75 7 73 7 71 7 74 7 69 7 80 7 72 7 81 7 85 7 86 7 79 7 72 7 63 7 75 Trace Metals (me/L) Arseaic (As) 084 0 051 0 074 006 0 47 0 033 0 066 0 053 0 040 0 083 0 068 0 011 0 082 0 062 0 094 0 107 0 097 0 062 0 110 Banum (Ba) 0 12 0 15 0 077 0 19 0 08 0 087 009 0 18 0 13 0 18 0 24 0 18 0 21 0 24 0 304 0 268 0 192 0 136 0 229 Cadmium (Cd) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Chromium Hex (Cr-I-6) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Total Chromium (Cr) 0 013 0 007 0 014 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Lead(Pb) ND ND ND ND ND ND ND ND ND ND ND ND ND 0 009 0 013 ND ND ND ND Manganese (Mn) 0 14 0 13 0 11 0 13 0 094 0 079 0 08 0 10 0 081 0 08 0 10 0 080 0 077 0 086 * * * * * Mercury (Hg) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Nickd (Ni) 0 025 0 024 0 02 0 02 0 02 0 02 ND ND ND ND ND ND ND ND ND 0 014 ND 0 01 ND Selemum (Se) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0 004 ND ND Silver (Ag) ND ND ND ND ND ND ND ND ND ND ND ND ND ND i*> * * •» Vanadium (V) 0004 ND ND ND ND 0 004 ND ND ND ND ND ND ND ND ND ND ND ND ND Zmc (ZN) ND ND 0 006 0 024 0 013 0 016 ND ND ND ND ND ND ND ND ND ND ND ND ND 53 RE.312 R080S6\CHEVRON\SWMU17 d>l\2 24-94\niJcf TABLE 13 (Continued) CHEVRON CME MONITORING WELL S-U SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng FaU Spnng FaU Spni^ FaU Spnng FaU Spni^ Fall Spnng Fall Spnng Fall I Spnng FaU Siwing Fall Spnng 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1 1991 1991 1992 1992 1993 Other Parameters Oil and Grease (mg/L) 3 0 1 0 1 0 54 ND ND ND ND 1 0 1 0 20 40 ND 17 6 25 2 3 ND ND ND TPC (mg/L) 20 0 20 0 17 0 21 0 24 0 15 0 14 0 18 0 17 0 15 0 14 0 14 0 13 1 13 6 * * * * TOX (/tgCL/L) 69 0 70 0 46 0 42 0 61 0 135 0 66 0 55 0 110 0 13 0 65 0 60 0 197 0 77 2 * * * * Volatiles (ue/L) Benzene 6 0 6 0 ND ND 5 0 ND 6 7 80 5 7 77 ND ND 7 3 11 0 ND 10 6 9 2 87 11 7 Toluene ND 5 0 ND ND ND ND 52 ND ND ND ND ND ND ND ND ND ND ND ND o,p-Xylene ND ND ND ND ND ND 5 6 5 2 ND * >x * • ND ND ND ND ND Xylenes, Total ND ND ND ND * * * * * ND ND ND 66 90 ND ND ND 64 92 Acid Compounds (me/L.) o-CresoI ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0 0058 m-t-p-Cresol ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0 0051 Phenol ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Other Detected Oreamcs (ue/L) Acetone 120 0 66 0 23 0 65 0 ND 170 0 600 0 140 0 ND ND ND ND ND ND * * * * Benzenethiol (4) 170 0 130 0 400 26 0 ND ND 63 0 56 0 * 74 0 48 0 15 0 54 0 13 0 ND ND ND ND 100 0 Bis(2-ethyUiexyl)phthalate ND 58 0 ND ND ND ND ND ND ND ND ND ND ND 23 0 ND ND ND ND ND Dichloromethane ND ND ND ND ND ND ND ND ND ND ND 89 ND ND * * * Methyl mercaptan ND ND ND ND ND ND ND ND ND ND 51 0 ND * * * * * * 1-Methylnaphthalene 18 0 80 7 0 7 0 7 0 70 ND ND ND ND ND ND * ND ND ND ND ND Pentachlorophenol ND 7 0 ND ND ND ND ND ND ND ND ND ND ND ND * * * Key ND * TOC TOX = Not detected mg/L = Not analyzed MS^ = Total orgamc Carbon ngCL/L = Total Orgamc Halogen Milbgrams per hter Micrograms per liter Micrograms of chlorme per hter 54 RE 312 R080S6VCHEVRON\SWMU17 tbl\2 24-94\inkf TABLE 14 CHEVRON CME MONITORING WELL S-35 SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng FaU Spnng FaU Spnng FaU Spnng FaU Spnng FaU Spni^ FaU Spnng FaU Spni^ FaU Spnng Fail Spnng 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990 1991 1991 1992 j 1992 1993 Maior Ions (me/L) Bicarbonate (HC03) 471 8 392 6 404 8 403 6 469 4 309 7 431 6 438 9 415 8 442 6 415 8 356 0 410 9 395 0 427 425 * 475 Calcium (Ca) 187 0 141 0 130 0 114 0 106 0 120 0 114 0 101 0 114 0 108 0 122 0 97 0 119 0 112 0 98 2 107 113 144 109 Flounde (F) 0 14 0 58 0 60 0 50 0 60 0 40 0 60 0 50 0 50 0 50 0 60 0 60 0 55 0 37 0 49 064 0 99 0 59 0 54 Magnesium (Mg) 79 0 66 0 61 0 50 0 54 0 55 0 57 0 460 54 0 53 0 58 0 48 0 61 4 56 7 51 6 55 5 49 3 56 8 52 6 Potassium (K) 15 0 16 0 15 0 14 0 14 0 14 0 13 0 14 0 13 0 14 0 14 0 14 0 16 0 15 3 14 9 17 4 18 2 20 0 13 9 Sodium (Na) 233 0 200 0 210 0 164 0 197 0 170 0 173 0 148 0 170 0 173 0 186 0 183 0 197 0 179 0 188 167 148 159 160 Mmor Ions (me/L) Nitrate-l-Nitnte (as N) 90 75 5 0 24 56 3 8 46 29 10 0 3 9 44 7 1 5 7 36 29 6 8 66 13 2 10 9 Orgamc Nitrogen (as N) * 0 1 04 03 1 0 ND 0 8 ND ND ND 20 ND ND ND * * « * Ammoma (as N) ND ND ND 0 1 ND ND ND ND ND ND ND ND ND ND * * * * Total Cyamde ND ND ND ND ND ND ND ND ND ND ND 0 01 ND ND * * * * Field Measurements Field pH 7 09 7 32 7 12 7 23 7 50 7 27 7 29 7 28 7 24 6 98 7 32 7 31 7 30 7 26 7 28 7 51 7 29 7 1 1 A3 Trace Metals (me/L) Ars^c (As) 0 006 0 003 0 005 0 004 0 005 0 004 0 004 0 004 ND ND ND ND ND ND ND ND ND ND ND Banum (Ba) 0 040 0 028 0 026 0 022 0 026 0 023 0 024 0 027 0 029 0 033 0 032 0 040 0 048 0 045 0 062 0 055 0 042 0 05 0 049 Cadmium (Cd) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Total Chromium (Cr) 0 006 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND * Chromium Hex (Cr-P6) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Lead (Pb) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Manganese (Mn) ND ND ND ND 0 008 ND ND ND ND ND ND ND ND ND * * * * ND Mercury (Hg) ND 0 0003 ND ND ND ND ND ND ND ND 0 0002 ND ND ND ND ND ND ND * Nickd (Ni) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Selemum (Se) ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Silver (Ag) ND ND ND ND 0 003 ND ND ND ND ND ND ND ND ND * * * ND Vanadium (V) 0 004 ND ND ND 0 003 0 004 ND ND ND ND ND ND ND ND ND ND ND ND ND Zmc (Za) 0 007 ND ND 0 030 ND 0 012 ND ND ND ND ND ND ND ND 0 03 ND ND ND Other Parameters Oil & Grease (mg/L) ND ND ND 20 ND ND ND ND ND ND 1 0 20 2 8 1 1 ND ND 0 82 ND ND TOC (mg/L) 26 3 4 25 22 6 3 1 5 1 6 1 4 2 3 1 2 1 5 1 6 2 2 29 * * * * * TOX (/igcL/L) 29 0 19 0 15 0 21 0 50 37 0 32 0 15 0 15 0 22 0 36 0 70 0 30 0 ND * * * * 55 TABLE 14 (Continued) CHEVRON CME MONITORING WELL S-35 SUMMARY OF CONSENT ORDER GROUNDWATER SAMPLING 1984-1993 Spnng 1984 Fall 1984 Spnng 1985 FaU 1985 Spnng 1986 Fall 1986 Spni^ 1987 Fall 1987 Sprmg 1988 Fall 1988 Spnng 1989 FaU 1989 Spnng 1990 Fall 1990 Spnng 1991 Fan 1991 Fall 1992 Spniu 1993 Orgamc Comnoimds Volatiles (ue/L) Benzene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Toluene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Acid Compounds (m^fVi O-Cresol ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND m-t-p-Cresol ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Phoiol ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Other Detected Orgamcs (ue/L) Acetone ND 24 0 17 0 ND ND ND 880 0 ND ND ND ND ND ND ND * * * * Bis(2-ediyUiexyl) 20 0 100 0 ND 38 0 ND ND ND ND 7 8 ND ND ND ND ND * * * * * phalate Dichloromethane ND ND ND ND ND ND ND ND ND ND ND ND ND 7 3 * * * * * Key ND — Not detected * = Not analyzed TOC = Total Orgamc Carbon TOX = Total Orgamc Halogen mg/L = Milhgrams per hter /ig/L = Micrograms per hter figCL/L = Micrograms of chlorme per hter 56 Acid orgamcs mcludmg o-cresol, m+p-cresol, and phenol were detected m all but two samples collected from momtormg well S-2 (Concentrations of all three compounds have decreased steaddy m the last seven samplmg events from maximtun values r^rted m fall 1989 No acid orgamcs were detected m any other shallow momtormg well exc^t for momtormg wdl S-U In sprmg 1993, o-cresol and m-i-p-cresol were detected m momtormg well S-U at 5 8 ngfL and 5 1 ngfL, respectively Three orgamc compounds, acetone, bis(2-ethylhexyl)phthalate and di-n-octylphthalate, have been detected at various samplmg events smce 1984 In several semiannual samplmg r^rts, Chevron states that these compounds are wdl known sampling and/or laboratory contammants Chevron stated that acetone levels were most likely due to contammation during samplmg smce acetone was used for decontanunation Bis(2-ethylhexyl)phthalate and di-n-octylphthalate are commonly used as plasticizers m materials mcludmg PVC and teflon and are not related to petroleum refinmg operations (Dames & Moore 1985a) Frequent occurrences of moderate-to-high levels of acetone m most groundwater samples led Chevron to pursue different samplmg and decontanunation procedures Begmmng with the sprmg 1987 sampling event, acetone was elimmated from decontanunation procedures In samplmg events smce that time, acetone levels have declined m most momtormg wells and the frequency of detection has become more sporadic Monitoring well S-2, however, has contmued to display moderatt o-high concentrations of acetone Chevron concluded that acetone detected m momtormg well S-2 was the result of anaerobic degradation of refinery orgamcs and not due to laboratory or samplmg contammation (Dames & Moore 1987) Concentrations of acetone m momtormg wdl S-2 from 1984 through fall 1990 range from a mimmum of 660 ng/L (spring 1990) to a maxunum of 7,800 /tg/L (sprmg 1984) Acetone was not mcluded as an analyte from the sprmg 1991 samplmg event to the present This analyte apparently was elimmated from the analytical program In the sprmg 1987 samplmg event, 66 ng/L trichlorethylene (TCE) was detected m momtormg well S-2 This IS the only detection of TCE m any solid, aqueous, or od phase sample collected from the refinery The quality control blank for this sample also contained TCE Chevron stated that the detection of TCE was the result of laboratory contammation (Dames & Moore 1987) 57 >E- 313-R0«l3«W)wnai\iwicia.cma\2-Z344\itr Other orgamc compounds detected m shallow momtormg wells mclude amlme, diloroform, tohxene, xylenes, 2-Butanone, carbon disulfide, didiloromediane, methyl mercaptan, 2,4-Dunethylphenol, 2-hexanone, 4-Methyl-2-pentanone, pentachlorophenol, phenandirene, qumolme, methyl ethyl ketone, and 1-methylnaphthalene Most occurrences of these compounds m shallow momtormg wdls are sporadic Appendu C presents all analytical results 6 12 Metals Most consent order metal analytes were detected m all shallow refinery momtormg wells, mcludmg upgradient momtormg wells As with orgamcs, metals were detected m higher concentrations, and more frequently m momtormg wells S-2, S-10, and S-U Momtormg well S-2 m particular showed higher levels of arsemc (As), cadmium (Cd), chromium (Cr), manganese (Mn), mckel (Ni), vanadium (Va), and zinc (Zn) than all other shallow momtoring wells Compliance pomt momtormg wells S-10 and S-l 1 also displayed higher metals values than upgradient momtormg wdls EPA primary drmkmg water standards (EPA 1990) are frequendy exceeded for specific metals m momtormg wells S-2, S-10, and S-U Momtormg well S-2 displays the highest values of metals and exceeds drmkmg water standards more frequently than wells S-10 and S-U Two upgradient momtormg wells, S-4 and S-S, also showed values of As and Se above prunary drinking water standards Detection limits for Se and Cd, however, often exceed the prunary drinking water standard for these analytes Analytical results for metals detected m momtormg wells S-2, S-10, S-U, and S-35 are presented m Tables 11, 12, 13, and 14, respectively Analytical results for all metal analytes appear m Appendix C 613 Other Parameters Dames & Moore (1985) found several other parameters (fluoride, total orgamc carbon [TCX;], ammoma, organic mtrogen, pH, and od and grease), which indicate refinery groundwater impacts (Dames & Moore 1985a) This section discusses the presence of these parameters m die consent order shallow momtormg wells 5g Ra 312-R0S09(ncht>ma\i«ncn clB•\^2344\Ikr Refinery impacts are not apparent m comparmg fluoride values upgradient and downgradient of the refinery The majority of the shallow momtormg wells have sumlar fluonde values throughout the samplmg period Momtormg wells S-l, S-4, S-5, S-10, S-U, S-24, and S-35 contamed from 0 14 to 6 0 mdligram per liter (mg/L) fluoride Some of the lowest fluoride values were detected m monitoring well S-2 and ranged from 0 1 to 0 84 mg/L (1984 dm>ugh 1990 sampling events) In 1991, however, fluoride values m momtormg well S-2 mcrease sigmficantly and ranged from 49 1 mg/L m spring 1991 to a maximum of 122 mg/L m the most recent samplmg event (sprmg 1993) TOC, ammoma, and orgamc mtrogen were mcluded as analytical parameters only from 1984 tiirough fall 1990 As with other analytes (organics and metals) previously discussed, momtormg well S-2 displays sigmficantly higher values of TOC and orgamc mtrogen than the other compliance pomt monitoring wells (S-l, S-10, S-U, S-24) Ammoma concentrations are sumlar for all compliance point momtoring wells, however, ammoma levels m these momtormg wells are approxunately 10 tunes the levels in upgradient monitoring wells S-4, S-5, and S-35 With the exception of momtormg well S-2, pH values are consistently m the nwtral range for all ; events The pH m monitoring well S-2 ranges from a minimum of 3 48 to a maxunum of the duration of the samnlm? nerind sampling events Tbe pH m monitoring well 5 11 for the duration of the sampling period Oil and grease values range from 7 0 mg/L (fall 1998) to 1,250 mg/L (fall 1991) in momtormg well S-2 The most recent sampling event showed an od and grease concentration of 76 4 mg/L Od and grease concentrations are significantly less m all other shallow momtormg wells sampled Concentrations of od and grease ranged from nondetect to 6 0 mg/L m momtormg well S-10 and from nondetect to 17 6 mg/L m monitoring well S-U 6 2 DEEP MONIFORING WELLS Seven deep momtoring wells (D-l, D-2, D-4, D-5, D-10, D-U, and D-35) were selected for sampling as part of Chevron's consent order The followmg sections discuss orgamcs and metals analytical results Appendix C presents all analytical results for deq) momtormg wells 6 2 1 Organics No organic compounds were detected in any de^ momtormg wells sampled from sprmg 1984 through spring 1989, except for sporadic occurrences of acetone, bis(2-ethylhexyl)phthalate, and di-n-octylphthalate These compounds have been attributed by Chevron to be possible lab or samplmg contammants 59 312-]U)nS6\chm«BVi«irrem.e«M\3-23-M\ifa' In three sampling events, (fall 1989, sprmg 1990, and fall 1990) sevo'al orgamc compounds were detected m upgradient momtormg wells D-5 and D-35 and compliance pomt (downgradient) momtormg wells D-l and D-10 Table 15 presents a list of momtormg wells m which orgamc analytes were detected, the samplmg event, and the concentration From sprmg 1991 to sprmg 1993, no orgamc compounds were detected m any deep momtormg wdls 6J. 2 Mdals Several metal analytes have been detected m de^ momtormg wdls sampled as part of Chevron's consent orders In general, concentrations of metals detected m all deep momtormg wdls are lower than concentrations in shallow monitoring wells For example, the As values detected m shallow monitoring well S-l are 10 times higher than the As concentration from momtormg weU D-l The same is true for deep momtormg well D-2 when compared to shallow momtormg wdl S-2 The most frequently detected analytes m deep momtormg wells are barium (Ba) and manganese (Mn) Silver (Ag), As, Cr, Pb, Se, and Zn have been detected m all de^ momtormg wells, mainly m low concentrations at or near the detection Imut Momtormg well D-5 is the only deep momtormg well m which the prunary drmkmg water standard was exceeded In the sprmg 1987 samplmg event, 0 03 mg/L Se was ddected m this monitoring well 6 2 3 Other Parameters Refinery impacts are not i^parent in comparmg ammonia values upgradient and downgradient of the refinery The majority of the momtormg wells have sumlar ammoma values throughout the samplmg period Momtormg wells D-4, D-5, D-U, and D-35 contain ammoma values from 6 3 mg/L to below the detection lunit Throughout the entu'e samplmg period, momtormg wells D-l, D-2, and D-10 contamed slightly higher values of ammoma They ranged firom 16 7 mg/L m sprmg 1986 to 2 3 mg/L m sprmg 1988 The values for these three wells have remamed fairly consistent over the sampling period In addition, the impacts of the refinery are not ^parent when the TOC values are compared between the upgradient and downgradient wells The TOC values are approximately 5 to 10 tunes higher m momtormg wells D-l, D-2, D-10, and D-U when compared to the upgradient well, D-35 These TOC values, however, are stdl very low The lowest TOC values are found m momtormg wells D-4 and D-5 Values m momtormg well D-5 range from 3 8 mg/L to bdow the detection limit In monitoring well D-5, TOC was only detected three tunes (0 1 mg/L) durmg the entire samplmg period 60 *B. 312-R0a09«Wh»naB\ravnn.ciBe\2-2344\Ar TABLE 15 CHEVRON CME SUMMARY OF ORGANIC COMPOUNDS* DETECTED IN DEEP WELLS (1984-1993) Analyte Sampling Ev«it WeU Number Cmiceijdlrstimi Oitg/L) Chloroform Fall 1989 D-10 51 0 Dichlormethane Fall 1989 D-l 11 0 Fall 1990 D-35 8 1 Trichlorofluoromethane Fall 1989 D-5 14 0 2-Butanone Fall 1990 D-l 640 2-Hexanone Fall 1990 D-l 54 0 Key * = Acetone, bis(2-etbyUiexyl)phtbalate, and di-n-octylphthalate not mcluded /ig/L = Micrograms per liter 61 RB. ^l^ROnSe^(Waa\nvcn•\SWMUlS AIV ^34-«4\IIlkf Lastly, refinery impacts are not readdy apparent when comparmg downgradient total orgamc halogen (TOX) values to the upgradient TOX values From sprmg 1984 to fall 1985, TOX values remam low and stable for all momtormg wells Begmmng m sprmg 1986 tiux)ugh sprutg 1989, the TOX values fluctuate and are very mconsistent The maxunum TOX value was 140 /tgCl/L from momtormg well D-4 However, startmg m fall 1989 diese values tend to decrease rapidly,and m most instances are below the detection lunit Based on the values of TOX presented, diere is the possibdity of a v^ low unpad of the refinery to the groundwater from ^proximately sprmg 1986 to sprmg 1989 However, as the data mdicate, there is no recent impact to die groundwater 63 NORTH TANK FARM Chevron conducted a separate assessment of groundwater quality beneath the NTF area of tbe refmery durmg two mvestigations A hydrogeologic reconnaissance (Phase I mvestigation) was conducted m 1990 (EarthFax 1990) and a Phase n mvestigation was conducted m 1991 (EarthFax 1991a) The locations of all 13 momtormg wells m the NTF area appear on Figure 4 Two rounds of groundwater sampling were performed m the NTF area, one m Aprd 1990 and one m December/January 1991 In addition, two NTF area momtormg wells were sampled durmg the Chevron Pipdme area mvestigation m September 1991 The followmg sections discuss analytical results from these three samplmg events 6 3 1 Apnl 1990 Sampbng Event Monitoring wells EF-1, EF-2, and EF-3 were sampled and analyzed for volatde orgamc compounds (VOCs), semivolatde orgamc compounds (SVOCs), TPH as gas and diesel, BTEX, and dissolved metals Table 16 presents analytical results for this samplmg event Momtormg well EF-2 displayed the highest concentration of almost every constituent analyzed Detectable concentrations of orgamcs were also detected m upgradient momtormg wdl EF-1 Diu'mg momtormg well mstallation, all soU samples collected contamed detectable conc«itrations of BTEX and TPH The highest concentration of BTEX and TPH m sod were generally at or unmediately above the groundwater elevation 52 XE. 313-R0«36WhwpiBVnmim.em«V3-Z3-94\ffa TABLE 16 CHEVRON CME NORTH TANK FARM SUMMARY OF APRIL 1990 GROUNDWATER SAMPLING Refinery Hazardous Constituent Volatiles Constituents (ppb) EF-1 EF-2 EF-3 HBRLJa) Benzene 380 6.300 290 5 Toluene 85 ND 15 10,000 htnyioenzene 120 ND NO 4,000 Xylenes (Total) 270 460 47 70.000 Refinery Hazardous Constituent Semhniiatiies Constituents (ppb) EF-1 EF-2 EF-3 HBRL(a) 1 -Methylnaphthalene ND 99 88 Naptnalene 10 240 150 14.000 Benzenethiol NO NO 56 Gasoline Range Organics and Selected Compounds EF-1 EF-2 EF-3 HBRLCa) Benzene 370 6.500 310 5 Toluene 80 ND 17 10.000 Ethylbenzene 120 250 57 4.000 Xylenes (Total) 260 430 40 70,000 Gasoline Range Organics 2.500 19.000 1.500 00 — Gasoline NO NO NO Dissolved Metals Arsenic 0 016 NO 0 014 0 05 Barium 012 063 0 29 1 00 Calcium 139 102 52 — iron 0 97 44 016 — Magnesium 354 74 3 29 8 Potassium 16 5 267 22.8 Sodium 141 210 99 9 63 REJ13-ROIOS6\ohwna\SWMU21 *I\2-24-M\ndtf Prior to collection of groundwater samples, each well was visually obsoved for freephase hydrocarbons A mirror was used to reflect light mto each wdl to detect surface films on die water table Free-phase hydrocarbons were observed m momtormg wdl EF-2, however, the product thickness was very thm and not measured Both EF-1 and EF-3 had partial film coatmgs suspected of bemg free-phase hydrocarbons In addition, four supplemental auger holes were installed m die NTF area to evaluate the potential presence of free-phase hydrocarbons The exact locations of these holes are unknown Free-phase hydrocarbons were observed m three of the four auger holes 6 3 2 December 1990/January 1991 SampUng Event In December 1990/January 1991, groundwater samples were collected from momtormg wells previously sampled durmg Phase I (EF-1 through EF-3) and all newly mstalled momtormg wells (EF-2D and EF-4 through EF-9), and two existmg momtormg wells (S-16 and S-19) Momtormg wells S-16 and S-19 were installed as part of the Chevron refinery mvestigation All samples were analyzed for BTEX, TPH, amons, cations, and metals Petroleum product identification was also conducted Analytical results are presented m Table 17 All momtormg wells axc^t EF-4, EF-5, EF-7, and EF-8 had detectable concentrations of BTEX Momtormg wdls EF-1, EF-2, EF-6, and EF-9 showed the highest concentrations of BTEX constituents rangmg from 4 620 mg/L to 0 295 mg/L benzene With the exception of momtormg wells EF-2 and EF-5, all momtormg wells had detectable concentrations of TPH components The concentration of orgamcs in wells EF-1 through EF-3 was generally Iowa durmg Phase II samplmg than during Phase I Ten supplemental auger holes were mstalled at various locations across the NTF area to collect free-phase hydrocarbons for fingerprmt analyses Gasolme or diesd was present m mne of ten auger holes The product plume map drawn from the supplemental auger hole data, extended the plume to monitoring well EF-7 south of the Bonnevdle Canal 54 >B. 313«DI05«\clMwiaa\nvicn.eM\3-2344\ifa' TABLE 17 CHEVRON CME NORTH TANK FARM SUMMARY OF DECEMBER 1991/JANUARY 1991 GROUNDWATER SAMPLING Concentration Parameter EF-1 EF-2 EF-2D EF-3 EF-4 EF-5 EF-6 EF-7 EF-8 EF-9 Benzene 0 295 4 620 . <0 05 0 142 <0 05 <0 05 1 66 <0 05 <0 05 0 929 Toluene 0 037 0 079 <0 0S <0 05 <0 05 <0 05 <0 05 <0 05 <0 05 0 124 Ethyttieiizene <0 002S 0 147 <0 05 <0 05 <0 05 <0 05 <0 05 <0 05 <0 OS 0 286 Xylene 0 128 0 426 <0 05 <0 05 <0 05 <0 0S 0 486 <0 05 <0 05 0179 TPH <0 5 13 50 <0.5 1 05 060 <0 6 7 15 1 48 0 71 416 pH 8 36 8 64 8 51 8 47 822 8 02 8 19 7 76 8 57 8 63 Chromium (Hex) <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 Lead <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 <0 01 Product t D Gasoline 7 <aasollne 7 None Gasoline ? Napthalene 7 Gasoline 7 None See (a) Gasoline ? Gasoline ? Note Analyzed by Method 8020 and 8015 (ModSied) a B Tetrahydrolhlophene 65 RE.^l^RN0Se^(Ilwvna\nwGIIla\SWMUlel7 M\l-2*^\aU 6 4 OIL DRAIN The Od Dram is located along the western portion of the Chevron refinery and flows from south to north across the property Before entermg the Chevron property, the Od Dram passes through die Salt Lake City Wastewater Treatment Plant (WWTP) On CSievron's property, the Od Dram is m du-ect hydraulic connection with tbe shallow aquifer and receives most of the shallow groundwater leavmg the refinery (Dames & Moore, 1985a) Three locations were sampled along the Od Dram WW-3 is located below Chevron's NPDES discharge and south of the Salt Lake City Wastewater Treatmg Plant WW-2 is located downstream of the WWTP's effluent discharge and upstream of Clievron's property WW-1 is located upstream of the WWTP Samples from these three locations are collected from the Od Dram on die same semi-annual basis as shallow and de^ wells Figure 1 dlustrates two of the Od Dram sample locations All semiannual samplmg reports state that the effects of the WWTP are evident m the WW series samples Chevron states the Od Dram samples show the dominatmg effects of the WWTP discharge The WWTP dUutes highly salme waters above the plant with water contammg higher concentrations of organic carbon and nitrogen Samples from location WW-1 consistently display high TDS content, while samples directly below the WWTP display ni^ concentrations of ammoma and mtrogen Concentrations of major ions are often 2 to 3 tunes higher upstream of the WWTP at WW-3 than at WW-2 or WW-1 Orgamc constituents have been detected m samples collected downstream of refinery op^ations (WW-1) These orgamc compounds mclude 2,4-dunethylphenol (sprmg 1986), 2-butanone (fall 1987), dichloromediane (fall 1984 and fall 1989), di-n-butylphthalate (fall 1991), and benzopyrene (spring 1993) Dichloromethane and benzopyrene were also detected m samples collected upstream of the refinery from sample location WW-2 durmg the same samplmg events Phtfaalates are constituents of various types of plastics and rubberized matenals and have also been detected m samples collected upstream of the refinery at location WW-2 Metals, pH, TOC, and TOX show no significant mcrease from samples collected upstream and downstream of the refinery 66 312-R0nS6\cbwnia\nncim.aaB\2-23-94\ib 6 5 SUMMARY OF ANALYTICAL RESULTS Smce 1984, 15 momtormg wells have been sampled at the Chevron refinery as part of the compliance order on consent and CAO requvements Groundwater samples have also been collected from groundwater momtormg wells m the NTF area smce 1990 In addition, momtormg wdls have been sampled at the Chevron Marketmg Terminal and at Chevron Pipdme Surface water samples have been collected from the Od Dram firom 1984 to the present Analytical data show that the uppermost aquifer has been affected by refinery opo'ations Several orgamc components mcludmg BTEX, benzenethiol, acid orgamc compounds (cresols and phenols), acetone, and elevated levels of metals have been detected m compliance pomt momtormg wdls S-2, S-10, and S-U downgradient of refinery operations Momtormg well S-2 contams high levels of orgamcs and metals and is located directly downgradient of the Oily Dump The Ody Dump was used as a disposal area for sludge from a sulfuric acid gas-od treating plant from 1953 to 1960 and as a general refinery dump site for solid matenal (Dames & Moore 1985b) Momtormg well S-2 is also located downgradient of the landfill area, whidi mcludes the Solid Waste Landfill, Hazardous Waste Landfill, Old Barrel Storage, and Standmg Water Surface Impoundment The Hazardous Waste Landfill is a RCRA-regulated umt These SWMUs are a likely source of contammation of the shallow aquifer m the vicmity of momtormg well S-2 Wells S-10 and S-U, located on die east side of the Od Dram, are also downgradient of die refinery and appear to have been affected by refinery operations Momtormg well S-10 is located directly downgradient of Pond No 3, and momtormg well S-U is located downgradient of Pond No 2 Additional areas of potential contammation upgradient of these momtormg wells mclude the Reservou-, the Storm Surge Pond, the Baffle Board Pond, and die API S^arator Sludge Pit, which are all RCRA-regulated units, and other refinery operations In other compliance pomt momtormg wells (S-l and S-24), orgamcs and metals levels were not significant Both momtormg wells are located south of die refinery and not direcdy downgradient of refinery operations 57 RB. 31^R0«a9e\<lMwnaWicis.caBe\»23-M\>fcr Except for three samplmg events m 1989 and 1990, no orgamc compounds were detected m de^ momtormg wdls beneath the refinery Mdals concratrations detected m deep momtormg wells are less than levels detected m shallow momtormg wells No orgamc compounds or metals were detected m deep momtormg wdl EF-2D at the NTF Wells D-l, D-5, D-10, and D-35 have all contamed unexplamed high levels of od and grease m one or two samplmg events between 1988 and 1990 Hiis may be due to laboratory error or it may be indicative of some contamination Concentrations of ammoma, TOC, and TOX m the deep momtormg wells are not indicative of refinery contamination Analytical results show that the NTF area has also affected die fallow aquifer BTEX, TPH components, and firee-phase hydrocarbons have been detected m several momtormg wdls at these focdities Smce 1984, no statistical analyses have been performed on any analytical data collected from momtormg wells at the Chevron refinery Eighteen san^lmg events have occurred smce 1984 Conclusions readied from the 1984 statistical compansons were not clear The GWQAR (Dames & Moore 1985a) stated that high detection lumts resultmg firom matrix effects Qugb TDS content) made metals comparisons m upgradient and downgradient momtormg wells meanmgless The rq>ort also stated that the higher concentrations of metals m most downgradient momtoring wells was not sigmficant due to matru effects (high TDS content) These two statements pear to contradict each other Also, no conclusive comparisons were made regarding orgamc concentrations m upgradient and downgradient momtormg wells Detection limits were unacceptably high for many of the samples analyzed (for example, 0 500 mg/L for Pb [Wdl S-2A m October, 1990] or 10,000 /tg/L for acenaphthene [Well S-2A m November, 1989]) In addiuon, no statistical analyses have been performed on analytical data from momtormg wells at die NTF area of the refinery However, investigations show moderate-to-high levels of petroleum hydrocarbons m sod and groundwater as well as firee-phase hydrocarbons on the shallow groundwater table Several orgamc analytical parameters have been elunmated from the samplmg program m the last 3 years These mclude dichloromediane, methyl merc^tan, and 2-Butanone Tliese analytes were not mcluded on the origmal consent order analyte list from 1984 or die 1991 CAO analyte list However, these analytes have been previously detected m compliance point momtormg wdls 53 KB. 31^K0«QS6WfasmIl\lmclm.e^w\^34-W^lfcr Acetone was detected m several wells m modo-ate^o-higfa concentrations In 1987, Chevron made changes to its samplmg and decontanunation procedures to resolve this problem High concentrations of acetone were stdl detected m momtormg well S-2, and Chevron concluded that acetone m dus momtormg well resulted from refinery opo-ations In 1991, however, this analyte was elimmated from the samplmg program Ammoma-mtrogen and TOC were also diminated from die CAO 1991 list, although they are both meamngful measures of water quality No explanation for the dimination of any of these compounds was presented m the semiannual samplmg rq>orts 7 0 SUMMARY AND CONCLUSIONS Over the past 13 years. Chevron has mvestigated the geology and hydrogeology of its property, instituted a groundwater momtormg program, and consistendy sampled the groundwater m specific deep and shallow momtormg wells The various subsurface mvestigations have given Chevron an adequate understandmg of the complex hydrogeologic conditions beneath the property Therefore, Chevron has properly designed its momtormg wells to correctly momtor the shallow and deep aquifers Because construction specifications for some momtormg wells are mcomplete or absent, the conclusion that all 130 momtormg wells are adequate cannot be made Howevn-, Ae majonty of the monitoring wells are constructed properly and could be used for future RFI activities Although the system as designed is adequate to detect rdeases from the refinery, the numb«^ of wells actually sampled and analyzed since 1984 is not Tbe historical samplmg of 10 shallow and five de^ wells, SIX of which are upgradient, is not adequate to characterize contammation at a site the size of Chevron with its many potential sources of contamination Shallow downgradient momtormg wells have consistently contamed high levds of orgamcs and metals (S-2, S-10, and S-l 1) Two other shallow compliance pomt momtormg wells (S-l and S-24) located south of the refinery have not contamed sigmficant levels of orgamcs and metals Except for three sampling evrats m 1989 and 1990, no organic compounds were detected m the de^ momtormg wells beneath the refinery To complete the phase n activities of this CME, a site visit is planned for Aprd 1994 Ldcely areas for investigation and/or samplmg during the phase II visit are discussed bdow Specific momtormg well locations and analytical parameters wdl be specified m the Phase n field sanq>lmg plan 59 ^I^R0t(H«^ch>ma\nwrctB.OB•^2-^3-9(\lfa Groundwater san^les should be collected from momtormg wells S-l, D-l, D-10, and S-10 All of these wells are downgradient of the refinery Contamination has been detected m the shallow wells but has not been confirmed m the deep wells (jroundwater samples firom these momtoring wdls can be analyzed to evaluate CSievron's analytical results Sanq>lmg should^ mclude specific techniques for recovmng dense nonaqueous phase liquids (DNAPLs) and y possibly light nonaqueous phase liquids (LNAPLs) Groundwato* samples from tibese momtormg wdls can be analyzed to evaluate Chevron's analytical results To analyze die effectiveness of die OU Dram m capturmg all shallow groundwater, momtormg well S-28 on the western side of the Od Dram shoidd be sampled Lastly, water levels should be measured m momtormg wells S-29, S-33, S-30, S-36, EF-14, and EF-13 The water level data can be used to reassess die GWQAR report conclusions of groundwater moundmg/dq)ression m this area preventmg all shallow groimdwater from reachmg the Jordan River 70 BB. 312-R0W3e\ckMnB\nvfam.caeV^2444\lfcr 8 0 REFERENCES Dames & Moore 1980 Phase I Hydrogeologic and RCRA Permittmg Studies, Salt Lake City Refinery Chevron U S A , Inc Salt Lake City, Utah Fdiruary Dames & Moore 1982 Hiase II Hydrogeologic and RCRA Permittmg Studies for Chevron USA, Inc Salt Lake City Refinery Chevron U S A , Inc Salt Lake City, Utah February Dames & Moore 1985a Groundwater Quality Assessment Report, Chevron Salt Lake City Refinery February Dames & Moore 1985b Waste Site Characterization Rqxirt, Chevron Salt Lake City Refinery February Dames & Moore 1987 R^rt Consent Order Senuannual Groundwater Samplmg Program, Salt Lake City Refinery for Chevron U S A , Inc July 9 Dames & Moore 1991 R^rt Consent Order Semiannual Groundwater Samplmg Program, Salt Lake City Refinery Chevron U S A , Inc February EardiFax Engineering, Inc 1990 Chevron Salt Lake City Refinery Nordi Tank Farm Hydrogeologic Reconnaissance June 19 EarthFax Engmeermg, Inc 1991a Chevron U S A , Inc Salt Lake City Refin^ North Tank Farm Phase n Investigation August EarthFax Engmeermg, Inc 1991b RCRA Facdity Investigation Work Plan for the Chevron Salt Lake City Refinery Chevron U S A , Inc Salt Lake City, Utah October EarthFax Engmeermg, Inc 1993 Sprmg 1993 Senu-Annual (Consent Order Samplmg R^rt Chevron USA, Inc Salt Lake City, Utah June Hely and odiers 1971 Water Resource of Salt Lake County, Utah State of Utah Department of Natural Resources Techmcal Publication 31 State of Utah 1984 Compliance Order on Consent No 8403083 Between Chevron U S A Inc and the State of Utah May 23 State of Utah 1991 Corrective Action Order No 91010011 Chevron U S A Salt Lake City Refinery March 21 U S Environmental Protection Agency 1990 National Prunary Drmkmg Water Regulations 40 CFR 141 Washmgton, DC 71 RB.31^R0«l36Wh«vnBVi«vn».cne\2-23-M\ifcr U.S. Enviro^^SaTProtection Agency Office o^^^pPrograms Enforcermenf TES 12 Technical EKjjjgpement Support at Hazarddmilwaste Sites Zone iVj ReqjQinlggrg, and 10 nnc PRC Environmental Management, Inc. CHEVRON REFINERY SALT LAKE CITY, UTAH RCRA COMPREHENSIVE GROUNDWATER MONITORING EVALUATION FINAL PHASE I REPORT APPENDICES Appendix A APTONDIXA CMEGHECiOJST 9950 2 APPENDIX A COMPREHENSIVE GROUND-WATER MONITORING EVALUATION WORKSHEET The following worksheets have been designed to assist the enforcement officer/ technical reviewer in evaluating theground-water monitoring system an owner/operator uses to collect and analyze samples of ground water. The focus of the worksheets is technical adequacy as it relates to obtaining and analyzing representative samples of ground water. The basis of the worksheets is the final RCRA Ground Water Monitoring Technical Enforcement Guidance Document which describes in detail the aspects of ground-water monitoring which EPA deems essential to meet the goals of RCRA. Appendix A is not a regulatory checklist. Specific technical deficiencies in the monitormg system can, however, be related to the regulations as illustrated in Figure 4.3 taken from the RCRA Ground-Water Monitoring Compliance Order Guide (COG) (included at the end of the appendix). The enforcement officer, in developing an enforcement order, should relate the technical assessment from the worksheets to the regulations usmg Figure 4.3 from the COG as a guide. Comprehensive Ground-Water Monitoring Evaluation Y/N I. Office Evaluation Technical Evaluation of the Design of the Ground-Water Monitoring System A. Review of Relevant Documents 1 What documents were obtained pnor to conducting the inspection a RCRA Pan A permit application*^ b RCRA Pan B permit application'' c Coirespondence between the owner/operator and appropriate agencies or cmzen's groups'' V d Previously conducted facility inspection reports'' y e Faculty's contractor reports? V f Regional hydrogeologic, geologic, or soil reports'' Y g The facility's Sampling and Analysis Plan? V h Ground-water Assessment Program Outline (or Plan, if thefacility is in assessment monitonng)? V 1 Other fspecifv^ OWPE A-1 Y/N B. Evaluation of the Owner/Operator's Hydrogeologic Assessment 1 Did the owner/operator use the following direct techmques m the hydrogeologic assessment a. Logs of the soil bonngs/rock conngs (documented by a professional geologist, soil nentist, or geotechmcal engineer)'' / b Matenals tests (e g, grain size analyses, standard penetration tests, etc y c Piezometer mstallation for water level measurments at different depths'^d. Slug tests'' V e Pump tests'' y i Geocheimcal analyses of soil samples'' V g Other (specify) (e g, hydrochemical diagrams and wash analysis) 2 Did the owner/operator use the following mduect techmque to supplement direct techmques data a. Geophysical well logs'' N b Tracer studies'' c Resistivity and/or electromagnenc conductance'' N d Seismic Survey'' N e Hydraulic conductivity measurements of cores'' V f Aenal photography'' g Ground penetratmg radar'' M h Other (specify) 3 Did the owner/operator document and present the raw data from the site hydrogeologic assessment'' V 4. Did the owner/operator document methods (cntena) used to conrelate and analyze the informauon'' y 5 The owner/operator prepare die followmg a Narrative descnption of geology'' 7 b Geologic cross sections'' y c Geologic and soil maps'' V d. Bonng/conng logs'' V e Structure contour maps of the differmg water beanng zones and conlimng layer'' Y f Narrative descnption and calculation of ground-water flows'' y OWPE A-2 9950^ Y/N g Water table/potentiometnc map'' r h Hydrologic cross sections'' y 6 Did the owner/operator obtam a regional map of the area and dekneate the facility'' Y If yes, does this map illustrate a. Surficial geology features'' V b Streams, nvers, lakes, or wetlands near the facihty'' y c Discharging or recharging wells near the facility'' V 7 Did the owner/operator obtain a regional hydrogeologic map'' y If yes, does this hydrogeologic map mdicate a Major areas of recharge/discharge'' Y b Regional ground-water flow direction'' V c Potentiomethc contours which are consistent with observed water level elevations'' y 8 Did die owner/operator prepare a facility site map'' Y If yes, does the site map show a Regulated units of the facility (e g, landflU areasjmpoundments)'' y b Any seeps, springs, streams, ponds, or wetlands'' V c Loc .on of monitonng wells, soil bonngs, or test pits'' V d How many regulated units does the facility have'' <5 If more than one regulated unit then, • Does the waste management area encompass all regulated units'' y • Is a waste management area deUneated for each regulated unit'' C. Characterization of Subsurface Geology of Site 1 Soil bonng/test pit program a. Were the soil bonngs/test pits performed under thesupervision of a qualifled professional'' - b Did the owner/operator provide documentation for selecting the spacing for bonngs'' c Were the bonngs dniled to the depth of the flrst confining unit below the uppermost zone of saturation or ten feet mto bedrock'' V d Indicate the method(s) of dnllmg- HoWa^ - o^j. ea^W tel OWPE A-3 Auger (hollow or solid stem) Mud rotary Reverse rotary Cable tool Jetting Other (specify) 9950 2 Y/N Were continuous sample conngs taken? f How were the samples obtained (checked method[s]) •Splitspoon V> - • Shelby mbe, or sumlar • Rock coring _____ • Ditch samphng ____ • Other (explain) g Were the continuous sample conngs logged by a qualified professional u geology'' h Does the field boring log include the following information • Hole name/number'' y Date staned and finished'' • Dnller's name'' y T • Hole locanon (i e , map and elevation)'' * Dnll ng type and bit/auger size'' > Gross petrography (e g, rock type) of each geologic unit'' V ' Gross mineralogy of each geologic unit'' • Gross structural mterpretation of each geologic umt and structural features (e g, fractures, gouge matenal, solution channels, buned streams or valleys, identification of deposmonal matenal)'' 1^ • Development of soil zones and vertical extent and descnption of soil type'' Depth of water beanng unit(s) and vemcal extent of each'' Depth and reason for termination of borehole'' 1. Depth and location of any contaminant encountered m borehole'' Sample location/number'' • Percent sample recovery'' -cr<\ ST^^Q^JMYOJA • Nanative descnptions of —Geologic observations'' Y —^Dnlhng observations'' 1 Were the followmg analytical tests peifonnedon the core samples* * Mineralogy (e g, microscopic tests and x-ray diffraction)'' • Petrographic analysis —degree of crystallinity and cementation of matnx'' —degree of somng, size fracnon (i e, sieving), textural vanations'' \N1 -rock type(s)? OWPE •950 2 Y/N —soil type*' y —approximate bulk geochenustry? N —-existence of miorostrucmres that may effect or mdicate fluid flow? • Falling head tests'' V • Static head tests'' N • Settling measurements'' NJ • Centnfuge tests'' • Column drawmgs'' D. Verification of Subsurface Geological Data I Has the owner/operator used mduect geophysical methods to supplement geological condiQons between borehole locations? y 2 Do the number of bonngs and analytical data mdicate that the confimng layer displays a low enough permeabihty to impede the migration of contammants to any stratigraphically low water-beanng units'' y 3 Is the confimng layer laterally contmuous across die entire site? 4 Did the owner/operator consider the chemical compatibUity of the site-specific waste types and the geologic matenals of the confimng layer? i 5 Did the geologic assessment address or provide means for resolution of any information gaps of geologic data'' y 6 Do the laboratory data conoborate the field daui for petrography? y 7 Do the laboratory data CQtroborate the field data for mineralogy and subsurface geochemistry'' E. Presentation of Geologic Data 1 Did the owner/operator present geologic cross sections of the site'' y 2 Do cross secuons. a identify the types and charactenstics of the geologic matenals present? Y b define the contact zones between different geologic matenals? y c note the zones of high permeabihty or fracture'' y d. give detailed borehole information mcludmg. OWPE A-5 9950^ Y/N • location of borehole? V • depth of termmation'' V • location of screen (if apphcable)? y • depth of zone(s) of saturauon? y • backfill procedure? V 3 Did the owner/operator provide a topographic map which wu constructed by a hcensed surveyor? 4 Does the topographic map provide* a. contours at a maximum mterval of two-fiset? 1 b locanons and illustrations of man-made features (e.g, parldng lots, factory buildings, drainage ditches, storm dram, pipelines, etc)? c descnpoons of nearby water bodies'' d descnpaons of off-site wells? e site boundanes'' f mdividual RCRA umts'' g dehneation of the waste management area(s)? h well and bormg locations'' 5 Did the owner/operator provide an aerial photograph depicting the site and adjacent off-site features'' 6 Does die photograph clearly show surface water bodies, adjacent municipalities, and residences and are these dearly labelled'' y F. Identification of Ground-Water Flowpaths 1 Ground-water flow direction a. Was the well casmg height measured by a licensed surveyor to the nearest 0.01 feet? y b Were the well water level measurements taken widiin a 24 hour period? y c Were the well water level measurements taken to the nearest 0.01 feet? V d. Were the well water levels allowed to stabilize after construction and development for a minimum of 24 houn prior to measurements'^ Y e. Was the water level mformaucMi obuuned from (check appropriate one): • muluple piezometers placed in single borehole? ._ • vertically nested piezometers in closely spaced separate • boreholes? • monitonng wells? OWPE A-6 9950 2 Y/N f Did the owner/operator provide construction details for the piezometers'' V g How were the staac water levels measured (check method[s]) • Electnc water sounder • Wetted tape • Air hne • Other (explain) h Was the well water level measured in wells with equivalent screened mtervals at an equivalent depth below the saturated zone? V 1 Has the owner/operator provided a site water table (potennometnc) contour map'' V If yes, • Do the potentiomemc contoun appear logical and accurate based on topography and presented data'' (Consult water level data) V • Are ground-water flow-hnes udicated'' Y • Are staac water levels shown'' y • Can hydrauhc gradients be estimated'' Y J Did the owner/operator develop hydrologic cross sections of the vertical flow component across the site using measurements from all wells'' y k Do the owner/operator's flow nets include. • piezometer locations'' y • depth of screening'' • width of screening'' • measurements of water levels from all wells and piezometers'' y 2 Seasonal and temporal flucmations m ground-water a Do flucmations m static water levels occur'' If yes, are the flucmations caused by any of the following Y —Off-site well pumping —Tidal processes or other mtenmttent natural vanations (e g, nver stage, etc.) —On-site well pumpmg N —Off-site, on-site construction or changing land use patterns —^Deep well mjecoon V —Seasonal varianons —Other (specify) . b Has the owner/operator documented sources and patterns that contnbute to or affect the ground-water patterns below the waste management'' y c Do water level fluctuations alter the general ground-water gradients and flow directions'' y d Based on water level data, do any head differentials occur that xaay mdicate a vertical flow component m the saturated zone? y OWPE A-7 99502 Y/N e Did the owner/operator implement means for gauging long term effects on water movement that may result from on-site or off-site construcaon or changes in land-use patterns'' ^] 3. Hydrauhc conductivity a. How were hydraulic conductiviaes of the subsurface matenals determined'' Y • Single-well tests (slug tests)? V • Multiple-well tests (pump tests) y • Other (speafy) ^c-.- 'v r caS^or ^ y b If single-well tests were conducted, was it done by. • Adding or removmg a known volume of water'' V • Pressunzing well casing'' c. If single well tests were conducted m a highly permeable formation, were pressure transducers and high-speed recording eqmpment used to record the rapidly changing water levels'' d Since smgle well tests only measure hydraulic conducovity m a limited area, were enough tests run to ensure a representative measure of conductivity in each hydrogeologic unit'' y e Is the owner/operator's slug test data (if apphcable) consistent with existmg geologic informaQon (e g, bonng logs)'' y f Were other hydraulic conductivity properties detenmned'' V g If yes, provide any of the followmg data, if available • Transmissivity • Storage coefficient • Leakage • Permeabihty "1 • Porosity • Specific capacity • Other fspecifv'4 4 Identificaaon of the uppermost aquifer a. Has the extent of the uppermost saturated zone (aquifer) in the facihty area been defined'' If yes. Y • Are soil bonng/test pit logs mcluded'' y • Are geologic cross-sections mcluded'' y b Is there evidence of confimng (competent, unfractured, continuous, and low permeability) layers beneath the site'' If yes. y • how was continuity demonstrated'' i^sS^.. /C):f^rrr^ c What IS hydrauhc conducnvity of the confimng umt (if present)'' CM/Sec How was It detenmned'' 3 >^\0 •* ^ La^^oi^^y Clv^aVysO ^C. OWPE A-8 I 9950 2 Y/N d. Does potential for other hydraulic commumcation exist (e g, lateral incontinuity between geologic units, facies changes, fracture zones, cross cumng structures, or chemical corrosion/alteration of geologic umts by leachage'' If yes or no, what IS the rationale'' . y G. Office Evaluation of the Facility's Ground>Water Monitoring System— Monitoring Well Design and Construction: These questions should be answered for each different well design present at the facihty 1 Dnlhng Mediods a. What dnllmg method was used for the welP • Hollow-stem auger • Solid-stem auger • • Mud rotary • • Air rotary • • Reverse rotary 0 • Cable tool • Jemng O • Air dnll w/ casing hammer • • Other (specify), b Were any cutting fiuids (mcluding water) or additives used durmg dnllmg'' If yes, specify • Type of dnlhng fluid • Source of water used • Foam • Polymers. •Other c Was the cumng fluid, or additive, idenafied'' d. Was the dnllmg equipment steam-cleaned pnor to dnllmg the well'' • Other methods y e Was compressed air used durmg dnllmg'' If yes, • was the air filtered to remove oil'' f Did the owner/operator document procedure for estabhshmg the potentiometnc surface''If yes, • how was the location estabbshed'' g Formation samples OWPE A-9 9950 2 Were formation samples collected imtially dunng drilling'' Y/N y Were any cores taken continuous? - sw-SL 2 If not, at what mterval were samples taken'' - w*>\.^o^j<K\ How were the samples obtained'' -^pht spoon —Shelby tube —Core dnll —Other (specify) Identify if any physical and/or cheimcal tests were performed on the formation samples (specify) 2. Monitonng Well Construction Matenals a. Identify construction matenals (by number) and diameters (ID/OD) Matenal Diameter , • Pnmary Casmg p\/CL .s^aL^^ 31" 4 5^ • Secondary or outside casmg (doubleconstruction) • Screen b How are the sections of casmg and screen cormected'' • Pipe sections threaded 1 • Couplings (fincoon) with adhesive or solvent • Couplings (friction) with retamer screws Other (specify) c Were the matenals steam-cleaned pnor to mstallation'' • If no, how were the matenals cleaned'' 3 Well Intake Design and Well Development a Was a well mtake screen installed'' • What IS the length of the screen for the well'' y • Is the screen manufactured'' b Was a filter pack installed' Y • What kmd of filter pack was employed? Y T • Is the filter pack compatible with formanonmatenals'' • How was the filter pack mstalled'' OWPE A-10 9950 2 Y/N • What are the dimensions of the filter pack'' . V • Has a turbidity measurement of the well water ever been made'' • Have the filter pack and screen been designed for die insim matenals'' / c Well development • Was the well developed'' y • What technique was used for well development? —Surge block •^Bailer —Air surging H^^ater pumpmg —Other fspecifv) y 4 Annular Space Seals a. What IS the annular space m the saturated zone duecUyabove the filter pack filled with -Sodium bentomte (specify type and gnt) -^^^Cement (specify(^^ or concrete) —Other (specify) y b Was the seal installed by —^Dropping matenal down the hole and tampmg —^Dropping matenal down the mside of hollow-stem auger —'^'remie pipe method —Other (specify) c Was a different seal used m the unsaturated zone'' If yes, . «^ Y • Was this seal made with'' —Sodium bentomte (specify type and gnt) —•Cement (specify neat or concrete)- Other (specify) Y • Was this seal mstalled by'' —^Droppmg matenal down the hole and tamping —^Dropping matenal down the mside of hollow stem auger —Other (specify) d. Is the upper portion of the borehole sealed with a concrete cap to prevent infiltration from the surface'' e Is the well fitted with an above-ground protectivedevice and bumper guards'' f Has the protective cover been mstalled with locks to prevent tampenng'' OWPE A>11 9950 2 Y/N H. Evaluation of the Facility's Detection Monitoring Program 1 Placement of Downgradient Detection Momtormg Wells a Are the ground-water momtormg wells or clusters located immediately adjacent to the waste management area'' W b How far apan are the detection monitonng wells'' c Does the owner/operator provide a rationale for thelocation of each momtormg well or cluster'' y d Does the owner/operator identified the well screenlengths of each monitonng well or clusters'' Y e Does the owner/operator provide an explanaoon for the well screen lengths of each monitonng well orcluster'' y f Do the actual locations of momtormg wells orclusters correspond to those identified by the owner/operator'' y 2 Placement of Upgradient Monitonng Wells a. Has the owner/operator documented the location ofeach upgradient momtormg well or cluster'' y b Does the owner/operator provide an explanation forthe location(s) of the upgradient monitonng wells'' y c What length screen has the owner/operator employed mthe background monitonng well(s)'' lO - \5 y d Does the owner/operator provide an explanation for the screen length(s) chosen'' y e Does the actual location of each background momtonng well or cluster conespond to that identified by the owner/operator'' y I. Office Evaluation of the Facility's Assessment Monitoring Program 1 Does the assessment plan specify a The number, location, and depth of wells'' y b The ranonale for their placement and identify the basis that will be used to select subsequent samphng locations and depths m later assessment phases'' 2 Does the Ust of monitonng parameters mclude all hazardous waste constituents from the facihty'' OWPE A-12 9950 2 Y/N a Does the water quahty parameter hst include other important mdicators not classified as hazardous waste constiments'' y b Does the owner/operator provide documentation for he bsted wastes which are not included'' 3 Does the owner/operator's assessment plan specify the procedures to be used to determine the rate of consanient nugration in the ground-water? 4 Has the owner/operator specified a schedule of implementation m the assessment plan'' V 5 Have the assessment momtormg objectives been clearly defined in the assessment plan'' y a Does the plan mclude analysis and/or re-evaluation to detenmne if significant contamination has occurredm any of the detection momtonng wells'' y b Does the plan provide for a comprehensive program of investigation to fully charactenze the rate and extent of contaminant imgration from the facility? y c Does the plan call for detenmnmg the concentrations of hazardous wastes and hazardous waste constituentsm the ground water'' V d Does the plan employ a quarterly monitormg program'' - /isrc^^ exrt^ uo^ V 6 Does the assessment plan identify the mvestigatory methods that will be used m the assessment phase'' a Is the role of each method m the evaluation fully descnbed'' b Does the plan provide sufficient descnptions of the direct methods to be used'' c Does the plan provide sufficient descnptions of the indirect methods to be used'' d Will the method contnbute to the further charactenzation of the contaimnant movement'' 7 Are the mvestigatory techniques utilized m the assessment program based on direct methods'' a. Does the assessment approach mcorporate mdirect methods to further suppon direct methods'' b Will the planned methods called for m the assessment approach ultimately meet performance standards for assessment momtormg'' c Are the procedures well defmed'' d Does the approach provide for monitoring wells similar in design and construction as the detectionmomtormg wells? A*13 Y/N e Does the approach employ takmg samples durmg dnllmg or coUectmg core samples for further analysis? 8 Are the mdu«ct methods to be used based on reliable and accepted geophysical techniques'' NiA- a. Are they capable of detecting subsurface changesresulting from contaimnant migration at the site'' b Is the measurement at an appropriate level of sensitivity to detect ground-water quality changes at the site'' c Is the method appropnate considering the nature of the subsurface matenals'' d Does the approach consider the limitations of these methods'' e. Will the extent of contammation and constiment concentration be based on direct methods and sound engineenng judgment? (Usmg mdirect methods tofurther substantiate the findmgs) 9. Does the assessment approach incorporate any mathe-matical modelmg to predict contammant movement? M a Will site specific measurements be utilized toaccurately portray the subsurface'' b Will the denved data be reUable? c Have the assumptions been identified? d. Have the physical and chemical properties of the site-specific wastes and hazardous waste constituentsbeen identified? J. Conclusions 1 Subsurface geology a Has sufficient data been collected to adequately define petrography and petrographic vanation? / b Has the subsurface geochemistry been adequately defmed? V c Was the boring/coring program adequate to defineiubsurface geologic vanaaon'' V d. Was the owner/operator's narrative description complete and accurate m us interpretation of the data? y e. Does the geologic assessment address or provide means to resolve any informaaon gaps'' V 2 Ground-water flowpaths a Did the owner/operator adequately estabhsh the hori-zontal and vertical components of ground-water flow? y OWPE A-14 9950 2 Y/N b Were appropnate methods used to estabhsh ground-water flowpaths'' y c Did the owner/operator provide accurate documentation'' Y d. Are the potentiometric surface measurements valid'' V e Did the owner/operator adequately consider the seasonal and ten^xxral effects on the ground-water? y f. Were sufficient hydrauhc conductivity tests performed to document lateral and vertical vanationin hydraulic conductivity in the entire hydrogeologic subsurface below the site'' V 3 Uppermost Aquifer a. Did the owner/operator adequately define the upper-most aquifer? y 4 Monitonng Well Construction and Design a Do the design and construction of the owner/operator's ground-water momtonng wells permit depth discrete ground-water samples to be taken'' y b Are the samples representative of ground-water quality'' V c Are the ground-water monitonng wells structurally stable'' y d. Does the ground-water monitormg well's design and construction permit an accurate assessment of aquifer charactenstics'' y 5 Detection Monitonng a Downgradient Wells • Do the location, and screen lengths of the ground-water monitoring wells or clusters m the detection momtonng system allow the immediate detection of a release of hazardous waste or constiments fmm the hazardous waste management area to the uppermost aquifer'' b Upgradient Wells • Do the location and screen lengths of the upgradient (background) ground- water monitormg wells ensure the capability of collecting ground-water samples representative of upgradient (background) ground-water quahty including any ambient heterogenous chemical characteristics'' Y 6 Assessoaent Monitormg a Has the owner/operator adequately charactenzed site hydrogeology to detenmne contaimnant migration'' b Is the detection monitormg system adequately designed and constructed to immediatelv detect any contaminant release'' OWPE A-15 c Are the procedures used to make a first determinationof contamination adequate'' 9950 2 Y/N d Is the assessment plan adequate to detect, charactenze, and track conuumnant migration'' e Will the assessment momtormg wells, given site hydrogeologic conditions, defme the extent and conceno-ation of contamination in the horizontal and v vemcal planes? PgAgg'not^ U<<M-^S. ,ec!i, vo\aMfl^ CS-i)^Sv<OQ.)p f Are the assessment momtonng wells adequately designed and constructed'' g Are the samphng and analysis procedures adequate to provide one measures of contamination'' y h Do the procedures used for evaluation of assessment momtormg data result m determinations of the rate of nugration, extent of migration, and hazardous consnment composition of the contammant plume'' 1 Are the data collected at sufficient frequency and duration to adequately determine the rate of migration'' J Is the schedule of implementation adequate'' k Is the owner/operator's assessment momtormg plan adequate'' • If the owner/operator had to implement hisassessment monitoring plan, was it implemented satisfactonly'' y n. Field Evaluation A. Ground-Wa'er Monitoring System I Are the numbers, depths, and locations of monitonng wells m agreement with those reponed m the facility's momtonng plan'' (See Section 3 2 3) B. Monitoring Well Construction 1 Identify construction matenal matenal diameter a. Pnmary Casing b Secondary or outside casmg 2 Is the upper portion of the borehole sealed with conrete to prevent infiloation from the surface'' 3 Is the well fitted with an above-ground protective device'' 4 Is the protective cover fitted with locks to prevent tampermg'' If a facihty utilizes more than a single well design, answer the above questions for each well design'' OWPE A*16 Appendix B APPENDKB BORE LOGS, MONITORING WELL CONSTRUCTION DATA, AND AQUIFER TEST DATA REFINERY AREA BORE LOGS I: K 7- BORING S-l ELEVATION 4210 ei FEET • 9 SM ML TAN SILTY PINE SAND WITH TMACE MEDIUM SAND •ROWN CLAYEY SILT 1 48 PCET TO WATER ON 7- 10- (1 BLUISH-CRAY CLAY ORAY PINE TO MEOUM SAND WITH TRACE SILT l^frERLAYERED GRAY CLAY AND SILTY PINE TO MEDIUM SAND BORING S-2 22 ELEVATION 4217 51 FEET GP- SM (FILL) SM SM •LACK SILT TO FINE GRAVEL .SOME OIL OR ASPHALT FRAQMENTS ^ILL) •LACK TO BROWN SILTY PINE SAND OIL ODOR GREENISH-GRAY SILTY CLAY t 09 PEET TO WATER ON 7 - JO - «1 •LACK SILTY PINE SAND GREENISH-CRAY SILTY CLAY BORING COMPLETED AT IS 0 PCET 0N5- II-»I BLACK FINE TO MEDIUM SAND OIL ODOR BORING COMPLETED AT IS 0 PEET ON3- II -»l COORDINATES' E 10.238 4 N 7752 6 COORDINATES' E 9263 4 N 10.742 3 LOG OF BORINGS PLATE A-46 BORING S-3 BORING S-5 ELEVATION 42ia 2! FEET ELEVATION 4219 I! FEET B 7. z SM SP --•i: SM SM SP SP BROWN SILTY FINE SAND MOIST MINOR ROOTS BROWN SILTY PINE TO MEDIUM SAND TRACE PINE GRAVEL 4 K PEET TO WATER ON 7- » - tl > GREEN SILTY FINE SAND GREEN PINE TO MEDIUM SAND • 12 • GREENISH-GRAY PINE TO MEDIUM SAND • 4 BORING COMPLETED AT IS 0 PEET ON 5- 7- II COORDINATES Nil ua 2 E II 410 S GP CiiJl SM SM SM SM- SP •ROWN PINE SAND TO PINE GRAVEL TRACE SILT (FILL) •LACK TO DARK BROWN SILTY PINE BAND MOIST DARK BROWN TO BLACK SILTY PINE SAND WITH TRACE FOSSIL PRAGMEIfTS MOIST 4 27 PCET TO WATER ON 7- 2<- tl U GREENISH-GRAY SILTY PINE SAND t TRACE ROOT FRAGMENTS WET GRAY SILTY PINE SAND WITH INTER- LAYERS OP PINE TO MEDIUM SAND TRACE ROOT FRAGMENTS BORING COMPLETED AT IS S FEET ON 5 - •- •! eOOROINATES N N6Z 4 E 12 7ia ] LOG OF BORINGS PLATE A-47 BORING S-4 ELEVATION 4222 ft It! I lo- ts • t9 SO ML •ROWN SILT WITH PINE SAND SP SP WATER LEVEL AT S 47 PCET ON t-ia-ai BROWN nNC TO MEDIUM SAND SCRCCNCO WTERWU. BROWN PINE TO MEDIUM SAND BORING COMPLETED AT 20 0 FEET ON a - i2~ai COOROINATEB Nil 7ai 0 Ell a72 S LOG OF BORING i Dames & Moore PLATE A-48 BORING S-6 eOOnOINATES N 12 loe •LTVATMN 42ia I C t» 700 ML •MOWN SILT WITH SOME CLAY AND ROOT) • IS ML BRgEWIBII BRAY CLAYEY SILT MfAWA • • .« a a a . ~ - — ~ - WA1 mn LiBVBL AT 1 11 FKET OM •—IB •! KWilWill MtRML • • •RAOCS WITH SOME VERY PINE BAND • ML BRAV CLAVCV SILT WITH SOME PWC •ANO M.) BORMG eOMPLTTED AT 17 0 PEET ON a- 12- ai BORING S-7 eOOROWMTCS N II T7S CLEVATION 4210 S C 10 740 BORING S-8 eOORDINATCS N 10 tOS CLEVATION 42ia 0 C 10 t25 • 02 HI 9- ML BROWN SILT WITH SOME CLAY AND ROOTS SM ICII!!^ WATCR LCVCL AT S 00 PCCT ON o-ia-ai iCWOWO MIIRWIL GRCCNISH-CRAY SILTY PMC SAND WITH TRACC COARSE SAND GRADES WITH OCCASIONAL CLAY ANO GRAVEL LAVCRS GRCCMSH-GRAY SILTY PMC SAND BORING COMPLETCO AT IS 0 PCCT ON a - 12- at s «• IFILL) PILL eOMPOSeO OP GRAVEL AND CeaBLCS ML ML SP CL DARK BROWN ANO LIGHT GRAY MamXD CLAYCV SILT WITH TRACE 6RAVCI. WATCR LCVCL AT 9 as PCCT ON »-l»-tl GREENISH-GRAY CLAYEY SILT WITH TRACC PME SAND AND STRONG CHEMICAL OOOR B WilWfll aWlWWL GRAY PINC TO MCOIUM SAND WITH BTRONG CMMICAL eOOR GRAY SILTY CLAY BORING S-9 COOMDINATCS N 10 910 CLCVATION 42IS 2 C 10 170 • a li! tt.0% rom i ML ML SM MUIIN LLIVLVSILT •GRCCNISH-GRAY CLAYEY SILT WATCR LCVCL AT 4 SO PCCT ON »-ia-ai BORING COMPLCTCO AT la 9 PCET ON a - n - ai A-BB C A PKLO MOISTURC CXPRCSBCO AS A PCRCCNTAGC OP THC DRY WCIGHT OP SOIL B ORY DENSITY CXPRCSSCO M LBS PCR CUBIC FOOT C BLOWS PCR poor OP PCNCTRATIQN USING A 140 LB HAMMCR DROPPING M mCHCB • DCPTH AT WHICH UNDISTURaCD SAMPLE WAS CXTRACTCD • DCPTH AT WHICH DiSTURBCD SAMPLE WAS CXTRACTCD GRAY SILTY PMC SAND WITH BLACK MOTTLING BORING CeMPLCTCO AT 17 0 PCCT ON a - 13- ai LOG OF BORINGS (PREVIOUS INVESTIGATION) PLATE A-49 BORING S-IO CLCVATION 4217 2* FEET BORING SHI CLCVATION 42I7J1 FEET • 4 • 2 • 3 20- 23 22- 24- • 6 GM IF ILL) CL CL SM BROWNISH-GRAY GRAVEL SAND SILTS AND CLAY ^LL) GM li(FILL) CREENISH-CRAY SILTY CLAY WITH TRACE FINE SAND [ BROWNISH-CRAY CLAY WrTH TRACE \ SILT AND SAND WATER LEVEL AT a aOPCET ON II-I2-«I BLACK MOTTLING BETWEEN a S TO la S PEET CHEMICAL ODOR GRADES WITH SOME SILT BLUISH-GRAY SILT WITH SOME CLAY ANO FINE SAND MICA PRESENT BLUISH-GRAY PINE SAND WITH SOME SILT AND CLAY MICA PRESENT GRADES WITH TRACE SILT AND CLAY BORING COMPLETED AT 2S 0 PEET ON ll-2-ai BACKFILLED WITH BEKTONITE TO 17 9 PCET COORDINATES • N asia I E tlOi a ML li! • IS ML It- 318% lOa 4 ML BROWNISH-CRAY GRAVEL SAND SILT AND CLAY ^ILL) ^ ^ CREENISH-CRAV piNE SANDY SILT -\ TRACC OP CLAY MICA PRESENT WATER LEVEL AT a to PEET ON I l-l2-ai I BLACK MOTTLING AND CHEMICAL \ OOOR BETWEEN > 0 AND 17 0 PCET CREENISH-CRAY SILT WITH SOME PINE % •AND TRACE OP CLAY Q tO- CRAY SILT WITH SOME FINE SAND AND CLAY BORING COMPLETED AT la 3 PEET ON 11 - 4 - ai COORDINATES i N a573 2 E 9941 9 LOG OF BORINGS PLATE A-50 I i i i i 1 i I i i i i i CONSTRUCTION BORING S-12 ELEVATION 421S 0 COORDINATES N lOtX 2 E tfSS 3 WELL CONSTRUaiON BORING S-13 ELEVATION 4214 3 COORDINATES N |02D«,6 E 9999 3 12— IGM l(PILU : • WATER LEVEL AT S 9 FEET ON 2-2-94 rML SM BROWN SILTY FINE AND COARSE GRAVEL WITH SOME PINE TO COURSE SAND - MEDIUM DENSE (FILL) li! Z 7_ 1 GRAY CLAYEY SILT WITH SOME FINE SAND TRACE ORGANICS - OIL STAINED - HYCROCARBON OOOR T/24 GRAY SILTY PINE SAND DENSE ]GM ((FILL) ML BROWN SILTY PINE AND CCMRSE GRAVEL WITH SOME PINE TO COARSE SAND - MEDIUM DENSE GRAY CLAYEY SILT WITH TRACE PINE SAND - SLIGHT HYDROCARBON OOOR AND SOIL STAININr GRADING WITH STRINGERS OP SILTY PINE SAND - NO HYDROCARBON OOOR OR STAINING GRAY SILTY PINE SAND - LOOSE GRAY SILTY CLAY - VtRY SOFT GRADING WITH STTRINGERS OF SILTY FINE SAND - HYDROGEN SULFIDE OIX3R BORING COMPLETED AT 14 0 FEET ON J-2-«4 KEY TO WELL COWSTRUCTIOW ajuutujaKtmitn t ncaocnu , j 4om — ^ BORING COMPLETED AT 19 0 PEET ON 3-2-a4 = f" PVC ICHCDULE 40 flKMTMMHCH KEY TO SAMPLINS AAMPLING TYPE ^ ^ BLOW COLflTS • 1% KM riCLDMOisTmc-^ ^ owv otHsrrv UMPLMG TYPES AND H-OW COUNTS - U TYPC SAMPLER AND NUMBER OF SLOWS REfiURED TO CMIVE SAMPLER ONE FOOT USWS A 1« POUND HAMMER OROPPSM 30 •ICHES (M 9i nCATES THAT A THH WALLED EXTENSION WAS ATTACHED TO THE U TYPE MMPLER ANO WAS PUSHED TO OSTAW RECOWRV OF SAMPLE DENOTES SAMPLt46 ATTEMPT WITH NO RECOWRV DENOtTES IMOISTURaED SAMPLE LOG OF BORINGS Dames ft Moore PLATE A-51 I I i I i 1: I i i I i k i I WELL CONSTRUCTION BORING S-14 ELEVATION 421S.0 COORDINATES N 10160 a E 10t3t 1 WELL OCNSTRUCTION BORING S-15 ELEVATION 4211 5 COORDINATES N 10998 9 E 11962 t 2«— = GM (FILL) ML CL RROWN SILTY FINE ANO COARSE GRAVEL WITH SOME PINE TO COARSE SAND LOOSE (FILL) GRAY CLAYEY SILT WITH SOME PINE SAND - MEDIUM STIFF - SLIGHT HYDROCARBON OOOR WATER LEVEL AT 2 4 PEET ON »-t-t4 GRAY SILT AND FINE SAND WITH SOME GYPSUM CRYSTALS - LOOSE t 6- GRAY SILTY CLAY WITH TRACE FINE SAND - SOFT GRADING WITH STRINGERS OF SILTY FINE SAND BORING COMPLETED AT 12 0 FEET ON 3-5-t4 • 57 .AIL GM IFILL) CL- MLl SM ML SM BROWN SILTY FINE AND COARSE GRAVEL WITH SOME PINE TO COARSE SAND - MEDIUM DENSE (FILL) GRAY CLAYEY SILT WITH TRACE FINE SAND - STIFF - SLIGHTLY CEMENTED PINHOLE STRUCTURE GRAY SILTY FINE SAND - LOOSE BROtVN CLAYEY SILT WITH TRACE PINE TO COARSE SAND - SOFT GRAY SILTY PINE SAND - LOOSE BORING COMPLETED AT 12. S PEET ON 3-»-t4 LOG OF BORINGS Dames ft Moore PLATE A-52 BORING S-16 CONSTRUCTION El-EVATION 4219 9 COORDINATES N 10360 9 E 12378 2 WELL CONSTRUCTION BORING S-17 ELEVATION 4221 8 COORDINATES 2— li! 2 6— •2 : WATER LEVEL AT 2.2 PCET ON 3-f-t4 ML ML DARK BROWN CLAYEY SILT WITH TRACE FINE SAND - STIFF (FILL) LIGHT BROWN SILT WITH TRACE PINE SAND - LOOSE GRADING GRAY IN COLOR GRADING CLAYEY BORINr COMPLETEDAT 12 0 PEET ON3-»-t4 h ^5 • 12 • e N I0t48 2 E l2ISt t GM (FILL) ML- CL 6M SM BROWN SILTY PINE TO COARSE GRAVEL WITH SOME PINE TO COARSE SILT - LOOSE (FILL) ORAY CLAYEY SILT VHTH TRACE FINE SAND - MEDIUM STIFF WATER LEVEL AT I f FEET ON 3-7-14 GRAY SILTY FINE TO COARSE SAND AND GRAVEL - MEDIUM DENSE (GR'vY SANDSTONE GRAVEL) GRADING WITH OCCASIONAL COBBLES BORING COMPLETED AT 12 0 FEET ON 3-«-t4 LOG OF BORINGS Dames ft Moore PLATE A-53 I i I I i pf 1 'I I i I i i i i WELL CONSTRUCTION BORING S-18 ELEVATION 4217 7 COORDINATES N 9403 I E 10893 3 WELL CONSTRUCTION BORING S-19 ELEVATION 4214 3 COORDINATES N aS39 9 E I12S7 2 z • 23 027 GM SM (Fia) I WATER LEVEL AT 9 SS PEET ON 3-S-84 SM BROWN SILTY FINE TO COARSE SAND AND GRAVEL - MEDIUM DENSE (FILL) 2e- GRAY SILTY PINE SAND - MEDIUM DENSE GRADING LOOSE WITH LA\ ERS OF SILTY CLAY ANO CLAYEY SILT IGM I (FILL) ML rML BROWN SILTY FINE AND COARSE GRAVEL WITH SOME PINE TO COARSE SAND AND OCCASIONAL COBBLES - LOOSE (FILL) rATER LEVEL AT 0 9 FEET ON 7-a-94 \w. GRAY CLAYEY SILT WITH TRACE PINE SAND - SLKiHT HYDROCARBON ODOR - STIFF GRADING WITH STRINGERS OF BILTY FINE SAND GRAY SILTY FINE SAND - LOOSE GRAY CLAYEY SILT WITH TRACE PINE SAND - SLKMT PINHOLE STRUCTURE GRADING WITH SANDY STRINGERS BORING COMPLETED AT 11 9 FEET ON 3-9-94 GRAY SILTY CLAY - SOFT KEY TO WELL CONSTRUCTION I ^..WAIUUMtDITONITE 3't0-40SR<0e GRADING WITH LAYERS OP SILTY PINE SAND - LOOSE PVCIOC0U.C40 PRC WITH ONIKH •ion KEY TO SAMPLING MMPLSIG TYPE ^ ^ BLOW COUNTS • 1% DS FIELD MOISTURE DMV DEMSriY SAMPi.S4e TYPES ANO BLOW COUNTS U TYPE SAMPLER AND NIMBER OF BLOWS REBUHEOTO DtlVE SAMPLER ONE FOOT UBMC A t« POUND HAMMER OROPPSIG S SmES (P« MDICATES THAT A THM WALLED EXTEieiON WAS ATTACHED TO THE u TYPE SAMPLER AND WAS PUSHED TO OBTAIN RECOVERY OF SAMPLE - OCNOTES SAMPLWa ATTEMPT WITH NO RECOVERY -DENOTES UNOSTURBEO SAMPLE LOG OF BORINGS BORING COMPLETED AT 19 0 FEET ON 3-9-«4 Dames ft Moore PLATE A-54 BORING S-20 WELL ELEVATION 4217 I CONSTRUCTION COORDINATES N 9468 1 E 12106 0 n JLi. GM SM (FILL) ML- SM SM BROWN SILTY PINE TO COARSE SAND AND GRAVEL - LOOSE (FILL) GRADES WITH LESS GRAVEL CRAY CLAYEY SILT AND FINE SAND LOOSE GRAY SILTY FINE SAND - LOOSE BORING COMPLETED AT 13 0 FEET ON 3-6-t4 WELL CONSTRUCTION BORING S-2i ELEVATION 4213 8 ISc- IT- IS •— COORDINATES N a7ta 9 E11343 a |GM^ SM |(FILL) ML I (FLU BROWN SILTY FINE TO COARSE SAND AND GRAVEL - LOOSE (FILL) - OIL STAINED DARK BROWN CLAYEY SILT WITH TRACE FINE SAND - SLIGHT PINHOLE STRUCTURE - SLIGHT HYDROCARBON ODOR - STIFF I WATER LEVEL AT 2.2 PEET ON 2-29-84 ICL- MU GRAY SILTY FINE SAND - LOOSE GRAY CLAYEY SILT WITH TRACE FINE SAND - VERY SOFT GRADING WITH STRINGERS OF SILTY FINE SAND SLIGHT HYDROCARBON OOOR ' BORING COMPLETED AT 13 0 PEET ON 2-29-94 LOG OF BORINGS Dames ft Moore PLATE A-55 BORING S-22 —.^Jl^k,,^, ELEVATION 4213 I CONSTRUCTION COORDINATES N 7904 1 E 12096 4 5' z GM ML- CL SM BROWN SILTY FINE ANO CCMRSE GRAVEL WITH SOME FINE TO COARSE SAND - LOOSE LIGHT BROWN CLAYEY SILT WITH TRACE FINE SAND - MEDIUM STIFF - SLIGHT PINHOLE STRUCTURE GRAY SILTY FINE SAND - LOOSE GRADING WITH TRACE MEDIUM SAND GRADING WITH SOME SILT (SM-SP) BORING COMPLETED AT 12 S FEET ON 2-27-94 WELL CONSTRUCTION BORING S-23 ELEVATION 4213 4 0—r h- COORDINATES N 7890 2 E 114X 4 SM- GM (FILL) SM ML- CL BROWN SILTY FINE TO COARSE SAND AND FINE GRAVEL - LOOSE (FILL) LIGHT BROWN SILTY FINE SAND - LOOSE GRADING CRAY IN COLOR GRADING WITH STRINGERS OF CLAYEY SILT GRAY CLAYEY SILT WITH LAYERS OF SILTY FINE SAND - SOFT BORING COMPLETEDAT 12. S FEET ON 2-27-84 LOG OF BORINGS Dames ft Moore PLATE A-56 WELL CONSTRUCTION BORING S-24 ELEVATION 4210 8 COORDINATES N 7826 I E 10901 2 »— -1 9— = »— = DARK BROWN FINE TO MEDIUM SANDY SILT - TRACE ORGANICS - LOOSE GRAY SILTY CLAY WITH TRACE FINE SAND - SOFT GRADING WITH STRINGERS OF SILTY FINE SAND GRAY SILTY PINE SAND - LOOSE GRADING WITH STRINGERS OF SILTY CLAY ( 1/4 INCH BORING COMPLETED AT 12. S PEET ON 2-29-84 BORING S-25 .•^^JSSir,^ ELEVATION 4212.2 CONSTRUCTION t—i Is 6- COORDINATES N 7741 9 E 1012S 9 ML ML- SM BROWN CLAYEY SILT - TRACE ORGANICS - STIFF GRAY INTERLAYERED CLAYEY SILT WITH TRACE FINE SAND ANO SILTY PINE SAND - LOOSE GRAY SILTY CLAY VARVED V.ITH STRINGERS OF SILTY FINE SAND SOFT BORING COMPLETED AT 13 0 FEET ON 2-29-84 KEY TO WELL CONSTRUCTION 'to-AOaiucc ' to PVC SCHEDULE 40 nPC WITH JOS MW iLort KEY TO SAMPLINS SAMPLING TYPE-.^ BLOW COUNTS «l% K)S FIELD MOISTLPE ^ DRV DENSITY SAMPLR*6 TYPES AND BLOW COUNTS - u TYPE SAMPLER AND NUMBER OF BLOVS REOUIREO TO DRIVE SAMPLER ONE FOOT USMG A 1« POWD HAMMER OROPPINe 30 MCHES CP« MDICATES THAT A THM WALLED EXTEN&MN WAS ATTACHED TO THE U TYPE SAMPLER AND WAS PUSHED TO OBTAM RECOVERY OF SAMPLE DENOTES SAMPLMS ATTEMPT WITH NO RECOVERY CCHOTES UNDISTURBEO SAMPLE LOG OF BORINGS Dames ft Moore PLATE A-57 WELL CONSTRUCTION BORING S-26 ELEVATION 4212.6 COORDINATES N 7738 0 E 9974 3 ML SM ML DARK BROWN SILT WITH SOME FINE TO MEDIUM SAND - ORGANK: - LOOSE BROWN SILTY FINE SAND - LOOSE GRAY CLAYEY SILT WITH TRACE PINE SAND - BLOCKY - SLIGHT PINHOLE STRUCTURE - MEDIUM STIFF GRADING WITH STRINGERS OF SILTY FINE SAND DARK GRAY SILTY CLAY - SOFT GRADING WITH STRINGERS OF SILTY FINE SAND HYDROGEN SULFIDE OOOR GRAY SILTY PINE SAND - MEDIUM DENSE HYDROGEN SULFIDE ODOR BORING COMPLETED AT 19 0 FEET ON 2-22-94 WELL CONSTRUCTION 0- BORING S-27 ELEVATION 4211 0 COORDINATES N 7728 9 E 9925 8 6 0 o *' 5 & • = <• 1 1 1 ML ML- SM CL BROWN CLAYEY SILT WITH SOME FINE TO MEDIUM SAND - ORGANIC - LOOSE GRADING WITH LAYERS OF FINE TO MEDIUM SAND WITH SOME SILT CRAY CLAYEY SILT - SOFT GRADING WITH LAYERS OF SILTY PINE SAND STRONG HYDROGEN SULFIDE ODOR DARK GRAY SILTY CLAY - SOFT GRADING WITH OCCASIONAL STRINGERS OF SILTY PINE SAND BORING COMPLETED AT 12.9 FEET ON 2-22-84 • i I I LOG OF BORINGS Dames ft Moore PLATE A-58 i I i i I I sTs 1 i i WEU CONSTRUCTION BORING S-28 ELEVATION 4212 2 BORING S-28 (CONTINUED) COORDINATES N 9494 S E 9601 5 2— it 2e— X 4| i I i i i ML ML DARK BROWN SILT WITH SOME FINE TO MEDIUM SAND - TRACE ORGANICS - LOOSE GRADING GRAY IN COLOR GRAY CLAYEY SILT WITH TRACE FINE SAND - BLOCKY - SLIGHT PINHOLE STRUCTURE - MEDIUM STIFF 1 WATERLEVELAT'>3.0FEETaN 2-17-84 GRADING WITH FINE SANDY LAYERS DARK GRAY CLAYEY SILT - SOFT GRADING WITH OCCASIONAL STRINGERS OF SILTY FBIE SAND BORING COMPLETEDAT 22.0 FEET ON 2-20-84 GRAY SILTY CLAY WITH TRACE FINE SAND INTERLAYERED WITH SEQUENCES OF CLAYEY FINE SAND - MEDIUM STIFF KEY TO WELL CONSTRUCTION GRADES WITH HYDROGEN SULFIDE ODOR DARK GRAY FINE SAN J WrTH SOME SILT LOOSE ' 2 PVC KHCOULE 40 E i PPEWITHmHCH = I SLOrt KEY TO SAMPLING BLOW COUNTS • 1% m FIELD MOISTURE-^ ^ DRY DENSITY SAMPLMC TYPES AND BLOW COUNTS •• — U TYPE SAMPLER ANO NUMBER OF BLOWS REOUMEDTO ERIVE SAMPLER ONE FOOT USMG A l« POUND MMMER CROPPING B MCHES (Pd MDICATES THAT A THM WAU-EO EXTENSION WASATTACHEDTOTHE UTYPE SAMPLER ANO WAS PUSHED TO CBTA H RECOVERY OF SAMPLE OCNOTES SAMPLHG ATTEMPT WITH HO RECOVERY CCNOTES UNDttTURSED SAMPLE LOG OF BORINGS Dames ft Moore PLATE A-59 WELL CONSTRUCTION BORING S-29 ELEVATION 4211 I COORDINATES N 9436 4 E 9388 9 ML CL BROWN SILT WITH SOME FINE SAND - PINHOLE STRUCTURE - BLOCKY LOOSE - TRACE SHELLS I WATER LEVEL AT 26 INCHES ON 2-16-84 BROWN CLAYEY SILT WITH TRACE FINE SAND - MEDIUM STIFF GRADING WITH STRINGERS OF SILTY FINE SAND DARK GRAY SILTY CLAY - SOFT GRADING WITH STRINGERS OF StLlY FINE SAND HYDROGEN SULFIDE ODOR BORING COMPLETED AT 13 0 FEET ON 2-16-t4 WELL CONSTRUCTION BORING S-30 ELEVATION 4212 4 COORDINATES N 10698 2 E 9178 1 8— »— UjT- z z IS — CL DARK BROWN SILT WITH SOME FINE TO MEDIUM SAND - TRACE ORWNICS - LOOSE GRAY CLAYEY SILT - SOFT GRADING WITH STRINGERS OF SR.TY PINE SAND GRAY SILTY CLAY - SOFT GRADING WITH STRINGERS OF SILTY FINE SAND HYCROGEN SULFIDE ODOR GRAY FINE SAND WITH SOME SILT LOOSE BORING COMPLETED AT IS 0 FEET ON 2-21-84 LOG OF BORINGS Dames ft Moore PLATE A-60 BORING S-31 CONSTRUCTION ELEVATION 42113 COORDINATES N 10336 3 E 0144 0 It *-t 10 — ML CL DARK BROWN SILT WITH TRACE FINE SAND - TRACE ORMNICS GRAYISH-BROWN CLAYEY SILT LOOSE GRADING WITH STRINGERS OF SILTY FINE SAND WATER LEVEL AT 4 9 FEET ON 2-21-94 •ARK GRAY SILT WITH STRINGERS OF SILTY FINE SAND - SOFT DARK GRAY CLAYEY FINE SAND - LOOSE BORING COMPLETEDAT 13 0 FEET ON 2-21-84 BORING S-32 WELL ELEVATION 4212.0 CONSTRUCTION COORDINATES N 11430 0 E 8102.6 BROWN CLAYEY SILT WITH TRACE PME SAND - MEDIUM STIFF 1 WATER-LEVEL AT 0 S PEET ON 2-23-84 GRADING ORAY IN COLOR ORAY SILTY CLAY - SOFT GRADING DARK GRAY WITH STRINGERS OF SILTY PINC SAND BORING COMPLETED AT 12. S PEET ON 2-23-84 LOG OF BORINGS Dames ft Moore PLATE A-61 WELL CONSTRUCTION BORING S-33 ELEVATION 4211 7 a— = COORDINATES N 9454 4 E 79S3.6 ML CL BROWN CLAYEY SILT WITH TRACE FINE SAND - SLIGHT PINHOLE STRUCTURE MEDIUM STIFF X WATER LEVEL AT I 2 FEET ON 2-19-04 DARK GRAY SILTY CLAY - SOFT GRADING WITH STRINGERS OF SILTY FINE SAND GRADES WITH HYDROGEN SULFIDE ODOR BORING COMPLETEDAT 13 0 FEET ON 2-19-94 BORING S-34 WEyL ELEVATION 4212 3 COORDINATES N 8078 9 CONSTRUCTION 3— ^7- g7- '6 • 5 •8 E 7996 9 ML I WATER LEVEL AT 2 27 FEET ON 2-23-94 ML- SM SM DARK BROVN CLAYEY SILT WITH TRACE FINE SAND - TRACE ORGANICS - MEDIUM STIFF LIGHT BROWN SILT AND FINE SAND - LOOSE GRAY SILTY FINE SAND - LOOSE GRADING WITH STRINGERS OF SILTY CLAY ANO CLAYEY SILT BORING COMPLETED AT 12 9 FEET ON 2-23-94 LOG OF BORINGS Dames ft Moore PLATE A-62 BORING S-35 coN^fctriON E'-"*-''-* c 3—a< li! S 9— o— = COORDMATCS N IIM a E 1240 6 0 ML SM- ML SM GM DARK SROWN CLAYEY SILT WITH TRACE PME SAND BROWN CLAYEY SILT WITH TRACE PINE SAND - tlTERLAYER SEQUENCES OF SILTY FINE SAND fRO N SILTY FINE TO COARSE SAND ANL GRAVEL BORBIC COMPLETED AT 18 0 FEET ON 3-9-94 BORING S-36 CONSrofcriON B^VATICN 42373 COORDINATES N 11999 9 E 12906,0 »— «— CL LKiHT BLUISH-GRAY CLAY WITH TRACE FINE SAND GRADES TO CMRK BLUE CLAY BORING COMPLETEDAT 13 0 FEET ON 2- 16-84 LOG OF BORINGS Dames ft Moore PL-ATE A-63 WATER LCVCL 8-4- at • 9 32 PCET - 999% list 9 907% IOTI 20 •- 29- 30- Z95%-l2lB 49 SS D 23<%-l23| 38 90 • SURFACE tl.CV«TIOW 42t0 9»ftCT TAN SILTY PINE SAND WITH TRACE MED- UM SAND MAJOR ROOTS TRACE SHELL FRAGMENTS ORAY CLAYEY SILT LAMINATED WITH WITH SOME FINE SAND GEOPHYSICAL L06 CL BLUISH-CRAY VARVED SILTY CLAY CL CL ML SM ML CREENISH-CRAY VARVED SILTY CLAY WITH 0 25 INTERBEOS OF DARK CRAY PINE SAND GREENISH-BLACK TO BLACK CLAY WITH CLAYEY MEDIUM SAND INTERBEOS I THICK CRECNISH-CRAY TO BLACK CLAY AND SILT INTERLAYERED BLACK SILTY PINC SAND AND GRAY CLAY BLACK SILTY PINE SAND THINLY LAMINATED LIGHT TO DARK GREENISH-GRAY CLAY CL DARK CREENISH-CRAY CLAY GREENISH-GRAY SILT WITH SOME PINE SAND AND CLAY DARK CREENISH-CRAY SILTY PINE SAND . GREENISH-GRAY CLAYEY SILT WITH S TRACE FINE SAND U GRAY PINE TO MEDIUM SAND WITH TRACE U TO SOME SILT GRAY CLAYEY SILTY PINE TO MEDIUM SAND • GREENISH-GRAY CLAY BORING COMPLETED AT 90 0 PEET ON 4 - 28- 81 NOTES THE DISCUSSION IN THE TEXT UNDER THE SECTION TITLED •SrrC CONDITKINS SUBSURFACE IS NCCCSSARY TO A PROPER UNOERSTANOINC OF THC NATURE OF THE SUBSURFACE MATERIALS ' jianB I • m •» If t WCSTMDDRE ^ MEVRfN mmnm m • 1 Ktmrniimm ' mmin'tm I Mf • mimi m mm im. nm n HMM FYJ- KEY A-BMC A FIELD MOISTURC EXPRESSED AS A PERCENTAGE OF THE ORY WEIGHT OF SOIL B ORY DENSITY EXPRESSED IN LBS PER CUBIC FOOT C BLOWS PCR FOOT OF PENETRATION USING A 140 LB HAMMER DROPPING 30 INCHES • DEPTH AT WHICH UNDISTURBED SAMPLE WAS EXTRACTED B DCPTH AT WHICH DISTURBED SAMPLE WAS CXTRACTCD • SAMPLING ATTCMPT WITH NO RECOVERY B BULK SAMPLE BORING NO. D-l COORDINATES' E 10.2337 N TT45 I PLATE A-64 auBfACt tLtVATION 4217 9* FltT GEOPHYSICAL LOG 2TI%H2l| 10 30- 2T7% 1241 se 90«% 122! •* •- SP ML ML SM i CL SP SM ML BLACK TO DARK BROWN PINE SAND TO COARSE GRAVEL SOME OIL OR ASPHALT TRACES (FILL) WATER LEVEL 7-30-91 AT 3 43 PEET BROWN TO GRAY PINE SAND AND CRAY TO BLACK SILTY CLAY OIL OOOR CREENISH-CRAY TO BLUE BLACK VAR- VED SILTY CLAY SLACK OILY SILTY PINE SAND LKiHT TO DARK CRECNISH-CRAY PINC SAND WITH TRACE SILT STRONG OIL OOOR LKiHT TO DARK CREENISH-CRAY VARVED SILTY CLAY BLACK TO GREENISH-GRAY CLAYEY SILT WITH SOME FINE SAND BROWNISH-GRAY TO BLUISH-BLACK THINLY LAMINATED CLAYEY SILT WITH GRAY MEDUM SAND STRINGERS GREENISH-CRAY SILTY CLAY GRAY SILTY PINE TO MEDIUM SAND CRAY CLAYEY SILT GRAY FINE TO MEDIUM SAND WITH SOME CLAYEY SILT CRAY SILTY FINE TO MEDIUM SAND S GRAYISH-BROWN MEDIUM SAND CREENISH-GKAY VARVED SILTY CLAY GREENISH-CRAY MEDIUM SAND CREENISH-CRAY SILTY PINE SAND GREENISH-CKAY SILTY CLAY WITH A PEW THIN LAYERS OF FINE TO MEDIUM SAND MOTTLED BLUISH-GREENISH-GRAY SILTY CLAY GREENISH-CRAY SILTY PINE SAND DARK CREENISH-CRAY SILT WITH TRACE PINE SAND BORING COMPLETED AT 80 0 FEET ON 4 - 28 - 81 lAHES-nOOlit HEVRON <B-4P WS • ^1 —-PE-S»*»«MW ~ -_Z ««. SiT"* "^^Jm. I M mil ' I P*^ I i BORING NO. D-2 COORDINATES' E 9263 2 N 10.7502 PLATE A-65 WATER LEVEL 7-29-81 • 2 aa FEET . $UR«Cf ELEVATION 42l8l*re£T 2am-l29l 24 10 1 i SSSVIKI 20 • 30- 99—8- M3VI24B JO B- •0- CL CL CL BROWN SILTY FINE BAND MINOR ROOTS BROWN SILTY PINE SAND FINE TO COARSE GRAVEL M WASH GREENISH-GRAY SILTY FINE SAND WITH SOME CLAY CREENISH-CRAY SLTY PINE SAND CREENISH-CRAY CLAYEY SILT WITH SOME PINE SAND INTERLAYERS CREENISH-CRAY SILTY CLAY MOTTLED BLUISH AND BROWNISH-GRAY SILTY CLAY WITH SOME PINE SAND, BROWN MEDIUM TO COARSE SAND POORLY GRADED OVER PINE GRAVEL TO MEDIUM SAND WITH TRACE SILT BROWN PINE AND COARSE GRAVEL IN SILTY PINE SAND MATRIX DARK CAAY SILTY PINE SAND WITH STKINGERS OP SILTY CLAY DARK GREENISH-GRAY SILTY CLAY WITH SOME FINE SAND MEDIUM TO PINE SAND DARK CREENISH-CRAY SILTY CLAY DARK CREENISH-CRAY CLAYEY SILT WITH TRACE FINE SAND f GRAY FINE SAND WITH SOME SILT AND K CLAY U Z MOTTLED DARK BLUISH-GRAY AND ~ BROWNISH-GRAY CLAYEY SILT WITH H TRACE FINE SAND TRACE SHELL 5 FRAGMENTS u ^ DARK GREENISH-GRAY SIL'Y PINE SAND DARK GRAY SILTY PINE TO MEDIUM SAND DARK GRAY SILTY CLAY MOTTLED BLUISH AND BROWNISH-CRAY SILTY PINE SAND BROWN COMPLETED AT 80 0 PEET ON 4- 30- 81 GEOPHYSICAL LOG raSf 1 ; 1 pgiiry \— BORING NO D-3 COORDINATES' N 11.148 2 E 11.493 2 PLATE A-66 BORING D-4 POTENTIOMETRIC SURFACE - 4223 9 SURFACE ELEVATION - 4222 S • 60 20- • 49 2 30- I a. D 75 «0- SP ML GM GRAYISH-BROWN SILT WITH SOME PINC SAND MINOR ROOTS GRAYISH-BROWN SILT WITH SOME FINE SAND MINOR ROOTS UGHT GRAY SILTY CLAY WITH SOME FINE SAND UCHT BROWN PINE TO MEDIUM SAND WITH TRACE COARSE SAND GRADES WITH GRAVEL GRAYISH-BROWN PINE TO MEDIUM SAND DARK GREENISH-CRAY CLAYEY SILT DARK GREENISH-GRAY SILTY CLAY INTERLAYERED WITH DARK BROWN PINE TO MEDIUM SAND GRADES TO CLAYEY SILT DARK GRAY FINE SAND TO PINE GRAVEL WITH TRACE SILT ORAY COARSE GRAVEL WITH SOME SAND AND SILT GRAVEL ANO COBBLES WITH SAND LENSES SCREENED INTERVAL (CONTINUED) •0- • 70 gTO- I BO- 20 If SP-SM GRADES SANDY DARK CRAY PINE TO MEDIUM SAND WITH SOME SIL AND CLAY GRADES TO SILT DARK CREENISH-CRAY CLAYEY SILT DARK GREENISH-GRAY SILTY CLAY WITH STRINGERS OF FINE SAND BORING COMPLETED AT 81 S FEET ON »- II - »1 COORDINATCS Nil 779 2 Ell 862 1 m c C BLOWS PER FOOT OF PENCTRATK3N USING A 140 LB HAMMER DROPPING 30 INCHES P SAMPLC KYORAUUCALLY PUSHED • DEPTH AT WHICH UNDISTURBEO SAMPLE WAS EXTRACTED B DCPTH AT WHICH DISTURBED SAMPLE WAS EXTRACTED LOG OF BORING PLATE A-67 WATER LEVEL 7-30-81 *l S3 FEET 1 SURFACE ELEVATION 4218 9* FEET 32IVll»l 12 10 ' g6%-l2B| •100/4 40- 2 49- z o! I!j 50- 56- lies/i I I66%->34| IBS tc • 26 2%-l29| 66 « g SM ML SM SP SM sw GW SP SP SP ML BLACK SILTY PINE SAND WITH TRACE MEDIUM SAND AND COARSE GRAVEL AT SURFACE (FILL) CREENISH-CRAY SILT AND PINE SAND WITH SOME CLAY TRACE ROOT FRAGMENTS CREENISH-CRAY SILTY PINE SAND TRACE WOOD FRAGMENTS INTER- LAYERS OF FINE TO MEDIUM SAND GRAY FINE SANDY SILT CRAY SILTY PINE TO MEOUM SAND TRACE COARSE SAND BROWN PINE TO CQA RSE SAND TRACE FINE GRAVEL PINE BAND TO COARSE GRAVEL CREENISH-CRAY PINE TO MEDIUM SAND WITH SOME COARSE SAND AND TRACE SILT GRADES WITH SOME FINE GRAVEL PINE GRAVEL AND CLAY IN WASH CRAY FINE TO MEDIUM SAND AND FINE GRAVEL WITH TRACE SILT GRADING WITH SOME COARSE SAND AND TRACE PINE GRAVEL i CRAY MEDIUM TO COARSE SAND WITH P TRACE PINE SAND AND GRAVEL CRAY PINE TO COARSE SAND WITH SOME GRAVEL AND TRACE SILT GRADING WITH LAYERS OP CLAYEY SILTY FINE SAND CRAY SILT WITH SOME PINE SAND AND CLAY mm t CREENISH-CRAY CLAYEY PINE SAND •I- SLKiHT CAS ODOR BLUISH-BLACK SILTY CLAY WITH PINE TO MEDIUM SAND STRINGERS BORING COMPLETED AT 96 9 PEET ON 5 - 6 - 81 GEOPHYSICAL LOG teSEsitiaoftr 4—I |ftMEs!-HDDRt ' " i— '.MVKDU J 1 EwtVHON - 1_ u tmnm m • pu nap* > 4 i m m .4W -m-ws • ilw — -TBS-—i ww i—<sifcp<w-.4w> BORING NO D-5 COORDINATE S • E 12.7189 N 9974 3 PLATE A-68 BORING D-IO CLCVATKJN 4217 0! FEET 20- • 2S 30- • P 39 9%-80B P GM IFILLl CL CL ML SM CL BROWNISH-CRAY GRAVEL SAND SIL S ANO CLAY TlLl.) WATER LEVEL AT 2 10 FEET ON 11-19-81 CREENISH-CRAY SILTY CLAY WITH TRACE PINC SAND BROWNISH-CRAY CLAY WITH TRACE SILT AND SAND BLACK MOTTLING BETWEEN 8 S TO 18 S FEET CHEMICAL OOOR GRADES WITH SOME SILT BLUISH-GRAY SILT WITH SOME CLAY AND PINE SAND MICA PRESENT BLUISH-CRAY FINE SAND WITH SOME SILT AND CLAY MICA PRESENT GRADES WITH TRACE SILT AND CLAY BLUISH-GRAY CLAY GRADES WITH GREENISH-GRAY CLAY WITH SOME SILT GRADES WITH TRACE PINE SAND GRADES WITH SOME PINE SAND GRADES WITH SILTY CLAY WITH TRACE FINE SAND (CONTINUED) BROWNISH-GRAY PINE TO MEDIUM SAND < CRAY SILTY CLAY MICA PRESENT BLUISH-CRAY CLAYEY SILT WITH SOME PINE SAND GRADES TO PINE SANDY SILT BORING COMPLEI ED AT 97 0 FEET ON 11-4-81 COORDINATES N aSCS 8 E 9706 4 LOG OF BORING PLATE A-69 If 2 35- z BORING 0-11 ELEVATION 4217 SI FEET • 6 GM If ILL) lllllllll^ ML • 29 ML CL SM CL BROWNISH-GRAY GRAVEL SAND SILTS ANO CLAY WATER LEVEL AT I 90 PEET ON 11-19-91 CREENISH-CRAY PINE SANDY SILT TRACE OF CLAY MICA PRESENT BLACK MOTTLING AND CHEMICAL OOOR BETWEEN 9 0 AND 17 0 FEET GREENISH-GRAY SILT WITH SOME PINE SAND TRACE OP CLAY CRAY SILT WITH SOME FINE SAND AND CLAY DARK CRAY CLAY WITH TRACC SILT BROWNISH-CRAY FINE SAND WITH SOME SILT AND CLAY BLUISH-GRAY CLAY WITH SOME SILT CL CRAY CLAY WITH SOME SILT (CONTINUED) CRAOES TO SILTY CLAY GRADES WITH TRACE FINE SAND GRAY CLAYEY SILT WITH TRACE PINE GRADES TO SILT WITH SOME PINE SAND BORING COMPLETED AT 114 5 PEET ON 11-5-81 COORDINATCS • N aS6S 2 E aasi 0 LOG OF BORING PLATE A-70 WELL CONSTRUCTION BORING D-28 Z40— WELL CONSTRUCTION CL BROWN CLAYEY SILT ROOTS MOIST- > MEDIUM STIFF (TOPSOIL) ^LKiHT GRAY SILT WITN TRACE FINE SAND VARVED SILTY CLAY AND SANDY SILT LENSES WET-SOFT LMHT CRAY TO CRAY SILTY CLAY WITH SOME CLAYEY SILT ANO FINE SANOY SILT LENSES WITH RUST COLORED MOTTLING WET - SOFT TO MEDIUM STIFF GRAY FINE TO MEDIUM SAND WITH SOME SILTY FINE SAND LENSES WET - MEDIUM DENSE GRAY SILTY CLAY WITH OCCASIONAL CLAYEY SILT AND SANCY SILT LENSES WET - MEDIUM STIFF GRADES DARK GRAY IN COLOR WITH LITTLE OR NO SANETC SILT LENSES BORING D-28 (CONTINUED) ELEVATION LIGHT GRAY SILTY PINE SAND-PINE SANDY Sa.T WET - MEDIUM DENSE GRADES WITH SOME CLAY LMHT CRAY SILTY CLAY WITH SOME CLAYEY SILT LENSES WET - MEDIUM STIFF BORING COMPLETEDAT 102.0 FEET ON 11-19-94 DARK GRAY SILTY FINE SAND WET- MEDIUM DENSE GRAY TO DARK GRAY SILTY CLAY- CLAYEY SILT WITH SANCY SILT AND SILTY SAND LENSES WET - MEDIUM STIFF KEY TO PIEZOMETER CONSTRUCTION Tr2— V* OULECMEOUU 40 R« rrt wmmt tumirr GRADES WITH A SILTY FINE SAND LAYER AT 71 0 FEET GRAY SILTY CLAY WET - STIFF -Vht eu. tO€DULC 40 PVC nK WITH aoro-HCH •Lon MO mmri wnup KEY TO SAMPLING PE ^ SLOW COUHTS PULD MOISTURC OKY DCNSfTV WkMFLMS TVKS AND BLOW COUNTS U TirPE tAMPLCR AND NUMBEIt OP BLOWS RCOunCDTO ORIVC SAMPLCR ONE POCTT USMG A t4D POIMO HAMMER OROPPMC JD MCHES (P« MOtCATES TH^T A THH WALLED CXTCHStON WASATTACHEDTOTHE U TYPE AMPLER AND WAS PUSHED TO OBTAM RECOVERY OP SAMPLC - DENOTES SAMPLMC ATTEMPT WfTH NO RECOVERY -DENOTES IMOaTURBED SAMPLE - spurr SPOON SAMPLER - DENOTES DffTURBEO SAMPLC AND NUMBER OP SLOWS RCDUnCD TO ORIVC SAMPLER ONE FOOT USMB A 1« POUND HAMMER OROPPMS JB MCHES LOG OF BORINGS Dames & Moore PLATE A-71 wEa CONSTRUCTION BORING D-33 ELEVATION WELL CONSTRUCTION BORING D-33 (CONTINUED) 39—I 2 40—E SO—E 112 a 9 117 • 10 CL SM- ML ML CL SM ML SM- SP BROWNISH-GRAY TO LIGHT GRAY CLAYEY SILT WITH SILTY CLAY AND SANDY SILT LENSES MOIST - MEDIUM STIFF OLIVE GRAY SILTY CLAY WITH CLAYEY SILT AND SANDY SILT LENSES WET- MEDIUM STIFF GRAY TO DARK CRAY SILTY CLAY WET- SOFT GRADES LARK CRAY IN COLOR WITH OCCASIONAL HNE SAND LENSES GRADES GRAY IN COLOR GRADES WITH OCCASIONAL SILTY FINE SANC LENSES GRAY SILTY FINE SAND-FINE SANDY SILT WET-LOOSE GRAY SILTY CLAY-CLAYEY SILT WITH OCCASIONAL SILTY FINE SAND AND SANDY SILT LENSES WET-SOFT GRAY CLAYEY SILT WITH SANDY SILT LENSES WET-MEDIUM STIFF GRAY SILTY CLAY WITH OCCASIONAL SANCY SILT AND CLAYEY SILT LENSES WET - SOFT SANCY SILT LENSES GRADE OUT GRAY SILTY FINE SAND AND FINE SANDY SILT wrm CLAYEY SILT AND SILTY CLAY LENSES VARVED WET - LOOSE DARK GRAY SILTY CLAY WITH OCCASIONAL CLAYEY SILT SEAMS WET - MEDIUM STIFF TO STIFF GRAY SILTY CLAY WITH SOME CLAYEY SILT WET - STIFF GRADES WITH OCCASIONAL SLTY FINE TO MEDIUM SANDAND SANOY SILT LENSES AN D LAYERS AT 94 0 TO 85 S FEET GRADES WITH SILTY FINE TO MEDIUM SAND LAYER AT 90 9 T091 0 FEET GRAY SILTY FINE TO MEDIUM SAND WET- MEDIUM DENSE GREENISH-GRAY TO GRAY SILTY CLAY WfTH CLAYEY SILT WET - STIFF GRADES wan SILTY SAND LAYER AT 100 0 TO 101 5 FEET BORING COMPLETED AT 101 S FEET ON 11-27-94 KEY TO PIEZOMETER CONSTRUCTION • iM 01* fc.coua 40 --KNTOWTE tUMWt -Vl-t DULKWIKU 40 WITH aCW-WCH •Lon we mmri wnv GRAY PINE TO MEDIUM SAND WITH SOME SILT AND WITH OCCASIONAL SILTY CLAY LENSES WET - LOOSE KEY TO SAMPLING aAMn.MGTVKBUM COUNTS • 1% DC FIELD MOflTlME^ ^ DRY OENSITY SAMPLMC TVPES ANO W.OM COUNTS •« tr a« — U TYPE SAMPLED ANO NUMSEK OT B4.0W6 NBDUMED TO CfttVE SAMPLE* ONE FOOT USMG A I4D POUMOHAMMEM OROFPMG » MCHES fP* HOK^TES THAT A THM WALLED EXTENSION WAS ATTACHED TO THE U TYPE SAMPLER AND WAS PUSHED TO OBTAM KECOWIY or SAMPLE OCNOTES SAMPLMC ATTEMPT WITH NO HECOVCRV KNOTES tMOOTUNBED SAMPLE SFLIT SPOON SAMPLEN OCNOTES DttTUNBED SAMPLE AND NUMBER or BLOWS KEOUWEO To ERIVE SAMPLER ONE FOOT USMCA \m POIMDHAIMMER OROFrMG S MCHES LOG OF BORINGS Dames & Moore PLATE A-72 BORING D-35 coNsrmicTiON ELEVATION 4237 6 COORDINATES N 11620 1 E 12917 3 10— 20— Z 40— 78- i ^ I. mn US. • 90 •lOOJ 99 ML SM- ML SM GM CL SM SP DARK BROWN CLAYEY SILT WITH TRACE FINE SAND - TRACE ORGANICS TO 10 INCHES - STIFF BROWN CLAYEY SILT WITH TRACE FINE SAND - INTERLAYER SEQUENCES OF SILTY FINE SAND - STIFF WATER LEVEL AT 1.1 PEET ON 3-9-94 GRADING WITH LAYERS OF SILTY FINE SAND - 1/8 TO 3/8 IN THICKNESS BROWN SILTY FINE TO COARSE SAND AND GRAVEL - DENSE MEDIUM DARK GRAY SILTY CLAY STIFF GRADING WITH 1/8 STRINGERS OF SILTY FINE SAND GRADING WITH TRACE FINE SAND GRADES WITH 1 5 TO 2 LAYERS OF SILTY FINE SAND GRAY SILTY FINE SAND - MEDIUM DENSE GRAY FINE TO CCMRSE SAND AND GRAVEL WITH TRACE SILT - VERY DENSE GRADING WITH LAYERS OF FINE TO COARSE SAND GRAY FINE TO COARSE SAND WITH TRACE FINE AND CCMRSE GRAVEL AND SILT - VERY DENSE CRAY SILTY CLAY WITH OCCASIONAL STRINGERS OP SILTY FINE SAND - STIFF BORING COMPLETEDAT 76 0 FEET ON 3-16-84 LOG OF BORINGS Dames & Moore PLATE A-73 coNsrautrioN BORING D-36 coNsmitTioN BORING D-36 (CONTINUED) 20 : i 1 Z40- 70- • S BIS • 29 Ml. LK3HT CRAY SILT WITH SOME FINE SAND AND TRACE CLAY MOIST - SOFT LWHT CRAY CLAYEY SILT WITH SILTY PINC SAND SANDY SILT ANC SILTY CLAY LENSES VARVED WET-SOFT GRADES CRAY IN COLOR WITH RUST COLORED MOTTLING CL B2 07 ML CL SM DARK CRAY SILTY CLAY WITH OCCA- SIONAL CLAYEY SILT AND SILT LENSES WET - VWY SOFT GRADES CRAY IN COLOR DARK CRAY TO BLACK SILTY CLAY- CLAYEY SILT WET - SOFT GRAY CLAYEY SILT WITH SANDY SILT SILTY FINE SAND AND SILTY CLAY LENSES VARVED WET-SOFT GRAY SILTY FINE SAND-FINE SANDY SILT WET - LOOSE GRAY SILTY CLAY-CLAYEY SILT WITH SOME SILTY FINE SAND AND SANDY SILT LENSES GRAY BILTY FINE SAND WET - MECIUM DENSE *-GRAY SILTY CLAY-CLAYEY SILT WITH SILTY FINE SAND AND SANOY SILT LENSES WET-SOFT GRADES WITH IS INCH SILTY FINE SAND-SANDY SILT LAYER DARK GRAY SILTY CLAY-CLAYEY SILT WET - SOFT GRADES CRAY IN COLOR GRADES MEDIUM STIFF GRAY FINE SANDY SILT WITH CLAYEY, SILT LENSES WET-LOOSE GRAY TO DARK GRAY SILTY CLAY WITH OCCASIONAL CLAYEY SILT LENSES WET - MECIUM STIFF GRADES WITH CLAYEY SILT ZONES GRADES DARK GRAY IN CCLCR GRAY SILT WITH SOME CLAY WET- STIFF GRADES WITH SOME RNE SAND BORING COMPLETEC AT 101 S FEET ON 11-20-84 GRAY SILTY FINE SAND WET - MEDIUM DENSE CRAY SILTY CLAY WET - MEDIUM STIFF KEY TO PIEZOMETER OONSTRUCTIOW iM DUL KHEOULE «0 pw npc nTOIETE tuon Vt-Z DUL tCHEIXU 40 PVC PIPE WITH OO^HNCH SLOT! ANO iSnPI WRAP KEY TP SAMPLING MMFLMO TYPE -v ^ BLOW COUHTS • 1% D« FKLO MOIBTURE DRY OCNSTTY BAMPLWC TYPES AND BLOW COUNTS - U TYPE SAMPLER AND NUMBER OF BLOWS REOUMEDTO EfllVE SAMPLER CME FOOT USMCA t4D FOUND HAMMER OROFPING K MCHES (F« MDKATES THAT A THM WALLED EXTENSION WAS ATTACHED TO THE U TYPE SAMPLER AND WAS PUSHED TO OBTAM RECOVERY OF SAMPLE DENOTES SAMPLMC ATTEMPT WITH NO RECOVERY OCNOTES UMDOTURBEO SAMPLE SPLIT SPOON SAMPLER CCHOTES DISTURBED SAMPLE AND NUMBER OF BLOWS REOUMEDTO DRIVE SAMPLER ONE FOOT taata A IJO FOUND HAMMER CROFPMC X MCHES LOG OF BORINGS Dames & Moore PLATE A-74 BORING AG-I BORING AG-2 ELEVATION li! Zs- I SI BROWN SILT WITH SOME VERY PINE GRAINED SAND ANC CLAY CALCAREOUS MTERUAL BETWEEN I ANO 2 PEET BLUISH-CRAY SILTY CLAY WITH THIN VARVED LENSES OF BLACK OILY CLAY AND BLACK VERY PINE GRAINED SILTY SAND HYDROCARBON PRESENT WATER LEVEL AT 3 9 PCCT ON 8 9 84 Z B- UGHT BROWN SANOY SILT WITH SOME CLAY WATER LEVEL AT 9 2 PCET ON 9-9-«4 BLUSH-CRAY SILTY CLAY VARVEC WITH BLACK HYDROCARBON STAINING OF CLAY AND THIN LCNSES OF VERY PINC CRAINCD BILTY SAND BORING AG-3 BORING AG-4 zs- LKSHT BROWN SILT WITH SOME VERY PINE GRAINED SAND AND CLAY (FILL) , -WATER LEVEL AT 6i9 FEET ON 9-9-94 LIGHT BLUISH-GRAY SILTY CLAY WITH SLIGHT HYCROCARBON ODOR AND OCCASIONAL THIN BLACK LENSES OF VERY FINE GRAINED SILTY SANC - MOIST ZB- LIGHT BROWN SILT WITH SOME FINE GRAINED SANC AND CLAY (PILL) WATER LEVEL AT 4 1 FEET ON CREENISH-GRAY SILTY CLAY BORING AG-5 z s- I 1^ |^|_ LIGHT BROWN SILT WITH SOME VERY (FILL) FINE GRAINED SAND AND SOME CLAY ^/WATER LEVEL AT S 9 FEET ON 9-S-94 GREENISH-CRAY SILTY CLAY 10- J' i LOG OF BORINGS Dames ft Moore PLATE A-75 REFINERY AREA BORE LOGS AND MONITORING WELL CONSTRUCTION DATA WELLS EF-10 TO D-34-OD I DEC 0-12-11PM SLR OFFICE SERVICES EARTHFAX ENGINEERING. 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INC DRILLING LOG PABC I or Pi-ejacf Mama eKOUNOUATCft CHARACTCRZZi^rjOM 0>«^ci-/Cli«M' CHCvnON USA. SALT LAKE CITT. UTAH Saring/l/dM Humbtn If-li Boring/Uall Leastian 8BTB 1( C 11T21 03 N ProjBet Nunbari UC-li3«24 Rareranea Clavetien> <li 13' RBrarenea Paint BMOUNO BURTACC OoTB On Had 0V23/91 l-egg»d By Trt Or) II Ins CantreetoT' ZinnCfVlAN UEU, BCRVICC On 11 Ina rwthad< HOLLOU BTCn AUBCR Rig Type MOBIL B-« rirat pccurranea er S U ' 9 Btatie U L ' VOB i3' Detaa rieesurad 0i/e3/91 0VZ3/91 •aring Depth (ft)' JB' Waft Depth (ft)' 1» 7' Bering DIeaatar (ln)i 7 78" I i L2TH0L0BIC OCBCRIPTION 1 AND 0B6CRVATI0NS ILtT Cl»T fia't Mdiu* to high alaaTialty iOyr I/t ta ft te 9/« Wtrr CLitr n«<n rayar* aT rin* aone, ttier ntah alwatitity OMlaoTlen'raduaiian •tainlng 9y WZ, aliva gr«y ilLTT CLATi Baal I II aal nsdulaa or alay BaTt. high plaiTlnTty Sy S/( tmO Vary fina gra nsA unirera, aiaaaaaira By f/t 8ILTT gN« Troee eloy Band 18 »a<*y rina grained. aloeaaowiB BANS Vary Pina gramad unlFaro, aiaaaaaua Sy t/t CLATi Vary aaFt ond atleky Sgy VI dark graanlah g B^ND Pina BTBiPfld. alaaaaauB Troaa alay dork graBniah grey and alM tgh VL UCLL COnPLmON 0CTAIL8 ' Bantonlta Baal ' (• PVC Caalr«, Behadula dO • tO-« daah Band ' k* Pve lO-Blot Bara ' Thraodad Cnd Cep 'Collapead nefarlal DEC 03 '93 12*12PM SLR OFFICE SERVICES P 4^23 EARTHFAX ENGINEERING. INC DRILLING LOG PAflc 1 or c Prajeet MoBiei 6R0UN0UATCR CHARACTCRIZATION OMnar/Cltant CHCVRON USA SALT LAKC CITT. UTAH Baring/Uall MuBiben Cr-12 Berine/Uall Laeotien- B922 B9 C 109« 95 N Prejaat Nwnban Ue-1^3-2^ RePeranee Clevetlam 411 BO' ReParanea Pelnt< BROUNO BURPACC Oete Drilled' 05/22/91 Legged By' TM DrI 11 Infi Centreeter ZZnnCRrlAN UCU. SCRVICC OrlllIng nathed' HOLLOU BTCH AUBCR Rtg Typai nOSiL rirat eeeurTance eT S U • 4 Stotie U L < «0T BO' OolBB neoBuredi 09/22/91 OS/22/91 Bering Depth irt)t 33' UBH Depth trtli 33 Bering DIemeter (<nl< 7 79' LITHOLOOZC OCBCRIPTION ANO OBSCRVATX0N8 CLAT ANO BILTt Organia aaiarial High ples*lalTy dsap* BtLTT O.AT rira, Aigh pleatlelty CkAT Pirn, high ploatlalTy BaM oaidoTian-rasstian eTalning Aa abe«a Huah eaFtar AB ebo»a celar ahanga Troaa lilt Very rino, blaeky aTrueTura CLAT UITM TKFICC BAND Pirp, high plaaflaiTy grained •iisacaauB CLAT BOTT high ploatieity <a vary fine tILTT BMID Vary rina grained BM«T SILT Dark gray ta block Met Pira Thinly Bedde* with • Mt> aond sTringcra (light gray aeme aork oeTTling m ailiy retianal Band la rine auSonewler grairae Nlnr if veroing 01 epqciny I UCLL COnPLCTZON DCTAIL6 ' t' PVC eoaln» Bchodula « •Banaanlia Baal *<wv. i.^ .^.^ri I ^i_r^ wr r x^u su^vj,v.c.9 EARTHFAX ENGINEERING. INC DRILLING LOG PABC 2 or 2 Project None' BROUNOUATCR CHARACTCRIZATION Oufitr/Clianf CHCVRON USA SALT LAKE CITT UTAH Berlng/Uell Nimben Cr-lZ Bering/Uall Leeatleni 8522 M C 109dQ 95 N Prejaet Ngaiberi UC-1^3-2^ Rererenee Clevetiem ^11 BO' RBrerenea Painti BROUNO BURrACE OotB Orilled- 03/22/91 tyCflgad By Tw Dri 11 Ing Contractor ZinnCRIViN UCLL BCRVICC DrlllinB nethod HOLLOU BTEW AUBCR Rig Type tlOBIL B-^0 riret eeeurrence or B U Btatie U L > VOT 60 Oolae neoau<-Bd. 09/22/91 05/22/91 Bering Depth irtI> 33 Bering Oieaatar (Inli 7 79' Uell Depth (rt)i 33 LITHOLOOIC OCBCRIPTION ANO OBBCRVATIONS BMCT SILT Cant I owed Traa pra>iauB pope SILTT BAND' bight to dark flray Mat danaa Uell groded CLATCT BtuT Light te dork gray Mt aoft ION pieatiaity flrodlng ta eiKy eand BILTT BANO Light gray vat laaae ta tiedl Bufaangular aand graina vary uniFara ua deneity Pine CLATCT BILTi Aa Treik BT ta tB 9 BiLTT aMO> AB Praa SB S Ta )1 B i UCLL COnPLCTION OCTAILB ' Bantanlta Baal • e* PVC Coalnft Behadwia tO ' SO-dO Itaah Band t* PVC iO-Blat Bora ' Threaded End Cap EEC 03 '93 12-13PM SLR OFFICE SERVICES P.e/'23 EARTHFAX ENGINEERING. INC DRILLING LOG PABC 1 or 2 prejaet Noew BROUNOUATCR CHARACTCRIZATION OMtar/Clianti CHCVRON USA, SALT LAKC CITT UTAH Berlng/Uell Muefaan EF-13 Bertng/Uall Leeetiem 7979 26 C 10168 79 N Prajeet Numberi UC-li3-2i RaParanee Clavetloni 411 99 RaPerenee Pelntt BROUNO BURPACC OoieOrillad 05/17/91 Loggad By> TH Dri 1 ling Centreeter• ZlnnCRflAN UELL 8CXVZCC On 1 ling nathed> HOLLOU B7en AU6CR Rig Typat nOBXU t'^ rif-at eeeurrence oT S U i i' ttetle U L • ^7 SS OeTae naee«<red> 09/17/91 05/17''91 Bering Depth irt)• 27' Uell Depth IPTI' 27* Boring Olometer llnl- 7 7S" c«xo*eA i i LITflOLDCIC OCBCRIPTION ANO OBBCRVATIONS SILTT CLAT Oe«p aadiua Btirr high plaatialty lOyr B/J, Aa aba«a t Syr S/l gragptah erowi BANOT OLAT U\ff> plaatialty BBM Battling Bend la Pina grained S Syr S/t CLATi Aediua atirr hlflh ploiTlelty Sy 9/1. grey Aa obooe Cgy (/I. grecniah gray Ae aba«a 1" Bilty aond layara e« U T end 19 T ary Pine grainal aiaaaaawa Grading btaek I By S/0 la Aa aka>a Sy n/^ dark gray Aa akaoe rea thin U 1/B'l very fine eand leneae aba>a SaPt uca COnPLCTION OCTAltB ' B* PVC eaaing. Benaduia « ' BantamVa Baal C PVC 10-Blat Baraen BB'to Itaah Band I I DEC 03 '93 12-14PM SLR OFFICE SERVICES EARTHFAX ENGINEERING. INC DRILLING LOG P 7/23 PA8C 2 OP 2 Project NOBie BROUNOUATCR CHARACTERIZATION 0»nar/CIlanti CHCVRON US\ SALT LAKC CITT UTAH Berlng/Uell Number Cr-13 gerlng/Uall Laeetion 7979 2& C lOlBB 79 H Project Number 1 UC-1^3-2i Rareranea Clavetlem ^11 95 Rererenee Point BROUNO BURPACC Dote Drilled 05/17/91 leeoad By> Tn Or 111 ing Centreeteri ZinriCRnAH UCtL ICRVXCC Orillmg nethedi HOLLOU BTCH AUGCR Rio TyPB> nOBIL t'^ Piret eeeurrence eT G U i i' Btatie U L < ^207 59 Oataa Haeauradi OS/17/91 09/17/91 Bering Depth iPtI 27' Uell Depth (Pt)i' 27 Bering Diameter Iml 7 79' I J. i LZTHOLOSie DESCRIPTION AND OBBCRVATIONS CLAT ContTrCed PraM praoieua pa»e BILIT BANC vary fine groined, niaaeaaw*. leaaa BANDT ClATi Vary Plna groined, aiaataaua. aaPt high pleetieity Aa aaa«a nedlua ttlpr i»HO Vary rrna ta Pine eromad arainad IPilPera. alaoeeeua 9y n/\ continuaa Pro* li TO t" BANOT CLATi nediua atiPP tiadiuA ta high plaatialty Bend is very rina grained, aieacaaua )B i UELL COHPLCTJON DETAILS ' V Pve lO-Slat Baraen ' BS-« Itaah Bond Cop TD DEC 03 '93 12 14PM SLR OFFICE SERVICES P B/23 EARTHFAX ENGINEERING. ZNC HY0R06E0LQSIC LOG PABC 1 OP Prejaet NeMi CHCVROM SRCUNO UATCR HOOCL Ownar/CI lent' CHCVRON U B A SALT LAKC CITT. UTAH BaP>lng/Uali Nymbari Cr>13-0S Bering/Uall Leeetiem 10. 1S9 94 N 7971 M C Prajaet Niabari UC-17S-15-01 RoParanaa Clavatlani Wl 92' RaTaranea PointJ TOP DP CASZNS Data Orilladt 9 KC 1991 Legged Byi «IRP OrtIIing Centreeter' AOVANCCO AUBCR ZHC Ori 11 Ing Hethadi HOLLOU BTCn AUBCR Rl* T^pa Pirat aaawrranaa eT 6 U • *pp 4* Stetie U L < B 99* Oetae heaauradi 9 OCC 91 18 JAN 9C Baring Depth iPt)i 32' Wall Depth IPt) i 31' Bv-ing Oieaietcr lln)i 10 1/V tt- I t > " >f 'ill 10- K 11 10— LZTHOLOGXC OCSCRZPTZON AfO OBSCRVATI0N8 klL'T CLAT Dcgoaienql thin aene laneee neiet gr (10 TH B/ai ler ahangaa to yay (10 TR 8/1) at abasit 8 Paat turatad kZLTV IANA I AltarnoTea batwaan ailt aond, one Rcdiua to Pina grained _ nieaeeeua Mlth HCt Brey (10 TR 8/31 el Ity ^SKT Raoeta 90- UCLL eonPLCTZON OCTAILB • Bantanita Bee I .t* pve Coaln^ gahadula ^ .20-4 naB^ Biliaa Band .2* Behadula « PVC 0 010* Slat Baraen .Thraodod tnd Plug CHEVRON USA i i DEC 03 '93 12-14PM SLR OFFICE SERVICES EARTHFAX ENGINEERING. INC DRILLING LOG P. 9/23 PASC X or 2 Project Weae BROUNOUATCR CHARACTERIZATION Owner/CI lent CWVRON U9^ SALT LAKC CITT. UTAH Berlng/Uell Nuaiben CP-l^ Bering/Uall Leeetiam 7978 84 C 8789 93 N Project Number 1 UC-ld3>24 RaPeranea Cla«otloA' 4211 92' Rareranee PelnTi OROUNO BURrACE Dote Drilled' 05/21/91 Legged By< GU Ori 11 ing Centreetor< ZXrvCRnAN UCLL SCRVZCC Drilling Hathod' HOLLOU BTCH AU6CR Rig Typc< ROBZL 8-40 rtret eeeurrence eP 6 U i 2 3' Stotie U L < ^09 82 Oeiea nooeured 05/21/91 09/21/91 Bering Depth irt)• 34 Uell Depth irt)> 33 Bering DIemeter (in)i 7 75' LZTHOLQOIC OCBCRIPTION PirO 0B8CRVATI0H6 CLATCT SILT Oiiv* to light alive heitt .ery atlPP ta hord Priapla flceoBianal Pina eondL raeta Bradai leae aond plnettc p a«n • t 0 • S B TBI firoding to eiity eand SILTT BAND Dark al gray t» bra>n Uat lee»B rme ta aadluB groined taaaalanal thin alay Icnsta aaae raata. Mil graded SILTT CLAT Llgnt al l«e groy B/& vary aaltt aoPt nediun pleaiiaity Oeeaalonel eiity eiringere p pan « <0 ZS TSP g*>C Olioa A/a, net laaaa. Pina ta aaditm gramad ru«t aettl Ing SIL*T CLAT Pale ailoe B/3 aaPt aadiba piaaTieity Oaeaelanol thin eilty atrlngara p pan i (0 tS TSP Upper 0 A ae*ieeotad and 81 Mr oroaes vary wnlPerik. no ailfy etringtra Aa above Slightly aare ploBtle above Sradta ta vary dork grey p pan • 0 T9 TSP AB above p pan • <0 IS TSP Aa obava Brodea Bilth aare ailt olightly laaa aalat laia plaatia UCLL COnPLCTION OCTAILB /// m // 4 /// / / / •'//, /// /A 44/ BANO Oork gray ta black Uct aadlua dtnaa. Pine ta aadlua groined CLATCT SXLT Black MT aept lea plaatialty Oeeealenol vary thin aond lenaaa Clayey ailt as abave Hint aP varving ' C pve Coalng Behadwia AO ' Bantanita Baal lew 3ci ic i^rri auK ur r lut SitKViULS EARTHFAX ENGINEERING. iNC DRILLING LOG PAGE 2 or 2 Project Nemei GROUNOUATCR CHARACTCRIZATZOM Owner/Client CHCvRON US^ SALT LAKE CITT UTAH Boring/Uell Numberi cr'14 Berlng/Uell Lecetien 7978 64 C B7B9 93 N Prejeet Number UCvl43-24 Rererenee Clevetlem 4211 92 Rererenee Pelnti GROUND BURPACC Oeta On lied OS/21/91 Legped By< GU Or i11Ing Centreeter ZlfWCRHAN UCIL SCRVICC OrlllIng nathed HOLLOU STCn AU6CR Rig Typa< flOSIt 8-40 riret ecewrrpnee or 6 U i 2 3' Static U L > 4209 82 Oatas naeBLiradi 05/21/91 OS/21/91 Bering Depth (Pt)i 34 Uell Depth IPtI • 33' Bering DIeaeter |in)i 7 75' in LITHOLOOIC DESCRIPTION ANO 06SCRVATI0N8 CLATCf IILT CanTinwad Praa praviaua page Aa obava Laaa aond Thiakar verve* SILTT tffO Oork gray te bleak uat nadl aedluw gramad, well UK denaa Pine ta SILTT SANQI Dark gray ta bleak net vary dense Pine gremad bniPora aATCT SILT BIl-TT SAhO Dork gray 1 9 tone / aquora Poet CLATCT SILT' UCLL COnPLCTION DETAILS ' gantanite Beol • t* PVC Caalng Schedule « BO**) Heah Band B' PVC IQ-Blat Baraen Thraodad Snd Cop tO-dO naah Bond i i DEC 03 '93 12-15PM SLR OFFICE SERVICES EARTHFAX ENGINEERING. INC DRILLING LOG P 11^3 RAISE 1 or 1 Prejeet Heme BROUNOUATCR CHARACTERIZATION Owner/Client CHCVRON UB^ SALT LAKC CITT UTAH Bortng/Uell Numban CT-IB Bering/Uell Leeetiem 8879 84 C 6014 28 N Project Number 1 UC-143*24 RaParanea Clavetien 4211 89' RaParanee Point BROUNO BURPACC Oete on lied 06/27/31 Legged By Th Drilling Centroeton ZimCRriAN UELL BCRVJCE Drilling hathed HOLLOU 8TCn AUSCfl Rig Typei nOBlL •'40 rtret eeeurrence oT 8 U > 3 5' Static U I > 4207 79' Ootae fleoeuredi 08/27/91 06/ZT/91 Bering Depth (rtl> IB' Uell Depth (Ptli 11 77 Boring Diameter (In>i 7 75" s LITHOLOaZC OeSCRIPTION AND OBSERVATIONS ClAfCf SILT Orgonio. raota. aediun pteetiaity ia>r 3/1 very dark gray UCLL COnPLCTION 0CTAIL9 1 .'//, /// I /// /// /// 1 BILTT IANQ Bo»t tier Lou ta atdiUB aleetlelty Band la very Pine greinae aieocaeua vary eioiBt Br Vl alive gray SILT WITH TRACC CLATi Traee Pine grained aane Law ploatlclty aaae raata Sy t/S, pole yallaw BILTT CLAT Bleeky ttrueture riedium ta high pleaTieity By V3 BANS ilediua to aourae grained aub-angular lae>c Br B/l al iva Aa above niceaeaws As abave 3 iiM at • 9 -B T Bg VI Bark ^Benieh gray BILTT CLAT BoPt atiaky vorved BOg VL Dork graeniah Qroy SILTT CLAT troee Pine aond Calar ahanga By VI. Dark gray SILTT CLAT' Slightly Blacky arruetura Pine Drained aond lanaae. «^ ta t tfireugneut Bg Vl oork graeniah grey BILTT CLAT I Vervad BePf, high pleat lolly 9g i/I. dark graeniah gray ' BentonIte Beol •V PVC Coaing Behadula W • SO-40 Itaah Band -S- PVC 10-Blat Screen Thraoded Cnd Cap Calepaad Hatarial TO i I X£C 03 '93 12.16PM SLR OFFICE SERVICES P.12/23 EARTHFAX ENGINEERING. INC KT0R0GE0L06IC LD8 PABC 1 or 1 Prejaet Neiie> CHCVRON SROUNO UATCR noOCL Ouner/Cllanf CHCVRON USA SALT LAKC CTTT. UTAH ~ Bering/Uall MLekban Cr*XB 0 g«-lng/Uall Leaetiam 7981 87 N 12.122 37 C Prejaet Numban UC-179'19-01 Reference Clevatiam 4216 10 Rareranea Palnti 70P OP PVC CA8ZNS Date Ori I lad> SS-SB OCT 1991 Lagged by API Ori 11 ing Controeteri ZZHnCRTIAN UCLL SCRVZCCB Ori Ming Rathodi CABLC 700L Rig Typat PIrat oaaurronaa 8 U • — Btatie U L i rLOU:<« Oetae fleeeurcd — ~ Baring Depth IPtli 98 Uell Depth tPt) i 94 79' Bering Diemetcr linli 8 1/4' 10- -? 10- 10- 70- ;,)>] LZTH0L06IC DESCRIPTION AND OBSCRVAnONS SANO nedium te aaerae groined Bwbenguter to angular ; Sand Vary Pino ta Pine ] Bema ooeraa eand and Tina oPtar 10 TCoTTne groval rained nicoaafua grovel dearaaaing SILTT SANOBand la Pine te very rine groined Ooeaatanel enguler grovel up te 1/B* Beeaming mere eiity with depth CLATCT SANO Send >s Pine groined miceeeouB Bono medium te eeerae groined aond and auti- enguler grovel up to i/4* nedium to high plaetleity ^^^^ o pradominontly Pine grained, Sreval la angular up to X/Z* Bond la Pine grained mieaeaeua Borne aond and onguTor gravel up te 1/4' 7r Tree* clay at 75 ' SO CLATCT SANOI Bond ie pradominontly fine groined. •leeeeeue Bene angular grovel up to nadlum te high piestlelty 1/4- SANDT CLAT I Borne eilt Send la Pine grained, •leeooeua High pleetieity 100 CHEVRON USA UCLL COnPLCTION OCTAILB iNeot Cement ,2' Bohedule 40 PVC Ceding .Bantanita Brout .20-40 neeh Billco Send .X* Bohedule 40 PVC 0 OlO* Blot fereen .Threaded Cnd Plug DEC 03 '93 12 16PM SLR OFFICE SERVICES P 13/23 Prejeet Nemei CHCVRON BROUNO UATCR HOOCL Ownar/CIlent I CHCVRON USA, SALT LAKE CITT, UTAH Bering/Uall Number• Cr-17 0 Berlng/Uell Leeatleni 11. US 89 N BltO 80 C Prejeet Nuaban UC-17S-19-01 RaTarenee Clavotioni 4213 35' RaParanee Pelnf TOP OP PVC CACZKB OetaOrilladi S-IS OCC 1991 Ori 1 i Ing Centreoter ZIlWCRriAH UCLL BCRVZCCB Drilling Retlwdi CABLC TOOL Rig T^eai Pirat eeeurrence eP S U i opp 3 Stetlo U L > PLOI'INI B^ Ing Depth IPtI I 120' Ue 11 Depth (Ptl • UB' Bering OlamBter llnli 8 1/4* 10- 40- 80- 100* LZ7H0L0QIC OnCRXPTION ANO OBSCRVATJONS SILTT CLAT Oraenie materiel Oeaieeotien ereeka in upper 1/Z root Pr table Heiet hottled Verv.^. dork brawn (10 TR 2/21 te olive Br-dy IS T B/2> 01 Ive grey IS T 9/21 Local thin lomlnatiane eP aend Pine greir Very derk gray (5 Y 3/11 at 19 Poet nlooi Very Pine groined oond leneee Oork r-ey (10 TR 4/11 Leeellted thin loyare or vary Pine grained aond nethone bubblae up the hole ILOC CONTINUEO ON rOLLPUlNO PA8EI UCLL COnPLCTION DETAILS . Cement .Bantanita Brewt .2* PVC Coelnft Sehedule 40 .80-40 neeh Siliee Send (UELL COHT ON P0LL0UIN8 PABC I CHEVRON U S.A. utx. Wei '3d lei li'Pn bLR OFFICE SERVICES P 14/23 EARTHFAX ENGINEERING. XNC HYDROGEOLOGIC LOB PABC 2 OP 2 Prejaet Naae< CHCVRON BROUNO UATCR nooCL Ownar/CI lent" CNCVROM U B A . SALT LAKC CITT. UTAH Berlng/Uell Mjabon CP>17 0 Berlng/Uell Leootiem 11. lis B3 N giBO go C Prejeet Nunben UC-17S-19-01 ReParanas Clavotioni 4813 35' RaParanee Pointi TOP OP PVC CABINB OataOriliedi 5-15 OCC 1991 Legged by< JRP Dri 11 ing Controeteri ZXftfCRhAN UCLL BCRVICCS Drilling IWthedi CABLC TOOL Rig Type> Pirat oeeupronea eP B U 1 opp 3 Btotio U L • PL0UIN8 Dotce tlaeauradi 8 DEC 1991 Bering Depth (PtlI 120' Uel1 Depth (Pt)• 118' Bering Olemeter lln)i B 1/4' i 100- LZTHOLOBZC OCBCRIPTION ANO 08SCRVATZ0N3 UCLL COnPLCTION OCTAZLS SILTT CLAT (Continued Prom pravieua pegel SANQi hediuB te Pine groined Poorly aertcd Plowing aend letureted 8leek and whi eelores graina • to 110- JQ. V • • I BILTT CLAT Bray (S T S/ll IM— ISO— IBO— 170— IBO— IBO— IUCLL CQNT PROn PREVIOUS PAQC) 80-40 neeh Si I lee Send 2* Sehedule 40 PVC 0 OlO' ilet Sareen Threaded Cnd Plug toa- CHEVRON USA DEC 03 '93 12.17PM SLR OFFICE SERVICES P.15/23 rAR7HrAX CNGZNCCRZNS ZNC HTOROBCOLOaZC LOS PAW 1 SP 1 Prejeaa Na»a< OMCVieN ONOUMO UATCK nOOCL 9»«>Br/ei lanfi CHCVaON U 0 a.. SALT LAKC eXtt. UTAH B«-ln«/Uall Mjmban B-t3*eB Bar'Ina/Uall Laootion 7B^ 03 N 11. 4BB 11 C AaTaranaa Clavoaiani 4S1B W RaParonaa Poinr' TOT OP PVO OABINB Sate Brilladi SO BCPTCHBCR IBBl Laeaed gvi An Dri 11 ing Canfraatori ZZnncnmN UtUL BCRVXCCB Dri t 1 Ine Bat^od' HOLLOU gtW AUBCR RIO T*pa. ~ Piraf maaurranaa aP • W i —• STotia U L t —» Boring Daprh IPtli IM 9 Hall Poptn IPal • OS Borlna piamaTar llnl T ^^d' IS— to— l.2TM0Le«Ze OCSCRirtzON AN8 eBBCAVATSONa flAN-PLACED riLL- up te 1' brown pina te medium aond end rounded grovel 9ZLTT SANOI Send Pin^ areoaaeue with troee cloy end Plr rounded gravel Uet Srodee to grey at 4 8ZLTT CLAV> Troee eP aend Bert 01 ive grey 23- UCLL eonPLCTXOM BtTAZLS • BentonI TO SaoI .f PVC Coain^ Behadula 40 .80-40 neeh Bit lee Bend .2' Bohedule 40 PVC 0 010' Blot Bareen •Threaded End Plug PUe\/DP%M 11 C A i i I CIO 30 j,c*irrri 3L.r^ wrriL-t. 3C.I^VIL.CS r. lo/^cj EARTHFAX ENGINEERING. INC HYDROGEOLOGIC LOG PAGE 1 or 1 Project Noao< CHCVRON gROUNO UATCR HOOCL Ownar/CI lent! CHCVRON U f A SALT LAKE CITT. UTAH Bering/Uell Hiiaean O-l-CS Berlng/Uell Loeotlom 774S 97 N 10,237 28 C Prajaet Nuaber- UC-17S-1S-01 RePerenee Clevatiem 4214 18' RoPeranee Paint< TCP OP PVC CASIN8 Dote Ori1 lad< 9-12 OCC 1991 Legged byi JRP Drilling Centroetori ADVANCED AUBCR ZNC OrllMno Rethedi H 87Cn AUBCR Rig 7ypai Piret eeourrenee eP 8 U i 8' Stetlo U L • PLWINB Oetee haoavr-ed 9 OCC 1991 B«-ing Depth IPt)• 91' Well Depth IPt) i 90' Bwina OienotBr (ln)i 10 1/4' 0- LITHOLOSIC DCSCRXPTION ANO OBSCRVATZONS "BRAVELT 10- 10- Is r } laeorted rood beae euD-raundad 1* elaata Angular ta SANDY BILT Very Pma groined (10 TR 5/17 Saturated Brey 100- SZLTT CLAY' Beturoted Oork gray HO TR 4/1) ffmT eubunite oP Pine gromad aend el varleue daptna BZLTT 8AM5 tladlun te very rina groined Sri end Hhite oelorad aand grolna In (10 TR 5/1) bleek ailt ICU COnPLCTION OCTAILB iCamant .Bentomte Brout .2* PVC Cooing. Schedule 40 ,20-40 neeh SI Mae Bond ' Bohedule 40 PVC 010' Blot Bereen esSSBlta— - Thraoded Cnd Plug CHEVRON USA vc^ itL-lOfn bUR OFFICE SERVICES P.17/23 EARTHFAX ENGINEERING. INC HYDROGEOLOGIC LOG PABC 1 or 1 Prejaet Nomai CHCVRON BROUNO UATCR ROOCL Ownar/Ctlant CHCVRON USA SALT LAKC CITT. UTAH Berlng/Uell Numberi D-9>00A Bering/Veil Leeotlen' BBSS DS N 11713 t Prajaet Nuaberi UC-179-1S-01 RePerenea Clevetieni 4221 81* RePeranee Pointi TOP OP PVC CABZW Oeta Dri1 led! 8 OCT 1991 Legged by AR Ori 11 Ing Controeteri ZZnnCiVIAN UCLL BCRVZCCB Drilling Hathodi CABLC 70X Rig Typai Pirat eeeurrenee oT 8 U • — Btatie U L • PLOUINS Detaa Heeeured — 11 OCT 91 Berif^ Depth (Pt>i B7' Uell Depth (Pt) • B2 1' Bering DIemeter (inli 8 1/4' 1 10- 20- iO- I »0- TO—C LXTH0L06IC OCSCRZPTIDN ANO OBSCRVATZONS SILTY CLATi . Traeo or mediu" gremed Very dork yey (10 TR 3/1) High ploetieity aond SANOr BILT Intarbedded leyara er aePt aley Pine groined, eieaeeeud Leea aond ISreyiah brehm (2 5 T 9/21 SILTT SANO Sand Ie Pine ta madiui grained eearsa groined aond Troee oT SANO I hadium te coerao groined Hieeeaeue Troee eP Pine groined eend and grovel up te 1>^* Brey IS T S/1) Send Ie Pine groined grove I Seae eiIt end rina Trace or Send la Pine te oeerae groined Troei Oiit ond rine quartz grovel up to 1/4 Xnereoeing grovel uitn depth * 8AN0T SRAVCLi Bond Ie medium te eeoree groined Brevet la L»ort», on( ' - . . DS grovel —u' ty^ I w —iw M > will . w wvM> WW a *,"•—— —• — — • juertfc onguler Appresieotely 70> eon4 Bend le Pine te aaerae grained All elae ae above Borne ollt Bond le Pine te oeeree grained, Predealnently Pine gremod Breval le eunded , . , CLATCT SILT Seme Pine to medium grained eend Oork gray 100 CHEVRON USA UCLL COnPLCTION DETAILS .Neat Cemont .2* PVC Coain^ Schadula 40 .BentonI to Oreut .2' Bohedule 40 PVC 6 010" Blot Sereen .20-40 n«eh Slliee Send DEC 03 '93 12 18PM SLR OFFICE SERVICES P.18/23 EARTHFAX ENGINEERING. INC HYDROGEOLOGIC LOG PABC 1 OP Prajeet Noaei C»CVRON OROUNO UATCR ROOCL Omar/CI lenti CHCVRON USA SALT LAKC CITT UTAH Berlng/Uell tbjmbon 0-9-OOB Berlna/Uail Leeotlen< 99S2 14 N 12. S97 85 C Projeot Number1 UC-1T5-1S-01 RaParenoe Clevotion 4222 40' RePeranoa Pelnti TOP OP PVC CABZNS Oeta Drilled! 29-28 NOV 1991 Legged byi JRP Ori 11 Ing Centroeton ZZnnDVIAN UCLL BCAVZCCS Drilling Hathodi CABLC TOOL Rig Typai Pirat eeeurrence aP B U • opp 3' Stetie U L > FLOUINS Detaa Hoaauredi 25 NOV t 10 OCC 91 — Ba-)ng Depth irt)< 90' Uell Depth trt)i 88' Bering DIemeter Unli 8 1/4* i I LZTHOLOBZC OCBCRIPTION AND OBSCRVATZONS • I 20- aoH BOULOCRS-SANDi Srevely aend oetria Bond ie very Pina te medium groined, peerly eerted Very dark bro-n (7 5 TR Vi l/Zl lOH (0- TO—t BOH 10- lee- SANOY SXLT I Sort Vary Pma grelned Oork breun (7 S TR 3/il onenging te K'X <^0 TR S/ll ot ebeut 20 Poet ORAVCLY SAN0> Altemoting aith eend and thin interboda aP ailty aend Vary Pine te very eaeree gram ol<ee up te 0 79 em Ouert^ eorbonete. ond mice eand Plowing eend Reocte uitn HC' Oroine eelered bleek and uhite SILTT CLAT Arteeien Pla^ Sroy (10 TR 5/1) mm ICLL COnPLCTION OCTAILS .Cement .BentonIta Sraut .2* PVC Cooing Schedule 40 tot Sereen .20-40 neeh Bllleo Send .Thraoded Cnd Plug DEC 03 '93 12 igPM SLR OFFICE SERVICES P 19/23 EARTHFAX ENGINEERING. INC HYDROGEOLOGIC LOG PABC 1 OF 1 Prejeet Neoei CHCVRON OROUNO UATCR ROOCL OKhar/CI ianti CHCVRON U 1 A SALT LAKC CITT. UTAH BerlngAtell Number D-9-0OC Berlng/Uell Loeetiem 9992 24 N 12 702 2S C Prajeet Number. UC-lTS-lS-Ol ReParenee Clevetlem 4221 29' R^aranee Pelnti TOP OP PVC CASINO Oete Ori Had! 28-28 NOV 1991 Loggad byi JRP Dri i t Ing Cantroatar < 2ZnnCRnAN UCU BCRVZCCB Ori11Ing Rathadi CABLC TOOL Rig Typei rirat eeou>renee eP 6 U i opp 3 Stotie U L ' PLOUZnS Detaa neaauredi 2S NOV t 10 OCC 91 Swing Depth <Pt) i 90' Uell Depth (Pt) < BS' Borlna DIemeter (In)• 8 1/4* I 10-1 20- JO—e LZTHOLOGZC DCSCRZPTZON AND OBSCRVATZONS 40—f to-t TO—f M- BOULOCRS-SANO Srevaly eend ootriii Send iaTar^7ina te medium grelnad, poorly ooi-tad Very dork bro»n (7 8 TB t< 2/2) " " ~ ''^ Oork SANOY SILT Sort (? 5 ... ... at about 20 Peet „. . Very Pino gremod VBI-H ^ (7 5 TR 3/2) ehwtging te grey (10 TR 5/1) BRAVELY SANO Altarnntlng with aend ond thin interbeda ar eilty eend Very rme to very eeoree gram Bisea up te 0 T9 em Quartz, eorbonote. and plee Bond rieumg eend Rcootg with HCI Brelne colored block end Mnite BILTT CLAT Artaaien ried Brey 110 TR 5/1) lae CHEVRON U.S A UCLL COnPLCTION DETAILS . Cement .BentonIte Sreut .2' PVC Coping, Sehedule 40 ' Sehedule 40 PVC OlO' Slot Sereen .20-40 noBh St I loo Sand .Threoded Cnd Plug DEC 03 '93 12-19PM SLR OFFICE SERVICES P.20/23 EARTHFAX ENGINEERING. ZNC HYDROGEOLOGIC LOG PABC 1 or Prejeet Neaei CHEVRON OROUND UATCR HOOCL 0-ner/Cllenti CHEVRON USA. gALT LAKE CZTT UTAH Ba>lng/Uel| Numberi 0-34 Bwma/Uell Leeetiem 8084 97 N 799S 42 C Prejeet Nuaban UC-lTS-lS-Ol RaParenee Clavotioni 4213 43' RePeranee Point 70P OP PVC CASZNS Oete Drilled 18-20 DCC 1991 Legged by JRP Ort 11 ing Contraoteri ZlnnCRnAN UCLL BERVZCCS OrlllIng Itathed CABLE TOOL ffig Type Pirat eeeurrance eP B U • opp 4' Btotie U.L • 4217 SS' Oetae Haoauradi IS t 23 DEC 91 ARTC8ZAN Swing Depth (Pt)i US* Ual 1 Depth IPt) • IIS Bwing Diameter (ln)i 8 1/4* 10- 20— 10- lOv 70- M- LZTHOLDBZC DCSCRZPTZON ANO OBSCRVATZONS iANQT SILT< Pina groined Orgonie mettar In ueeer oertlen Pleimt Reeete «ifh HCl Breun (ID TR 5/31 BILTT CLATi Saturated Brey 110 TR S/ll Oecoaionel aond leneee SANOT SILTi Pino to very Pine groined (LOB CQNT OH POLLQUZHS PA6C1 UCLL COnPLCTZON OCTAZLS .Cement .Sentonite Breut .2* PVC Coeing, Schedule 40 _ — 2D-40 neeh 6i I lee Send (UCLL CQNT BN POLLOUlNa PASCI CHEVRON USA i i 1 I Ut-L B3 '93 12 20PM SLR OFFICE SERVICES EARTHFAX CNGIKCERING. INC. HYDROGEOLOGIC LOG PAOC 2 OP Prejeet Nonei CHCVRON BROUNO UATCR ROOCL Ounar/Cllenti CHCVRON USA SALT LAKC CZTT. UTAH Sorlngniall Numberi D-34 Bwlng/Uel 1 Leeetlen> B064 97 N 7999 42 C Prejeet Nuaberi UC-178-1S-01 Re/'erenee Clavdtionf 4213 «' RePeranee Pelnti TOP OP PVC CASING Data Orlliadi lS-20 OCC 1991 Legged byi JRP Ori 11 ing Centreeteri IinnCRnAN UCLL SCRVICCS Dri 11 Ing Hethedi CABLC TOOL Rig 7ypei Pirst eeeurrenee eP 8 U • opp 4 Static U L i 4217 SS' Oetae neeauredi 16 « 83 OCC 1191 AR7CSZAN Swing Depth irt) 1 US' MeII Depth (Pt) i US' Bering DIemeter lin)> 8 1/4* 100- 110- \ LZTHOLOBZC DCSCUPTXON AND OBSCRVATZONS SANOY SILT Pina to very Pme groined SANO> Vary oovr-aa te very Pine grainod Peerly aerted. Carbonate ond muSeevite Raoato kith HCI Sotureted , nethene bubblee Plowing eend Bleek end ahlta ealwad greina SILTT CLAT Boturotad Sroy" 110— 140— ISO— ISO- ITO— ISO— 190— CHEVRON USA KLL COnPLCTION OCTAILB (UCLL CONT FROn PRCVIOUS PABC I .20-40 neeh 8iIieo Bend .2* Sehedule 40 PVC 0 OlO' Slot Sereen .Threaded Cnd Plug I DEC 03 '93 12 20PM SLR OFFICE SERVICES P 22/23 EARTHFAX ENQINEERIN6, ZNC HYDROGEOLOGIC U3S PABC 1 OP Prejeet Neaei CHCVRON OROUNO UATCR HOOCL 0>^er/Cllenti CHCVRON U S A SALT LAKC CZTT. UTAH Bwlng/Uell Numberi D-34-00 Swing/Uell Loootleni BOSS 31 N 7996 02 C Project Number1 UC-179-1S-01 RePeranoa Clavatiam 4S13 43 ReParanoB Pemt 70P OF PVC CASINO Oete Ori 1 lad< SS DCC 91 - 3 JAN 92 Lagged by< JRP Drilling Controeteri ZZnnCRHAN UCLL BCRVZCCB OrlllIng Hethed CABLC 700L Rig 7ypei Pirat eeeurrenee eP 6 U i 4' Static H L • FL0UZN8 Oeteo naOBurad 28 OCC 1991 Bwfng Depth IPt)i US B' Uoll Depth (Pt) • US' Swing Diameter lln)i B 1/4* 10- 20- 100- LITHOLOfiZe DCSCRZPTZON ANO OBSCRVATZONS SANOY SILT I Vary Pine gra•ncd Hieaeeeue gray I eh brS>n (2 5 T 3/2) Vwy derk SILTY CLAY Setid>eted 011 ve grey (5 Y 5/2) Loeelly eondy Bray (5 T S/D ot 29 Peet Sandy Sendy Very dwk gray 17 5 TR VI) Vary eeorea to very Pine ewted Reocte te HCI (LOB CQNT ) ealered grelne r'olned leek an Peer Iy t4tlto UCU COnPUTION OCTAZLS .Coaant .Bontenlta Breut .2* PVC Cooing, Schedule 40 .20-40 nooh Bllleo Send (UCLL CONT ON FOLLOUINB PABC I CHEVRON USA DEC 03 '93 12 21PM SLR OFFICE SERVICES P 23/23 EARTHFAX ENGINEERING. ZNC HYDROGEOLOGIC LOG PABC 2 OP 2 Prejeet Neae< CHCVRON BROUNO UATCR HOOCL Owner/CI lent! CHCVRON U S A SALT LAKC CITT, UTAH Bwing/Uell Mjmban 0-34'«0 Bwlng/Uell Leeetiem BOBS 31 N 7996 02 C Prejeet Number• UC-175-18-01 RiPerenee Clevatiam 4213 41' RaParanee Pelnti 7aP OP PVC CABINS Dote Ori1ledi 28 DCC 91 - 3 JAN 92 Logged by' JRP DrM 1 Ing Hothadi CABLC 700L Rig 7ypai Firet eeeurrenee eP 8 U i 4' Btotio U L i PLOUINS Oetae neeeuredi 28 OCC 1991 Bwing Depth (Ptii US S' Uell Depth IPt) • US' Swine Diemater (ln)i 8 1/4' E i 100- 110- — I LZTHOLOBZC DCSCRZPTZON ANO OBSCRVATZONS SAND I ^^^^ory eooraa te vary Pina gretned ^FoorTy^ aerted Reeete to HCI Bleek and ahito colored greine BZLTT CLAY I Sotureted Brey 110— 190- «0— ito— IBO- too CHEVRON U S JL UCLL COnPLCTION OCTAZLS (UELL CONT PROn PRCVZOUS PACE) . 20*40 neeh Bilieo Bend .2* Behadula 40 PvC 0 010* 8let Beraan i~ Threaded Cnd Plug REFINERY AREA WELL COMPLETION SUMMARY I TABLE A-1 ICLL COHPLETION SIMHMY BOfiEHOLE WELL SCREENEII SLOT UELL DATE DErm DIAMETER DEPTH DIAMETER FROM TO SIZE uses NUMBER COHPLETED <rt) (in) (ft) (in) (ft) (ft) (in) SOIL TYPE Soil Description* S-l 5-11-81 15.0 7.0 15.0 2.0 1.0 15.0 .010 ML-SH SILT AND SAND S-2 5-11-81 15.0 7.0 15.0 2.0 7.0 15.0 .010 a-SH aAY AND FINE SAND S-2U 3- 1-84 11.0 5.0 11.0 2.0 4.0 1LO,<016 \ 8H SILTY FINE SAND S-2L 3- 1-84 15.5 5.0 15.3 2.0 13.8 15.3^ ^ SP FINE TO HEDIUH SMID S-3 ^ 7-81 15.0 7.0 15.0 2.0 1.0 15.0 .010 SM-SP FINE TO HEDIUH SAND S-4 8-12-81 20.0 8.3 17.0 2.0 2.0 17.0 .010 ML-SP SILT AND SANO S-5 5- 6-81 15.5 7.0 15.0 2.0 2.0 15.0 .010 SH-SP SILTY FINE SAND S-6 8-12-81 17.0 8.3 17.0 2.0 2.0 17.0 .010 N. CLAYEY SILT S-7 8-12-81 15.0 8.3 15.0 2.0 1.0 15.0 .010 ML-SN SILT AND FINE SAND S-8 8-13-81 19.5 8.3 19.5 2.0 4.5 19.5 .010 H-SP SILT MiD SAND S-9 B-13-81 17.0 7.0 17.0 2.0 2.0 17.0 .010 ML-SM SILT ANO FliC SAND S-10 11- 2-81 25.0 8.3 17.5 2.0 3.5 17.5 .010 a SILH CLAY S-11 11- 4-81 19.5 8.3 18.5 2.0 2.5 18.5 .010 N.-6M SILT MID mKL S-12 3- 1-84 19.0 5.0 18.9 2.0 3.8 18.8 .016 NL-6M SILT, SAND ANO GRAVEL S-13 3-2-84 14.0 5.0 11.9 2.0 1.9 11.9 .016 ML-6M SILT, SAND AND 6RA^ S-14 3- 5-84 12.0 5.0 12.0 2.0 2.0 12.0 .016 a-SM aAY, SILT AND FINE SAND S-15 ^ 6-84 12.5 5.0 12.3 2.0 1.8 12.3 .016 HL-SM SILT MID FINE SAND S-16 3- 6-84 12.0 5.0 11.5 2.0 1.5 11.5 .016 ML SILT S-17 3- 7-84 12.0 5.0 10.9 2.0 1.4 10.9 .016 HL-GM SILT TO GRAVa S-18 3- 5-84 19.0 5.0 16.8 2.0 4.3 16.8 .016 SM-6M SILH SAND AND GRAVEL S-19 3- 8-84 11.5 5.0 11.2 2.0 1.2 11.2 .016 KL-SM SILT AND SILH GRMa S-20 3- 6-84 13.0 5.0 13.0 2.0 2.2 13.0 .016 NL-SH SILT AND FINE SMID S-21 2-29-84 13.0 5.0 12.0 2.0 1.5 12.0 .016 HL-SH SILT AND FINE SAND S-22 2-27-84 12.5 5.0 11.7 2.0 1.7 11.7 .016 NL-SM SILT AND FINE SMID S-23 2-28-84 12.5 5.0 12.0 2.0 2.0 12.0 .016 ML-SM SILTY FINE SMID S-24 2-28-84 12.5 5.0 11.3 2.0 1.3 11.3 .016 ML-SM SILTY FINE SMID S-25 2-29-84 13.0 5.0 12.5 2.0 2.5 12.5 .016 HL-SH SILT MID FIIE SMID S-26 2-22-84 15.0 5.0 15.0 2.0 2.5 15.0 .016 HL-SH SILT AND FINE SMID S-27 2-22-84 12.5 5.0 12.0 2.0 2.0 12.0 .916 HL-SH SILT MID FINE SMID S-28 2-20-84 22.0 5.0 20.6 2.0 2.6 20.6 .016 HL-SP SILT AND FINE SAND S-28U 2-20-84 8.0 5.0 7.5 2.0 2.5 7.5 .016 HL CLAYEY SILT S-28L 2-20-84 20.0 5.0 19.0 2.0 17.0 19.0 .016 SH-SP FINE SMID S-29 2-16-84 13.0 5.0 11.5 2.0 1.5 11.5 .016 a-ML SILTY CLAY S-30 2-21-84 15.0 5.0 13.8 2.0 2.8 13.8 .016 a-sp aAY MID FINE SAND S-31 ^21-84 13.0 5.0 12.5 2.0 1.5 12.5 .016 a-sc CLAYEY SILT MID SAND S-32 2-23-84 12.5 5.0 12.0 2.0 2.0 12.0 .016 a SILH CLAY S-33 M5-84 13.0 5.0 12.3 2.0 2.3 12.3 •016 NL-a CLAYEY SILT S-34 2-23-84 12.5 5.0 12.3 2.0 2.3 12.3 .016 HL-SH SILT AND FINE SMID S-35 3- 9-84 18.0 5.0 16.0 2.0 4.0 16.0 .016 ML-6H SILTY FINE SMID MO GMV S-36 2-16-84 13.0 5.0 13.0 2.0 3.0 13.0 .016 a CLAY D-l 6- 8-81 90.0 10.0 90.0 5.0 60.0 90.0 .010 NL-SH SILT MID FI)E SAND D-2 6-17-81 90.0 10.0 80.0 5.0 30.0 80.0 .010 HL-SH SILT AND FINE SMID D-3 5-14-81 90.0 10.0 90.0 5.0 60.0 90.0 .010 NL-SH SILT MID FINE SMID D-4 8-11-81 81.5 8.3 M.O 2.0 43.0 70.0 .010 8P-flP SAND AND GRAVEL D-5 5-26-81 86.5 10.0 85i0 5.0 35.0 85.0 .010 SP-6P SMID MID GRAVEL D-10 11- 4-81 97.0 6.0 97.0 2.0 71.5 97,0 .010 a-8p aAY AND FINE SMID D-11 11- 5-81 114.5 6.0 113.0 2.0 98.0 113.0 .010 a-NL CLAY MID SILT ^28 11-19-84 102.0 8.0 102.0 .8 100.0 102.0 .010 a-NL CLAY AND SILT D-33 11-27-84 101.5 8.0 101.0 .8 99.0 101.0 .010 HL-CL CLAY MID SILT D-35 3-16-84 75.0 5.0 75.0 2.0 47.0 75.0 .016 a-sp CLAY MID SAND D-36 11-20-84 101.5 8.0 101.5 .8 99.5 101.5 .010 a-HL CLAY AND SILT * Soil types most characteristic of borehole REFINERY AREA AQUIFER TEST DATA i f I f I f I t I f I TABLE 3-6 SUMMARY OF AQUIFER TEST RESULTS Saturated uses EsCima Well Type of Transmissivity Thickness Soil Permeab ility Number Aquifer Test (Kpd/ft) (ft) Type (cm/sec) s-l SLUG 15 2 SM 3.6 X 10-^ S-2 SLUG 56 4 SM-SP 6.7 X ] LO-^ S-3 SLUG 13 6 SP 1.0 X LO-^ S-5 SLUG 11 11 SM-SP 4.8 X 10-5 S-10 SLUG 400 10 CL 1.9 X 10-3 S-11 SLUG 1100 9 ML 5.8 X 10-3 S-12 Q/s 4300 3 GM(fill) 6.8 X 10-2 S-13 Q/s 230 3 SM 3.6 X 10-3 S-14 SLUG 41 4 SM-ML 4.8 X 10-4 S-15 Q/s 270 4 SM 3.2 X 10-3 S-16 Q/s 500 10 ML 2.4 X 10-3 S-17 SLUG 1197 3 GM-SM 1.9 X 10-2 S-18 Q/s 90 1 GM-SM 4.3 X 10-3 S-19 Q/s 31 5 SM 2.9 X 10-4 S-20 Q/s 550 2 GM-SM 1.3 X 10-2 S-21 SLUG 380 5 SM 3 6 X 10-3 S-22 SLUG 370 7 SM 2.5 X 10-3 S-23 SLUG 250 6 SM 2.0 X 10-3 S-24 Q/s 170 5 SM 1.6 X 10-3 S-25 SLUG 420 7 hL-SM 2.8 X 10-3 S-26 SLUG 1300 4 SM 1.5 X 10-2 S-27 Q/s 100 7 ML-SM 6 7 X 10-4 S-29 SLUG 850 2 ML 2.0 X 10-2 S-30 SLUG 250 4 SM-SP 2.9 X ] 10-3 S-31 Q/B 80 3 SC 1.2 X 10-3 S-33 SLUG 250 4 ML 2.9 X ] LO-3 S-34 Q/s 13 4 SM 1.5 X 10-4 S-35 Q/B 1400 12 SM-GM 5.5 X ] 10-3 D-2 Pump Test 80 37 SP-SM 1.0 X ] LO-4 D-3 Pump Test 200 6 SP-GP 1.6 X ] 10-3 D-5 Pump Test 5000 47 SP-GP 5.0 X ] LO-3 ed Q/s ° Specific Capacity * Characterises thickness of coarse-grained unit contained within screened interval. ** Characterizes soil type of saturated coarse-grained unit withm screened interval. i i I 'I i i TABLE 6 TRANSMISSIVITY AMD HYDRAULIC CONDUCTIVITY ESTIMATES FROM SPECIFIC CAPACITIES Well Specific Capacity (EPm/ft) Estimated Transmissivity (gpd/ft) Saturated Thickness (ft) Hydraulic Conductivity (ft/day) (cm/sec) MW-108 0.44 220 5.4 5.4 1.9 X 10"^ MW-llO 0.46 230 6.6 4.7 1.6 X 10"^ MW-111 0.45 230 5.9 5.2 1.8 X 10~^ MW-112 1.1 550 5.8 13 4.5 X 10"^ k k 'k k TABLE 3 SUMMARY OF SLUG TEST ANALYSES Note: Method 1 Is Hvorslev Method 2 Is Cooper, Bredehoeft, and Fapadopulos Method 3 Is Ferris and Knowles Method 4 is Bouwer Well Hydraulic Conductivity Method 1 Hydraulic Conductivity Method 2 Storage Coefficient Method 2 Hydraulic Conductivity Method 3 Hydraulic Conductivity Method 4 MW-101 6.15E-03 1.45E-02 2.50E-06 -3.49E-03 MW-103 l.llE-04 1.41E-04 2.50E-04 1.93E-04 7.60E-05 MW-108 3.74E-03 7.92E-03 2.50E-04 1.79E-03 1.55E-03 MW-110 9.62E-03 2.42E-02 2.50E-06 -5.71E-03 MW-111 l.lOE-02 2.64E-02 2.50E-06 -7.70E-03 M'/-112 1.12E-02 2.80E-02 2.50E-06 -4.07E-03 S-22 9.63E-04 1.87E-03 1.60E-06 — 6.33E-04 NORTH TANK FARM BORE LOGS AND MONITORING WELL CONSTRUCTION DATA AUGUST 1991, WELLS EF-2D TO EF-9 I GEOLOGIC LOG COMPLETION DETAILS 10 EL£VAT10N AT TOP OF U CASINS 42197 DESCRIPTION LoctaNO WEU.' CAP V -4 •= 2/5/91 0-3' QRANULAR FILL CONCRETE SURFACE PROTECTION PAD 7 3Ja-4Jiy SILTY CLAY DARK GRAY 6Y 4A DAMP MEDIUM TO HIGH PIASTICITY WET AT 4' 4ja-eJX SILTY CLAY DARK GRAY 5Y 4A WET SOME ROUNDED GRAVEL. SOFT TO HRM. PJ»EN «10-16 TSF r sw STAINLESS STEEL CASINO - 7 S/4 DRILLHOLE eJO-tS SILTY CLAY UGHT GRAY 6Y 7/1 6^&7 SILTY SANO GRAY 5Y 6A UNIFORM. VERY FINE GRAINED SANO 67-&S CLAYEY GRAVEL UGHT GRAY, 6Y 7/t GRAVEL IS IRREGULAR UP TO r MODERATE PLASTIC FINES. 8.6 laO" SILTY SAND/SILTY CLAY UGHT GRAY 5Y 7A MICACEOUS, SAND VERY FINE GRAINED VARVINQ, OCCASIONAL FINE GRAVEU RNES ARE MEDIUM TO HIGH PUkSTICITY 12 16 lao-nz SILTY CLAY OUVE GRAY BY S/Z STICKY MEDIUM TO HIGH PLASTICITY n2-14Xr SAND, FINE GRAINED DARK GREENISH GRAY 6GY 4A UNIFORM, MICACEOUS MiO-l&ff SAND AND SILTY CLhY THINLY BEDDED HINT OF VARVINa 'hp: , STEEL SURFACE CASING 7*fT m 'tf> BENTONITE CEMENT GROUT BENTONITE SEAL EarthFax Engineering, Ina CHEVRON, USA SALT LAKE REFINERY MONITORING WELL EF-2D Pag* 1 of 3 GEOLOGIC LOG COMPLETION DETAILS DESCRIPTION IS 20 22 . 24 32 1&0-18Xr CLAYEY SILT DARK GRAY SY 4A VERY SOFT PJ>EN > OS TSF, STICKY, MEDIUM TO HIGH PLACTICITY 1&0-20.4 SILTY SANO DARK GRAY 5Y 4A UNIFORM, MICACEOUS, SAND VERY RNE GRAINED CLAY IS DARK BROWN, WYR 3/3. r 316 STAINLESS STEEL CASINO 204-22.7 SILTY CLAY DARK GRAY 6Y 4/L STICKY, MEDIUM TO HIGH PLASTICITY VERY SOFT PPEN < 0L6 TSF 22.0-240- SAND VERY FINE GRAINED DARK GRAY TO OUVE GRAY SY 4/V4/2; UNIFORM, MICACEOUS, THIN LAYERS OF CLAY BROWN. 7S YR 4/2. 24j0-2aff SILTY CUkY GRAY TO BLACK 10 YR 6/3 TO SY 4n BROWN TO BLACK OXIDATION STAINING THROUGHOUT VERY SOFT PJPBH < OS TSF> 2610-3417 SILTY CLAY DARK GRAY TO BLACK, SY 4/1 TO BLACK, THIN LAYERS OF FINE SANO AT 2915* SOT, Sas* AND 33S'-34Xr EarthFax Engineenng, Inc. CHEVRON. USA SALT LAKE REFINERY to -V <•'( ST'5- < M«|;« BENTONITE 'SEAL 18-30 MESH SIUCA SAND MONITORING WELL EF-2D Page 2 «i 3 GEOLOGIC LOG COMPLETION DETAILS p Ul 32 DESCRIPTION 34. SILTY CLAY (AS ABOVE) 34.0-35.2' SAND RNE GRAINED GRAY 6Y 4A UNIFORM. MICACEOUS OCCASIONAL FRACTURED GRAVELS 36 35.2-36.ff SILTY CLAY SOFT AND STICKY MEDIUM TO HIGH PLASTICITY WITH THIN LAYERS OF SANO r 3ie STAINLESS STEEL SCREEN (OUOIir SLOT) 360-400 SAND FINE GRAINED GRAY 5Y 4/L UNIFORM MICACEOUS OCCASIONAL THIN GRAVEL AND CLAY LENSES 38. 40 42 400-44iy SILTY CLAY DARK GRAY 5Y 4A SOFT AND STICKY MEDIUM TO HIGH PLASTICITY TRACE MICA ANO FINE GRAVEL ROUNDED TO V8 46 48 44X>-48.ff SAND FINE GRAINED DARK GREENISH GRAY SGY 4/\ UNIFORM MICACEOUS. STAINLESS STEEL END CAP ARTESIAN FLOW TD 48 EarthFax Engineering, Inc. CHEVRON. USA SALT LAKE REFINERY MONITORING WELL EF-2D i i GEOLOGIC LOG Ul a. o 0 . o z DESCRIPTION 0-3 ff GRANULAR FILL 3ja-BSX CLAY GRAY 5Y 6A SOFT TRACE COARSE SAND AND VERY RNE GRAVEL MEDIUM TO HIGH PLASTICITY 60-7ff SILTY CLAY GRAY TO DARK GRAY, 6Y 6/1 TO 4/1 STIFF MEDIUM TO HIGH PLASTICITY OCCASIONAL ANGULAR GRAVEL PPEN « 16-2.0 TSF 7i>-7S' SILTY CLAY GRAY 5Y 6/1 STIFF MEDIUM TO HIGH PLASTICmr MICACEOUS PJ»EN « U 2.0 TSF 78-92' SILTY SAND FINE GRAINED IOYR 5/4 MICACEOUS YELLOWISH BROWN 9.2-nff SILTY CLAY DARK GRAY SY 4A STIFF MEDIUM TO HIGH PLASTICITY nO-130 SILTY CLAY ORAY IOYR 6/t MEDIUM TO HIGH PLASTICITY MEDIUM GRAINED SAND LENSE AT 12.5, VERY MICACEOUS, SOFT TO RRM, PJ>EN > 0S-a76 TSF ^3Ja-XTS SILTYCLAY GRAY, IOYR SA SOFT AND STICKY, THIN RNE GRAINED SAND LENSE AT Uf AND ISyS- RNE TO MEDIUM GRAINED MICACEOUS SAND LENSE AT 16Xr GRAYISH BROWN, IOYR 6/2, VERY STIFF PPEN a 2X>-2S TSF EarthFax Engineering, Ina COMPLETION DETAILS ELEVATION AT TOP OF S& CASINft 42201 LOCKINO WELL' CAP V -01 - 2/5/SI 7 CONCRETE SURFACE PROTECTION PAD r sw STAINLESS STEEL CASINO 7 3/4 DRILLHOLE . r 3ie STAINLESS STEEL SCREEN (Otoior SLOT) V. CHEVRON. USA SALT LAKE REFINERY • ft . STEEL SURFACE CASINO BENTONITE CEMENT OROUT 16 30 MESH ^ SIUCA SANO MONITORING WELL EF-4 Page 1 of 2 GEOLOGIC LOG COMPLETION DETAILS z a. u o 16 . DESCRIPTION SILTY CLAY (AS ABOVE) 176-177 SAND RNE GRAINED MICACEOUS STAINLESS STEEL END CAP. 20 22 . «- 0' t>0 Ji' ^ 177-19D SANDY GRAVEL ROUNDED UP TO T igx>-21j0' SANDY GRAVEL OLIVE GRAY 5Y 4/2, MICACEOUa GRAVEL IS IN VERY FINE GRAINED SAND MATRIX. 310-23 ff SAND RNE GRAINED OUVE GRAY 5Y S/Z UNIFORM. MICACEOUS SOME FINE GRAVEL WELL ROUNDED ARTESIAN FLOW HOLE COLLAPSE . 16-30 MESH SIUCA SANO TD 23 24 2« 28 30 32 EarthFax Englneenna Inc. CHEVRON, USA SALT LAKE REFINERY MONITORING WELL EF-4 Page 2 of 2 I GEOLOGIC LOG E Ul b 0. lU o 10 12 16 I I DESCRIPTION O-ZO SILTY CLAY VERY DARK GRAY IOYR 3/L ORGANIC MATERIAL 2ja-40 SILTY CLAY UGHT GRAY IOYR 7/2, WCT SOFT AND STICKY MEDIUM TO HIGH PLASTICITY SOME FINE SAND AND OCCASIONAL GRAVEL 40-7ff SILTY SAND UNIFORM. GRAY TO UGHT OUVE GRAY 2.SY 5/0 TO 5Y 6/Z VERY FINE GRAINED 70-8ff CLAY PALE BROWN IOYR 6/3 MEDIUM TO HIGH PLASTICITY TRACE SILT AND VERY RNE GRAINED SAND aO-IOff SILTY CLAY OLIVE GRAY 5Y 4/2, TRACE OF SAND SOFT TO FIRM, PPEN = a26--a75 TSF 100-llff SAND FINE GRAINED SOME MEDIUM TO COARSE GRAINED nO-2Zff SAND OUVE GRAY 6Y 6/2. INCREASING COARSE GRAINED SANO AND FINE GRAINED GRAVEL WELL ROUNDED TO 2 AT 15 EarthFax Engineering, Inc. COMPLETION DETAILS ELEVATION AT TOP OF && CASING 42254 LOCKING WEU' CAP 7 CONCRETE SURFACE PROTECTION PAD r 3M STAINLESS STEEL CASINO / 7 3/4 DRILLHOLE. 2* 316 STAINLESS STEEL SCREEN (aAlO- SLOT) CHEVRON, USA SALT LAKE REFINERY rr=n ^ STEEL SURFACE CASING , BENTONrrE CEMENT GROUT V SWL • 2.1 - 2/5/91 16 30 MESH _ SIUCA SAND MONITORING WELL EF-5 0, 2 GEOLOGIC LOG COMPLETION DETAILS Ul Ul £ a. m a 16 . S2 DESCRIPTION SAND (AS ABOVE) STAINLESS STEEL END CAP 18 20 22 24 22.0-24 or CLAY VERY DARK GRAY, 2iYR 3A VERY SOFT AND STICKY MEDIUM TO HIGH PLASTICrTY. PPEN < 025 TSF 16-30 MESH SIUCA SAND . HOLE PLUO TD24 26 28 30 32 EarthFax Engineenng, inc. CHEVRON. USA SALT LAKE REFINERY MONITORING WELL EF-5 Page 2 ol 2 GEOLOGIC LOG COMPLETION DETAILS E u b 8 (2 ELEVATION AT TOP OF SS. CASING 4220.2 DESCRIPTION LOCKINQ WELL' CAP 0-3jff GRANULAR FILL 7 CONCRETE SURFACE PROTECTION PAD 2* 316 STAINLESS STEEL CASINO 3.0-5.ff SILTY CLAY VERY DARK GRAY, IOYR 3/1 TO UGHT BROWNISH GRAY WYR 6/Z DAMP SOFT AND STICKY MEDIUM TO HIGH PLASTICITY 7 3/4 DRILLHOLE . 10 iJ0-7Xr SILTY CLAY GRAY 6Y 6A DAMP SOFT AND STICKY MEDIUM TO HIGH PLASTICITY 7j0-9ir SILTY SAND VERY RNE GRAINED GRAY TO OUVE GRAY, 5Y 5/1 TO SY 6/Z UNIFORM. MICACEOUS, SILT GRADES LESS WfTH DEPTH. 2* 316 STAINLESS STEEL SCREEN (OOVr SLOT) .V 9A-10S SILTY CLAY OUVE GRAY 6Y 6/2 TO LIGHT YELLOWISH BROWN Z6Y 6/4 FIRM. MEDIUM TO HIGH PLASTICITY PPEN • OS-tO TSF iaS-1Ur SILTY SAND VERY RNE GRAINED DARK GRAY SY 4A UNIFORM. MICACEOUS.. 12 14 16 ItO-IZff SILTY CLAY YELLOWISH BROWN. IOYR 6/4 VERY SOFT MEDIUM TO HIGH PLASTICITY. OCCASIONAL GRAVEL TO 1' ROUNDED PPEN < 056 TSF 1Z0-13.2' SILTY SAND OUVE GRAY 5Y 4/Z VERY RNE GRAINED, UNIFORM, MICACEOU& 13,2-16ir SILTY CLAY DARK GRAY SY 4A VERY SOFT AND STICKY MEDIUM TO HKSH PLASTICITY PPEN < 025 TSF CO] 'V I* 1 f ' / 'l ^ STEEL SURFACE CASINO BENTONITE CEMENT OROUT — SWL • ZD 2/5/SI 16-30 MESH ^ SIUCA SANO EarthFax Engineering, ina CHEVRON. USA SALT LAKE REFINERY MONITORING WELL EF-6 Page 1 of 2 I GEOLOGIC LOG z O. a 16 . 18 a o £ a 20 S' DESCRIPTION Mjo-rrxr SILTY SAND DARK GRAY SY 4 T. VERY FINE GRAINED UNIFORM. MICACEOUS 170-1017 SILTY CUY/SILTY SANO DARK GRAY, 6Y 4A THINLY BEDDED LENSES. 190 2Z0 SILTYCLAY VERY DARK GRAY 5Y 3/1 VERY SOFT AND STICKY MEDIUM TO HIGH PLASTICITY PPEN < 0.25 TSF 22 24 ssss 26 2S 30 32 SS SS SS SS s sss 2Z0-230' SILTY SAND BROWN IOYR 6/3, VERY FINE GRAINED 230-26.0' SILTY CLAY VERY DARK GRAY 5Y 3A VERY SOFT AND STICKY MEDIUM TO HIGH PLASTICrTY OCCASIONAL THIN LAYERS OF SILTY SAND BROWN. IOYR 6/3 VERY FINE GRAINED COMPLETION DETAILS STAINLESS STEEL END CAP EarthFax Engineering. Inc CHEVRON. USA SALT LAKE REFINERY HOLE PLUO TD25 MONITORING WELL EF-6 Page 2 of 2 GEOLOGIC LOG COMPLETION DETAILS E Ul z DESCRIPTION O-Zff GRANULAR FILL 2X>-4Xr SILT AND CLAY GRAYISH BROWK IOYR 6/Z DAMP MEDIUM TO HIGH PLASTICrTY 40-«.ff SILTY CLAY UGHT OUVE GRAY 5Y e/Z WET OCCASIONAL IRREGULAR GRAVEL TO T 6.0-65 CLAYEY GRAVEL UGHT OUVE GRAY 5Y 6/Z 6.5-aff SILTY CLAY PALE OUVE. 5Y 6/3 SOFT AND STICKY, OCCASIONAL VERY FINE SAND MEDIUM TO HIGH RUSTICITY BSi-aS SANDY CLAY YEUOWISH BROWK IOYR 6/4 MICACEOUS SAND IS VERY FINE GRAINED 10 9S-m£t CLAYEY GRAVEL UGHT OUVE GRAY SY 6/Z lip SS 100-13.5 SILTY CLAY UGHT YELLOWISH BROWN, WYR e/4, SOFT AND STICKY MEDIUM TO HIGH PLASTICITY THIN RNE GRAINED SAND LAYER AT tlS, PPEN < 0.26-05 TSF 1X6-14ir SAND RNE GRAINEa GRAY, SY SA UNrORM MICACEOUa. 14 16 M0-15i7 SILTY SAND FINE GRAINED MICACEOUS 15X1-165 SAND FINE GRAINED DARK GREENISH GRAY SGY 4A MICACEOUS ELEVATION AT TOP OF SJ CASING 42191 LOCKING WELL'* CAP CONCRETE7 SURFACE PROTECTION PAD r SW STAINLESS STEEL CASINO 7 3/4 DRILLNOLE . r 316 STAINLESS STEEL SCREEN mow SLOT) ID .STEEL SURFACE CASING BENTONnE CEMENT OROUT V SWL • 3.1 r" 2/5/91 16 30 MESH _ SILICA SANO EarthFax Engineenng, Ina CHEVRON. USA SALT LAKE REFINERY MONITORING WELL EF-7 Page 1 of 2 GEOLOGIC LOG COMPLETION DETAILS DESCRIPTION SAND (AS ABOVE) 20 . 22 . 24. 26 . 16J5-216' SILTY CLAY VERY DARK GRAY Z5Y 3A VERY SOFT AND STICKY MEDIUM TO HIGH PLASTICTTY PPEN < 025 TSF STAINLESS STEEL END CAP 2t5-2Z0' SILTY SANO DARK GRAYISH BROWN, IOYR 4/Z VERY RNE GRAINED UNIFORM, MICACEOUS t V 2Z0-24ff SILTY CLAY AND SILTY SAND VERY DARK GRAY Z5Y 3A AND DARK GRAYISH BROWN, IOYR 4/2, THIN LENSES 1 -6 THICK. 240 26^ SILTY CLAY VERY DARK GRAY Z5Y 3A VERY SOFT AND STICKY MEDIUM TO HIGH PLASTICITY OCCASIONAL THIN LENSE OF SILTY SAND ... ^ . HOLE PLUO TD.26' 28. 30. 32 . EarthFax Engineering, Inc CHEVRON. USA SALT LAKE REFINERY MONITORING WELL EF-7 Page 2 of 2 ! I GEOLOGIC LOG 10 • 12 14 16 DESCRIPTION O-Zff SILT AND CLAY VERY DARK GRAY SYR 3/\ DAMP MEDIUM TO HIGH PLASTICITY ORGANIC. OCCASIONAL SAND AND GRAVEL Z0-4.0r SANDY GRAVEL GRAY 5Y 5/1 WET AT 3' 4 0-6.0' CLAYEY GRAVEL GREENISH GRAY TO BLACK. SG 5/1 TO ZSY 2/0 SOME FINE GRAINED SAND GRAVEL IS SUB-ROUNDED TO ANGULAR 60-eff GRAVEL BLACK. Z5Y 2/0 ROUND TO SUB-ROUND TRACE FINE GRAINED SAND AND CLAY eX>-100- SANDY GRAVEL UGHT OUVE GRAY 6Y 6/2, SOME CLAY GRAVEL SUB-ROUNDED TO ROUNDED TO 15 100 IZff SILTY CLAY YELLOWISH BROWN TO OLIVE GRAY IOYR 5/4 TO 6Y 6/Z STIFF TO VERY STIFF MEDIUM TO HIGH PLASTICITY PPEN « 125-15 TSF 1Z0-13f CLAY MEDIUM TO HIGH PLASTICITY FIRM. PPEN • 075-10 TSF 135-14 ff SILTY SAND DARK GRAY 5Y 4A UNIFORM. FINE GRAINED, TRACE CLAY ua-WJCf SAND DARK GREENISH GRAY SGY 4/1 FINE GRAINED UNIFORM, MICACEOUS OCCASIONAL THIN CLAY LENSES EarthFax Engineenng Ina COMPLETION DETAILS ELEVATION AT TOP OF PVC CASING 42284 LOCKING WELL' CHEVRON, USA SALT LAKE REFINERY i i GEOLOGIC LOG p u 16 — sssss 20 Zsssss 22 24 26 28 30 32 s'>t>NN JsNsS vvsss \ s s s s sssssj SSSSS'' sssss sssss DESCRIPTION SAND (AS ABOVE) 18.0-2Z0' SILTY CLAY VERY DARK GRAY SY 3A SOFT, MEORJM TO HIGH PLASTICrTY THIN RNE GRAINED SAND LENSE AT 20JO-210' OCCASIONAL WOODY OR<SANI8M& PPEN < 025 TSF COMPLETION DETAILS PVC END CAP HOLE PLUO TD22 EarthFax Englneenna Ina CHEVRON. USA SALT LAKE REFINERY MONITORING WELL EF-8 Page 2 of 2 I i GEOLOGIC LOG D. UJ o 0 . 10 12 16 o o DESCRIPTION O-Zff GRANULAR FILL Z0-5ff SILTY CLAY GRAY 5Y 5A MEDIUM TO HIGH PLASTICITY (J-— 2^ 6.0-6i7 CLAYEY SILT WfTH SANO GRAY 5Y 6A MEDIUM TO HIGH PLASTICTTY 60 63 SANDY GRAVEL GRAY 5Y 5/1 SOME SILT & CLAY 63 7ff CLAY BROWN IOYR 5/3. STIFF MEDIUM TO HIGH PLASTICTTY PPEN » 15 TSF 70-1Zff SILTY SAND DARK GREENISH GRAY SGY 4A UNIFORM, MICACEOUS RNE GRAINED 1ZD-13J SAND VERY FINE TO FINE GRAINED UNIFORM MICACEOUS DARK GREENISH GRAY SOY 4A 13.5-14 ff SANDY GRAVEL DARK GREENISH GRAY SGY 4A UNIFORM. MICACEOUS GRAVEL ROUNDED TO 3/4 SANO IS VERY RNE TO RNE GRAINED 140 ^aS> SANO VERY FINE TO RNE GRAINED UNIFORM. MICACEOUS DARK GREENISH GRAY SGY 4/1 EarthFax Engineenng, ina COMPLETION DETAILS ELEVATION AT TOP OF SS CASING 42177 LOCKING WELL- CAP 7 CONCRETE SURFACE PROTECTION PAD r 316 STAINLESS STEEL CASINO 7 3/4 DRILLHOLE . r 316 STAINLESS STEEL SCREEN (CLOIO'SLOT) ^ CHEVRON, USA SALT LAKE REFINERY CO ,STEEL SURFACE CASING S BENTONITE CEMENT GROUT ^ SWL « tS r 2/5/91 16 30 MESH _ SIUCA SAND MONITORING WELL EF-9 Page 1 of 2 I GEOLOGIC LOG 16 IS 20 22 . 24 26 28 30 32 s o DESCRIPTION SAND (AS ABOVEX 18*-20ff SILTY CLAY OUVE GRAY 5Y 4/2. VERY SOFT AND STICKY MEDIUM TO HIGH PLASTICITY PPEN <025 TSF COMPLETION DETAILS STAINLESS STEEL END CAP 16-30 MESH SIUCA SAND TD 20 EarthFax Engineenng, Ina CHEVRON, USA SALT LAKE REFINERY MONITORING WELL EF-9 Page 2 ef 2 NORTH TANK FARM BORE LOGS AND MONITORING WELL CONSTRUCTION DATA JUNE 1990, WELLS EF-1 TO EF-3 GEOLOGIC LOG COMPLETION DETAILS 1 — 3 — vs IP SURFACE ELEVATION 4221SS DESCRIPTION CONSTRUCTION FILL. BANK RUN GRAVELS AND SANDY QRAVEL IMPORTED AS ENGINEERED FILL SILTY CLAY LT GRAY TO U(*HT BROWNISH GRAY DAMP TO MOIST STIFF SOMEWHAT MOTTLED MODERATE PLASllCmr RNE TO MEORJM QRAVEL CLASTS. FINE TO MEDIUM SAND& SAND W/SILTY SAND- LT OUVE GRAY VERY MOIST TOSATURATEa DENSE. PINE TO COARSE SUB-ANGULAR TO SUB-ROUNDED CLASTS. CUYEY SILT W/SAND- DK. GRAYISH BROWN. VERY MOIST FIRM. LOW TO MODERATE PLASTICITY SOME MOTTUNa ^10 SLOT STAINLESS STESL SCREEN 20_ SAND: LT OUVE GRAY TO GRAY SATURATEa MEDIUM DENSE RNE TO MEDIUM SUB-ANGULAR TO SUB-ROUNDED SAND QRA1N& MtCACEOU& CLASTS OF WEATHERED ROCK, EtfthFax Enginaanna Inc CHEVRON USA INC SALT LAKE CITY REFINERY SALT LAKE CITY. UTAH MONITOR WELL EF-1 DRILL HOLE LOG MONITOR WELL EF-2 0.0' - 3.0' Construction Fill: Typically sandy gravels and gravelly sands. Bank run material imported as engineered fill. Thickness varies across the site. GM-SM to GP-SP 3.0' - 3.5': siltv CLAY; Grayish brown (2.5YR5/2), damp to moist, firm, mod. plasticity, occ. sands, friable at present %m. Strong product odor, trace organics (roots). CL 3.5' - 4.0': ...grades more silty and more moist... 4.0' - 4.5': ...desiccation & more silty, strong product odor... 4.5' - 5.0': elavev SILT/ailtv CLAY; Lt. brownish gray (2.5Y6/2) very moist, soft to firm, mod. plastic, occ. fine gravels, strong product odor. HL-SM 5.0' - 5.5': aandv SILT v/elav; Lt. olive gray (5Y6/2), low to moderate plasticity, micaceous, some mottling, strong product odor, very fine to fine grained, sub-angular sand grains. ML-(SM) 5.5' - 6.0': sandy SILT w/clav; Lt. gray (2.5Y7/2), very moist, firm, very fine to fine sub-angular sand, med. to low plasticity, silt matrix is mottled w/dark gray, mild product odor. ML-SM 6.0' - 6.5': sandy SILT v/elav; Lt. gray (5Y7/2), damp to moist, firm to stiff, very fine to fine sub-angular to sub-rounded sand grains, mod. plasticity, small nodules of well cemented silt & very fine sand, very strong reaction to 10% HCL, occ. svib-rounded gravels, mild product odor. ML-(SM) 6.5' - 7.0': silty SAND: Lt. brownish gray to pale olive (5Y6/2- 6/3), moist, medium dense, very fine to fine sub- rounded to sub-angular sands, thin clay stringers, micaceous, mottled in sections, mild reaction to 10% HCL, (matrix), mild product odor. SM 7.0' - 7.5': ailty SAND; Lt. brownish gray-olive (2.5Y6/2 to 5Y5/3), moist, dense, very fine stib-angular sands, thin clay stringers w/mod. plasticity, nodules of highly calcareous well cemented silts, very strong reaction to 10% HCL. SM CHEVRON USA Solt Lake Refinery 7.5' - 8.5': silty SAND/sandy SILT; Lt. olive to light brownish gray (5Y6/2-2.5Y6/2), moist, very fine to fine sands, very micaceous, some pale olive clayey silt stringers or lenses with mod. plasticity, very mild product odor, some silt nodules. SM-(ML) 8.5' - 9.0': clayey SILT; Brown (10YR5/3), damp to moist, firm to stiff, mod. plasticity, occ. thin micaceous lenses or partings, nodules as eUsove with very strong reaction to 10% HCL. ML-(SM) 9.0' - 9.5': clayey aandv SILT; Pale brown (10YR6/3) to olive \gray (5Y5/2), moist, firm to stiff, thin micaceous sandy lenses, silt nodules, strong reaction to 10% HCL, mod. plasticity. ML 9.5' - 10.0': ailty SAND v/aravel; Pale brown (10YR6/3), matrix, moist, med. dense, fine to coarse sands and fine gravels, coarse sands and gravels are sub-rounded qtz., qtzt and some Is, minor ss, faint product odor. SM ...gradational transition... 10.0' - 10.2': silty CLAY v/flna aand; Brown (10YR5/3), moist, stiff to firm, mod. plasticity, trace fine gravel.CL-ML 10.2' - 11.0': clayey aandv SILT v/aravel; Pale brown (10YR6/3), to olive gray (5Y5/2), very moist, firm (med. dense) sand is very fine sub-angular, contains sub- rounded to sub-angular, coarse sand and fine gravel >#4<3/8. CL-SM (GM) 11.0' - 11.5': silty SAND; Olive (5Y5/3) to grayish brown (2.5Y5/2), moist, med. dense, micaceous, very fine to fine sand, primarily siib-rounded, mod. reaction to 10% HCL. SM 11.5' - 12.0': silty SAND; Olive (5Y5/3) to gray (5Y6/1), mottled, very moist, med. dense, very fine to med. sub- angular sands, micaceous, mild product odor, thin stringers or partings of silt with mica. SM 12.0' - 13.5': aandv SILT/SAND; Olive gray (5Y4/2), very moist, med. dense, hint of varving, thin laminations w/highly micaceous v. fine sand & sandy silt beds, sand is sub-angular, silts are low to mod. plasticity, trace of product odor. SM-SP 13.5' - 14.5': clayey SILT v/sand; Olive arav (5Y4/2), moist, med. dense, mod. plasticity, sand is med. grain, sub- rounded, black, no product odor, moderate reaction to 10% HCL. ML CHEVRON U.SA Salt Lake Refinery 14.5' - 15.0': clayey SILT v/trace aand; Grayish brown (2.5Y5/2), moist, firm to stiff, mod. plasticity, some mica, very fine, sub-angular sand. ML 15.0' - 18.0' SAND; Lt. olive gray to gray (5Y6/2), very moist to saturated, fine to medium, sub-angular to siib- rounded grains, micaceous, clasts of weathered rock. SP CHEVRON U SA Salt Lake Refinery GEOLOGIC LOG COMPLETION DETAILS E lU o 1 S 9 —j 0 SURFACE ELSVATIOIt 42193S DESCRIPTION eoNCRSTe aunFAce FKOTECnON rAO . CONSTRUCTION RLL BANK RUN GRAVELS ANO SANDY GRAVEL IMPORTED AS ENGINEERED FILL rtTAMLSaS •TOLCASINa CLAYEY SILT/SILTY CLAY DARK GRAYISH BROVm TO PALE YELLOW VERY MOIST RRM TO STIFF MODERATE PLASTICITY SOME OROANICSL SOME DESICCATION, 5/90 9 _ SILTY SAND- GRAYISH BROWN. VERY MOIST. n II tt Zi « V SILTY CLAY/CUYEY SILTi LT.GRAY VERY MOIST TO SATURATEa RRM TO STIFF MODERATE PLASnCITY HIGHLY CALAREOU& SAND/SILTY SANOc OUVE GRAY TO GRAYISH BROWN, VERY MOIST TO SATURATEa MEDIUM DENSE THIN SILTY CLAY STRINGERS. RNETOVERY- RNE SANO, SUB-ROUNDEa HIGHLY MICACEOU& MODERATELY CALCAREOUa i SILTY CLAY W/SAND: LT OUVE GRAY TO OUVE GRAY VERY MOIST TO SATURATEa SOFT TO RRM, MEDIUM DENSE T NODULES OF WELL CEMENTED, HIGHLY CALCAREOUS SILT AND FINE SANa MODERATE PLASTICITY THIN SAND PARTINOa no SLOT STAINLESS STEEL SCAEEN 18 18 20. SAND- DKQRAY VERY MOIST TO SATURATEa DENSE VERY RNE TO MEDIUM SUB^QULAR SANO QRAINa HIGHLY MICACEOU& ^LOCKINO WELL CAP CO] pnoTEcnve .STEEL SURFACE CASINO • 2/90 -3- INITIAL LEVEL tO-40 MESH SIUCA SAMO .CAP TO-IS- EarthFax Englnaerina Inc. CHEVRON USA INC. SALT LAKE CITY REFINERY SALT LAKE Cmr, UTAH MONrrOR WELL EF-3 I I I I I I k k k k k k k k k k DRILL HOLE LOG MONITOR WELL E7-3 0.0' - 2.5' Construction Fill; Typically sandy gravels and gravelly sands. Bank run material imported as engineered fill. Thickness varies across the site. GM-SM to GP-SP 2.5' - 3.0': ailty CLAY; Very dark grayish brown (2.5Y3/2), deu&p, stiff, organics, friable at present %m, mod. plasticity, earthy odor. CL 3.0' - 3.5': alltv CLAY/clavev SILT; Grayish brown to light grayish brown (2.5Y4/2-5/2), moist, firm to stiff, mod. plasticity, mod. reaction to 10% HCL, faint product odor, some roots and other organics. CL-ML 3.5' - 5.0': clayey SILT w/slltv CLAY; Lt. olive gray (5Y6/2) , very moist, firm, mod. plasticity, strong product odor, strong reaction to 10% HCL. ML (CL) 5.0' - 5.5': clayey SILT; Pale yellow (2.5Y7/4) to light brownish gray (2.5Y6/2), moist, firm to stiff, organics (root hairs), mod. plasticity, some desiccation, strong product odor, mod. to strong reaction to 10% HCL. ML 5.5» - 6.0': alltv SAND; Grayish brown (2.5Y5/2), very moist, loose to med. dense, matrix is low plasticity, very fine to fine sub-angular to sub-rounded sand grains. SM 6.0' - 6.5': siltv CLAY; Lt. gray (2.5Y7/2) to light brownish gray (2.5Y6/2), moist, firm to stiff, moderate plasticity,some roots, strong reaction to 10% HCL, faint product odor. CL 6.5' - 7.5': clayey SILT: Light gray (5Y7/1), very moist, soft to firm, mod. plasticity, nodules & sand size clasts of silty, highly calcareous material (marl), some roots, strong reaction to 10% HCL, strong product odor. ML 7.5* - 8.0': SAND; Olive gray (5Y4/3), damp, loose to med. dense, very fine to fine, sub-rounded sand, highly micaceous, some silt, faint product odor. SP-(SM) 8.0' - 10.0': alltv SAND; Grayish brown (2.5Y5/2) to It. olive gray (5Y6/2), moist, med. dense, thin sections with predominantly mod. plastic silty clay, sand is very fine to fine grained, micaceous, strong reaction to 10% HCL, faint product odor. SM CHEVRON U.S.A Solt Lake Refinery I il 10.0' - 11.0': siltv CLAY v/sand; Lt. olive gray to olive gray (5Y5/2-6/2), very moist, soft to finn, mod. plastic l"-!- nodules of well cemented, highly calcareous silt emd sand, strong reaction to 10% HCL, faint product odor. CL 11.0' - 12.5': alltv CLAY; Lt. brownish gray (2.5Y6/2), moist, soft to firm, mod. plasticity, some mica & nodules, no product odor. CL-ML 12.5' - 14.5': alltv CLAY; Lt. brownish gray (2.5Y6/2), moist, soft to firm, some thin sandy partings, moderate plasticity. CL 14.5' - 18.0': SAND; Dk. gray (5Y4/1), moist, dense, very fine to medium s\ab-angular sand, mainly qtz. highly micaceous. SP CHEVRON U.5A Appendix C • APPENDIX C ANALYnCAL DATA REFINERY ANALYOCAL DATA JULY 1984 TO OCTOBER 1990 TABLE 2 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-1 S-1 S-1 S-1 S-1 S-1 s-1 DATE SAMPLED 7-20-M 8-27-84 9-24-84 10-25-84 2-4-85 4-25-85 11-4-85 MAJOR IONS (ffig/l except as noted) XCalcium (Ca) 280 0 244 0 196 0 186 0 124 0 160 0 418 0 y,Hagnesiun (Mg) 92 0 61 0 46.0 58.0 59.0 64 0 81 0 y Sodiun (Na) 1520 0 1120 0 826 0 1230 0 1330 0 1500 0 1420 0 <)CPotassiLin (K) 161 0 110.0 100.0 130 0 105 0 110 0 136 0 ^fcarbonate (HC03) «97 5 536.5 562.1 453 6 431 6 449 9 510 9 Carbonate (C03) < 3 0 < 3.0 < 3 0 < 3 0 < 3.0 9.6 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 0 Chloride (CI) 1940 0 1170.0 910 0 1840.0 1980.0 2150 0 2260 0 - Fluoride (F) 2 80 4.00 6.00 2.80 1.70 2.20 4 40 Sulfate (SM) 1200 0 1400.0 1010.0 740.0 410.0 420 0 1090 0 MINOR IONS (Rig/l) Nitrate^Nitrite (as N) < 1 .1 < .1 < .1 .1 < .1 < 1 Organic Nitrogen (as N) 1 1 2 3 1.3 .8 .2 .6 2 8 Annonia (as N) 5 0 3.7 2.6 3.9 5.2 5 2 4 1 Sulfide < .05 < .05 < .05 .06 < .01 < .05 < .05 TeUl Cyanide < .01 < .01 < .01 < 01 < .01 < .01 < 01 FIELD MEASUREMENTS Fveld pH 7.05 7.04 7.28 7.33 7 56 7.51 6 96 Sp. Conductance (unhos/cm) 7&00 0 7000.0 5200.0 7400 0 7400 0 7800 0 * OTHER PARAMETERS Lab pH (units) 7 40 7 49 7.60 7.37 7 70 7.64 7 22 Lab Conductivity (unhos/cm) 8270.0 6310 0 5360 0 7130.0 6940 0 7690 0 8130 0 Total Suspended Solids(ing/l) 12 0 20.0 < 2.0 7.0 5.2 < 2 0 12 0 Total Dissolved Solids(mg/l) 5370 0 4560 0 3550.0 a20.o 4260 0 4680 0 5480 0 Oil t Grease (iie/l) < 1.0 < 1.0 < 1.0 < 1 0 < 1.0 2.0 2 0 Total Organic Carbon (ing/1) 18 0 19.0 28 0 15.0 6.5 12.0 16 0 Total Organic Halogen ugCl/l 79 0 56.0 U.O 83.0 42 0 23 0 62 0 ALKALINITIES as n«/l CaCOS Total Alkalinity 408 0 440 0 461 0 372 0 354 0 385.0 419 0 Bicarbonate AUaUnity 408 0 440 0 461 0 372 0 354.0 369 0 419 0 Carbonate Alkalinity < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 16 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < .020 < .020 < .020 < .020 .015 .010 010 BariLni (6a) .150 .072 .059 .080 .100 .130 .090 Cadmiun (Cd) < 002 .003 < 002 < .020 < .090 < .090 < 040 Chromium Hex (Cr+6) < .010 < 010 < .010 < .100 < CIO < .010 < 010 •^Total Chromium (Cr) < .005 .009 .005 < .050 .050 < .050 < 050 Lead (Pb) < .025 < .025 < .025 < .250 < .300 < .300 < .250 — Manganese (Mn) .590 .560 430 .350 .220 .310 750 Mercury (Hg) < 0003 < 0002 < 0002 < .0002 < .0002 < 0004 < 0001 •' Nickel (Ni) < 010 .028 .020 .010 < .060 < .060 < 100 - Selenium (Se) < .020 < .020 < .020 < .030 < .002 .023 < 040 Silver(Ag) < 003 < 003 < .003 < 050 < .030 < 030 < 030 Vanadiim (V) < .002 .004 .002 < .020 < .050 < 050 < .020 Zinc (Zn) < .004 .074 < .004 < 040 < .040 < .040 040 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 2 (CONTINUED) CHEVRON SEMI -ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-1 s-1 S-1 s-1 S-1 s-1 s-1 DATE SAMPLED 5-1-86 10-28-86 4-24-87 10-29-87 5-2-88 11-3-88 5-3-89 NAJOR IONS (mg/l except as noted) Calciun (Ca) 158 0 120 0 140.0 366 0 688.0 500 0 982 0 Magnesiun (Mg) 67 0 58 0 64 0 110.0 140.0 120 0 200 0 Sodiun (Na) 1470 0 1400.0 1440.0 1800 0 2000.0 1910 0 2850 0 Potassiun (K) 121 0 120 0 120.0 160 0 170 0 150 0 200 0 Bicarbonate (HC03) 448 7 453 6 453.6 534.0 524.3 499.9 460 9 Carbonate (C03) < 3.0 < 3.0 < 3.0 < 3 0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (CI) 2090.0 2280.0 2310 0 2760 0 3540.0 3920 0 5530 0 Fluoride (F) 1.80 1.90 2.10 2 10 3.50 2.60 3 20 Sulfate (S04) 553.0 377.0 490.0 1150.0 1750.0 1090.0 1760 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 < .1 < 2 0 < .1 < 1 Organic Nitrogen (as N) < .1 < .1 .3 1.1 .6 < 1 0 < .5 Ammonia (as N) 5 2 S 8 5.4 5.7 4.9 6 1 6.6 Sulfide < .05 .11 .06 < .05 < .05 .10 < .05 Total Cyanide < .01 < .01 < .01 .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7.52 7.56 7.36 7.38 6.87 7.10 6 48 Sp Conductance (unhos/cm) 8300 0 7300 0 7350 0 12000.0 13000 0 14000 0 20000 0 OTHER PARAMETERS Lab pH (units) 8 01 7.61 7.43 7.34 7.20 7.50 7.00 Lab Conductivity (unhos/cm) 8050 0 7750 0 7980.0 9910.0 12300.0 14000.0 17200 0 Total Suspended Sol{ds(mg/l)< 10 0 < 5 0 16.0 72.0 21.0 16 0 15 0 Total Dissolved Sol{ds(fflg/l) 4220 0 4050.0 4800 0 6530.0 7670.0 8080.0 11800 0 Oil 1, Grease (mg/l) < .5 < .5 < 1.0 < 1.0 < 1.0 < 1 0 1.0 Total Organic Carbon (mg/l) 29 0 5 9 6 1 11.0 14.0 4.3 11.0 Total Organic Halogen ugCl/l 91.0 41.0 100 0 220.0 250.0 228 0 560 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 368 0 372.0 372 0 438 0 430.0 410 0 378 0 Bicarbonate Alkalinity 368 0 372 0 372 0 438 0 430 0 410 0 378 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (R^/t) Arsenic (As) .007 .010 .018 .032 .031 .014 < .020 Barium (Ba) .093 .100 .110 .160 .060 .140 .070 Cadmium (Cd) < .008 < .008 < .010 < .010 < .030 < 030 < .030 Chroffliun Hex (Crt'6) < 010 < .010 < .010 < .010 < .010 < .010 < 010 Total Chroffliun (Cr) < 010 < .010 < .010 < .020 < .050 < .050 < .050 Lead (Pb) < 040 < .040 < .002 < .004 .002 < .004 < .010 Manganese (Mn) .270 .150 .240 .700 1.800 1.200 3 200 Mercury (Hg) < .0001 < .0001 < 0001 < 0001 < .0001 < 0001 < .0001 Nickel (Ni) < .020 < .020 < .080 < .080 < .200 < .200 < 200 Seleniun (Se) < 020 < .010 .005 < .020 < .040 < .020 < .020 Silver(Ag) < .006 < .006 < .010 < 010 < .030 < .030 < .030 Vanadiun (V) < 004 < .004 < .020 < .020 < .050 < .050 < .050 Zinc (Zn) < .008 .010 < 020 < .020 < .050 < .050 < 050 Parameter value is less than given detection limits Parameter was not analyzed TABLE 2 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-1 S-1 S-1 DATE SAMPLED 11-2-89 4-25-90 10-25-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 310.0 1290 0 464.0 Magnesiun (Mg) 92 0 272.0 144.0 Sodium (Na) 1850.0 4110.0 2310.0 Potassiun (K) 150 0 239 0 153.0 Bicarbonate (HC03) 407.2 464.5 538.9 Carbonate (C03) < 3.0 < 3.0 34.8 Hydroxide (OH) .0 .0 .0 Chloride (CI) 3140.0 7930 0 4510 0 Fluoride (F) 2 20 3.20 4 40 Sulfate (S04) 579.0 1950.0 784.0 MINOR IONS (mg/t) Nftrate^Nitrite (as N) < .1 < .1 < .1 Organic Nitrogen (as N) 1.2 < 2 5 1.3 Amnonia (as N) 5.5 7.1 5.6 Sulfide < .05 < .05 .12 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 97 6 80 7.27 Sp. Conductance (unhos/cm) 10000.0 24000.0 14000.0 OTHER PARAMETERS Lab pH (units) 8.00 6.90 8.50 Lab Conductivity (urhos/cm) 8800.0 19100.0 13000.0 Total Suspended SoMdsdng/l) 5.0 20 8 26 0 Total Dissolved Solids(mg/l) 6320.0 16100.0 8750.0 Oil t Grease (mg/l) 1.0 77.0 7.8 Total Organic Carbon (mg/l) 4.6 7.5 6 0 Total Organic Halogen ugCl/l 80.0 157.0 85.4 ALKALINITIES as «ig/l CaC03 Total Alkalinity 334 0 381.0 500 0 Bicarbonate Alkalinity 334.0 381.0 442.0 Carbonate Alkalinity < 5.0 < 5.0 58.0 TRACE METALS (mg/l) Arsenic (As) < .005 < .010 < .010 Barium (Ba) .080 < .100 .088 CadmiLin (Cd) < .030 < .050 < .025 Chromium Hex (Cr^6) < .010 < .010 < .010 Total Chromium (Cr) < 050 < .100 .050 Lead (Pb) < .010 < .050 < .200 Manganese (Mn) .440 4 500 1.200 Mercury (Hg) < .0002 < .0002 < .0002 Nickel (NI) < .200 < .400 < .200 Seleniun (Se) < .020 < .100 < .010 Silver(Ag) < .050 < .100 < .050 Vanadiun (V) < .050 < .100 < .050 Zinc (Zn) < .050 < .100 < .050 Parameter value is less than given detection limits Parameter was not analyzed TABLE 2 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-1 7-20-84 S-1 8-27-84 S-1 9-24-84 S-1 10-25-84 S- 2- 1 4-85 $-1 4-25-85 S- 11- 1 4-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 Chloroform < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 100.0 < 5 0 Cyclohexane < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 Toluene < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 n-Xylene < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 o,p-Xylene < 5 0 * 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Xylenes,Total * * * • • * • BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 •t^p-Cresol < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Acetone 18000 0 270 0 < 10 0 < 10.0 < 10.0 44.0 < 10.0 Acetonitrile < 100 0 < 100.0 < 100 0 < 100.0 < 100.0 < 100 0 < 100 0 Aniline < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10.0 < 10 0 < 10.0 < 10.0 < 10.0 < 10 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 95.0 26 0 25 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenot < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5.0 5.0 7.0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Methyl mercaptan < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 l-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < « 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 1u 0 < 10.0 < 10 0 < 10 0 PentachIorophenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using netho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed SAMPLE IDENTIFICATION DATE SAMPLED 1-86 TABLE 2 (CONTINUEO) CHEVRON SEMI-ANNUAL SAMPLE DATA S-1 10-28-86 S-1 4-24-87 S-1 10-29-87 S-1 5- 2-88 S- 11-3-88 3-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5.0 5.0 < 5.0 < 5 0 < 5 0 Chloroform < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 Toluene < 5 0 < 5.0 < 5.0 < S.O < 5 0 < 5 0 < 5 0 1,1,1-Tr1 eh Ioroethane < 5.0 < 5.0 < S.O < 5.0 < S.O < 5.0 < 5 0 m-Xylene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 * • o,p-Xylene < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 * * Xylenes,Total • • * • * < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 m^-p-Cresot < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 420.0 < 25.0 < 25.0 < 25.0 < 25 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100.0 < 100 0 < 100 0 Am line < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10.0 • • • • • Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25.0 < 25 0 < 25 0 < 25.0 2,4-Dimethylphenol < 5 0 < 5.0 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Oi-n-octylphthalate < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 PentachIorophenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4). Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 2 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-1 S-1 S-1 DATE SAMPLED 11-2-89 4-25-90 10-25-90 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5 0 < 5.0 Chloroform < 5.0 < 5.0 < 5.0 Cyclohexane (2) < 10 0 • * Ethylbenzene < 5 0 < 5.0 < 5.0 Toluene < 5 0 < S.O < 5 0 1,1,1-Trichloroethane < 5 0 < 5 0 < 5.0 •1 Xylene • • • o,p-Xylene • • • Xylenes,Total < 5 0 < 5 0 < 5.0 SASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5.0 Naphthalene < 5.0 < S.O < 5.0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5.0 mt-p-Cresol < 5 0 < 5.0 < 5 0 Phenol < 5.0 < 5.0 < 5.0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < 5.0 Acetone < 10.0 < 10 0 < 10 0 Acetonitrile (1) < 100 0 • • Aniline < 5.0 < 5 0 < 5.0 Benzenethiol (4) • * « Bis(2-ethylhexyl)phthalate < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Diinethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 3-Methyichotanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 • • 1-Methylnaphthalene (3) < 5 0 • • 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 4-MethyI-2-pentanone < 10 0 < 10 0 < 10 0 Pentt lorophenol r> < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5.0 < 5 0 (1) . Identification of this compound is by laboratory reference mass spectrum onl quantitation is an estimate based on a 1 1 response with interenal standard (2) : Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits *. Parameter was not analyzed \ TABLE 3 \ V \ \ CHEVRON SEMI -ANNUAL SAMPLE DATA^ \ 1 SAMPLE IDENTIFICATION S-2 S-2 S-2 S-2 S-2 s-2 S-2 DATE SAMPLED 7-16-84 8-23-84 9-18-84 10-19-84 2-5-85 4-26-85 11-6-85 MAJOR IONS (mg/l except as noted) Calcium (Ca) 469.0 487.0 480 0 440 0 421 0 520 0 547 0 Magnesiun (Mg) 2740.0 1590.0 1480 0 1400 0 3160 0 3300 0 1710 0 Sodium (Na) 2070 0 1350.0 1320 0 1400.0 1670 0 1900 0 1510 0 Potassium (K) 175.0 104.0 99 0 100.0 130 0 160 0 112 0 Bicarbonate (HC03) < 6 1 90.2 71.9 37.8 < 6.1 < 6.1 < 6 1 Carbonate (C03) < 3.0 < 3.0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) 0 .0 .0 .0 .0 0 0 Chloride (CI) 460 0 332 0 294.0 360 0 460 0 439.0 261 0 Fluoride (F) < ,10 .30 .50 .84 .40 .30 .40 Sulfate (S04) 18700 0 13600.0 11200.0 11300.0 18000 0 23300 0 11500 0 MINOR IONS (mg/l) Nitrate^Nitrite (as N) < 2 .6 < .1 < 1 < .2 < 1 < 1 Organic Nitrogen (as N) 51.0 7.9 17.0 32 0 55 0 39 0 21 0 Ammonia (as N) 17 0 1.5 15 0 17.0 19.0 19 0 24 0 Sulfide .40 .08 1.10 90 .56 1.00 .65 Total Cyanide -03 .02 < .01 .01 .02 .02 < .01 FIELD MEASUREMENTS Field pH 4 58 4 64 4 71 4 81 4.70 4.40 4 84 Sp. Conductance (unhos/cm) 22000 0 14000 0 12000 0 15000.0 17500 0 18000 0 * OTHER PARAMETERS Lab pH (units) 4 57 4 70 4.68 4 64 4.69 4.23 4 40 Lab Conductivity (Linhos/cm) 18500 0 14100 0 13500 0 13400 0 17000 0 21800 0 14300 0 Total Suspended Solids(mg/l) 115 0 314 0 141.0 201.0 241.0 305 0 330 0 Total Dissolved Sot{ds(ing/l) 29400 0 20000.0 18200.0 17900.0 39100 0 37000.0 19700 0 Oil & Grease (mg/l) 38 0 44 0 31.0 21.0 62 0 64 0 49 0 Total Organic Carbon (mg/l) 1300 0 1200 0 1200 0 980 0 1300 0 1600 0 1300 0 Total Organic Halogen ugCl/l 680 0 1390 0 440 0 660 0 740 0 49 0 680 0 ALKALINITIES as mg/l CaC03 Total Alkalinity < 5 0 74 0 59 0 31 0 < 5 0 < 5 0 < 5 0 Bicarbonate Alkalinity < 5 0 74.0 59 0 31 0 < 5 0 < 5 0 < 5 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) <J / / / Arsenic (As) .100 .070 .034 .130 .160 .370 090 Banun (Ba) .080 .070 .050 < .050 < 050 < .050^ < 050 Cadniun (Cd) < .020 < .020 < .020 < .020 < .C?o .070^ < 040 Chromiun Hex (Cr+6) < 1 000 < 010 < .010 < 010 < 010 < .010 < 010 Total Chromiun (Cr) .290 .270 .230^ .220' .620' 1 300 .190 Lead (Pb) < 2S0 < 250 < .250 < .250 < 300 .510 < 250 Manganese (Mn) 26.000 23 000 21 000 14 000 33 000 44 000 19 000 Mercury (Hg) < .0030 < .0020 < .0002 < .0002 < .0002 < 0002 < 0001 Nickel (NO 450 .400 .300 .270 .760 1.300 530 Selenium (Se) < .200 < .020 < 200 < .300 < .400 < .400 < 080 SiIver(Ag) < 030 < .030 < 030 < 050 < 030 < .030 < 030 Vanadium (V) .110 .090 .070 040 .230 300 100 Zinc (Zn) .250 .210 .140 < .040 < 040 .060 060 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 3 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-2 S-2 S-2 S-2 S-2 s-2A S-2A DATE SAMPLED 5-1-86 10-30-86 4-23-87 10-29-87 5-3-88 11-1-88 5-2-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) 601 0 560.0 470.0 450 0 460 0 380 0 470 0 Magnesiun (Mg) 3580.0 2480.0 4010.0 2310 0 2570 0 3250.0 4280 0 Sodiun (Na) 1710.0 1660 0 1880.0 1470 0 1460 0 1380 0 1590 0 Potassiun (K) 151.0 170.0 280 0 220 0 310 0 220 0 260 0 Bicarbonate (HC03) < 6 1 < 6.1 < 6.1 < 6 1 < 6 1 < 6 1 < 6 1 Carbonate (C03) < 3.0 < 3.0 < 3.0 < 3 0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) 0 .0 .0 .0 .0 .0 .0 Chloride (CI) 277.0 418.0 294 0 317.0 292.0 20.0 234.0 Fluoride (F) .20 < .10 .20 .30 .10 .10 .30 Sulfate (S04) 25000 0 16800.0 25600 0 23500.0 35100 0 28800 0 33300 0 MINOR IONS (mg/l) .2 Nitrate+Nitrite (as N) < .5 < .1 < .1 < .1 < 2 0 < .1 < .2 Organic Nitrogen (as N) 30.3 29 0 < .1 < 1 0 83 0 132 0 63.0 Ammonia (as N) 24 0 20.0 33.0 35 0 37 0 26 0 27 0 sulfide .55 1.10 .12 < 5 00 .93 5 10 .08 Total Cyanide 01 .03 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 4 45 4.47 3 97 3 99 3 93 H 13 3 48 Sp Conductance (unhos/cm) 18000 0 17000.0 22000.0 20000 0 2100 0 20000 0 26000 0 OTHER PARAMETERS Lab pH (units) 4 15 3.96 3.77 4.26 4.20 4.20 4 10 Lab Conductivity (unhos/cm) 21400 0 19400 0 26600 0 19000.0 23300 0 19000 0 23400 0 Total Suspended Solids(ing/l) 490 0 570.0 44.0 220 0 U 0 20 0 28 0 Total Dissolved Solids(mg/l) 30100 0 31400 0 60200.0 32300.0 53300 0 42900 0 48400 0 Oil t Grease (mg/l) 23 0 362.0 < 1.0 54 0 75.0 45.0 Total Organic Carbon (mg/l) 1400 0 1480 0 2000 0 1970 0 1970 0 1600 0 2270 0 Total Organic Halogen ugCl/l 570 0 169.0 59 0 31 0 8700 0 181.0 270 0 ALKALINITIES as mg/l CaC03 Total Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Bicarbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 TRACE METALS (mg/l) J J J Arsenic (As) .300 .080 .800 .040 < .060 < 030 < 020 Bartun (Ba) < .050. < .025 .070 < .030 < .050 < 030 < 050 Cadmiun (Cd) 040 < 020 < .030 < .03'^ < .050 < 030 < 050 Chromium Hex (Cr+f < 020 < 010 / < .010 < 010 < 010 < .010 < 010 Total Chromiun (Cr) 1.800" 1.000"^ • 4.600'' 2 000^ 4 500 2 200 2 900 Lead (Pb) < .200 < .100 .011 < 020 < 040 < 020 < .080 Manganese (Mn) 48 000 28 000 58 000 32 000 60 000 44 000 65 000 Mercury (Hg) < .0001 < .0001 < 0001 < .0001 < .0001 .0007 < 0001 Nickel (NI) 1 600 1 000 2.200 1.200 2.400 1.500 2.200 Selenium (Se) < 400 < Z.ooo .072 < 002 < .400 < .100 < 400 Silver(Ag) .050 < 015 < .030 < 030 < .050 < 030 < .050 Vanadium (V) .360 .160 .530 .300 .400 .320 400 Zinc (Zn) .230 .110 .070 .220 .100 < 050 < 100 Parameter value is less than given detection limits Parameter was not analyzed TABLE 3 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-2A 11- 2-89 S-2A 4-26-90 S-2A 10-25-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 450 0 438.0 440 0 Magnesiun (Mg) 3540 0 4320.0 3430 0 Sodiun (Na) 1620 0 1590.0 1530.0 Potassiun (K) 250 0 263.0 177 0 Bicarbonate (HC03) < 6 1 94 4 < 6 1 Carbonate (C03) < 3.0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (CD 289.0 230.0 218.0 Fluoride (F) .20 .15 .22 Sulfate (S04) 26500 0 32100.0 25900.0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 Organic Nitrogen (as N) 92 0 138.0 111.0 Annonia (as N) 19.0 19.5 24 4 Sulfide < .05 2.80 4 50 Total Cyanide .03 < .01 < .01 FIELD MEASUREMENTS Field pH 3 82 4 16 4.02 Sp Conductance (unhos/cm) 16000 0 27000 0 24000.0 OTHER PARAMETERS Lab pH (units) 4.20 7.60 4 30 Lab Conductivity (unhos/cm) 16800 0 19900 0 20500 0 Total Suspended Solids(mg/l) 74 0 886.0 157.0 Total Dissolved Solids(mg/l) 39800 0 49500.0 37300 0 Oil & Grease (mg/l) 21 0 32 7 16 5 Total Organic Carbon (mg/l) 2420 0 1830 0 1840 0 Total Organic Halogen ugCl/l 50 0 821 0 68 2 ALKALINITIES as mg/l CaC03 Total Alkalinity < 5 0 77 4 < 5.0 Bicarbonate Alkalinity < 5 0 77.4 < 5.0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 TRACE METALS (mg/l) Arsenic (As) < 100 < .025 .052 Banun (Ba) < .100 .110 .310 Cadmiun (Cd) < .050 < .050 < .025 Chromium Hex (Cr+6) < .010 < .010 < .010 Total Chromium (Cr) 1 100 3 100 1 100 Lead (Pb) < .050 < 100 < .500 Manganese (Mn) 44 000 62 900 36 200 Mercury (Hg) < .0002 < .0002 < .0002 Nickel (Ni) 1 300 2 200 1.200 Selenium (Se) < 100 < .200 < 010 SiIver(Ag) < 100 < .100 < .050 Vanadiun (V) .300 .480 .180 Zinc (Zn) .100 < .100 .071 Parameter value is less than given detection limits Parameter was not analyzed TABLE 3 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-2 7-16-84 S-2 8-23-84 S-2 9-18-84 S-2 10-19-84 S-2 2- 5-85 S-2 4-26-85 S-2 11- 6-85 ORGANIC COMPOUNDS iiiLe» (ug/i; Benzene 110.0 100 0 36 0 80.0 < 100.0 k 100 0 98.0 Chloroform < 5 0 < 5.0 < 5.0 < 5.0 < 100 0 k 100 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10 0 < 10.0 < 200.0 < 200 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < 5 0 < 5.0 < 100 0 < 100 0 < 5 0 Toluene < 5.0 15.0 20.0 20.0 < 100 0 < 100 0 < 5 0 1,1,1 -Tn ch loroethane n-Xylene < 5.0 < 5.0 < 5 0 < 5 0 < 100 0 < 100 0 < 5 0 1,1,1 -Tn ch loroethane n-Xylene < 5.0 < 5.0 < 5.0 < 5 0 < 100 0 < 100 0 < 5 0 o,p-Xylene < 5.0 < 5.0 < 5 0 < 5.0 < 100.0 < 100 0 < 5 0 Xylenes,Total * • • • • • * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 500 0 < 5.0 < 5.0 < 5.0 < 200.0 < 200 0 < 250 0 Naphthalene < 500 0 < 500.0 < 500.0 < 500.0 < 200.0 < 200 0 < 250 0 ACID COMPOUNDS (ug/l) o-Cresol m+p-Cresol Phenol OTHER DETECTED ORGANICS (ug/l) 92000 0 360000 0 110000.0 85000.0 260000 0 120000 0 100000.0 220000.0 77000 0 100000.0 240000.0 100000.0 82000.0 150000.0 130000.0 49000 0 150000 0 120000 0 48000 0 140000 0 68000 0 Acenaphthene < 500.0 < 500.0 < 500 0 < 500.0 < 200.0 < 200 0 < 250.0 Acetone 7800.0 11000 0 5700.0 4200.0 1600.0 4800.0 1800 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 2000 0 < 2000 0 < 100 0 Am line 1400 0 5800 0 3100.0 < 500 0 4500 0 2800 0 1100 0 Benzenethiol (4) < 1000 0 < 1000 0 < 1000.0 < 1000 0 690 0 < 400 0 < 500 0 Bis(2-ethylhexyl)phthalate < 500 0 < 500 0 < 500 0 < 500 0 < 200 0 < 200 0 < 250 0 2-Butanone 1200 0 1100 0 42 0 < 10 0 250 0 780 0 310 0 Carbon Disulfide 42 0 38 0 54 0 45 0 < 100 0 < 100 0 46 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 200 0 < 200 0 < 10 0 2,4-Dimethylphenol 16000.0 17000 0 29000.0 24000 0 11000 0 6800 0 12000 0 Di-n-octylphthalate < 500 0 < 500 0 < 500.0 < 500 0 < 200 0 < 200 0 < 250 0 2-Hexanone 75 0 49 0 36 0 < 10.0 < 400 0 < 200 0 < 10 0 Indene < 500 0 < 500.0 < 500 0 < 500 0 < 200 0 < 200 0 250 0 3-MethyIchoIanth rene < 5 0 < 5 0 < 5 0 < 5 0 < 200 0 < 200 0 < 250 0 Methyl mercaptan < 20 0 < 20 0 < 20.0 < 20 0 < 20.0 < 20 0 < 20 0 1-Methylnaphthalene < 500 0 < 500 0 < 500 0 < 500 0 < 200 0 < 200 0 < 250 0 2-Methylnaphthalene < 0 < 500 0 < 500 0 < 500 0 < 200 0 < 200 0 < 250 0 4-Methyl-2-pentanone 76 0 < 10.0 < 10 0 < 10 0 < 200 0 < 200 0 < < 10 0 Pent achIorophenoI < 500 0 < 500 0 < 500 0 < 500 0 < 200 0 < 200 0 < 250 0 Ouinoline < 500 0 < 500 0 < 500 0 < 500.0 5000.0 5100 0 < 250 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 3 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) S-2 5- 1-86 S-2 10-30-86 S-2 4-23-87 S-2 10-29-87 S-2 5- 3-88 S-2A 11- 1-88 ACID COMPOUNDS (ug/l) 0-Cresol 39000 0 oi+p-Cresol 110000.0 Phenol 71000 0 OTHER DETECTED ORGANICS (ug/l) 49000.0 180000.0 99000.0 56000.0 150000.0 97000 0 81000 0 190000 0 140000 0 74000 0 200000 0 170000 0 78000 0 230003 0 110000 0 (4) Not consistently recovered using metho 8240/8270 ( Parameter value is less than given detection limits " Parameter was not analyzed S-2A 5- 2-89 Benzene 63 0 78.0 78 0 46 0 < 120 0 < 5 0 < 120 0 Chloroform < 25.0 < 50.0 < 60 0 < 25 0 < 120 0 < 5 0 < 120 0 Cyclohexane < 50.0 < 100.0 < 120.0 < SO 0 < 250 0 < 10 0 < 250.0 Ethylbenzene < 25.0 < 50.0 < 60.0 < 25.0 < 120.0 < 5 0 < 120 0 Toluene < 25.0 < 50.0 < 60 0 < 25 0 < 120 0 < 5 0 < 120 0 1,1,1-Trichloroethane < 25 0 < 50 0 < 60 0 < 25 0 < 120 0 < 5 0 < 120 0 m-Xylene < 25 0 < SO 0 < 60.0 < 25.0 < 120 0 • • o,p-Xylene < 25.0 < SO 0 < 60.0 < 25 0 < 120 0 • * Xylenes,Total • • * • * < 5 0 < 120 0 E/NEUTRAL COMPOUNDS (ug/l) Anthracene < 100 0 < 50.0 < 2800.0 < 6500.0 < 25000 0 < 5000 0 < 11000 0 Naphthalene < 100.0 < 50 0 < 2800 0 < 6500.0 < 25000.0 < 5000 0 < 11000 0 93000 0 260000 0 160000 0 Acenaphthene < 100 0 < 50 0 < 2800 0 < 6500 0 < 25000 0 < 5000 0 < 11000 0 Acetone 5200.0 5600.0 4900.0 3500.0 6600 0 < 25 0 4100 0 Acetonitn le < 500 0 < 1000.0 < 1200 0 < 500 0 < 2500.0 < 100 0 < 2500 0 Aniline < 100 0 < 50.0 < 2800 0 < 6500 0 < 25000 0 5700.0 12000 0 Benzenethiol (4) < 200 0 < 100 0 • • * * • Bis(2-ethylhexyl)phthalate < 100.0 < 50 0 < 2800 0 < 6500 0 < 25000 0 < 5000 0 < 11000 0 2-Butanone 550.0 1300.0 1600 0 1100 0 1800 0 < 25 0 1400 0 Carbon Disulfide 40 0 < 50 0 76 0 45.0 < 125 0 < 5 0 < 120 0 Oichloromethane < 50.0 < 100 0 < 120 0 < 120 0 < 625 0 < 25 0 < 620 0 2,4-Diinethylphenol 2600.0 11000 0 6300 0 11000 0 < 25000 0 10000 0 13000 0 Di-n-octylphthalate < 100 0 < 50.0 < 2800.0 < 6500.0 < 25000 0 < 5000 0 < 11000 0 2-He anone < 50.0 < 100.0 < 120 0 54.0 < 250 0 < 10 0 < 250 0 Indene < 100 0 < 50.0 < 2800.0 < 6500 0 < 25000.0 < 5000 0 < 11000 0 3-Methylcholanthrene < 100 0 < 50 0 < 2800 0 < 6500.0 < 25000 0 < 5000 0 < 11000 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 2300.0 < 20 0 < 20 0 2900 0 1-Methylnaphthalene < 100 0 < 50 0 < 2800.0 < 6500 0 < 25000.0 < 5000 0 < 11000 0 2-Methylnaphthalene < 100 0 < 50 0 < 2800 0 < 6500 0 < 25000 0 < 5000 0 < 11000 0 4-Methyl-2-pentanone < 200 0 < 100 0 < 120 0 < 50.0 < 250 0 < 10 0 < 250 0 Pentach lorojshenol < 100 0 < SO 0 - < 2800 0 < 6500 0 < 25000 0 < 5000 0 < 11000 0 Ouinoline < 100 0 < 50.0 < 2800 0 < 6500 0 < 25000 0 < 5000 0 < 11000 0 1 I SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) TABLE 3 CHEVRON SEMI-ANNUAL SAMPLE DATA S-2A 11- 2-89 S-2A 4-26-90 S-2A 10-25-90 Benzene < 250 0 < 250 0 < 250.0 Chloroform < 250 0 < 250.0 < 250 0 Cyclohexane (2) < 500 0 * • Ethylbenzene < 250 0 < 250 0 < 250.0 Toluene < 250 0 < 250.0 < 250.0 1,1,1-Triehloroethane m-Xylene < 250 0 < 250.0 < 250.0 1,1,1-Triehloroethane m-Xylene • • • o,p-Xylene * • • Xylenes,Total < 250 0 < 250 0 < 250 0 5000 0 5000 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 10000 0 < 2500.0 Naphthalene < 10000.0 < 2500.0 ACID COMPOUNDS (ug/l) o-Cresol 100000.0 89000.0 6700 0 mfp-Cresol 320000 0 250000 0 170000.0 Phenol 240000 0 190000.0 150000.0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 10000 0 < 2500 0 < 5000 0 Acetone 5000 0 660.0 3500 0 Acetonitrile (1) < 5000 0 * • Am line < 10000 0 < 2500 0 < 5000 0 Benzenethiol (4) • • * Bis(2-ethylhexyl)phthalate < 10000 0 < 2500 0 < 5000 0 2-Butanone 1500.0 < 500 0 1700 0 Carbon Disulfide < 250 0 < 250 0 < 250 0 Oichloromethane < 250 0 < 250 0 < 250 0 2,4-Dimethylphenol < 10000 0 18000.0 12000 0 0i-n-octylphthalate < 10000 0 < 2500 0 < 5000.0 2-Hexanone < 500 0 < 500.0 < 500 0 Indene < 10000 0 < 2500 V < 5000 0 3-Methylcholanthrene (2) < 10000 0 < 2500.0 < 5000 0 Methyl mercaptan (2) 2800 0 • • 1-Methylnaphthalene (3) < 10000 0 • • 2-Methylnaphthalene < 10000 0 < 250'' 0 < 5000 0 4-Methyl-2-pentanone < 500 0 < SOU 0 < 500 0 Pentachlorophenol < 10000 0 < 2500.0 - < 5000 0 Ouinoline < 10000 0 < 2500 0 < 5000 0 (1) Identification of this compound is by laboratory reference mass spectrum onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 4 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S- DATE SAMPLED 7- 4 10-84 S-4 8-15-84 S- 9- 4 10-84 S-4 10-23-84 s- 2- 4 1-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) 144.0 131 0 114.0 91.0 125 0 Magnesiun (Mg) 92.0 83.0 73.0 61 0 106 0 Sodium (Na) 629.0 545.0 486.0 500 0 703 0 Potassiun (K) 28.0 25 0 25 0 36 0 45 0 Bicarbonate (HC03) 480.4 490.1 495.0 548 7 634 0 Carbonate (C03) < 3.0 < 3.0 < 3.0 < 3.0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 Chloride (CI) 520.0 488 0 452.0 400.0 700.0 Fluoride (F) 1.00 1.00 1.30 1.70 1.60 Sulfate (S04) 790.0 699.0 U5.0 584.0 840 0 MINOR IONS (n«/l) Nitrate+Nitnte (as N) 6 8 9 0 9.5 11.0 2 4 Organic Nitrogen (as N) .7 1.6 1.2 .8 .8 Annonia (as N) < .1 < .1 < .1 < .1 < .1 Sulfide < .05 < .05 < .05 < .05 < .05 Total Cyanide < .01 < .01 < .01 < 01 < .01 FIELD MEASUREMENTS Field pH 7 71 7.15 7.38 7 66 7.58 Sp Conductance (unhos/cm) 3900 0 3700 0 3400 0 3200 0 4600 0 OTHER PARAMETERS Lab pH (units) 7.44 7.38 7 82 7 76 7.78 Lab Conductivity (unhos/cm) 3960 0 3580 0 3220 0 3240 0 4220 0 Total Suspended Solids(mg/l)< 2.0 2 0 2 0 4.0 6.0 Total Dissolved Solids(mg/l) 2660 0 2340 0 2040 0 1860.0 3280 0 Oil t Grease (mg/l) < 1 0 < 1 0 < 1 0 < 1.0 1 0 Total Organic Carbon (mg/l) 14 0 17 0 13.0 10 0 12 0 Total Organic Halogen ugCl/l 20 0 69 0 70 0 71 0 86.0 ALKALINITIES as mg/l CaC03 Total Alkalinity 394 0 402 0 406 0 450 0 520 0 Bicarbonate Alkalinity 394 0 402 0 406 0 450 0 520 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .044 .023 .026 .049 090 Barium (Ba) .029 .025 .022 .027 .034 Cadrr'jn (Cd) < .002 < .002 < 002 < .002 < .045 Chromiun Hex (Cr+6} < .010 < .010 < .010 < .010 < .010 Total Chromiun (Cr) .009 006 • < .005 < .005 < .025 Lead (Pb) < .025 < .025 < .025 < .025 < .150 Manganese (Mn) .012 021 007 < .005 .028 Mercury (Hg) < .0003 < .0002 < .0002 < 0002 < 0002 Nickel (Ni) < .010 < .010 < .010 < .010 < 030 Selenium (Se) < 020 < 020 < .020 < .030 006 Silver(Ag} < 003 < .003 < .003 < 005 < 015 Vanadium (V) .018 .018 .014 .021 < .025 Zinc (Zn) < 004 .043 019 < .004 < 020 S-4 4-29-85 130. 94. 730 41 577 3 .0 .0 0 0 9 0 .0 551 0 1.60 792.0 1,8 .8 1 10.00 .11 7 39 4600 0 7.36 4240 0 2 0 2920,0 1 0 12,0 130 0 474,0 474,0 5 0 / .050 .026 .045 010 025 150 .025 0002 .030 .050 .015 .017 020 S-4 10-29-85 107 62 378 25 536 3 0 0 0 0 5 0 0 424 0 1 20 434 0 6 0 .7 2 05 .01 7 42 7 82 2600 0 6 1800 1 17 22 440 0 440 0 5 0 .040 025 020 .010 025 .120 .025 .0001 050 002 015 010 020 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 4 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S- DATE SAMPLED 5- 4 2-86 S-4 11- 3-86 S-4 4-27-87 S-4 10-28-87 S-4 4-27-88 s- 11- 4 2-88 S- 5- 4 1-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) 83 0 110.0 118 0 98 0 173.0 88 0 149,0 Magnesiun (Mg) 61.0 75.0 91.0 62.0 143 0 63 0 108 0 Sodiun (Na) 524.0 460.0 561.0 332.0 706 0 283 0 437 0 Potassiun (K) 37 0 37.0 40.0 27.0 75 0 25 0 38 0 Bicarbonate (HC03) 526,7 579.1 581.6 418.2 534 0 518 2 414 5 Carbonate (C03) < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 0 Chloride (CI) 391.0 462.0 642.0 351.0 910.0 369 0 672 0 Fluoride (F) 1.60 1 50 1.S0 1.00 1.80 1.00 1 20 Sulfate (S04) 648 0 576.0 642.0 315.0 933.0 336 0 538 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) .6 2.1 < .1 2.0 2.0 2 2 3 6 Organic Nitrogen (as N) .6 .4 .6 < .1 .8 .3 4 Annonia (as N) < .1 < .1 < .1 < .1 .1 < .1 < 1 Sulfide < .05 < .05 < .05 < .05 < .05 < .05 < .05 Total Cyanide * .01 < .01 < .01 < .01 < .01 < .01 < 01 FIELD MEASUREMENTS Field pH 7,92 7 42 7.30 7,32 7.44 7.36 7.37 Sp. Condjctance (urtios/cm) 3100 0 3000.0 3400.0 2450.0 4600.0 2400 0 3400 0 OTHER PARAMETERS Lab pH (units) 7.78 8 21 8 06 7 59 7.80 7 40 7 60 Lab Conductivity (urhos/cm) 3330 0 3040 0 3870,0 2410.0 4950 0 2690 0 3210 0 Total Suspended Solids(mg/l) 11 0 < 2.0 < 10 0 < 2 0 4.0 < 2 0 < 5 0 Total Dissolved Solids(mg/l) 2040 0 1790 0 2500.0 1530.0 3120 0 1480 0 2140 0 Oil & Grease (mg/l) < 5 < .5 < 1.0 < 1.0 < 1 0 < 1 0 < 1 0 Total Organic Carbon (mg/l) 12 0 6 6 8.2 4.2 11 0 8 0 .9 Total Organic Halogen ugCl/l 58 0 59.0 52 0 100 0 63 0 40 0 61 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 432 0 475 0 477.0 434 0 438 0 425.0 340 0 Bicarbonate Alkalinity 432.0 475.0 477.0 343.0 438 0 425 0 340 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) / Arsenic (As) .035 .039 .038 .028 .050 .027 027 Banun (Ba) .020 020 .025 .024 .039 .025 .039 Cadmium (Cd) < .004 < .004 < .005 < .005 ^ < .005 < .005 < .005 Chromium Hex (Cr+6) < .010 < .010 < .010 < .010 < .010 < .010 < .010 Total Chromiun (Cr) < .005 < .005 < .005 < .010 < .010 < 010 < 010 Lead (Pb) < .020 < .020 < 002 < .002 < .004 < 004 < 004 Manganese (Mn) 170 < .005 020 012 061 < .005 < .005 Mercury (Hg) < ,0001 < .0001 < .0001 < 0001 < 0001 < .0001 < 0001 Nickel (NI) < ,010 < 010 < .040 < 040 < 040 < .040 < .040 Selenium (Se) < .004 < 004 < .002 < .004 < .004 .002 009 Silver(Ag} < .003 < 003 < .005 < .005 < .005 < .005 < 005 VanadiLin (V) .015 .017 .010 .010 < .010 .010 .010 Zinc (Zn) .006 .005 < .010 < .010 < .010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 4 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-4 DATE SAMPLED 10-31-89 S-4 4-26-90 S-4 10-29-90 MAJOR IONS (mg/l except as noted) Calcium (Ca) 110.0 122 0 97 9 Magnesiun (Mg) 70 0 91.9 65 3 Sodiun (Na) 290.0 402 0 266 0 Potassiun (K) 24 0 42 9 25.1 Bicarbonate (HC03) 434.1 437.7 403 6 Carbonate (003) < 3 0 < 3.0 < 3 0 Hydroxide (OH) .0 .0 .0 Chloride (CI) 337 0 537.0 341.0 fluoride (F) 1 00 1.10 1.00 Sulfate (S04) 301.0 393.0 294.0 MINOR IONS (mg/l) 2.0 Nitrate+Hitnte (as N) 2.9 2.0 2.5 Organic Nitrogen (as N) < .5 < .5 < .5 Ammonia (as N) < .1 < .1 < .1 Sulfide < .05 < .05 < .05 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 51 7.61 7.31 Sp Conductance (unhos/cm) 2400,0 3000 0 2000.0 OTHER PARAMETERS Lab pH (units) 7.70 7.60 8 10 Lab Conductivity (uitios/cm) 2010.0 2740 0 2100 0 Total Suspended Solids(mg/l)< 2 0 < 2 0 4.4 Total Dissolved Solids(mg/l) 1410 0 1910.0 1320.0 Oil & Grease (mg/l) 2 0 < 1.0 1.4 Total Organic Carbon (mg/l) 3.6 5.2 3.0 Total Organic Halogen ugCl/l 40 0 76 4 32 5 ALKALINITIES as mg/l CaC03 Total Alkalinity 356 0 359.0 331.0 Bicarbonate Alkalinity 356 0 359 0 331 0 Carbonate Alkalinity < "i 0 < S.O < 5.0 TRACE METALS (mg/l) Arsenic (As) .022 .031 < .025 Banun (Ba) .030 .031 .026 Cadmiun (Cd) < .005 .005 < .005 Chromium Hex (Cr+6) < .010 < 010 < .010 Total Chromium (Cr) < 010 < 010 < 010 Lead (Pb) < .005 < .010 < .010 Manganese (Mn) < .010 < 010 < .010 Mercury (Hg) < .0002 < .0002 < 0002 Nickel (NO < 040 < 040 < 040 Selenium (Se) < .005 < 010 < 010 Silver(Ag) < 010 < .010 < 010 Vanadium (V) < .010 .013 < .010 Zinc (Zn) < 010 .014 < .020 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 4 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-4 7-10-84 S-4 8-15-84 S-4 9-10-84 S-4 10-23-84 S-4 2- 1-85 S-4 4-29-85 S-4 10-29-85 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < 5 0 < S.O < S.O < 5 0 < 5 0 < 5.0 < 5 0 Chloroform < 5,0 < 5 0 < S.O < S 0 < 5.0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5.0 < S.O < 5 0 < S 0 < 5 0 < 5 0 Toluene < 5,0 < 5.0 < S.O < 5 0 < 5 0 < 5.0 < 5 0 1,1,1-Trichloroethane m-Xylene < 5 0 < 5 0 < 5.0 < S.O < 5,0 < 5 0 < 5 0 1,1,1-Trichloroethane m-Xylene < 5 0 < 5.0 < 5 0 < S.O < S 0 < 5 0 < 5 0 o,p-Xylene < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5.0 < S 0 Xylenes,Total • • * • • * * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < Naphthalene < ACID COMPOUNDS (ug/l) 5 0 5 0 5 0 5 0 5 0 5.0 5 0 5 0 S 0 S 0 5 0 5 0 5 0 5 0 o-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < S 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 55.0 < 10 0 < 10 0 < 10 0 < 10 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < 5 0 < 5 0 < S 0 < 5,0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10,0 < 10 0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate 13 0 < 5 0 < 5 0 < S 0 19.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 52.0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5.0 < 5 0 < 5,0 < 5 0 < 5 0 2-Hexanone < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 Indene < 5 0 < 5 0 < 5 0 •> < 5,0 < 5.0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 1-MethyInaphthatene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 C < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 4 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-4 S-4 S-4 S-4 S-4 S-4 S-4 DATE SAMPLED 5-2-86 11-3-86 4-27-87 10-28-87 4-27-88 11-2-88 5- 1 •89 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5,0 < 5 0 Chloroform < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10.0 < 10.0 < 10.0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 Toluene < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 m-Xylene < 5 0 < 55.0 < 5.0 < 5 0 < 5 0 • * o,p-Xylene < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 * * Xylenes,Total * • • • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < S 0 < 5 0 Naphthalene < 5 0 < 5 0 < 5.0 < 5,0 < S.O < 5,0 < 5.0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 Phenol < 5,0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5,0 < 5.0 < S.O < 5 0 < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10.0 < 25 0 < 25 0 < 25.0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < 5.0 < 5.0 < 5 0 < S.O < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 • • * • * Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10.0 < 25.0 < 25.0 < 25,0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10.0 < 25.0 < 25.0 < 25.0 < 25 0 2,4-Oimethylphenol < 5 0 < 5.0 < 5,0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5,0 < 5 0 < S.O < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 i) < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Methyl mercaptan < 20.0 < 20.0 < 20 0 < 20 0 < 20.0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pent achIorophenoI < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 <- Parameter value is less than given detection limits * Parameter was not analyzed TABLE 4 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-4 S-4 S-4 DATE SAMPLED 10-31 -89 4-26-90 10-29-90 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5.0 < 5.0 Chloroform < 5.0 < 5.0 8.3 Cyclohexane (2) < 10 0 * * Ethylbenzene < 5 0 < 5.0 < S 0 Toluene < 5 0 < S 0 < 5 0 1,1,1-Trichloroethane < 5.0 < 5 0 < 5.0 ai-Xylene • * • o,p-Xylene * • • Xylenes,Total < 5 0 < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < S.O < 5.0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5 0 m+p-Cresol < 5 0 < 5.0 < 5 0 Phenol < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5.0 < S 0 Acetone < 10 0 < 10.0 < 10 0 Acetonitrile (1) < 100 0 * * Am line < 5.0 < 5 0 < 5 0 Benzenethiol (4) * • • Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10.0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 DI-n-octylphthalate < 5 0 < 5.0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 0 < 5 0 < S 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 • • 1-Methylnaphthalene (3) < 5 0 • * 2-Methylnaphthalene < 5 0 < 5.0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 10 0 PentachIorophenoI < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrum onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrLRi, quantitation is an estimate, but IS within 10% of the true value (4) Not consistently recovered using metho 8240/8270. < Parameter value is less than given detection limits ' Parameter was not analyzed TABLE 5 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-5 7-11-84 MAJOR IONS (mg/l except as noted) Calciun (Ca) Magnesiun (Mg) Sodiun (Na) Potassiun (K) Bicarbonate (HC03) Carbonate (C03) < Hydroxide (OH) Chloride (CI) Fluoride (F) Sulfate (S04) MINOR IONS (mg/l) Nitrate+Nitrite (as N) < Organic Nitrogen (as N) Annonia (as N) Sulfide < Total Cyanide < 166 43. 417 27. 318 3 0 0 0 0 2 0 .0 660.0 2 30 268.0 .1 .1 .7 .05 .01 FIELD MEASUREMENTS Field pH 6 86 Sp. Conductance (udios/cm) 3200.0 S-5 8-15-84 S-5 9-14-84 S-5 10-16-84 S-5 1-30-85 S-5 4-30-85 149.0 50.0 398.0 41.0 318.2 3 0 .0 710 0 2.00 274.0 .1 1.7 .5 .05 .01 6.96 3700.0 168.0 57.0 420.0 48.0 404.8 3.0 .0 730.0 2.10 296.0 .3 2.6 .7 .05 .01 6.86 3200 0 178 71 450 63, 431. 3 0 0 0 ,0 .6 0 .0 733 0 2 80 286 0 .4 .4 .7 .05 .01 7.07 3200 0 157.0 61,0 386 0 36 0 679.1 3 0 .0 580 0 2 10 280 0 .1 .1 .7 05 01 7.18 3400 0 160 56 420 36 275 9 0 0 0 0 6 6 ,0 1200 0 2.30 570,0 1 ,1 ,7 03 .01 7 03 3200 0 S 5 11- 1-85 169. 87 500 58 482. 3 .0 0 0 0 .8 0 .0 940.0 2 40 320.0 .1 1.7 9 05 01 6 94 OTHER PARAMETERS Lab pH (units) 7.34 7 19 7.01 Lab Conductivity (unhos/cm) 3160 0 3210.0 3340,0 Total Suspended Solids(mg/l) 6 0 3.0 8 0 Total Dissolved Sol{ds(mg/l) 1950.0 2030.0 2080.0 Oil & Grease (mg/l) < 10 < 1.0 < 1.0 Total Organic Carbon (mg/l) 8.0 12.0 13.0 Total Organic Halogen ugCl/l 82 0 45.0 160.0 ALKALINITIES as mg/l CaC03 6 90 3550 0 < 4 2070 < 1 8 160 7 10 3300 0 7 0 2080.0 < 1 0 4.6 35 0 7.16 3200 0 3 0 2120.0 < 1 0 4.3 25 0 7.25 3740 0 6 0 2490.0 1.0 8 7 72 0 Total Alkalinity 261 0 261 0 332,0 354.0 557 0 242 0 396 0 Bicarbonate Alkalinity 261.0 261.0 332.0 354.0 557 0 226 0 396,0 Carbonate Alkalinity < 5.0 < 5.0 < 5,0 < 5.0 < 5 0 16 0 < 5,0 :E METALS (mg/l) .06^ -Z / Arsenic (As) 004 .060 .035 .06^ .071 074 .130 Barium (Ba) .063 .066 .070 .074 ,054 .057 078 Cadmiun (Cd) < .002 < .002 < 002 < .002 < 009 < .009 < 004 Chroffliun Hex (Cr+6) < 010 < .010 < .010 < .010 < 010 < olO < .010 Total Chromium (Cr) < .005 < .005 < .005 < .005 < .005 < 005 < .005 Lead (Pb) < .025 < .025 < 025 < 025 < .030 < .030 < 025 Manganese (Mn) .033 .210 .200 020 .200 033 .270 Mercury (Hg) < .0003 < .0002 < 0002 < 0002 < ,0002 < 0002 < 0001 Nickel (Ni) < .010 < 010 < .010 < .010 010 < .006 < 010 Seleniun (Se) < 020 < .020 < .020 < 030 < 004 < 004 < 004 SIIverCAg) < .003 < .003 < .003 < .005 < 003 < .003 < 003 Vanadium (V) < .002 .004 .003 .004 < 005 < .005 < 002 Zinc (Zn) < .004 .037 < .004 .013 < ,004 .014 < .004 Parameter value is less than given detection limits Parameter was not analyzed TABLE 5 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-5 DATE SAMPLED 4-29-86 S-5 10-27-86 S-5 4-23-87 S-5 10-26-87 S-5 4-28-88 S-5 10-28-88 S- 5- 5 3-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) 164 0 240.0 180.0 174 0 248 0 166 0 243 0 Magnesiun (Mg) 82.0 95.0 77.0 56.0 91.0 57.0 99 0 Sodium (Na) 404.0 500.0 453.0 423.0 516 0 389 0 485 0 Potassim (K) 70.0 66 0 58 0 45.0 47.0 41 0 53 0 Bicarbonate (HC03) 570.6 423 1 423.1 451 1 531.6 397 5 434 1 Carbonate (C03) < 3 0 < 3 0 < 3 0 < 3 0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 0 Chloride (CI) 632 0 1080 0 788 0 724 0 1040 0 763 0 928 0 Fluoride (F) 3.10 2 30 2 SO 2.10 1.70 1 50 2 90 Sulfate (S04) 316.0 462.0 279.0 293.0 533 0 282 0 446 0 MINOR IONS (RQ/l) Nitrate+Nitrite (as N) < .2 < .1 < .1 < .1 < 2.0 < 1 < 1 Organic Nitrogen (as N) 1.2 .1 .3 < .1 < .2 .2 5 Annonia (as N) .4 .9 .6 .9 .7 .7 1 4 Sulfide < .05 < .05 < .J5 < .05 < .05 .05 < 05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 27 6 89 7 02 7.25 7.27 7.16 7 59 Sp Conductance (unhos/cm) 3300 0 4000.0 3450.0 3300.0 3800.0 3200 0 4000 0 OTHER PARAMETERS Lab pH (units) 7.79 7.08 7 90 7.31 7.60 7 60 7 80 Lab Conductivity (unhos/cm) 3530.0 4250.0 3620.0 3330 0 4250.0 2940 0 4320 0 Total Suspended Solids(mg/l}< 10 0 < 5 0 < 2.0 < 2.0 4 0 7 0 < 6 0 Total Dissolved Solids(mg/l) 2020 0 2740 0 3160.0 2040 0 2410.0 1960 0 2700 0 Oil t Grease (mg/l) < .5 < .5 < 1.0 1 0 < 1.0 1 0 21 0 Total Organic Carbon (mg/l) 18 0 6 8 6.4 6 2 4.7 3 8 6 0 Total Organic Halogen ugCl/l 130 0 51 0 40.0 41 0 21 0 34 0 47 0 ALKALINITIES as tt^/l CaC03 Total Alkalinity 468 0 347.0 347.0 370 0 436 0 326 0 356 0 Bicarbonate Alkalinity 468 0 347.0 347 0 370 0 436 0 326 0 356 0 Carbonate Alkalinity < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 TRACE METALS (mg/l) / .0^ Arsenic (As) 140 .110 .0^ < 030 .011 023 Barium (Ba) 073 .083 .067 .062 .089 .071 092 Cadmiun (Cd) < .004 < .004 < .005 < 005 < .005 < .005 < 005 Chromiun Hex (Cr+6) < .010 < 010 < 100 < 010 < .010 030 < 010 Total Chromiun (Cr) < .005 < .005 < .005 < .010 < .010 < 010 < 010 Lead (Pb) < .020 < .020 < .002 < .002 < .002 < .002 < 002 Manganese (Mn) 150 .280 .180 190 .280 .180 .260 Mercury (Hg) < .0001 < 0001 < 0001 < 0001 < 0001 < .0001 < 0001 Nickel (NO < .010 < .010 < .040 < .040 < .040 < .040 < 040 Selenium (Se) < .040 < .020 .080 < .004 < .020 < 004 < 040 Silver(Ag) < .003 < .003 < .005 < .005 < .005 < .005 < 005 Vanadiun (V) .009 002 < .010 < .010 < .010 < .010 < 010 Zinc (Zn) .006 .005 < .010 .010 .010 < .010 < 010 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 5 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-5 10-26-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) Magnesium (Mg) Sodiun (Na) Potassiun (K) Bicarbonate (HC03) Carbonate (C03) < Hydroxide (OH) Chloride (Cl> Fluoride (F) Sulfate (S04) MINOR IONS (ng/l) Nitrate+Nitrite (as N) Organic Nitrogen (as N) Annonia (as N) Sulfide Total Cyanide 178 61 400 42 369 3 0 0 0 0 4 0 .0 758 0 1 50 316.0 .1 .6 1.1 .05 .01 FIELD MEASUREMENTS Field pH Sp Coixluctance (umhOS/cm) 7.17 3300.0 s-s 4-27-90 175.0 60.1 434.0 38.8 318 2 3.0 .0 801 0 1.40 298.0 .2 .6 .9 .05 .01 7.06 3300.0 OTHER PARAMETERS Lab pH (units) Lab Conductivity (unhos/cm) Total Suspended Solids(mg/l)< Total Dissolved Solids(mg/l) Oil & Grease (mg/l) Total Organic Carbon (mg/l) Total Organic Halogen ugCl/l< ALKALINITIES as mg/l CaC03 Total Alkalinity Bicarbonate Alkalinity Carbonate Alkalinity < TRACE METALS (mg/l) Arsenic (As) Banun (Ba) Cadmiun (Cd) < Chromium Hex (Cr+6) < Total Chromium (Cr) < Lead (Pb) < Manganese (Mn) Mercury (Hg) < Nickel (NO < Selenium (Se) < Silver(Ag) < Vanadiun (V) < Zinc (Zn) < Parameter value is less than given detection limits Parameter was not analyzed S-5 10-23-90 185 0 59.2 429 0 43 8 376 7 3 0 .0 810 0 1.40 334 0 .1 .7 .7 .05 .01 7 22 3000 0 7.80 7.30 7.30 3040 0 2860 0 3320 0 3.0 22.8 162 0 2100.0 2080 0 2060 0 1 0 < 1.0 < 1.0 3.9 3.8 3.3 150 0 < 30 0 51 4 303 0 261 0 309 0 303 0 261 0 309 0 5 0 < 5 0 < 5 0 .010 019 .010 .070 .063 074 005 < .005 < .005 .010 < 010 < .010 010 < 010 < .010 .010 < .010 < .010 .200 .160 < 010 0002 < .0002 < 0002 .040 < .040 < .040 010 < .010 < 010 010 < .010 < 010 010 < .010 < .010 .010 < .010 < .010 TABLE 5 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-5 S-5 S-5 S-5 S-5 S-5 S-5 DATE SAMPLED 7-11 -84 8-15-84 9-14-84 10-16-84 1-30-85 4-30-85 11-1-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Chloroform < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Toluene < 5 0 < S 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 m-Xylene < 5.0 < 5 0 < 5.0 < 5,0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Xylenes,Total • * • • • * « BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < S 0 < 5 0 < 5 0 < 5 0 < 5 0 Naphthalene < 5.0 < S.O < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5.0 < 5,0 < 5 0 < 5 0 < 5 0 «»+p-Cresol < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < S.O < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone 220 0 89 0 26.0 41 0 < 10,0 36 0 < 10 0 Acetonitn le < 100 0 < 100 0 < 100 0 < 100 0 < 100,0 < 100.0 < 100 0 Am line < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate 10 0 < 5 0 < 5 0 < 5 0 24.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 DI-n-octylphthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone ; < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pent ach I orofsheno I < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 5 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-5 4-29-86 S-5 10-27-86 S-5 4-23-87 S-5 10-26-87 S-5 4-28-88 S-5 10-28-88 S- 5 5 3-89 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < 5.0 < S.O < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10.0 < 10 0 < 10.0 < 10 0 < 10 0 Ethylbenzene < S 0 < S.O < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 Toluene < S 0 < S.O < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < S 0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m-Xylene < 5 0 < S.O < 5.0 < S.O < 5 0 * • o,p-Xylene < 5 0 < S.O < 5 0 < 5.0 < 5 0 • * Xylenes,Total • * * • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 10.0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 Naphthalene < 5.0 < 10.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 10.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 m+p-Cresol < 5,0 < 10.0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 10.0 < S.O < 5 0 < 5 0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 10.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10.0 < 50.0 < 25 0 < 25 0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100.0 < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5.0 < 10 0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10.0 < 20.0 * * • * * Bis(2-ethylhexyl)phthalate < 5 0 < 10.0 < 5 0 5 0 < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 50 0 < 50 0 < 25 0 < 25 0 < 25.0 < 25 0 Carbon Disulfide < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 2,4-Difflethylphenol < 5 0 < 10 0 < 10 0 < 5.0 < 5 0 < 5 0 < 5 0 Ol-n-octylphthalate < 5 0 < 10.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 5.0 < 10 0 < 10 0 < 10.0 < 10 0 Indene < 5 0 < 10 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 3-MethyIchoIanthrene < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 10.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 20 0 < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 PentachIorophenoI < 5.0 < 10.0 < 5.0 < 5 0 < 5 0 < 5,0 < 5 0 Ouinoline < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed I TABLE 5 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) S-5 10-26-89 S-5 4-27-90 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) . Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and oiay deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using aKtho 8240/8270 S-5 10-23-90 Benzene < 5.0 < 5.0 < 5.0 Chloroform < 5 0 < 5 0 < 5 0 Cyclohexane (2) < 10 0 * • Ethylbenzene < 5 0 < 5,0 < 5.0 Toluene < 5 0 < 5.0 < 5.0 1,1,1-Tr1chloroethane < 5 0 < 5.0 < 5 0 m-Xylene * • • o,p-Xylene • • • Xylenes,Total < 5 0 < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5.0 < S.O Naphthalene < 5 0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5 0 < 5 0 m+p-Cresol < 5.0 < 5 0 < 5 0 Phenol < 5 0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < S.O < 5 0 < 5 0 Acetone < 10 0 < 10 0 21 0 Acetonitrile (1) < 100 0 • • Am line < 5.0 < 5 0 < 5.0 Benzenethiol (4) * • • Bi8(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide 20 0 < 5 0 < 5 0 Oichloromethane < 5.0 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5.0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5.0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * * 1-Methylnaphthalene (3) < 5 0 • * 2-Methylnaphthalene < 5.0 < S 0 < 5,0 4-Methyl-2-pentanone < 10.0 < 10 0 < 10 0 PentachIorophenoI < 5.0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5.0 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 6 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-10 S-10 S-10 S-10 S-10 s-10 s-10 DATE SAMPLED 7-13-84 8-24-84 9-26-84 11-5-84 1-31-85 4-24-85 10-30-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) 80.0 95.0 74.0 71 0 65.0 77 0 86 0 Magnesiun (Mg) 31.0 27.0 29 0 29.0 29 0 30 0 28 0 Sodiun (Na) 467 0 426 0 449 0 448.0 400 0 440 0 468 0 Potassium (K) 22.0 40.0 23.0 22 0 17 0 19 0 24 0 Bicarbonate (HC03) 576 7 585.2 582 8 601.1 484.0 495 0 1261 9 Carbonate (C03) < 3 0 < 3.0 < 3 0 < 3 0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 0 Chloride (CI) 550.0 598 0 618 0 675 0 500 0 475 0 706 0 Fluoride (F) 5.70 4 40 6 00 5.40 4.50 4 80 4 30 Sulfate (S04) 60.0 103.0 57.0 73 0 110 0 130 0 67 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 1.9 < .1 < .1 < .1 < .1 < 1 Organic Nitrogen (as N) 7.0 13.0 7.0 9 6 13 0 ,3 20 0 Annonia (as N) 17 0 13 0 20 0 24 0 20 0 18 0 14 0 Sulfide 9.60 < .05 8 40 1.50 5 60 3 20 6 30 Total Cyanide < .01 < .01 < .01 < 01 < .01 < .01 < 01 FIELD MEASUREMENTS Field pH 7.36 7.47 7 62 7 41 7.79 7 64 7 65 Sp Conductance (unhos/cm) 2800.0 3200.0 2700 0 3200 0 3100 0 2800 0 * OTHER PARAMETERS Lab pH (units) 7.96 7.57 7 75 7.73 8.01 7 83 7 87 Lab Conductivity (unhos/cm) 2740.0 2960 0 3020 0 3130 0 2780 0 2650 0 2980 0 Total Suspended Solids(mg/l)< 2.0 6 0 < 2.0 < 2.0 6 0 < 2 0 < 2 0 Total Dissolved Solids(mg/l) 1570.0 1760 0 1620 0 1730 0 1570 0 1530 0 1720 0 Oil t Grease (mg/l) 3 0 3 0 4 0 2.0 2.0 3 0 6 0 Total Organic Carbon (mg/l) 27.0 30 0 42 0 28 0 19.0 19 0 30 0 Total Organic Halogen ugCl/l 45 0 92 0 64 0 69 0 150 0 160 0 16 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 473,0 480 0 478 0 493 0 397.0 406 0 549 0 Bicarbonate Alkalinity 473 0 480.0 478 0 493 0 397 0 406 0 1035 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) / / / Arsenic (As) .063 .028 .030 005 .056 .050 100 Barium (Ba) .130 .180 .140 .160 .140 ,140 170 Ca<lnium (Cd) < .002 .003 < 002 < .002 < 009 < 009 < 004 Chromiun Hex (Cr+6) < .010 < .010 < 010 < 010 < .010 < 010 < 010 Total Chromiun (Cr) .009 .009 .008 006 .006 .009 006 Lead (Pb) < .025 < .025 < 025 < .025 < 030 < .030 < 025 Manganese (Mn) .130 .220 140 .350 < .160 .150 160 Mercury (Hg) < 0003 < 0002 < 0002 < .0002 < 0002 < 0002 < 0001 Nickel (NO 013 .020 .020 .020 .020 020 023 Selenium (Se) < 020 < .020 < 020 < 003 < .010 < 010 < 020 Silver(Ag} < 003 < 003 < .003 < 005 < .003 < .003 005 Vanadiun (V) < 002 003 < 002 < 002 < .005 < 005 < 002 Zinc (Zn) < .004 .037 .011 < .004 < .004 < 004 < 004 Parameter value is less than given detection limits Parameter was not analyzed TABLE 6 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-10 s-10 s-10 S-10 s-10 s-to s-10 DATE SAMPLED 4-30-86 10-29-86 4-21-87 10-27-87 4-26-88 10-31-88 4-28-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) 59.0 67.0 64 0 59 0 58.0 56 0 55 0 Magnesiun (Mg) 27.0 29.0 29.0 26.0 27.0 27.0 26 0 Sodiun (Na) 475.0 510 0 500 0 476 0 497.0 475 0 420 0 Potassiun (K) 20 0 25 0 20 0 23 0 19 0 22 0 18 0 Bicarbonate (HC03) 643.8 705 9 680.3 714 5 668 1 784 0 508 4 Carbonate (C03) < 3.0 < 3.0 < 3 0 < 3.0 < 3.0 < 3 0 < 3,0 Hydroxide (OH) 0 .0 .0 .0 .0 .0 .0 Chloride (CI) 543.0 702.0 641 0 606 0 603.0 632 0 519 0 Fluoride (F) 3.60 4 40 4 10 4 40 3 90 3.40 3 80 Sulfate (S04) 40.0 63 0 58 0 56 0 54.0 49 0 110 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) .1 < .1 < .1 < 1 < 2 0 < .1 < 1 Organic Nitrogen (as N) .1 1.5 < .1 < 1 0 < .2 1 0 < 2 0 Amnmnia (as N) 26.5 30.0 25.0 28.0 27.0 29.0 21 0 Sulfide 7.00 7.40 13.00 1.00 7.10 4 70 2 50 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < 01 FIELD MEASUREMENTS Field pH 7.94 7.62 7.66 7.58 7 65 7 61 7 88 Sp Conductance (umhos/cm) 3000.0 3000 0 2700 0 3200 0 2600 0 3200 0 2600 0 OTHER PARAMETERS Lab pH (umts) 8.15 7.20 7.84 7.80 7.70 7.80 8 00 Lab Conductivity (unhos/cm) 3080.0 3060 0 3000 0 3130.0 2950.0 3000 0 2380.0 Total Suspended Solids(mg/l)< 10.0 < 5 0 2 0 < 3 0 < 2.0 < 2.0 < 2 0 Total Dissolved Solids(mg/l) 1580.0 1520.0 1670 0 1480 0 1610 0 1660 0 1420 0 Oil & Grease (mg/l) 1 0 8 2 0 < 1.0 2.0 < 1 0 2 0 Total Organic Carbon (mg/l) 48 0 23 0 21 0 23 0 19.0 20 0 15 0 Total Organic Halogen ugCl/l 65 0 154 0 140 0 88 0 140.0 36 0 48 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 528 0 579 0 558 0 586 0 548.0 643 0 417 0 Bicarbonate Alkalinity 528 0 579 0 558 0 586 0 548 0 643 0 417 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) y Arsenic (As) .040 037 .054 044 < .030 .045 040 Barium (Ba) 160 .190 190 170 .170 .180 150 Cadmiun (Cd) < .004 < .004 < 005 < .005 < 005 < .005 < 005 ChromiLm Hex (Cr+6) < .010 < 010 < 010 < 010 < 010 < .010 < 010 Total Chromiun (Cr) .006 .007 < .005 < .010 < .010 < 010 < 010 Lead (Pb) < 020 < .020 < 002 < 002 < .002 < .004 < 002 Manganese (Mn) .120 .130 .120 120 096 .100 079 Mercury (Hg) < 0001 < .0001 < .0001 < .0001 < .0001 < 0001 < 0001 Nickel (NO .020 .020 < ,040 < .040 < 040 < 040 < 040 Selenium (Se) < 020 < .020 < 040 < .040 < ,040 < .002 < 004 SiIver(Ag) .004 < .003 < ,005 < .005 < .005 < 005 < 005 Vanadium (V) .003 .002 < .010 < .010 < 010 < .010 < 010 Zinc (Zn) .006 .004 < .010 < .010 < .010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 6 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-10 10-27-89 S-10 4-24-90 S-10 10-24-90 MAJOR IONS (mg/l except as noted) Calcium (Ca) 53.0 50.0 48.6 Magnesium (Mg) 25.0 23.4 23 2 SodiLin (Na) 416.0 430.0 398 0 Potassiun (K) 20.0 18 0 18 7 Bicarbonate (HC03) 626.7 645.0 620 6 Carbonate (C03) < 3.0 < 3.0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (CI) 492.0 481 0 518 0 Fluoride (F) 3.80 4.00 3.60 Sulfate (S04) 60 0 34.5 63.3 MINOR IONS (n^/l) Nitrate+Nitrite (as N) < .1 < .1 < 1 Organic Nitrogen (as N) 14 0 9.6 < 5.0 Ammonia (as N) 27.0 20.6 25 9 Sulfide 18,00 7.40 6 40 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 55 7 92 7 84 Sp Conductance (unhos/cm) 2300,0 2800.0 2400.3 OTHER PARAMETERS Lab pH (units) 7 70 7.90 7.80 Lab Conductivity (unhos/cm) 2350.0 2300 0 2540 0 Total Suspended Solids(mg/l)< 3 0 < 2 0 < 2 0 Total Dissolved Solids(mg/l) 1480 0 1390.0 1440 0 Oil & Crease (mg/l) 3.0 2.6 2.0 Total Organic Carbon (mg/l) 17 0 17 1 17 0 Total Organic Halogen ugCl/l 130 0 115.0 60 4 ALKALINITIES as mg/l CaC03 Total Alkalinity 514,0 529.0 509 0 Bicarbonate Alkalinity 514.0 529 0 509 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 TRACE METALS (mg/l) y Arsenic (As) .070 .063 061 Barium (Ba) .150 .130 .140 Cadmiun (Cd) < .005 < .005 < 005 Chromiun Hex (Cr+6) < 010 < 010 < 010 Total Chromiun (Cr) < .010 < .010 < .010 Lead (Pb) < .010 < .005 .009 Manganese (Mn) .090 .071 .072 Mercury (Hg) < .0002 < .0002 < .0002 Nickel (NO < 040 < .040 < 040 Selenium (Se) < .010 < 010 < .010 Silver(Ag) < 010 < 010 < .010 Vanadiun (V) < .010 < 010 < 010 Zinc (Zn) < .010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 6 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-10 7-13-84 S-10 8-24-84 S-10 9-26-84 S-10 11- 5-84 S-10 1-31-85 S-10 4-24-85 S-10 10 30-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene Chloroform Cyclohexane Ethylbenzene Toluene 1,1,1-Trichloroethane m-Xylene o,p-Xylene Xylenes,Total BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene Naphth.itene ACID COMPOUNDS (ug/l) 0- Cresol m+p-Cresol Phenol OTHER DETECTED ORGANICS (ug/l) Acenaphthene Acetone Acetonitn le Aniline Benzenethiol (4) Bis(2-ethylhexyl)phthalate 2-Butanone Carbon Disulfide Oichloromethane 2,4-Dimethylphenol Di-n-octylphthalate 2- Hexanone Indene 3- Methylcholanthrene Methyl mercaptan 1- Methylnaphthalene 2- Methylnaphthalene 4- M«. ,yl-2-pentanone Pentachlorophenol Ouinoline 7 0 < 5 0 19 0 16 0 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 5 0 < 5 0 < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 < S.O < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 • * * • • * * < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 59 0 < 10 0 27,0 < 10 0 < 10 0 170 0 < 10 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 5,0 < 5,0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 64.0 100 0 140 0 560 0 230.0 36 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 5,0 < 5 0 < 5 0 < 5 0 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 6 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-10 S-10 S-10 S-10 S-10 S-10 S-10 DATE SAMPLED 4-30-86 10-29-86 4-21-87 10-27-87 4-26-88 10-31 -88 4-28-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene 19.0 23.0 38.0 44.0 26 0 27.0 5 3 Chloroform < 5.0 < 5.0 < 5.0 < 10 0 < 5.0 < 5.0 < 5.0 Cyclohexane < 10.0 < 10.0 < 10.0 < 20.0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5 0 < 5 0 < 10.0 < 5 0 < 5 0 < 5 0 Toluene < 5.0 < 5.0 < 5 0 < 10 0 < 5.0 < 5.0 < 5 0 1,1,1-Trichtoroethane < 5.0 < 5.0 < 5.0 < 10.0 < 5.0 < 5.0 < 5 0 n-Xylene < 5.0 < 5.0 < 5 0 < 10.0 < 5.0 • * o,p-Xylene < 5.0 < 5 0 < 5 0 < 10 0 < 5 0 • • Xylenes,Total • « • • • < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5.0 < 35 0 < 20 0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5.0 < 35.0 < 20.0 < S.O < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5 0 < 35 0 < 20 0 < 5 0 < 5 0 m+p-Cresol < 5.0 < 5.0 < 5.0 < 35.0 < 20 0 < 5.0 < 5 0 Phenol < 5 0 < 5.0 < 5.0 < 35.0 < 20.0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < 5.0 < 35.0 < 20.0 < 5.0 < 5 0 Acetone < 10 0 < 10.0 180 0 < 50 0 < 25 0 < 25.0 < 25 0 Acetonitrile < 100 0 < 100.0 < 100 0 < 200 0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < S.O < 5.0 < 35.0 < 20.0 < 5.0 < 5 0 Benzenethiol (4) < 10.0 < 10 0 • * * 30.0 22 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5.0 < 5 0 < 35.0 7 8 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 50 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 10 0 < 5 0 5.0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 50.0 < 25 0 < 25.0 < 25 0 2,4-Diinethylphenol < 5 0 < 5.0 < 5 0 < 35 0 < 20 0 < 5 0 < 5 0 Oi-n-octylphthalate < 5 0 < 5 0 < 5.0 < 35.0 < 20 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10.0 < 10.0 < 20.0 < 10 0 < 10.0 < 10 0 Indene < 5.0 < 5.0 < 5.0 < 35.0 < 20 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5.0 < 5.0 < 35 0 < 20.0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-MethylnaphthaIene < 5 0 < 5 0 < 5.0 < 35 0 < 20 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5.0 < 35.0 < 20 0 < 5.0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 20.0 < 10 0 < 10 0 < 10 0 Pentach lorojshenol < 5 0 < 5.0 < 5 0 < 35 0 < 20 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5.0 < 5.0 < 35 0 < 20.0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 6 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-10 s-10 S-10 DATE SAMPLED 10-27-89 4-24-90 10-24-90 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene < 5 0 6.3 < 5 0 Chloroform < 5.0 < 5 0 < S 0 Cyclohexane (2) < 10 0 • • Ethylbenzene < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5.0 < 5 0 m-Xylene • * * o,p-Xylene * • • Xylenes,Total < 5.0 6 6 6 2 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracne < 5.0 < 5 0 < 5 0 Naphthalene < S.O < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5.0 Phenol < 5 0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5.0 < 5 0 Acetone < 10 0 < 10 0 < 10 0 Acetonitrile (1) < 100 0 • * Aniline < 5.0 < 5 0 < 5 0 Benzenethiol (4) • 52 0 28 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < ' 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * * 1-Methylnaphthalene (3) < 5 0 • * 2-Met*>ylnaphthalene < 5 0 < 5 0 < 5 0 4-Meiiiyl-2-pentanone < iO 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5.0 < 5 0 Ouinoline < 5 0 < 5.0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration. (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270, < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 7 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-11 S-11 s-11 / s-11^^ S-11 s-11 s-11 DATE SAMPLED 7-13-84 8-24-84 9-25-84 10-25-84 1-31-85 4-24-85 10-31-85 MAJOR IONS (mg/l except as noted) Calcium (Ca) 54.0 47,0 53.0 64.0 58.0 62 0 78 0 Magnesiun (Mg) 27.0 22.0 26.0 35.0 44.0 38 0 38.0 Sodium (Na) 458 0 405.0 397.0 620.0 936.0 840.0 594 0 Potassiun (K) 34.0 34 0 34.0 41.0 59 0 54 0 40 0 Bicarbonate (HC03) 612.1 607.2 625.5 693 8 585.2 687.7 720 6 Carbonate (C03) < 3.0 < 3.0 < 3.0 < 3 0 < 3.0 < 3.0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 0 Chloride (CI) 460.0 470.0 498 0 890.0 1430.0 943 0 826 0 Fluoride (F) 3.50 3.30 3,80 3.00 2.50 3.20 3.40 Sulfate (S04) 74.0 83.0 70.0 108.0 190.0 126.0 80.0 MINOR IONS (mg/t) Nitrate+Nitrite (as N> < .1 < .1 < .1 < .1 < .1 < .1 < 1 Organic Nitrogen (as N) 5 0 5.0 4 0 < .1 < .1 2.0 S.O Ammonia (as N) 16 0 21.0 21 0 22 0 14 0 12.0 22 0 Sulfide 6.40 < .05 6 10 8 40 5.20 10 00 5 00 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 62 7.62 7.68 7.67 7.86 7.89 7 73 Sp Conductance (unhos/cm) 2600.0 3200.0 2750 0 4600 0 1400.0 5450 0 • OTHER PARAMETERS Lab pH (units) 8 08 8.07 7.90 7.89 8 04 7.95 8 10 Lab Conductivity (unhos/cm) 2620.0 2570 0 2620 0 3970.0 5600.0 4400.0 3260 0 Total Suspended Solids(mg/l)< 2.0 3.0 < 2.0 < 4.0 6.0 4 0 < 2.0 Total Dissolved Solids(mg/l) 1480.0 1500.0 1420 0 2200 0 3320.0 2480 0 1900 0 Oil & Grease (mg/l) 3 0 5.0 6 0 1.0 2.0 1,0 5.4 Total Organic Carbon (mg/l) 20.0 24 0 54 0 20.0 18.0 17 0 21 0 Total Organic Halogen ugCl/l 69.0 130 0 82.0 70.0 110.0 46 0 42 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 502.0 498 0 513 0 569.0 480.0 564 0 591 0 Bicarbonate Alkalinity 502 0 498 0 513 0 569 0 480.0 564 0 591 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) y J / y / Arsenic (As) .084 .036 .021 .051 060 ,074 .060 Banun (Ba) 120 .110 .120 .150 .071 077 190 Cadmiun (Cd) < .002 < .002 < .002 < .002 < .018 < .018 < 008 Chromiun Hex (Cr+6) < .010 < .010 < 010 < .010 < 010 < 010 < 010 Total Chromium (Cr) .013 .012 .011 .007 < .010 .014 < 010 Lead (Pb) < 025 < .025 < .025 < .025 < .060 < 060 < .050 Manganese (Mn) 140 .130 .130 130 .087 110 130 Mercury (Hg) < 0003 < 0002 < 0002 < .0002 < 0002 < 0002 < 0001 Nickel (NO .025 .020 .030 .024 .020 .020 020 Selenium (Se) < .020 < .020 < 020 < .030 010 < .010 < .020 Silver(Ag) < .003 < .003 < .003 < .005 < 006 < 006 < 006 Vanadiun (V) .004 .005 .002 < .002 < 010 < .010 < 004 Zinc (Zn) < .004 .030 .015 < .004 < .008 .006 024 < Parameter value is less than given detection limits *- Parameter was not analyzed TABLE 7 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-11 4-30-86 S-11 10-29-86 87 S-11 10-27-87 S-11 4-26-88 S-11 10-31-88 MAJOR IONS (mg/l except as noted) Calcium (Ca) 56.0 65.0 62.0 45.0 56,0 Magnesiun (Mg) 40 0 49.0 48.0 29.0 39.0 Sodiun (Na) 929 0 1340.0 1200 0 432 0 765.0 Potassiun (K) 64.0 92.0 80 0 38.0 52 0 Bicarbonate (HC03) 704 7 774.2 768 1 813.2 701.1 Carbonate (C03) < 30 < 3.0 < 30 < 30 < 30 Hydroxide (OH) .0 .0 .0 .0 .0 Chloride (CI) 1370.0 1890.0 1850.0 492.0 1090 0 Fluoride (F) 2.40 2.40 2 50 2.60 2.60 Sulfate (S04) 13.0 162.0 133 0 43.0 126 0 42 28 396 34 862. 3 0 0 0 0 .0 0 0 434 0 2 30 48 0 S-11 4-27-89 0 0 0 ,0 .5 0 .0 806 0 3 00 79 0 66 40 618 37 731 3 MINOR IONS (mg/l) Nitrate+Nitrite (as N) Organic Nitrogen (as N) Annonia (aa N) Sulfide Total Cyanide 1 .1 17.6 5.70 .01 .1 1 8 15.0 7.80 .01 .1 8.6 6 « 6.00 .01 .1 2.0 25.0 6 40 .01 2 0 .2 20.0 6.70 .01 .1 1 0 24.0 2 70 01 .1 2 0 19.0 7 80 01 FIELD MEASUREMENTS Field pH 8 01 7.75 Sp Conductance (unhos/cm) 5500 0 8200.0 OTHER PARAMETERS Lab pH (units) 8 21 7.93 Lab Conductivity (unhos/cm) 5580.0 7330.0 Total Suspended Solids(mg/l)< 10.0 7.0 Total Dissolved Solids(mg/l) 2900.0 3820 0 Oil t Grease (mg/l) < .5 < .5 Total Organic Carbon (mg/l) 24 0 15.0 Total Organic Halogen ugCl/l 61 0 135 0 ALKALINITIES as mg/l CaC03 7.73 6400 0 7.89 6000 0 < 2 3290 < 14. 66. 7.71 3000.0 7.85 2620.0 4.0 1560.0 < 1.0 18 0 SS.O 7.74 4000.0 8.10 4080.0 < 2 0 2390 0 1 0 17.0 110.0 7 69 2800 0 7 90 2260 0 < 2 1380 1 15 13 < Parameter value is less than given detection limits * Parameter was not analyzed 7.80 3250 0 7.90 3560 0 4 1960 2 14 65 Total Alkalinity 578 0 635 0 630 0 667.0 575 0 707 0 600 0 Bicarbonate Alkalinity 578 0 635 0 630.0 667.0 575 0 707 0 600 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 .E METALS (mg/l) y y 083 Arsenic (As) .047 .033 .066 .053 .040 083 068 Banun (Ba) .080 .087 .090 .180 130 180 .240 Cadmiun (Cd) < .004 < 008 < CIO < .005 < .005 < 005 < 005 Chromium Hex (Cr+6) < .010 < .010 < .010 < .020 < .010 < 010 < 010 Total Chromiun (Cr) < .005 < .010 < .010 < .010 < .010 < 010 < .010 Lead (Pb) < .020 < .040 < .002 < .002 < .002 < .004 < .002 Manganese (Mn) .094 079 080 .100 081 ,080 100 Mercury (Hg) < .0001 < .0001 < .0001 < .0001 < .0001 < ,0001 < 0001 Nickel (NO .020 .020 < .020 < .040 < .040 < .040 < .040 SeleniLin (Se) < 020 < .040 < .040 < .040 < 040 < 004 < 010 Silver(Ag) < .003 < .006 < .010 < 005 < .005 < .005 < 005 Vanadium (V) < .002 .004 < .020 < .010 < .010 < .010 < 010 Zinc (Zn) .013 .016 < .020 < .010 < .010 < .010 < 010 TABLE 7 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-11 DATE SAMPLED 10-30-89 S-11 4-24-90 S-11 10-24-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 51.0 54.8 57 6 Magnesiun (Mg) 29.0 39.3 35.5 Sodiun (Na) 418 0 878 0 371 0 Potassiun (K) 38 0 60 4 37.6 Bicarbonate (HC03) 713 3 747 4 690 1 Carbonate (C03) < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 Chloride (CI) 388 0 1170 0 487.0 Fluoride (F) 2.90 2 30 2 30 Sulfate (504) 56.0 96 0 41 8 MINOR IONS (n^/l) Nitrate+Nitrite (as N) < .1 < .1 < 1 Organic Nitrogen (as N) < 2 0 14 1 < 5.0 Annonia (as N) 26.0 16.4 29 4 Sulfide 9.01 6 80 9 70 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7.72 7.81 7 85 Sp Conductance (umhos/cm) 2800 0 5150.0 2400 0 OTHER PARAMETERS Lab pH (units) 8.10 8 00 7 90 Lab Conductivity (urhos/cm) 2170.0 4280.0 2610 0 Total Suspended Solids(mg/l)< 3.0 < 2.0 2 4 Total Dissolved Solids(nig/l) 1350.0 2580.0 1410.0 Oil & Grease (mg/l) 4 0 < 1 0 17.6 Total Organic Carbon (mg/l) 14.0 13.1 13 6 Total Organic Halogen ugCl/l 60.0 197.0 77.2 ALKALINITIES as mg/l CaC03 Total Alkalinity 585 0 613 0 566 0 Bicarbonate Alkalinity 585 0 613 0 566 0 Carbonate Alkalinity < 5.0 < 5.0 < 5.0 TRACE METALS (mg/l) y / y Arsenic (As) .110 .Ofif 062 Barium (Ba) .180 .210 .240 Cadmium (Cd) < .005 < .010 < 010 Chromiun Hex (Cr+6) < .010 < 010 < .010 Total Chromiun (Cr) < 010 < .020 < .010 Lead (Pb) < .005 < .010 009 Manganese (Mn) .080 .077 .086 Mercury (Hg) < 0002 < 0002 < 0002 Nickel (NO < .040 < 080 < 040 Selenium (Se) < 010 < .010 < .050 Silver(Ag) < .010 < .020 < .010 Vanadiun (V) < .010 < .020 < 010 Zinc (Zn) < 010 < .020 < 010 < Parameter value is less than given detection limits *. Parameter was not analyzed TABLE 7 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-11 7-13-84 S-11 8-24-84 S-11 9-25-84 S-11 10-25-84 S-11 1-31-85 S-11 4-24-85 S-11 10-31-85 ORGANIC COMPOUNDS- VOLATILES (ug/l) Benzene 6 0 < 5.0 7.0 6 0 < 5 0 < 5 0 < 5 0 Chloroform < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Toluene < 5.0 < 5.0 5.0 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5,0 m-Xylene < 5.0 < 5.0 < 5,0 < 5 0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5.0 Xylenes,Total * • • • • * * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 55 < 5.0 < 50 < 5.0 < SO < SO < 50 Naphthalene < 5 0 < SO < 5.0 < SO < 5.0 < 5 0 " < 5,0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5,0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Acetone 120 0 < 10 0 < 10.0 66.0 210.0 23 0 65.0 Acetonitrile < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) 170 0 800 0 270.0 130 0 93 0 40 0 26 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 130.0 58 0 33 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 20 0 Carbon Disulfide < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10.0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene 18 0 17 0 10 0 8 0 7 0 7 0 7 0 2-Methylnaphthalene < 0 < 5 0 < 5 0 < 5 0 < 5 J < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 7 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 7 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-11 S-11 S-11 S-11 S-11 S-11 S-11 DATE SAMPLED 4-30-86 10-29-86 4-21 -87 10-27-87 4-26-88 10-31 -88 4-27-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene 5.0 < 5.0 6 7 8 0 5 7 7 7 < 5 0 Chloroform < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10,0 < 10.0 < 10.0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5.0 < 5.0 < 10 0 < 10.0 < 10 0 < 5 0 Toluene < 5 0 < 5.0 5.2 < 10.0 < 10 0 < 10 0 < 5 0 1,1,1-Trichloroethane < 5.0 < 5 0 < 5 0 < 10.0 < 10 0 < 10 0 < 5 0 m-Xylene < 5.0 < 5.0 < 5 0 < 10 0 < 10,0 * • o,p-Xylene < 5 0 < 5 0 5 6 5.2 < 5 0 * * Xylenes,Total • * • • * < 10 0 5 1 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5 0 < 25.0 < 20 0 < 5.0 < 5 0 Naphthalene < 5 0 < 5.0 < 5 0 < 25.0 < 20.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) c-Cresol < 5.0 < 5.0 < 5 0 < 25 0 < 20 0 < 5 0 < 5 0 HV+p-Cresol < 5 0 < 5.0 < 5 0 < 25 0 < 20 0 < 5 0 < 5 0 Phenol < 5 0 < 5.0 < 5.0 < 25,0 < 20 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < 5.0 < 25 0 < 20 0 < 5 0 < 5 0 Acetone < 10 0 170.0 600.0 140 0 < 25 0 < 25 0 < 25 0 Acetonitn le < 100 0 < 100.0 < 100 0 < 100 0 < 100.0 < 100 0 < 100 0 Am line < 5 0 < 5 0 < 5 0 < 25 0 < 20.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10.0 63 0 56 0 * 74 0 48 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5.0 < 10 0 < 25,0 < 20 0 < 5 0 < 5 0 2-Butanone < 10 0 < 50 0 < 5 0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 * < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25.0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 25 0 < 20.0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5.0 < 25 0 < 20 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10.0 < 10 0 < 10,0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 < 25,0 < 20 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 25,0 < 20 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20.0 < 20 0 51 0 1-Methylnaphthalene 7.0 7.0 < 5 0 < 25 0 < 20.0 < 5 0 < 5 0 2-Mc.VInaphthaIene < 5.0 < 5.0 < 5 0 < 25.0 < 20 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 -< 5 0 < 25 0 < 20 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 25 0 < 20.0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 7 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-11 S-11 S-11 DATE SAMPLED 10-30-89 4-24-90 10-24-90 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 7 3 11.0 Chloroform < 5.0 < 5.0 < 5 0 Cyclohexane (2) < 10.0 • • Ethylbenzene < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 1,1,1-Tnchloroethane < 5.0 < 5.0 < 5.0 m-Xylene • • * o,p-Xylene * • * Xylenes,Total < 5 0 6.6 9.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5.0 < 5 0 Naphthalene < 5.0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5.0 Acetone < 10 0 < 10 0 < 10 0 Acetonitrile (1) < 100.0 * * Aniline < 5 0 < 5 0 < 5 0 Benzenethiol (4) 15 0 54 0 13.0 Bis(2-ethylhexyl)phthalate < 5.0 < 5 0 23 0 2-Butanone < 10 0 < 10 0 < 10.0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane 8,9 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5.0 < 5 0 Ol-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10,0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 • * 1-Methylnaphthalene (3) < 5 0 • * 2-Methylnaphthalene < 5 0 < 5 u < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 Ouinoline < 5,0 < 5 0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) * Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed SAMPLE IDENTIFICATION DATE SAMPLED S-24 7-25-84 MAJOR IONS (mg/l except as noted) Calcium (Ca) Magnesium (Mg) Sodiun (Na) Potassium (K) Bicarbonate (HC03) Carbonate (C03) < Hydroxide (OH) Chloride (Cl> Fluoride (F) Sulfate (S04) 252 0 93.0 1410.0 103 0 413 3 3.0 .0 2600 0 1 90 494 0 TABLE 8 CHEVRON SEMI-ANNUAL SAMPLE DATA S-24 8-28-84 S-24 9-24-84 S-24 10-17-84 S-24 2- 4-85 S-24 4-26-85 258.0 89 0 1420.0 103 0 341.4 3 0 .0 2600 0 1.60 424 0 .0 0 0 0 ,1 0 .0 2550.0 2 00 440.0 250. 88 1400 100 401. 3 270 0 95.0 1600 0 107.0 419.4 3.0 .0 2600.0 1.90 484.0 0 0 0 0 8 0 .0 2580.0 1.70 550 0 306 111. 1640. 110 443. 3. 280.0 100 0 1600 0 99.0 320.7 3 0 0 2500 0 1 60 484.0 S-24 11- 6 85 0 0 0 0 7 0 0 2840 0 2.00 450 0 374 116 1710 112 437 3 MINOR IONS (mg/l) Nitrate+Nitrite (aa N) < Organic Nitrogen (as N) Annonia (as N) Sulfide < Total Cyanide < FIELD MEASUREMENTS Field pH 7.14 Sp Conductance (unhos/cm) 10000 0 .1 .5 2.8 .05 .01 .1 .3 2.9 .05 .01 7 24 9000 0 .1 .8 2 4 .05 .01 7.38 8400.0 .1 .3 2.7 .05 .01 7.37 11500 0 .1 .2 2 7 .05 .01 7.30 10500 0 1 1 0 2 6 .05 .01 7 42 9000 0 1 1 4 3 2 .05 01 7.08 OTHER PARAMETERS Lab pH (units) 7.29 7 41 7.85 7.20 7.56 Lab Conductivity (urfios/cm) 8990 0 8820.0 8820 0 9090.0 8550 0 Total Suspended Solids(mg/l)< 2.0 3.0 < 2 0 < 4.0 < 2.0 Total Dissolved Solids(mg/l) 4990 0 5330.0 5320 0 5560 0 5650.0 Oil & Grease (mg/l) 1.0 < 1.0 < 1.0 < 1.0 < 10 Total Organic Carbon (mg/l) 8.8 8.6 12.0 6.6 16 0 Total Organic Halogen ugCl/l 85 0 40 0 51 0 50 0 68 0 ALKALINITIES as mg/l CaC03 7 47 9110.0 4 0 5640 0 1 5 0 4 180 7 40 9690 0 < 2.0 6320 0 2 0 11 0 58 0 Total Alkalinity 339 0 280 0 329 0 344.0 364 0 263 0 359 0 Bicarbonate Alkalinity 339 0 280 0 329.0 344 0 364 0 263 0 359 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 :E METALS (mg/l) Arsenic (As) < .020 < .020 < .020 .020 .021 .011 < 040 Bariun (Ba) .070 .080 .050 .060 .031 < .050 ,060 Cadmiun (Cd) < .020 < 020 < .020 < .020 < 090 < 090 < 040 Chromium Hex (Cr+6) < .010 < .010 < .010 < 010 < .010 < 010 < 010 Total Chromiun (Cr) < .050 < .050 < .050 < .050 < 050 < .050 < 050 Lead (Pb) < .250 < .250 < .250 < .250 < .300 < 300 < 250 Manganese (Mn) 370 400 .310 .350 .310 .320 .450 Mercury (Hg) < .0003 < .0002 < .0002 < .0002 < .0002 < 0002 < 0001 Nickel (NO < .100 < .100 < 100 < 100 < .060 < 012 < 100 Seleniun (Se) < .020 < .020 < .020 < .030 < .004 Oil < 020 Silver(Ag) < .030 < .030 < 030 < 050 < .030 < 030 < 030 Vanadiun (V) < .020 < .020 < .020 < 020 < 015 < .050 < ,020 Zinc (Zn) < .040 < .040 < 040 < .040 < .040 < .040 < 040 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 8 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-24 S-24 S-24 S-24 S-24 S-24 S-24 DATE SAMPLED 5-5-86 10-27-86 4-22-87 10-28-87 5-2-88 11-1-88 5-3-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) 274.0 350.0 666 0 856 0 981.0 675 0 1230 0 Magnesium (Mg) 98 0 130 0 250.0 320 0 370 0 270 0 450 0 Sodiun (Na) 1630.0 1640.0 2350 0 3410.0 3960.0 3020 0 4990 0 Potassium (K) 104 0 120.0 140 0 180.0 190 0 160 0 220 0 Bicarbonate (HC03) 329 2 320 7 284 1 324 3 353.6 360 9 419 4 Carbonate (C03) < 3.0 < 3 0 < 3 0 < 3.0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (CI) 2880 0 3120.0 5270.0 6590 0 8180 0 6790.0 10500 0 Fluoride (F) 1.60 1.60 1.20 1.00 1.10 1.70 1 40 Sulfate (S04) 404.0 566.0 735.0 906.0 984 0 911.0 1370 0 MINOR IONS (ll«/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 < .1 < 2 0 < .1 < .1 Organic Nitrogen (as N) .1 < .1 .1 1.1 .4 < .5 4 Ammonia (as N) 2.8 3.3 4.5 4.3 4.7 6 1 5 5 Sulfide < .05 < .05 < .05 < .05 < .05 < .05 < 05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < 01 FIELD MEASUREMENTS Field pH 7 47 7 25 7 12 7 18 7 03 7 05 6 98 Sp Conductance (unhos/cm) 9600,0 10000.0 14500 0 22000 0 22500 0 22000 0 30000 0 OTHER PARAMETERS Lab pH (units) 7 72 8 25 7 46 7.39 7.30 7.50 6 80 Lab Conductivity (urhos/cm) 9460 0 10400 0 15600 0 1850 0 23300 0 18700 0 26400 0 Total Suspended Solids(mg/l)< 10 0 < 5 0 < 2.0 4 0 3.0 2 0 < 2 0 Total Dissolved Solids(ing/l) 5700 0 6560 0 10100 0 12800.0 14000.0 12100 0 18800 0 Oil A Grease (mg/l) < .5 < .5 < 1.0 < 1 0 < 1 0 1 0 3 0 Total Organic Carbon (mg/l) 5.0 3.5 5.5 5 2 9.0 3 6 5 9 Total Organic Halogen ugCl/l 39.0 64.0 180.0 58 0 330 0 748 0 331.0 ALKALINITIES as n^/l CaC03 Total Alkalinity 270 0 263 0 233 0 266.0 290.0 296 0 344 0 Bicarbonate Alkalinity 270 0 263 0 233 0 266.0 290.0 296 0 344 0 Carbonate Alkalinity < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < .002 010 010 < .003 .013 .014 046 Barium (Ba) .045 038 .080 .100 .110 .080 150 Cadmium (Cd) < .008 < 008 < .030 < .030 < .030 < .030 < 050 Chromium Hex (Cr+6) < 010 < 010 < .OIL < 010 . < 010 < .010 < 010 Total Chromiun (Cr) < .010 < 010 < 030 < .050 < .050 < .050 < 100 Lead (Pb) < 040 < 040 < .020 < .004 < .020 < 010 < 040 Manganese (Mn) 340 400 .770 1 100 1 200 .790 1 500 Mercury (Hg) < .0001 < 0002 < .0001 < .0001 < .0001 < 0001 < 0001 Nickel (NO < .020 < .020 < 200 < .200 < .200 < .200 < .400 Seleniun (Se) < .040 < .020 < .004 < 002 < 040 < 010 < 040 Silver(Ag) < 006 < .006 < 030 < .030 < .030 < 030 < 050 Vanadiun (V) < .004 < 004 < .050 < 050 < 050 < 050 < 100 Zinc (Zn) < .008 .012 < .050 < .050 < .050 < .050 < .100 Parameter value is less than given detection limits Parameter was not analyzed TABLE 8 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED S-24 10-31-89 S-24 4-23-90 S-24 10-26-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 860.0 835 0 731 0 Magnesiun (Mg) 300 0 310 0 271.0 sodiun (Na) 3470.0 3500.0 3050.0 potassiun (K) 170.0 171.0 157 0 Bicarbonate (HC03) 375.5 392.6 337 7 Carbonate (C03} < 3.0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (CO 6760 0 6700 0 6400.0 Fluoride (F) 2.50 2 90 1.80 sulfate (S04) 1150.0 1070 0 895.0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) .8 < .1 < .1 Organic Nitrogen (as N) 2 0 2.5 1.4 Annonia (as N) 3.0 4.6 4.5 sulfide < .05 < .05 < .05 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 16 7 19 7 08 Sp. Conductance (urhos/cm) 16000 0 19000 0 20000 0 OTHER PARAMETERS Lab pH (units) 7.20 7.20 7.40 Lab Conductivity (urhos/cm) 15600 0 17000 0 15800.0 Total Suspended Solids(mg/l) < 3 0 < 2 0 5.6 Total Dissolved Solids(mg/l) 13000 0 15000 0 12400.0 Oil & Grease (mg/l) 2 0 < 1 0 1.2 Total Organic Carbon (mg/l) 5 4 6 4 3 9 Total Organic Halogen ugCl/l 170 0 163 0 131.0 ALKALINITIES as mg/l CaC03 Total Alkalinity 308 0 322.0 277.0 Bicarbonate Alkalinity 308 0 322 0 277 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 TRACE METALS (mg/l) Arsenic (As) .013 < .025 < .050 Bariun (Ba) 080 < .100 .079 Cadmium (Cd) < .030 < .050 < .025 Chromiun Hex (Cr+6) < .010 < .010 < .010 Total Chromiun (Cr) < 050 < .100 < .050 Lead (Pb) < .050 < 025 < .100 Manganese (Mn) 880 .660 .580 Mercury (Hg) < .0002 < 0002 < .0002 Nickel (NO < 200 < .400 < .200 Selenium (Se) < .050 < 050 < .010 SIIver(Ag) < .050 < 100 < .050 Vanadiun (V) < .050 < .100 < 050 Zinc (Zn) < .050 < .100 < .050 Parameter value is less than given detection limits Parameter was not analyzed TABLE 8 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S •24 S-24 S-24 S-24 S-24 S-24 s 24 DATE SAMPLED 7-25-84 8-28-84 9-24-84 10-17-84 2-4-85 4-26-85 11-6-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < S 0 < 5 0 < 5 0 < S 0 < 5 0 < 5 0 Chloroform < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10 0 < 10 0 Ethylbenzene < S 0 < S 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-T n chloroethane < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 m-Xylene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Xylenes,Total * • * • • * * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5 0 < 5 0 < S.O < 5 0 < 5 0 Naphthalene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone 15000 0 < 10 0 21 0 15 0 < 10 0 17 0 < 10 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100,0 < 100 0 < 100 0 Am line < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5.0 64.0 97 0 58.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10.0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Oichloromethane < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 5.0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10 0 < 10 0 < 10 0 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < S 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 8 (CONTINUEO) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION s-24 s-24 S-24 s-24 S-24 S-24 S-24 DATE SAMPLED 5-5-86 10-27-86 4-22-87 10-28-87 5-2-88 11-1-88 5-3-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5.0 < 5 0 < 15.0 < 5 0 < 5 0 Chloroform < S.O < 5.0 < 5 0 < 5 0 < 15.0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10.0 < 10.0 < 10 0 < 30 0 < 10.0 < 10 0 Ethylbenzene < 5.0 < S.O < 5 0 < 5 0 < 15 0 < 5.0 < 5 0 Toluene < 5.0 < 5.0 < 5 0 < 5 0 < 15.0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5.0 < 5 0 < 5 0 < 15.0 < 5 0 < 5 0 m-Xylene < 5.0 < 5.0 < 5 0 < 5 0 < 15 0 • * o,p-Xylene < 5 0 < 5.0 < 5 0 < 5 0 < 15 0 * • Xylenes,Total • • • • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5.0 < 5,0 < 5.0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5,0 < 5 0 m+p-Cresol < 5 0 < S 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 160.0 190.0 < 25 0 < 75.0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 300 0 < 100 0 < 100 0 Aniline < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 • * • • * Bis(2-ethylhexyl)phthalate 310 0 < .5 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 2-Butanone < 10.0 < 50.0 < 10 0 < 25 0 < 75 0 < 25.0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 15,0 < 5 0 < 5 0 Oichloromethane < 10 0 < 20.0 < 10 0 < 25 0 < 75 0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Oi-n-octylphthalate < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 21 0 2-Hexanone < 10 0 < 10 0 < 10.0 < 10 0 < 30 0 < 10 0 < 10 0 Indene < 5.0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methy I-2-|,entanone < 10 0 < 10 0 < 10 0 < 10 0 < 30 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 8 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-24 S-24 S-24 DATE SAMPLED 10-31 -89 4-23-90 10-26-90 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5 0 Chloroform < 5 0 < 5 0 < 5 0 Cyclohexane (2) < 10.0 • * Ethylbenzene < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5 0 < 5 0 m-Xylene • * • o,p-Xylene • * • Xylenes,Total < 5,0 < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5.0 < 5 0 Naphthalene < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5,0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 < 10 0 Acetonitrile (1) < 100 0 * • Aniline < 5 0 < 5 0 < 5 0 Benzenethiol (4) * * • Bis(2-ethythexyl)phthalate < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10.0 Carbon Disulfide < 5 0 < 5.0 < 5 0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Dimethylphenol < 5.0 < 5 0 < 5 0 DI-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * • 1-Methylnaphthalene (3) < 5 0 * • 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within lOX of the true value (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 9 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-35 S-35 S-35 S-35 S-35 S-35 S 35 DATE SAMPLED 7-16-84 8-14-84 9-17-84 10-17-84 2-1-85 4-29-85 10-29-85 MAJOR IONS (mg/l except as noted) Calcium (Ca) 187.0 158.0 142.0 141 0 141.0 130.0 114 0 Magnesiun (Mg) 79 0 67 0 66.0 66.0 76 0 61 0 50 0 Sodium (Na) 233 0 207.0 209.0 200.0 180 0 210 0 164 0 Potassiun (K) 15 0 13 0 15.0 16 0 14.0 15 0 14 0 Bicarbonate (HC03) 471.8 446 2 420 6 392.6 407.2 404 8 403.6 Carbonate (C03) < S.O < 3.0 < 3.0 < 3 0 < 3.0 7 2 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (CI) 220 0 346 0 336.0 314.0 314.0 251 0 205 0 Fluoride (F) .14 .40 60 .58 .40 .60 50 Sulfate (S04) 206 0 350 0 248.0 256.0 280.0 270 0 218 0 MINOR IONS (n«/l) Nitrate+Nitnte (as N) 9 0 11.0 7 8 7.5 7.4 5 0 2 4 Organic Nitrogen (as N) • .1 .8 .1 .3 .4 .3 Annonia (as N) < 1 .2 < .1 < .1 .1 < .1 1 Sulfide < .05 < .05 < ,05 < .05 < .05 < 05 < 05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7.09 7.11 7 15 7.32 7 15 7 12 7 23 Sp Conductance (unhos/cm) 2500 0 2300 0 2400.0 2200.0 2400 0 2300.0 * OTHER PARAMETERS Lab pH (units) 7.39 7.22 7.31 7.13 7.32 7.20 7 80 Lab Conductivity (unhos/cm) 2390.0 2320.0 2170 0 2120.0 2120.0 1980,0 1490 0 Total Suspended Solids(mg/l)< 2 0 3 0 < 2 0 < 4 0 3.0 2 0 < 2 0 Total Dissolved Solids(mg/l) 1580 0 1550 0 1320 0 1300.0 1440.0 1310 0 980,0 Oil & Grease (mg/l) < 1 0 < 1 0 < 1.0 < 1.0 < 1.0 < 1.0 2 0 Total Organic Carbon (mg/l) 2.6 3 1 4.5 3 4 2.8 2 5 2.2 Total Organic Halogen ugCl/l 29.0 16 0 24 0 19.0 15.0 15 0 21 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 387 0 366 0 345 0 322 0 334 0 344 0 331 0 Bicarbonate Alkalinity 387 0 366 0 345 0 322 0 334 0 332 0 331 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 12 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .006 .003 005 .003 .006 005 004 Bariun (Ba) .040 .036 .031 .028 .032 .026 022 CadmiLin (Cd) < 002 < 002 < .002 < .002 < .009 < .009 < 004 Chromium Hex (Cr+6) < 010 < .010 < 010 < 010 < .010 < .010 < 010 Total Chromiun (Cr) .006 .007 < .005 < .005 < .005 < 005 < 005 Lead (Pb) < 025 < 025 < 025 < .025 < .030 < .030 < 025 Manganese (Mn) < 005 < 005 < .005 < 005 < 005 < .005 < 005 Mercury (Hg) < .0003 < 0002 < .0002 0003 < 0002 < 0002 < 0001 Nickel (Ni) < .010 < .010 < 010 < .010 < 006 < 006 < 010 Selenium (Se) < 020 .020 < .020 < .030 < 002 < 002 < 002 Silver(Ag) < .003 < 003 < .003 < .005 003 < .003 < 003 Vanadiun (V) .004 .004 .003 < .002 < .005 < .005 < .002 Zinc (Zn) 007 .036 < .004 < .004 < .004 < .004 .030 < Parameter value is less than given detection limits Parameter was not analyzed TABLE 9 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-35 DATE SAMPLED 5- 2-86 S-35 10-30-86 S-35 4-20-87 S-35 10-26-87 S-35 4-27-88 S-35 11- 2-88 S-35 5- 3-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) 106.0 120,0 114.0 101.0 114 0 108 0 122 0 Magnesiun (Hg) 54 0 55 0 57.0 46.0 54 0 53 0 58 0 Sodiun (Na) 197.0 170.0 173 0 148 0 170 0 173 0 186 0 Potassiun (K) 14 0 14.0 13.0 14 0 13 0 14 0 14 0 Bicarbonate (HC03) 469.4 309 7 431.6 438 9 415 8 442 6 415 8 Carbonate (C03) < 3 0 < 3.0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 .0 Chloride (CI) 195 0 292 0 229 0 165.0 234 0 275 0 272 0 Fluoride (F) .60 .40 .60 .50 .50 .50 .60 Sulfate (S04) 245.0 245 0 201.0 201 0 204.0 222 0 214 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) 5.6 3.8 4 6 2.9 10.0 3 9 4.4 Organic Nitrogen (as N) 1.0 < .1 .8 < .1 < 2 < 1 2 0 Amnonia (as N) < .1 < .1 < .1 < .1 < .1 < .1 < 1 Sulfide < .05 < .05 < 05 < .05 < .05 < 05 < OS Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 50 7.27 7 29 7.28 7 24 6 98 7.32 Sp Conductance (umhos/cm) 1800,0 1800 0 1800 0 1775 0 2000 0 2120 0 2200 0 OTHER PARAMETERS Lab pH (units) 7.54 7 54 7.31 7.51 7.60 7 30 7.50 Lab Conductivity (unhos/cm) 1830.0 1780 0 1760.0 1500.0 1640 0 2760 0 1760 0 Total Suspended Solids(mg/l)< 10.0 < 2 0 3.0 < 2 0 2.0 < 2 0 < 10 0 Total Dissolved Solids(mg/l) 1090.0 988.0 1060 0 910 0 1060.0 1110 0 1130 0 Oil & Grease (mg/l) < .5 < .5 < 1.0 < 1.0 < 1 0 < 1 0 1.0 Total Organic Carbon (mg/l) 6 3 1 5 1.6 1 4 2 3 1 2 1 5 Total Organic Halogen ugCl/l< 5 0 37.0 32 0 15.0 < 15 0 22 0 36 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 385 0 254 0 354.0 360 0 341 0 363 0 341 0 Bicarbonate Alkalinity 385 0 254 0 354 0 360 0 341.0 363 0 341 0 Carbonate Alkalinity < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 TRACE METALS (R«/l) Arsenic (As) .005 004 004 004 < 006 < 003 < 003 Banun (Ba) .026 023 .024 .027 .029 033 .032 Cadmium (Cd) < .004 < .004 .005 < .005 < .005 < 005 < 005 Chromiun Hex (Cr+6) < .010 < .010 < .010 < 010 < 010 < 010 < .010 Total Chromiun (Cr) < .005 < 005 < 005 < .010 < 010 < 010 < 010 Lead (Pb) < .020 < .020 < .002 < 002 < .002 < 004 < 002 Manganese (Mn) 008 < .005 < .010 < 005 < .005 < 005 .010 Mercury (Hg) < 0001 < .0001 < 0001 < 0001 < 0001 < 0001 0002 Nickel (NO < .010 < 010 < .040 < .040 < 040 < 040 < 040 Seleniun (Se) < 004 < .004 < .004 < 004 < 002 < 002 < 002 SiIver(Ag) 003 < .003 < .005 < .005 < 005 < 005 < 005 Vanadiun (V) .003 .004 < .010 < .010 < 010 < .010 < 010 Zinc (Zn) < .004 012 < .010 < .010 < .010 < .010 < .010 Parameter value is less than given detection limits Parameter was not analyzed SAMPLE IDENTIFICATION DATE SAMPLED S-35 10-26-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) Magnesiun (Mg) Sodium (Na) Potassiun (K) Bicarbonate (HC03) Carbonate (C03) < Hydroxide (OH) Chloride (CI) Fluoride (F) Sulfate (S04) MINOR IONS (mg/l) 97 48 183 14 356 3 0 0 0 0 0 0 .0 251.0 .60 177.0 TABLE 9 CHEVRON SEMI-ANNUAL SAMPLE DATA S-35 4-25-90 119.0 61.4 197.0 16.0 410 9 3 0 .0 285.0 .55 218 0 S-35 10-26-90 112.0 56.7 179 0 15.3 395 0 3.0 .0 252 0 .37 213 0 Nitrate+Nitrite (as N) 7.1 5.7 3.6 Organic Nitrogen (as N) < .5 < .5 < .5 Ammonia (as N) < .1 < .1 < .1 Sulfide < .05 < OS < .05 Total Cyanide .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7.31 Sp. Conductance (unhos/cm) 2000 0 OTHER PARAMETERS Lab pH (units) Lab Conductivity (unhos/cm) Total Suspended Solids(fflg/l)< Total Dissolved Solids(ms/l) Oil & Grease (mg/l) Total Organic Carbon (mg/l) Total Organic Halogen ugCl/l ALKALINITIES as mg/l CaC03 Total Alkalinity Bicarbonate Alkalinity Carbonate Alkalinity < TRACE METALS (mg/l) Arsenic (As) < Barium (Ba) Cadmiun (Cd) < Chromiun Hex (Cr+6) < Total Chromiun (Cr) < Lead (Pb) < Manganese (Mn) < Mercury (Hg) < Nickel (NO < Selenium (Se) < Silver(Ag) < Vanadiun (V) < Zinc (Zn) < 7 30 2000 0 7 26 1700 0 7.50 7.70 7.60 1540 0 1740.0 1620.0 3.0 < 2.0 < 2 0 1040 0 1230.0 1080.0 2 0 2.8 1.1 1 6 2.2 2.9 70.0 30.0 < 30.0 292.0 337 0 324 0 292.0 337 0 324 0 5 0 < 5 0 < 5.0 ,005 < .005 < .010 .040 .048 .045 005 < .005 < 005 010 < 020 < .010 010 < .010 < .010 005 < .010 < 010 010 < .010 < .010 .0002 < 0020 < 0020 040 < 040 < 040 .010 < 010 < .010 010 < .010 < 010 .010 < .100 < 010 .010 < .010 < .010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 9 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-35 S-35 S-35 S-35 S-35 S-35 S-35 DATE SAMPLED 7-16-84 8-14-84 9-17-84 10-17-84 2- 1 •85 4-29-85 10 29-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Chloroform < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5,0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 m-Xylene < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 o,p-Xylene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Xylenes,Total • • • * • • * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < 5 0 < 5 0 < 5 0 < S.O < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < S.O < 5.0 < 5.0 < 5 0 < 5 0 n>+p-Cresol < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5.0 < 5.0 < S.O < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5,0 < 5 0 Acetone < 10.0 57.0 < 10 0 24,0 < 10 0 17.0 < 10 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Aniline < 5.0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Bi8(2-ethylhexyl)phthalate 20 0 < 5 0 < 5 0 100,0 22 0 < 5 0 38 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 < S.O < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 1-MethyInaph thaiene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene » < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 9 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION S-35 S-35 S-35 S-35 S-35 S-35 S-35 DATE SAMPLED 5-2-86 10-30-86 4-20-87 10-26-87 4-27-88 11-2-88 5-3-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < S.O < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < S.O < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5.0 < S.O < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 n-Xylene < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 * * o,p-Xylene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 • • Xylenes,Total * • • • * < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 Naphthalene < 5.0 < 5 0 < S 0 < 5.0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < S 0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < S 0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10.0 880 0 < 25 0 < 25 0 < 25 0 < 25 0 Acetonitn le < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Aniline < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10.0 • • * • * Bis(2-ethylhexyl)phthalate < 5.0 < 5.0 < S.O < 5.0 7.8 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10.0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 69,0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 4-Methyl-2-pentanone < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 PentachIorophenoI < 5 0 < 5 0 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 9 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene Chloroform Cyclohexane (2) Ethylbenzene Toluene 1,1,1-Trichloroethane m-Xylene o,p-Xylene Xylenes,Total BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene Naphthalene ACID COMPOUNDS (ug/l) 0- Cresol m+p-Cresol Phenol OTHER DETECTED ORGANICS (ug/l) Acenaphthene Acetone Acetonitrile (1) Aniline Benzenethiol (4) Bis(2-ethylhexyl)phthalate 2-Butanone Carbon Disulfide Oichloromethane 2,4-Dimethylphenol Di-n-octylphthalate 2- Hexanone Indene 3- Hethylcholanthrene (2) Methyl mercaptan (2) 1- Methylnaphthalene (3) 2- Methylnaphthalene 4- Methyl-2^pentanone Pentach I orojsheno I Ouinoline S-35 S-35 S-35 10-26-89 4-25-90 10-26-90 < 5 0 < 5,0 < 5.0 < 5,0 < 5 0 < 5 0 < 10 0 • • < 5 0 < 5 0 < S 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < S.O * • * • • • < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 < S.O < 5 0 < S.O < 5.0 < 5,0 < S.O < 5.0 < S 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 10 0 < 10.0 < 10 0 < 100.0 • • < 5 0 < 5.0 < 5.0 • • * < S 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < .5 < 5 0 7 3 < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 10,0 < 10.0 < 10 0 < 5 0 < S.O < 5.0 < 5,0 < 5 0 < 5 0 < 20 0 • • < 5.0 • * < 5.0 < 5 0 < 5 0 < 10 0 < 10 0 < 10.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (1) . Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 10 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-1 DATE SAMPLED 7-23-84 D-1 8-27-84 0-1 9-25-84 0-1 10-25-84 D- 2- 1 5-85 D- 4- 1 25-85 D- 11- 1 4-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) 28 0 29.0 30 0 30 0 27.0 32 0 36 0 Magnesiun (Mg) 24.0 25.0 24.0 25.0 27.0 24 0 25 0 SodiLin (Na) 185 0 185 0 177.0 170 0 166.0 200 0 188.0 Potassiun (K) 51.0 49.0 48.0 44.0 42 0 46 0 48.0 Bicarbonate (HC03) 592.6 606.0 577.9 608.4 604 7 580.4 601 1 Carbonate (C03) < 3.0 < 3.0 < 3.0 < 3 0 < 3.0 13 8 < 3.0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (CI) 142 0 145.0 155.0 144.0 143.0 149.0 148.0 Fluoride (F) .80 .70 .90 1.00 .60 .80 .80 Sulfate (S04) < 5 0 13.0 10.0 5.0 < 10.0 < 5 0 < 10.0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) < .1 < .1 < .1 < .1 < .1 < .1 < 5 Organic Nitrogen (as N) < .1 14 0 5 0 < .1 < .1 < .1 2 2 VAnnonia (as N) 15 0 15.0 13.0 15.0 15.0 14 0 15 0 Sulfide < .05 < .05 < .05 < .05 < .05 .06 < .05 Total Cyanide < .01 < .01 < .01 < .01 < 01 < .01 < 01 FIELD MEASUREMENTS Field pH 7.37 7.36 7.51 7.49 7.39 7.58 7 46 Sp Conductance (unhos/cm) 1400.0 1600.0 1350.0 1450 0 1500.0 1400 0 • OTHER PARAMETERS Lab pH (units) 7.72 7.25 7 85 7.63 7.57 7.60 7 71 Lab Conductivity (urhos/cm) 1610 0 1400 0 1410 0 1410 0 1330 0 1410 0 1320 0 Total Suspended Solids(mg/l) 3 0 20 0 < 2 0 < 4 0 < 2 0 < 2 0 10 0 Total Dissolved Solids(mg/l) 715.0 795 0 690.0 795.0 855.0 815 0 760,0 Oil t Grease (mg/l) < 1 0 < 1 0 < 1 0 < 1.0 4 0 1.0 2 0 >^otal Organic Carbon (mg/l) 12 0 16 0 23 0 7 1 6 7 8 4 6 9 )^otal Organic Halogen ugCl/l 6 0 10 0 41 0 15.0 8 0 20 0 16 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 486 0 497.0 474.0 503 0 496 0 499 0 493 0 Bicarbonate Alkalinity 486 0 497 0 474.0 499.0 496 0 476 0 493 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 23 0 < 5.0 TRACE METALS (mg/l) Arsenic (As) .006 .005 .003 .003 003 .003 .005 Bariun (Ba) .170 .120 190 .150 .180 200 150 Cadmiun (Cd) < .002 < .002 < 002 < .002 < 009 < .009 < 004 Chromium Hex (Cr+6) < .010 < .010 < .010 < .010 < 010 < .010 < 010 Total Chromium (Cr) < 005 < 005 < .005 < 005 < 005 < 005 < ,005 Lead (Pb) < .025 < .025 < .025 < .025 < 030 < .030 < .025 Manganese (Mn) .110 .120 .120 .120 130 130 120 Mercury (Hg) < .0003 < .0002 < .0002 < .0002 < .0002 < 0002 < ooor Nickel (NO < .010 .010 < .010 < .010 < 006 < 006 < 010 Selenium (Se) .003 < .020 < .004 < 030 < 002 < 002 < 002 Silver(Ag) < .003 < .003 < 003 < 005 < .003 < 003 ,005 Vanadium (V) < .002 < .002 < .002 < .002 < .005 < .005 < ,002 Zinc (Zn) < .004 005 .035 < .004 < .004 < .004 < 004 Parameter value is less than given detection limits Parameter was not analyzed TABLE 10 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D- DATE SAMPLED 5- 1 5-86 D-1 10-28-86 0-1 4-24-87 D-1 10-28-87 D-1 4-28-88 D- 11- 1 3-88 D- 4- 1 28-89 MAJOR IONS (mg/l except as noted) 31.0 Calciun (Ca) 27,0 32 0 30.0 31.0 33 0 31,0 31.0 Magnesium (Mg) 23 0 26.0 24.0 24 0 24.0 25 0 24 0 Sodiun (Na) 197.0 190.0 180 0 204 0 191 0 187,0 189 0 Potassiun (K) 47.0 SO 0 46.0 49 0 47 0 47.0 48 0 Bicarbonate (HC03) 603 5 614 5 614 5 609 6 591 3 626.7 595 0 Carbonate (C03) < 3.0 < 3 0 < 3.0 < 3.0 < 3 0 < 3.0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (CI) 137 0 140.0 142 0 140 0 146 0 149.0 144 0 Fluoride (F) 1.60 .80 .80 .70 80 2 90 .80 Sulfate (S04) < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 MINOR IONS (mg/l) .1 1 Nitrate+Nitnte (as N) < .1 < .1 < .1 < .1 < 2.0 < .1 < 1 Organic Nitrogen (as N) < .1 .7 < .1 < 1.0 1 0 < 1 0 < 2 0 Annonia (as H) 16.7 16.0 16.0 14.0 12 0 16 0 13 0 Sulfide < .05 < .05 < .05 < .05 < .05 .05 13 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 75 7.58 7.30 7.30 7.37 7 71 7 50 Sp Conductance (urhos/cm) 1000 0 1200 0 1400.0 1400 0 1600,0 1500 0 1400 0 OTHER PARAMETERS Lab pH (units) 8 17 7 88 7.53 7 61 7.70 6 80 7 80 Lab Conductivity (unhos/cm) 1390 0 1360 0 1370 0 1360 0 1380 0 1520 0 1220 0 Total Suspended Solids(mg/l)< 10 0 < 5 0 < 2.0 < 2 0 4 0 < 2 0 < 2 0 Total Dissolved Solids(mg/l) 775 0 640 0 800 0 780 0 748 0 760 0 759 0 Oil & Grease (mg/l) < 5 < 5 < 1.0 < 1 0 1.0 < 1 0 < 1.0 Total Organic Cartxxi (mg/l) 11 0 6 1 5 8 6 1 6 7 5 7 6 2 Total Organic Halogen ugCl/l 32 0 51 0 34.0 26 0 15 0 43 0 22,0 ALKALINITIES as B«/l CaC03 Total Alkalinity 495 0 504 0 504 0 500 0 485 0 514 0 488 0 Bicarbonate Alkalinity 495 0 504 0 504.0 500 0 485 0 514 0 488 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .003 004 .004 < 003 < 003 < 003 < 003 Barium (Ba) .140 140 .140 .130 .130 190 .140 Cadmium (M) < .004 < 004 < 005 < 005 < .005 < 005 < 005 Chromiun hex (Cr+6) < .010 < 010 < .010 < 010 < .010 < 010 010 Total Chromiun (Cr) < 005 < .005 < 005 < .010 < 010 < 010 < 010 Lead (Pb) < .020 < 020 < .002 < .002 < 002 < .004 .002 Manganese (Mn) 120 120 .120 .120 110 .120 120 Mercury (Hg) < 0001 < 0001 < 0001 < 0001 < 0001 < 0001 < ,0001 Nickel (NO < 010 < 010 < .040 < 040 < .040 < 040 < 040 Selenium (Se) < .004 < 010 < .020 < 010 < .002 < .002 < 002 Silver(Ag) < 003 < 003 < 005 < .005 < .005 < 005 < 005 Vanadiun (V) < .002 < .002 < .010 < 010 < 010 < 010 < 010 Zinc (Zn) .010 008 < .010 < .010 < .010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 10 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-1 DATE SAMPLED 11-1-89 D-1 4-25-90 D- 10- 1 25-90 MAJOR IONS (mg/l except as noted) Calcium (Ca) 31.0 30.5 31.6 Magnesiun (Mg) 23.0 23 3 25.4 Sodiun (Na) 209.0 187.0 178 0 Potassiun (K) 52.0 46.5 45.8 Bicarbonate (HC03) 585 2 603 5 586,5 Carbonate (C03) < 3 0 < 3.0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (CI) 146.0 141.0 148 0 Fluoride (F) .70 .70 3.50 Sulfate (504) < 5 0 < 5.0 < 5.0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 Organic Nitrogen (as N) 3 0 < 5.0 < 2.5 Annonia (as N) 14.0 13.5 14.6 Sulfide < .05 .05 < .05 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 40 7 48 7 57 Sp Conductance (unhos/cm) 1150 0 1550.0 1500,0 OTHER PARAMETERS Lab pH (units) 7.70 7.70 7.80 Lab Conductivity (unhos/cm) 1170.0 1200 0 1390 0 Total Suspended Solids(mg/l)< 2.0 < 2 0 9 6 Total Dissolved Solids(mg/l) 740.0 764.0 785.0 Oil & Grease (mg/l) 2.0 13.8 1 7 Total Organic Carbon (mg/l) 6.5 6 7 5.6 Total Organic Halogen ugCl/l< 30 0 < 30 0 59.0 ALKALINITIES as mg/l CaC03 Total Alkalinity 480 0 495.0 481.0 Bicarbonate Alkalinity 480 0 495 0 481 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < .010 < .010 < .005 Barium (Ba) .150 .170 140 Cadmiun (Cd) < .005 < 005 < 005 Chromiun Hex (Cr+6) < .010 < .010 < 010 Total Chromiun (Cr) < .010 < .010 < 010 Lead (Pb) < .005 < .010 < .005 Manganese (Mn) .120 .110 .120 Mercury (Hg) < .0002 < 0002 < .0002 Nickel (NO < .040 < .040 < .040 Selenium (Se) < .005 < .005 < .050 Silver(Ag) < 010 < .010 < 010 Vanadiun (V) < 010 < 010 < .010 Zinc (Zn) < .010 < .010 < .010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 10 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene Chloroform Cyclohexane Ethylbenzene Toluene 1,1,1-Trichloroethane m-Xylene o,p-Xylene Xylenes,Total BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene Naphthalene ACID COMPOUNDS (ug/l) 0- Cresol m+p-Cresol Phenol OTHER DETECTED ORGANICS (ug/l) Acenaphthene Acetone Acetonitrile Aniline Benzenethiol (4) Bis(2-ethylhexyl)phthalate 2-Butanone Carbon Disulfide Oichloromethane 2,4-Dimethylphenol Di-n-octylphthalate 2- Hexanone Indene 3- Hethylcholanthrene Methyl mercaptan 1- Methylnaphthalene 2- Methylnaphthalene 4- Methyl-2-pentanone Pentachlorophenol Ouinoline D-1 0-1 D-1 D-1 D-1 0-1 D-1 7-23-84 8-27-84 9-25-84 10-25-84 2-5-85 4-25-85 11-4-85 < SO < 5,0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < 5,0 < 5 0 < 5 0 < SO < 5.0 < 5.0 < 5.0 < S 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < SO < 5.0 < 5.0 < 5 0 < 5 0 < 5,0 < 5 0 • • • • • • • < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 S 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < SO < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2600 0 42.0 17.0 77.0 < 10 0 20 0 < 10 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < SO < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 22 0 25 0 53 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10,0 < 10 0 < 10 0 < SO < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < SO < 5 0 < 5 0 5,0 < 5,0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10,0 < 10 0 < 10 0 < SO < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < SO < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4). Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 10 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-1 D-1 0-1 D-1 D-1 D-1 D-1 DATE SAMPLED 5-5-86 10-28-86 4-24-87 10-28-87 4-28-88 11-3-88 4-28-89 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < S.O < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < S.O < S.O < 5 0 < S.O < 5 0 < 5.0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10.0 < 10 0 < 10.0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5.0 < S 0 < S.O < 5.0 < 5 0 < 5 0 Toluene < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m-Xylene < 5.0 < S.O < 5 0 < 5 0 < 5 0 * * o,p-Xylene < S.O < 5.0 < 5.0 < S 0 < 5 0 • • Xylenes,Total • • • • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < S.O < 5.0 < 5 0 < S.O < 5 0 < 5.0 < 5 0 Naphthalene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < S.O < S 0 < 5 0 < 5,0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < SO 0 5300 0 < 25 0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100 0 < 100.0 < 100 0 < 100 0 < 100.0 < 100 0 Aniline < 5 0 < 5.0 < 5.0 < 5 0 < 5,0 < 5 0 < 5.0 Benzenethiol (4) < 10.0 < 10 0 * * * • • Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 50.0 < 10.0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25.0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ol-n-octylphthalate < 5.0 < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 10 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-1 0-1 D-1 DATE SAMPLED 11-1-89 4-25-90 10-25-90 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5.0 Chloroform < 5.0 < 5 0 < 5.0 Cyclohexane (2) < 10 0 • • Ethylbenzene < 5 0 < 5 0 < 5.0 Toluene < S.O < 5.0 < 5.0 1,1,1-Trichloroethane < 5.0 < 5 0 < 5 0 n-Xylene * * • o,p-Xylene • * * Xylenes,Total < 5.0 < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < S 0 < S.O < 5 0 Naphthalene < 5.0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone < 10.0 < 10.0 62.0 Acetonitrile (1) < 100 0 * * Aniline < 5.0 < 5.0 < 5 0 Benzenethiol (4) * • • Bi8(2-ethylhexyl)phthalate < 5.0 < 5 0 < 5 0 2-Butanone < 10.0 < 10 0 64 0 Carbon Disulfide < 5.0 < 5 0 < 5 0 Oichloromethane 11 0 < 5 0 < 5 0 2,4-0imethylphenol < 5.0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 54 0 Indene < 5 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5.0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * • 1-Methylnaphthalene (3) < 5,0 * • 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) . Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) , Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value. (4) Not consistently recovered using metho 8240/8270. < Parameter value is less than given detection limits * Parameter was not analyzed SAMPLE IDENTIFICATION DATE SAMPLED D-2 7-16-84 TABLE 11 CHEVRON SEMI-ANNUAL SAMPLE DATA 0-2 8-22-84 D-2 9-18-84 D-2 10-18-64 D-2 2- 5-85 D-2 4-26-85 D 2 11- 6-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) Magnesium (Mg) Sodiun (Na) Potassium (K) Bicarbonate (HC03) Carbonate (C03) < Hydroxide (OH) Chloride (CI) Fluoride (F) Sulfate (S04) < MINOR IONS (mg/l) Nitrate+Nitnte (as N) Organic Nitrogen (as N) Ammonia (as N) Sulfide Total Cyanide 27.0 19.0 267.0 39 0 792.5 3.0 .0 85.0 .67 5 0 .2 .4 9.6 .05 .01 24 16 237 37 762 3 0 0 0 0 0 0 .0 69.0 .90 5.0 .1 5 1 8.9 .05 .01 25 17. 238. 36. 775. 3. 0 0 0 0 4 0 0 80.0 1.00 16.0 .1 2 2 8.8 .05 .01 28 0 18.0 260.0 38.0 790 1 3.0 .0 94 0 1.30 8 0 .1 .1 9.0 .06 .01 25 18 250 32 796 3 0 0 0 0 2 0 .0 83.0 .80 10 0 .2 .8 9.2 .05 .01 27 17 270 35 763 6. 0 0 0 0 3 6 .0 81 0 1.00 5 0 1 .1 8 5 05 .01 FIELD MEASUREMENTS 32 0 18 0 257 0 36 0 765 7 3.0 .0 82 0 90 10 0 .5 2 6 7 0 .05 .01 Field pH 7.49 7.45 7 49 7.62 7.52 7.66 7 61 Sp Conductance (urtios/cm) 1400.0 1800 0 1300.0 1450 0 1600.0 1500 0 • OTHER PARAMETERS 7,63 Lab pH (units) 7.66 7.66 8 30 7.57 7.67 7 73 7,63 Lab Conductivity (unhos/cm) 1410 0 1410 0 1440 0 1510 0 1420 0 1430 0 1350 0 Total Suspended Solids(mg/l)< 2.0 6.0 < 2 0 < 4.0 < 2 0 < 2.0 < 2 0 Total Dissolved Sot{ds(mg/l) 870.0 895.0 870.0 880.0 985 0 900 0 870 0 Oil & Crease (mg/l) < 1 0 2.0 < 1.0 * < 1.0 1 0 < 1.0 Total Organic Carbon (mg/l) 12 0 14 0 15.0 12 0 14.0 15 0 12.0 Total Organic Halogen ugCl/l 13 0 16 0 41.0 34 0 15.0 15 0 110 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 650 0 625 0 636 0 648 0 653 0 637.0 628,0 Bicarbonate Alkalinity 650.0 625 0 636 0 648 0 653 0 626 0 628 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 11 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .009 .006 .004 005 .008 .007 .009 Bariun (Ba) 160 .130 140 140 .130 .150 130 Cadmiun (Cd) .004 < 002 < 002 < 002 < 009 < .009 < 004 Chromiun Hex (Cr+6) < 010 < .010 < .010 < .010 < 010 < 010 < 010 Total Chromiun (Cr) < .005 .007 < 005 < 005 < ,005 < 005 < 005 Lead (Pb) < 025 < .025 < 025 < .025 < .030 < .030 < 025 Manganese (Mn) 074 .068 .064 .068 .065 070 068 Mercury (Hg) < .0003 < .0002 < .0002 < .0002 < 0002 < .0002 < 0001 Nickel (Ni) < 010 < .010 < 010 < .010 .007 < .006 < ,010 Seleniun (Se) < .002 < 020 < .020 < .030 < 002 < ,002 < .020 Silver(Ag) < .003 < .003 < 003 < .005 < .003 < 003 < 003 Vanadium (V) 002 .004 .004 < .002 < 005 < ,005 .002 Zinc (Zn) < .004 .030 < .004 .088 < 004 < .004 < 004 Parameter value is less than given detection limits Parameter was not analyzed TABLE 11 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-2 DATE SAMPLED 5- 1-86 0-2 10-30-86 D-2 4-22-87 D-2 10-29-87 D- 4- 2 29-88 D- 11- 2 1-88 D 5- 2 2-89 MAJOR IONS (mg/l except as noted) Calcium (Ca) 26.0 27.0 26 0 26 0 28 0 24 0 26 0 Magnesiun (Mg) 18.0 18 0 18 0 18 0 18 0 17 0 18 0 Sodiun (Na) 250 0 250.0 245 0 258 0 257.0 236 0 279 0 Potassiun (K) 35.0 36.0 35 0 36.0 36.0 34 0 36 0 Bicarbonate (HC03) 791.3 819.3 814.5 790 1 770 6 793 7 813 2 Carbonate (C03) < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 0 Chloride (CI) 80 0 89.0 81 0 98 0 78 0 83 0 81 0 Fluoride (F) .80 1.00 1.00 .80 .90 .90 1 10 Sulfate (S04) < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .5 < .1 < .1 < .1 < 2 0 < 1 < 2 Organic Nitrogen (as N) .6 .4 .2 3.0 .5 .3 < 1 0 Ammonia (as N) 9 1 9 4 9.6 8 9 9.5 9 6 9.0 Sulfide < .05 < .05 .10 < .05 < .05 < 05 07 Total Cyanide < .01 < .01 < .01 < .01 < .01 < 01 < 01 FIELD MEASUREMENTS Field pH 7 69 7.66 7.55 7.51 7 40 7 52 7 56 Sp Conductance (urhos/cm) 1550 0 1400.0 1300 0 1500.0 1500 0 1600 0 1500 0 OTHER PARAMETERS Lab pH (units) 8 11 7.82 7.70 7.85 7 70 8 20 8 00 Lab Conductivity (unhos/cm) 1340 0 791 0 1450 0 1390 0 1400 0 1420 0 1250 0 Total Suspended Solids(mg/l)< 10.0 < 3.0 < 2.0 < 2 0 4.0 2 0 170 0 Total Dissolved Solids(mg/l) 775 0 832.0 960.0 840 0 840 0 850 0 931 0 Oil & Grease (mg/l) < .5 < .5 < 1 0 < 1.0 < 1 0 < 1 0 < 1 0 Total Organic Carbon (mg/l) 14 0 13 0 11.0 13 0 11 0 11 0 15 0 Total Organic Halogen ugCl/l 21.0 31.0 57.0 22 0 20 0 6 0 21 0 ALKALINITIES as n^/l CaC03 Total Alkalinity 649 0 672 0 668 0 648.0 632 0 651 0 667 0 Bicarbonate Alkalinity 649 0 672 0 668 0 648 0 632 0 651 0 667 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (n«/l) Arsenic (As) .007 008 .008 .008 005 < .006 007 Bariun (Ba) .130 .140 .140 140 .140 .140 120 Cartniun (Cd) < .004 < .004 < .005 < 005 < 005 005 < 005 Cl omiun Hex (Cr+6) < .020 < 010 < .010 < 010 < .010 .020 < 010 Total Chromiun (Cr) < 005 < 005 . < .005 < .010 < .010 < .010 < 010 Lead (Pb) < .020 < .020 < .004 < .020 < .002 < .002 003 Manganese (Mn) .069 066 070 .073 .070 .067 009 Mercury (Hg) < .0001 < 0001 < .0001 < .0001 < .0001 < 0001 < .0001 Nickel (NO < .010 < .010 < .040 < .040 < 040 < 040 < .040 Selenium (Se) < 004 < .010 < .008 < .020 < .020 < 002 < 002 Silver(Ag) .004 < .003 < .005 < .050 < .005 < .005 < 005 Vanadium (V) < .002 < 002 < .010 < .010 < 010 < .010 < 010 Zinc (Zn) .008 019 < .010 < .010 < .010 < .010 < .010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 11 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D- DATE SAMPLED 11- 2 2-89 0-2 4-26-90 D-2 10-26-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 25.0 27.2 25 4 Magnesiun (Mg) 16.0 17.8 16 1 Sodiun (Na) 261.0 268 0 266.0 Potassiun (K) 36,0 38 6 35.2 Bicarbonate (HC03) 834.0 807 1 812.0 Carbonate (C03) < 3 0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 80 0 79.2 82 4 Fluoride (F) 1.00 .79 .88 Sulfate (S04) < 5.0 < 5.0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) < .1 < .1 < .1 Organic Nitrogen (as N) 2 1 2 9 < 2.5 Annonia (as N) 8.9 8 4 8 9 Sulfide < 05 < OS .07 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 46 7 77 7.61 Sp. Conductance (umhos/cm) 1300 0 1600 0 1400 0 OTHER PARAMETERS Lab pH (units) 7.80 7.80 7.90 Lab Conductivity (unhos/cm) 1260 0 1380.0 1300 0 Total Suspended Solids(mg/l) 257.0 < 2.0 2 8 Total Dissolved Solids(mg/l) 1040 0 863.0 945,0 Oil & Grease (mg/l) 2.0 1.0 < 1,0 Total Organic Carbon (mg/l) 48 0 11.9 14,4 Total Organic Halogen ugCl/l< 60 0 < 30 0 < 30 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 684 0 662 0 666 0 Bicarbonate Alkalinity 684 0 662 0 666 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .008 < .020 < .010 Bariun (Ba) 140 .140 .120 Cadmiun (Cd) < .005 < .005 < 005 Chromium Hex (Cr+6) < .010 < .010 < .010 Total Chromium (Cr) < .010 < 010 < .010 Lead (Pb) < 005 < .010 < .010 Manganese (Mn) .060 .067 .067 Mercury (Hg) < .0002 < 0002 < .0002 Nickel (NO < .400 < .040 < .040 Seleniun (Se) < .005 < 005 < .050 Silver(Ag) < .010 < .010 < 010 Vanadiun (V) < .010 < .010 < 010 Zinc (Zn) < 010 < 010 < .010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 11 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION 0-2 0-2 D-2 D-2 0-2 0-2 0-2 DATE SAMPLED 7-16-84 8-22-84 9-18-84 10-18-64 2-5-85 4-26-85 11-6-85 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5 0 < S 0 < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1 -Tnchloroethane < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 m-Xylene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Xylenes,Total • • • * • * * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Naphthalene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 Phenol < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5,0 < 5 0 < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 < 10 0 20 0 < 10 0 21.0 < 10 0 Acetonitrile < 100.0 < 100 0 < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 Aniline < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5.0 18.0 < 5 0 54 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 Methyl mercaptan * < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalerv* < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentani,iie < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 PentachIorophenoI < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 11 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION 0-2 0-2 0-2 0-2 D-2 D-2 0-2 DATE SAMPLED 5-1-86 10-30-86 4-22-87 10-29-87 4-29-88 11- 1 -88 5-2 89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Chloroform < S.O < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Toluene < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 1,1,1-Tn ch loroethane < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m-Xylene < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 * * o,p-Xylene < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 * * Xylenes,Total * • * • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < S 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 230 0 < 25.0 < 25 0 < 25 0 < 25 0 Acetonitn le < 100 0 < 100 0 < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10.0 < 10 0 • • • * • 6is(2-ethylhexyl)phthalete < 5 0 < 5 0 7.3 < 5 0 < 5 0 < 5 0 22 0 2-Butanone < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10.0 < 10 0 < 10.0 < 25 0 < 25.0 < 25 0 < 25 0 2,4-Dimethylphenol < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5,0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-MethyInaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 C < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 11 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) D-2 11- 2-89 D-2 4-26-90 0-2 10-26-90 Benzene < 5 0 < 5.0 < 5 0 Chloroform < 5.0 < 5 0 < 5 0 Cyclohexane (2) < 10 0 * • Ethylbenzene < 5 0 < 5.0 < 5 0 Toluene < 5 0 < S.O < 5 0 1,1,1-Tnchloroethane < 5.0 < 5.0 < 5 0 n-Xylene * • • o,p-Xylene • * * Xylenes,Total < 5 0 < 5,0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10.0 < 10 0 Acetonitrile (1) < 100 0 • • Aniline < 5 0 < 5 0 < 5 0 Benzenethiol (4) • • • Bis(2-ethylhexyl)phthalate < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane < .5 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 DI-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10.0 < 10.0 Indene < 5 J < 5.0 < 5 0 3-Hethylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 • • 1-Hethylnaphthalene (3) < 5 0 * * 2-Hethylnaphthalene < ^ 0 < 5,0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5.0 < 5 0 < 5 0 Ouinoline < 5 0 < 5,0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) - Identification of this coopound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but is within 10X of the true value (4) Not consistently recovered using metho 8240/8270. < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 12 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED D-4 7-10-84 D-4 8-15-84 0-4 9-10-84 0-4 10-23-84 D-4 2- V 85 D-4 4-29-85 D-4 10 29-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) 69,0 Magnesiun (Mg) 24.0 SodiLRi (Na) 52 0 Potassium (K) 20 0 Bicarbonate (HC03) 410.9 Carbonate (C03) < 3.0 Hydroxide (OH) .0 Chloride (Cl) 55 0 Fluoride (F) .30 Sulfate (S04) < SO MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 Organic Nitrogen (as N) .5 Annonia (as N) 4 5 Sulfide < 05 Total Cyanide < .01 FIELD MEASUREMENTS Field pH 7 65 Sp Conductance (urhos/cm) 800 0 72 0 24.0 52.0 19.0 404.8 3 0 .0 73.0 .40 14.0 .1 2.5 4.4 .05 .01 7.34 860 0 72.0 24.0 54.0 19.0 401 1 3.0 .0 70.0 .60 15 0 1 1.1 4 4 .06 .01 7 41 1000 0 71.0 24 0 54 0 20 0 417 0 3.0 0 59.0 .40 8.0 .1 .1 4.6 .08 .01 7.56 720 0 72 23 35 10 387 3 0 0 0 0 7 0 0 59 0 .40 5 0 1 1 2 6 .05 .01 7.43 710.0 79 22 47 11 375 3 62 0 0 0 0 5 0 0 0 .40 5 0 OTHER PARAMETERS Lab pH (units) 7 43 7 41 7.95 7 67 7 53 Lab Conductivity (urhos/cm) 850.0 833 0 820 0 872.0 810 0 Total Suspended Solids(mg/l) 4 0 6 0 < 2.0 28.0 12.0 Total Dissolved Solids(ing/l) 470 0 475 0 385.0 494.0 270.0 Oil t Grease (mg/l) < 1 0 < 1.0 < 1.0 1 0 < 1.0 Total Organic Carbon (mg/l) 12 0 3.6 11 0 17.0 1.5 Total Organic Halogen ugCl/l 11.0 < 10 0 15 0 12.0 10 0 ALKALINITIES as mg/l CaC03 1 2 2 4 .05 .01 7.54 900 0 7 45 794 0 3 460 1 4 5 92 22 43 12 381 3 0 0 0 0 6 0 .0 73 0 .40 5 0 .1 .3 2 9 .05 .01 7 53 7 78 739 0 2. 460 1. 3 8 Total Alkalinity 337 0 332 0 329 0 342 0 318 0 308 0 313.0 Bicarbonate Alkalinity 337.0 332 0 329 0 342 0 318 0 308 0 313 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 E METALS (mg/l) Arsenic (As) < .002 < .002 < .002 < 002 .004 < .002 002 Banun (Ba) .200 .210 .210 .200 .170 170 150 Cadmiun (Cd) < C02 < .002 < .002 < 002 < .009 < 009 < .004 Chromiun Hex (Cr+6) < .010 < 010 < 010 < .010 < 010 < 010 < 010 Total Chromiun (Cr) < 005 < 005 < 005 < .005 < 005 < .005 < .005 Lead (Pb) < .025 < 025 < 025 < .025 < 030 < ,030 < 025 Manganese (Mn) .160 170 160 160 150 150 140 Mercury (Hg) < .0003 < .0002 < .0002 < .0002 < .0002 < .0002 < .0001 Nickel (Ni) < .010 < 010 < .010 < .010 < ,006 < .006 < .010 Selenium (Se) < 002 < 020 < .020 < 030 < 002 < 002 < 004 S}lver(Ag) < .003 < 003 < .003 < 005 < 003 < 003 < 003 Vanadium (V) < .002 < .002 < .002 < .002 < .005 < 005 < 002 Zinc (Zn) .004 .023 .033 < .004 < 004 010 010 < Parameter value is less than given detection limits *. Parameter was not analyzed TABLE 12 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D- DATE SAMPLED 5- 4 6-86 D-4 10-28-86 0-4 4-27-87 0-4 10-28-87 0- 4- 4 29-88 D- 11- 4 2-88 D- S- 4 1-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) 76 0 81 0 78 0 83.0 78 0 63 0 68 0 Magnesium (Hg) 21.0 24 0 23.0 24.0 22 0 23 0 24 0 Sodiun (Na) 43 0 46 0 44.0 66 0 46.0 58 0 64 0 Potassium (K) 12.0 14.0 13 0 13 0 12 0 18 0 21 0 Bicarbonate (HC03) 375.5 437.7 392 6 388.9 379.2 454 8 423 1 Carbonate (COS) < 3.0 < 3 0 < 3.0 < 3 0 < 3.0 < 3.0 < 3 0 Hydroxide (OH) 0 .0 .0 .0 .0 .0 .0 Chloride (Cl) 52.0 60 0 67.0 64.0 59 0 62 0 60 0 Fluoride (F) .50 .40 .40 .30 .30 .40 .60 Sulfate (S04) < 5.0 < 5 0 < 5 0 < S 0 < 5 0 < 5 0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 < .1 < 2.0 < 1 < .1 Organic Nitrogen (as N) < .1 < .1 < .1 < .1 < .2 .1 < 2 0 Annonia (as N) 2 9 3 0 3.0 2.8 2.3 5.4 5 5 Sulfide < .05 < .05 < .05 < .05 • 07 .07 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 72 7.57 7 48 7.50 7 34 7.34 7 28 Sp Conductance (urhos/cm) 700 0 780 0 720 0 1100.0 1000 0 820 0 1000 0 OTHER PARAMETERS Lab pH (units) 7.44 7 65 8 12 7 74 7 70 7.40 7 60 Lab Conductivity (unhos/cm) 764.0 773 0 792 0 740 0 753.0 1300 0 765 0 Total Suspended Solids(mg/l)< 10 0 < 5.0 < 10 0 8 0 5.0 < 2 0 < 10 0 Total Dissolved Solids(n«/l) 475.0 335 0 480 0 440 0 430.0 560 0 474 0 Oil t Grease (mg/l) < .5 < .5 < 1 0 < 1.0 < .1 < 1 0 < 1 0 Total Organic Carbon (mg/l) 4 3 1 4 1 8 1 1 1.7 3.5 2 4 Total Organic Halogen ugCl/l 14 0 20 0 36.0 28 0 140 0 36 0 26 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 308 0 359.0 322 0 319 0 311.0 373 0 347 0 Bicarbonate Alkalinity 308 0 359 0 322.0 319.0 311.0 373 0 347 0 Carbonate Alkalinity < 5 0 < 5,0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < .004 < 002 < .003 .004 < .003 < .003 < .003 Bariun (Ba) .160 ,170 .160 .170 .160 .190 200 Cadnium (Cd) < .004 < ,004 < .005 < 005 < .005 < .005 < 005 Chromiun Hex (Cr+6} < .010 < 10 < 010 < 010 < 010 < 010 < .010 Total Chromium (Cr) .016 ' < .005 . < .005 < .010 < .010 < .010 < 010 Lead (Pb) < .020 < .020 < .002 < .002 < .004 < .002 < 004 Manganese (Mn) 150 150 .150 .170 .150 150 .160 Mercury (Hg) < .0001 < 0001 < .0001 < 0001 < .0001 < .0001 < 0001 Nickel (NO < .010 < .010 < .010 < 040 < 040 < 040 < 040 Seleniun (Se) < .008 < 004 < .040 < .008 < .002 < 004 < 002 Silver{Ag) < .003 < .003 < 005 < .005 < 005 < 005 < 005 Vanadiun (V) < .002 < 002 < 010 < .010 < .010 < 010 < 010 Zinc (Zn) .018 .005 < 010 < 010 < 010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 12 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-4 0-4 D-4 DATE SAMPLED 10-31-89 4-26-90 10-29-90 MAJOR IONS (mg/l except as noted) Calcium (Ca) 72.0 70.2 68,1 Magnesium (Mg) 25.0 24.5 24 7 Sodiun (Na) 61.0 64.1 60 5 Potassiun (K) 19.0 22.7 19.8 Bicarbonate (HC03) 417.0 430.4 432.8 Carbonate (C03) < 3.0 < 3.0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 59 0 58.3 63 9 Fluoride (F) .50 .42 .98 Sulfate (S04} < 5 0 < 5.0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 Organic Nitrogen (as N) < .5 1.4 < .5 Annonia (as N) S 2 4.7 5 2 Sulfide < .05 < .05 .07 Total Cyanide < .01 < .01 < .01 FIELD MEASUREHENTS Field pH 7.54 7.56 7.50 Sp Conductance (urhos/cm) 1000 0 1050.0 1000 0 OTHER PARAMETERS Lab pH (units) 7.70 7.80 8 10 Lab Conebctivity (unhos/cm) 730 0 748.0 755.0 Total Suspended Solids(mg/l)< 2 0 13.2 12.0 Total Dissolved Solids(nig/l) 488 0 487.0 472 0 Oil & Grease (mg/l) 2.0 1.0 < 1.0 Total Organic Carbon (mg/l) 3 1 3 1 2 7 Total Organic Halogen ugCl/l< 30 0 < 30 0 < 30 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 342 0 353.0 355.0 Bicarbonate Alkalinity 342.0 353.0 355 0 Carbonate Alkalinity < 5.0 < 5.0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < .005 < .010 < .010 Barium (Ba) 200 .170 .190 CadmiLin (Cd) < 005 < .005 < .005 Chromium Hex (Cr+6) < .010 < .010 < .010 Total Chromium (Cr) < .010 < .010 .< .010 Lead (Pb) < .005 < .010 < .010 Manganese (Mn) .180 .150 .160 Hercury (Hg) < .0002 < 0002 < .0002 Nickel (NO < 040 < 040 < 040 Selenium (Se) < .005 < .005 < .005 Silver(Ag) < .010 < .010 < 010 Vanadiun (V) < .010 < .010 < .010 Zinc (Zn) < .010 < .010 < .020 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 12 CHEVRON SEHI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED D-4 7-10-84 0-4 8-15-84 D-4 9-10-84 D-4 10-23-84 D-4 2- 1-85 D-4 4-29-85 D-4 10-29-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5 0 < S.O < 5.0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10 0 < 10.0 < 10 0 < 10.0 < 10 0 Ethylbenzene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Toluene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1>TrichIoroethane < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 n-Xylene < 5 0 < 5.0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Xylenes,Total • * • * * • * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5.0 < 5,0 < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < S.O < 5.0 < 5.0 < 5 0 < 5.0 < S 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10.0 < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Acetonitrile < 100 0 < 100 0 < 100.0 < 100 0 < 100.0 < 100 0 < 100 0 Aniline < 5 0 < 5.0 < S.O < 5.0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10.0 < 10.0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Bis(2<ethylhexyl)phthalate < 5 0 < 5.0 5.0 38 0 24 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Oi-n-octylphthalate < 5 0 < 5 0 < 5 0 8 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5.0 < S.O < 5.0 < S.O < 5,0 < 5 0 < 5 0 3-Hethylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Hethylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10.0 < 10 0 < 1C 3 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 12 (CONTINUED) CHEVRON SEHI-ANNUAL SAHPLE DATA SAMPLE IDENTIFICATION D-4 0-4 D-4 D-4 D-4 D-4 0-4 DATE SAMPLED 5-6-86 10-28-86 4-27-87 10-28-87 4-29-88 11-2-88 5- 1 -89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 Toluene < 5 0 < 5,0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 1,1,1-Tnchloroethane < 5 0 < 5.0 < 5.0 < S.O < 5.0 < 5.0 < 5 0 n-Xylene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 * • o,p-Xylene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 • • Xylenes,Total * * * • * < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 5 0 < 5.0 < 5.0 < 5.0 < 5.0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5.0 < S.O < 5.0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10.0 180.0 < 25.0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100.0 < 100 0 < 100.0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < 5.0 • < 5.0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10.0 < 5.0 • * * • Bis(2-ethylhexyl)phthalate 340 0 < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 5.0 < 25.0 < 25.0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10.0 < 10 0 Indene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentenone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4). Not consistently recovered using metho 8240/8270. Parameter value is less than given detection limits Parameter was not analyzed TABLE 12 CHEVRON SEHI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS. VOLATILES (ug/l) D-4 10-31-89 0-4 4-26-90 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) . Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 D-4 10-29-90 Benzene < 5.0 < 5 0 < 5.0 Chloroform < 5 0 < 5 0 < 5.0 Cyclohexane (2) < 10.0 * • Ethylbenzene < 5.0 < 5.0 < 5 0 Toluene < 5.0 < 5,0 < 5 0 1,1,1-Trichloroethane < 5 0 < S.O < 5 0 m-Xylene • * * o,p-Xylene • * • Xylenes,Total < 5.0 < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5 0 < 5.0 m+p-Cresol < 5.0 < 5 0 < 5 0 Phenol < 5.0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 < 10 0 Acetonitrile (1) < 100 0 • • Aniline < 5 0 < 5 0 < 5.0 Benzenethiol (4) * * • Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5.0 2-Butanone < 10 0 < 10 0 < 10,0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5.0 < 5.0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5,0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5,0 Methyl mercaptan (2) < 20 0 * * 1-Methylnaphthalene (3) < 5 0 • • 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10.0 < 10 0 < 10 0 Pentachlorophenol < 5.0 < 5 0 < 5.0 Ouinoline < 5.0 < 5 0 < 5.0 Parameter value is less than given detection limits Parametar was not analyzed TABLE 13 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION DATE SAMPLED 0-5 7-11-84 MAJOR IONS (mg/l except as noted) Calciun (Ca) 150.0 Hagnesiun (Hg) 53.0 Sodiun (Na) 412 0 Potassium (K) 44.0 Bicarbonate (HC03} 248.7 Carbonate (C03) < 3.0 Hydroxide (OH) .0 Chloride (Cl) 670.0 Fluoride (F) .70 Sulfate (S04) 250.0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) Organic Nitrogen (as N) < Annonia (as N) Sulfide < Total Cyanide < FIELD MEASUREHENTS Field pH Sp Conductance (unhos/cm) OTHER PARAMETERS Lab pH (units) Lab Conductivity (urhos/cm) Total Suspended Solids(mg/l)< Total Dissolved Solids(mg/l) Oil & Grease (mg/l) < Total Organic Carbon (mg/l) Total Organic Halogen ugCl/l ALKALINITIES as ng/t CaC03 Total Alkalinity Bicarbonate Alkalinity Carbonate Alkalinity < TRACE METALS (mg/l) Arsenic (As) Bariun (Ba) Cadmiun (Cd) < Chromiun Hex (Cr+6) < Total Chromium (Cr) < Lead (Pb) < Manganese (Mn) Mercury (Hg) < Nickel (NO < Selenium (Se) < Silver(Ag) < Vanadiun (V) Zinc (Zn) < D-5 8-15-84 D-5 9-14-84 D-5 10-16-84 D-5 1-30-85 D-5 4-30 85 161 0 40 0 401.0 25.0 242 6 3.0 .0 726 0 .70 310.0 0 0 0 0 8 0 .0 705.0 .90 296.0 161 42 398 27 254 3 161 41 430 30 241 3 0 0 0 0 4 0 .0 719.0 .90 292.0 150 43 384 24 245 3. 0 0 0 0 1 0 .0 660 0 .70 280 0 170 0 41 0 430 0 23.0 228 0 9 6 .0 680 0 .80 280 0 D 11-1-85 142 43 422 27 236 3 0 0 0 0 5 0 0 732 0 80 275 0 .2 < .1 < .1 < .1 < 1 < ,1 < 1 .1 .4 .7 < .1 < .1 < 1 7 .1 .1 < .1 .1 < .1 < ,1 < 1 .05 < .05 < .05 < .05 < .05 < ,05 < 05 .01 < .01 < .01 < .01 < .01 < 01 < 01 7.30 7 28 7 31 7 47 7 42 7 39 7 40 3000.0 3400 0 3000 0 2900 0 3500 0 3400 0 * 7.68 7.25 7.40 7.34 7 46 7.36 7.80 3120 0 3150 0 3080 0 3190 0 3180 0 3190 0 3060 0 2.0 2 0 < 2.0 < 4.0 < 2 0 < 2 0 < 2 0 1860 0 1900 0 1860 0 1860 0 1940 0 2020 0 1910 0 1.0 < 1.0 < 1.0 < 1.0 < 1 0 < 1 0 1,0 3 3 2.1 8 3.8 .5 .9 1 7 13 0 < 10 0 28 0 23.0 < 5 0 15 0 5 0 204 0 199.0 209 0 198 0 201.0 203 0 194 0 204 0 199 0 209 0 198 0 201 0 187 0 194 0 5 0 < 5 0 < 5.0 < 5.0 < 5 0 16 0 < 5 0 • < .002 .004 < 002 .003 < 002 < .002 .064 060 .058 .054 054 056 051 .002 < 002 < 002 < 002 < 009 < .009 < 004 .010 < .010 < .010 < .010 < ,010 < 010 < .010 .005 < 005 . < .005 < .005 < 005 < .005 < 005 .025 < .025 < .025 < 025 < ,030 < .030 < ,025 180 032 .030 029 030 033 .028 .0003 < .0002 < .0002 < 0002 < 0002 < 0002 < .0001 .010 < .010 < .010 < .010 < .006 < .006 < 010 .020 < .020 < .020 < .030 < 002 .003 < 004 .003 < .003 < .003 < .005 < .003 < 003 < .003 .002 < 002 < 002 < .002 < 005 < 005 < 002 .004 < .590 .014 .015 < ,004 .014 Oil Parameter value is less than given detection limits Parameter was not analyzed TABLE 13 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED D-5 4-29-86 D-5 10-27-86 D-5 4-23-87 D-5 10-26-87 D-5 4-28-88 D-5 10-28-88 D-5 5- 2-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) Magnesiun (Hg) Sodiun (Na) Potassiun (K) Bicarbonate (HC03) Carbonate (C03) Hydroxide (OH) Chloride (Cl) Fluoride (F) Sulfate (S04) MINOR IONS (ii«/l) Nitrate+Nitrite (as N) Organic Nitrogen (as N) Airmonia (as N) Sulfide Total Cyanide FIELD MEASUREMENTS Field pH Sp Conductance (unhos/cm) OTHER PARAMETERS Lab pH (units) Lab Conductivity (urhos/cm) Total Suspended Solids(mg/l) Total Dissolved Solids(mg/l) Oil t Grease (mg/l) Total Organic Carbon (mg/l) Total Organic Halogen ugCl/l ALKALINITIES as ii«/l CaC03 Total Alkalinity Bicarbonate Alkalinity Carbonate Alkalinity TRACE METALS (ns/l) Arsenic (As) Barium (Ba) Cadniun (Cd) Chromiun Hex (Cr+6) Total Chromiun (Cr) Lead (Pb) Manganese (Mn) Mercury (Hg) Nickel (Ni) Seleniun (Se) SiIver(Ag) Vanadiun (V) Zinc (Zn) < Parameter value is less than given detection limits * Parameter was not analyzed 165 0 180.0 161 0 167 0 167 0 162 0 169 0 45 0 46 0 43 0 40 0 41 0 44 0 43 0 433.0 430 0 421.0 424.0 448 0 419 0 445.0 28.0 29,0 27 0 28 0 28 0 27.0 28 0 241 4 246.3 229 2 252 4 235.3 252 4 235 3 < 3.0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 .0 .0 0 .0 .0 0 .0 723 0 810 0 724 0 776 0 785 0 839 0 767 0 .70 .80 80 .70 .70 .70 80 290.0 304 0 275.0 283 0 298 0 299 0 291 0 < .1 < .1 1 0 < .1 < 2.0 < .1 < 2 < .1 < .1 < .1 < .1 < .2 < ,1 < 1 < .1 < .1 < .1 < .1 < .1 < ,1 1 < .05 < .05 < ,05 < .05 .05 < ,05 < 05 < .01 < .01 < .01 < .01 < .01 < .01 < 01 7 50 7 37 7.30 7.34 7.33 7.33 7 43 3200 0 3000 0 3000 0 3410,0 3200 0 3200 0 3300 0 7.32 7 98 8 02 7.55 7,70 7 60 7.70 3350.0 3320 0 3300 0 3270 0 3280 0 2980 0 2950 0 37 0 < 5.0 < 2 0 < 2 0 3 0 < 2 0 < 4 0 1960 0 1970 0 1940 0 1960 0 1950,0 1930 0 1920 0 < .5 < .5 24.0 < 1.0 < 1.0 17.0 43 0 1 8 .2 8 .5 .9 .4 1 1 32 0 < 5 0 51.0 19 0 74 0 12 0 57 0 198 0 202 0 188 0 207 0 193 0 207.0 193 0 198 0 202 0 188 0 207 0 193 0 207 0 193 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 002 < 002 .005 < .003 < .003 < 006 < 003 .049 .047 050 .052 .052 056 ,055 < 004 < .004 < .005 < .005 < 005 < 005 < .005 < .010 < 010 < 010 < 010 < 010 < 010 < v,010 < 005 .008 < .005 < 010 < .010 < .010 < .010 < 020 < .020 < .002 < 002 < .002 < 002 < 002 .031 .032 .030 .028 ,029 .028 035 < 0001 < .0001 < .0001 < .0001 < .0001 < 0001 < 0001 < .010 < .010 < .040 < .040 < .040 < 040 < 040 < .040 < .010 .030 < 004 < 004 < 008 < 002 < .003 < 003 < .005 < .005 < 005 < .005 < 005 < .002 < 002 < .010 < .010 < .010 < 010 < 010 .005 .014 < 010 < .010 < .010 < 010 < 010 TABLE 13 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAMPLED D-5 10-26-89 D-5 4-23-90 < Parameter value is less than given detection limits * Parameter was not analyzed D-5 10-23-90 MAJOR IONS (mg/l except as noted) ^ Calcium (Ca) 161.0 167.0 149 0 • Magnesium (Mg) 42.0 42.6 41.4 • Sodiun (Na) 422.0 437.0 438.0 Potassium (K) 26.0 27 7 28.8 Bicarbonate (HC03) 234.1 239.0 236 5 • Carbonate (COS) < 3.0 < 3 0 < 3.0 • Hydroxide (OH) .0 .0 .0 • Chloride (Cl) 811.0 776.0 823.0 Fluoride (F) .70 .81 .68 ^ Sulfate (S04) 291.0 282.0 303 0 I MINOR IONS (ng/l) Nitrate+Nitnte (as N) < .1 < .1 < 1 Organic Nitrogen (as N) < .5 .7 < .5 • Ammonia (as N) < .1 < .1 < .1 • Sulfide < 05 < .05 < .05 • Total Cyanide < .01 < 01 < .01 FIELD MEASUREMENTS • Field pH 7.15 7.24 7.51 1 Sp Conductance (urhos/cm) 3400.0 3050 0 3100.0 OTHER PARAMETERS • Lab pH (units) 7.60 7.60 7.50 • Lab Conductivity (umhos/cm) 2920 0 2910 0 3200 0 • Total Suspended Solids(nig/l)< 3.0 < 2.0 < 2.0 Total Dissolved Solids(nig/l) 1980 0 1880.0 1900 0 _ Oil & Grease (mg/l) 2 0 1 7 < 1 0 B Total Organic Carbon (mg/l) .7 1.3 < .5 B Total Organic Halogen ugCl/l< 30 0 < 30.0 < 30 0 ALKALINITIES as mg/l CaC03 am Total Alkalinity 192 0 196 0 194.0 fl Bicarbonate Alkalinity 192 0 196.0 194.0 B Carbonate Alkalinity < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) B Arsenic (As) < .005 < .010 < .005 B Banun (Ba) .050 .048 045 Ca«<Tiiun (Cd) < 005 < .001 < .001 Chromium Hex (Cr+6) < 010 < .010 < 010 a Total Chromiun (Cr) < .010 < .010 < .010 fl Lead (Pb) < .010 < .025 < .010 B Manganese (Hn) .030 .023 015 Mercury (Hg) < 0002 < 0002 < 0002 Nickel (NO < .040 < .040 < 040 B Selenium (Se) < .010 < 010 < .010 fl Silver(Ag) < .010 < 010 < 010 Vanadium (V) < 010 < .010 < .010 Zinc (Zn) < .010 < .010 < .010 TABLE 13 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION DATE SAMPLED D-5 7-11-84 D-5 8-15-84 D-5 9-14-84 0-5 10-16-84 0- 5 1- 30-85 D-5 4-30-85 0 5 11- 1-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1 -Tn ch I oroethane < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 n-Xylene < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5,0 < 5 0 o,p-Xylene < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Xylenes,Total • • • * * * * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Phenol < S.O < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5,0 < 5 0 Acetone < 10 0 < 10 0 < 10 0 < 10.0 16 0 11 0 < 10 0 Acetonitn le < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Aniline < S.O < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 6.0 < 5 0 59 0 < 5 0 < 5 0 2-Butanone < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 DI-n-octylphthalate < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 3-Hethylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 1-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 10 0 PentachIorophenoI < 5 0 < 5 0 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 13 (CONTINUED) CHEVRON SEHI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION D-5 0-5 0-5 D-5 D-5 D-5 D-5 DATE SAMPLED 4-29-86 10-27-86 4-23-87 10-26-87 4-28-88 10-28-88 5-2-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < S.O Cyclohexane < 10.0 < 10 0 < 10.0 < 10.0 < 10 0 < 10.0 < 10.0 Ethylbenzene < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 Toluene < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 1,1,1-Tnchloroethane < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 m-Xylene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 * * o,p'Xylene < S.O < 5 0 < S.O < 5 0 < 5.0 * * Xylenes,Total • • * • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Naphthalena < 5 0 < 10.0 < 5.0 < S.O < 5.0 < 5 0 < 5.0 ACID COMPOUNDS (ug/l) o-Cresol < S.O < 10 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ffl+P'Cresol < 5.0 < 10 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 10.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5.0 < 5 0 < 5,0 < 5 0 < 5 0 Acetone < 10 0 < 50 0 1000 0 < 25.0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100 0 < 100.0 < 100.0 < 100 0 < 100 0 < 100 0 Aniline < 5,0 < 10.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 Benzenethiol (4) < 10,0 < 20 0 * • • • * Bis(2-ethylhexyl)phthalate < 5 0 < 10 0 < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 2-Butanone < 10.0 < SO 0 < 10 0 < 25.0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10.0 < 25 0 < 25 0 < 25 0 < 25 0 2,4-Difflethylphenol < 5.0 < 10,0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 10.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 2-Hexanone < 10 0 < 10 0 < 5 0 < 10 0 < 10,0 < 10.0 < 10.0 Indene < 5 0 < 10.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 10 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Methyl mercaptan < 20.0 < 20.0 < 20.0 < 20.0 < 20.0 < 20 0 < 20 0 1-Methylnaphthalene < 5,0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyi-2-pentanone < 10 0 < 20 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 10 0 • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5,0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 <* Parameter value is less than given detection limits * Parameter was not analyzed TABLE 13 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION D-5 0-5 D-5 DATE SAMPLED 10-26-89 4-23-90 10-23-90 ORGANIC COMPOUNDS- VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5.0 Chloroform < 5.0 < 5.0 < 5.0 Cyclohexane (2) < 10 0 * • Ethylbenzene < 5.0 < 5.0 < 5 0 Toluene < 5 0 < 5.0 < 5 0 1,1,1•Tr1chIoroethane < S.O < 5.0 < 5.0 n-Xylene • * * o,p-Xylene • • * Xylenes,Total < 5 0 < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5.0 < 5 0 Naphthalene < 5 0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5,0 < 5 0 < 5 0 m+p-Cresol < 5,0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < S 0 < 5 0 Acetone < 10 0 < 10.0 < 10 0 Acetonitrile (1) < 100.0 • * Aniline < 5.0 < 5 0 < 5 0 Benzenethiol (4) • • • Bis(2-ethylhexyl)phthalate < 5.0 < 5.0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5.0 < 5 0 < 5 0 Oichloromethane < 5 0 < 5.0 < 5 0 2,4-Dimethylphenol < 5.0 < 5.0 < 5 0 Di-n-octylphthalate < 5.0 < 5.0 < 5.0 2-Hexanone < 10 0 < 10 0 < 10.0 Indene < 5 0 < 5 0 < 5 0 3-Hethylchotanthrene (2) < 5.0 < 5.0 < 5 0 Methyl mercaptan (2) < 20 0 * • 1-Methylnaphthalene (3) < 5 0 * * 2-Methylnaphthalene < 5.0 < 5.0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5.0 < 5 0 < 5 0 Ouinoline < 5.0 < 5 0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 14 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D- DATE SAMPLED 7- 10 13-84 0-10 8-24-84 D-10 9-25-84 D-10 10-25-84 D- 1- 10 31-85 D- 4- 10 24-85 D-10 10-30-85 MAJOR IONS (mg/l except as noted) Calcium (Ca) 34.0 32.0 33 0 34 0 33 0 34 0 41 0 Magnesium (Mg) 24 0 22 0 22 0 23 0 25 0 23,0 25.0 Sodiun (Na) 244 0 234.0 230 0 230 0 228 0 260 0 255.0 Potassiun (K) 43 0 41,0 41 0 41 0 38 0 40 0 42 0 Bicarbonate (HC03) 679.1 677.9 652 3 708 4 676.7 557,2 684 0 Carbonate (COS) < 3 0 < 3.0 < 3 0 < 3 0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 .0 Chloride (Cl) 180 0 173 0 172.0 165 0 130.0 182 0 172 0 Fluoride (F) .62 .70 .90 1.20 .80 1.00 .90 Sulfate (S04) < 5.0 < 5.0 5.0 15 0 25.0 < 5 0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) < .1 < .1 < .1 < .1 < .1 < 1 < 1 Organic Nitrogen (as N) 11.0 8.0 1.0 < .1 < .1 .2 4 5 Ammonia (as N) 1.0 12.0 11.0 11.0 12 0 10 0 9 5 Sulfide < .05 < .05 < .05 < < 05 .06 .07 Total Cyanide < .01 < .01 < .01 < .01 < .01 < 01 < .01 FIELD MEASUREMENTS Field pH 7 46 7 41 7 43 7 44 7.35 7.55 7.56 Sp Conductance (urhos/cm) 1400 0 1600 0 1450.0 1600 0 1500 0 1600 0 • OTHER PARAMETERS Lab pH (units) 7.90 7.77 7.95 7.52 7 58 7 67 7.93 Lab Conductivity (Linhos/cm) 1530.0 1540 0 1550 0 1590.0 1620 0 1620.0 1460 0 Total Suspended Solids(mg/l)< 2.0 4 0 < 2 0 < 4 0 < 2 0 < 2 0 < 2 0 Total Dissolved Solids(mg/l) 860 0 920 0 830.0 905 0 905.0 940 0 665 0 Oil & Grease (mg/l) < 1 0 < 1.0 < 1.0 < 1 0 < 1.0 1.0 < 1.0 Total Organic Carbon (mg/l) 13 0 33 0 28.0 9.8 8 9 9.2 13 0 Total Organic Halogen ugCl/l 6 0 32 0 28 0 14.0 8 0 5 0 17 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 557.0 556 0 535 0 581 0 555 0 457 0 561 0 Bicarbonate Alkalinity 557 0 556.0 535 0 581.0 555 0 457 0 561 0 Carbonate Alkalinity < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .004 .002 < .020 < .002 004 003 003 BariLin (Ba) .170 .110 .150 .140 .150 150 140 Cadmiun (Cd) < .002 < .002 < .002 < .002 < .009 < 009 < .004 Chromium Hex (Cr+6) < .010 < .010 < .010 < .010 < 010 < .010 < 010 Total Chromium (Cr) < .005 < .005 . < .005 < .005 < 005 < 005 < 005 Lead (Pb) < .025 < 025 < .025 < 025 < 030 < 030 < 025 Manganese (Mn) 110 092 .100 100 110 110 100 Mercury (Hg) < .0003 < .0002 < 0002 < 0002 < 0002 < 0002 < .0001 Nickel (NO < .010 < .010 < .010 < .010 < .006 < .006 < 010 Seleniun (Se) < 002 < .020 < .020 < .030 < 002 < 002 < .002 Silver(Ag) < 003 < 003 < .003 < 005 < 003 < 003 040 Vanadiun (V) < .002 < .002 < .002 < 002 < 005 < .005 < .002 Zinc (Zn) < .004 .005 < 004 < 004 < 004 < .004 < 004 <- Parameter value is less than given detection limits * Parameter was not analyzed TABLE 14 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION D-10 DATE SAMPLED 4-30-86 D-10 10-29-86 D-10 4-21-87 D-10 10-27-87 D-10 4-26-88 D-10 10-31-88 D- 4- 10 27-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) 33.0 34.0 34 0 32 0 36.0 32 0 35 0 Magnesiun (Mg) 23 0 23 0 23 0 23.0 23 0 23 0 23 0 Sodiun (Na) 236 0 240 0 242.0 233.0 247 0 234 0 249 0 Potassiun (K) 39.0 40 0 40 0 40 0 40 0 38 0 41 0 Bicarbonate (HC03) 677 9 710 8 687 7 714.5 647 4 777 9 685 2 Carbonate (COS) < 3.0 < 3.0 < 3.0 < 3.0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 .0 Chloride (Cl) 152.0 171.0 161.0 170.0 166 0 169 0 160 0 Fluoride (F) .80 .90 .90 .80 .80 .80 .90 Sulfate (S04} < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 < .1 < 2.0 < 1 < 1 Organic Nitrogen (as N) < .1 .6 < .1 < 1.0 1.3 < 1 < 1 0 Ammonia (as N) 11 5 12 0 12 0 11.0 9 7 11 0 11 0 Sulfide < .05 .05 .12 < OS < .05 < .05 05 Total Cyanide < .01 < 01 < .01 ( < .01 < .01 < 01 < 01 FIELD MEASUREMENTS Field pH 7 66 7.62 7.42 7 47 7 46 7 44 7 42 Sp Conductance (urhos/cm) 1425 0 1600 0 1400 0 1600 0 1600 0 1920 0 1850 0 OTHER PARAMETERS Lab pH (units) 8 13 7 11 7 64 7.65 8 00 7 60 7.60 Lab Conductivity (unhos/cm) 1610 0 1540 0 1560 0 1640.0 1530 0 1410 0 1470 0 Total Suspended Solids(mg/l)< 10.0 < 5 0 < 2.0 < 3.0 2.0 24 0 < 2.0 Total Dissolved Solids(mg/l) 840.0 820.0 1070 0 950 0 880 0 880 0 880 0 Oil & Grease (mg/l) < .5 < .5 < 1.0 < 1.0 < 1.0 < 1.0 1.0 Total Organic Carbon (mg/l) 21.0 10 0 8.5 9.3 11.0 8 8 8 6 Total Organic Halogen ugCl/l 57.0 51.0 61.0 25.0 17.0 31 0 22 0 ALKALINITIES as ii«/l CaC03 Total Alkalinity 556 0 583 0 564 0 586 0 531.0 638 0 562 0 Bicarbonate Alkalinity 556.0 583 0 564 0 586 0 531 0 638 0 562 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 < S.O < 5.0 < 5 0 < 5 0 TRACE METALS (fig/1) Arsenic (As) .002 .003 < .006 < .003 < .003 003 003 Bariun (Ba) .130 140 .150 .140 150 140 150 CadmiLin (Cd) < .004 < 004 < 005 < 005 < .005 < .005 < .005 Chromium Hex (Cr+6) < 010 < 010 < .010 < .010 < .0"-.020 < 010 Total Chromiun (Cr) < 005 < .005 < .005 < .010 < 010 < 010 < 010 Lead (Pb) < .020 < 020 < .002 < 002 < .002 < .002 .002 Manganese (Mn) 100 100 100 .100 110 100 110 Mercury (Hg) < .0001 < 0001 < 0001 < .0001 < 0001 < .0001 < 0001 Nickel (NO < .010 < 010 < .040 < .040 < 040 < .040 < 040 Selenium (Se) < .002 < 010 < 008 < 008 < 002 < .002 < 002 Silver(Ag) < 003 < .003 < .005 < .050 < 005 < 005 < 005 Vanadium (V) < 002 < .002 < 010 < 010 < 010 < .010 < 010 Zinc (Zn) 012 .014 < .010 < .010 < 010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 14 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-10 D-10 D-10 DATE SAMPLED 10-27-89 4-24-90 10-24-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 34 0 32 8 34.0 Magnesiun (Ng) 23 0 21.4 23.1 Sodiun (Na) 242 0 242.0 224.0 Potassiun (K) 38 0 40.0 36 7 Bicarbonate (HC03) 664.5 708.4 685.2 Carbonate (COS) < 3.0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 168.0 157 0 167.0 Fluoride (F) .80 .93 .80 Sulfate (S04) < 5.0 < 5 0 < 5.0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) < .1 < .1 < .1 Organic Nitrogen (as N) 1.0 < 5.0 < 5 0 Airmonia (as N) 12.0 10.7 11 1 Sulfide < .05 < .05 .09 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7.38 7.51 7 55 Sp Conductance (urhos/cm) 1400 0 1650.0 1400 0 OTHER PARAMETERS Lab pH (units) 7.60 7.70 7.60 Lab Conductivity (unhos/cm) 1280 0 1390 0 1520 0 Total Suspended Solids(mg/l)< 3 0 77 2 5.2 Total Dissolved Solids(mg/l) 900.0 894 0 888.0 Oil t Grease (mg/l) 1.0 27.5 1.5 Total Organic Carbon (mg/l) 8 7 9 6 8 7 Total Organic Halogen ugCl/l 30 0 < 30 0 < 30 0 ALKALINITIES as mg/l CaC03 Total Alkalinity 545.0 581 0 562 0 Bicarbonate Alkalinity 545 0 581.0 562 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 TRACE METALS (mg/l) Arsenic (As) < .005 < .005 < .005 Barium (Ba) .150 120 .130 Cadmiun (Cd) < .005 < .005 < .005 Chromium Hex (Cr+6) < .010 < 010 < .010 Total Chromiun (Cr) < .010 < .010 < 010 Lead (Pb) < 010 < .005 .006 Manganese (Mn) .110 .092 .100 Mercury (Hg) < 0002 < .0002 < .0002 Nickel (NO < .040 < 040 < 040 Selenium (Se) < 005 < 005 < 005 Silver(Ag) < .010 < .010 < 010 Vanadiun (V) < 010 < .010 < .010 Zinc (Zn) < .010 < .010 < .010 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 14 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-10 D-10 D-10 D-10 D-10 D-10 D 10 DATE SAMPLED 7-13-84 8-24-84 9-25-84 10-25-84 1-31-85 4-24-85 10-30-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Chloroform < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 n-Xylene < 5 0 < S.O < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Xylenes,Total * * • • • • • BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Naphthalene < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) f o-Cresol < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < S 0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone 37.0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100.0 < 100 0 < 100 0 Aniline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate 7.0 < 5 0 12 0 < 5 0 19.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 20 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ol-n-octylphthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5.0 < 5.0 ' < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 t Parameter value is less than given detection limits * Parameter was not analyzed TABLE 14 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION 0-10 D-10 0-10 0-10 D-10 D-10 D 10 DATE SAMPLED 4-30-86 10-29-86 4-21 -87 10-27-87 4-26-88 10-31 -88 4-27-89 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5.0 < 10,0 < 5.0 < 5 0 < 5 0 Chloroform < 5.0 < 5 0 < 5,0 < 10,0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10.0 < 20 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5 0 < 5 0 < 5 0 < 10 0 < 5.0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5 0 < 5.0 < 5 0 < 10 0 < 5.0 < 5 0 < 5 0 n-Xylene < 5.0 < 5 0 < 5 0 < 10 0 < 5 0 * * o,p-Xylene < 5 0 < 5 0 < 5 0 < 10 0 < 5 0 * * Xylenes,Total * * * • * < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < 5 0 < S.t) < S.O < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10.0 < 25 0 < SO 0 < 25 0 < 25 0 < 25 0 Acetonitn le < 100 0 < 100 0 < 100.0 < 200 0 < 100 0 < 100 0 < 100 0 Aniline < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 * • * * * Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 < 5 0 6 4 < 5 0 < 5 0 2*Butanone < 10.0 < 10 0 < 10 0 < SO 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 1 < 5 0 < 5 0 < 10 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 5 < 25 0 < 25 0 < 25 0 2,4-0imethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 20 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10 0 < 10 0 < 10 0 < 20 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5,0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits *. Parameter was not analyzed SAMPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) ' TABLE 14 CHEVRON SEMI-ANNUAL SAMPLE DATA D-10 10-27-89 D-10 4-24-90 D-10 10-24-90 Benzene < 5.0 < 5 0 < 5 0 Chloroform 51 0 < 5.0 < 5 0 Cyclohexane (2) < 10 0 * • Ethylbenzene < 5 0 < 5.0 < 5 0 Toluene < 5 0 < 5.0 < 5 0 1,1,1-Tnchloroethane < 5 0 < 5 0 < 5.0 m-Xylene * * • o,p-Xylene • • • Xylenes,Total < 5 0 < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene Naphthalene ACID COMPOUNDS (ug/l) o-Cresol »+p-Cresol Phenol 5 0 5 0 S 0 5 0 5 0 5 0 5.0 5 0 5 0 5 0 5.0 5.0 S.O 5 0 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 < 10.0 Acetonitrile (1) < 100 0 * • Aniline < 5 0 < 5 0 < 5 0 Benzenethiol (4) * • • Bis(2-ethylhexyl)phthalate < 5 0 < 5.0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5.0 < 5,0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5,0 < 5 0 DI-n-octylphthalate < 5 0 < 5,0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 • • 1-Methylnaphthalene (3) < 5 0 • * 2-Methylnaphthalene < 5.0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) . Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) . Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 15 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D- DATE SAMPLED 7- 11 13-84 D-11 8-24-84 0-11 9-25-84 D-11 10-25-84 D- 1- 11 31-85 D- 4- 11 25-85 D- 10- 11 31-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) 15.0 16 0 16 0 17.0 16 0 17 0 20 0 Magnesiun (Ng) 6.8 6.4 6 7 7 0 6 9 6 6 7.3 Sodiun (Na) 363.0 330 0 325 0 330 0 350 0 370 0 358 0 Potassiun (K) 31.0 26.0 28 0 27 0 27 0 27 0 29.0 Bicarbonate (HC03) 897.4 888 8 865 7 898 6 897 4 846.2 902 2 Carbonate (COS) < 3 0 < 3 0 < 3 0 < 3 0 < 3.0 19 8 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (Cl) 120 0 124.0 114.0 110.0 103.0 105.0 118 0 Fluoride (F) 1.80 1.80 2.20 2 00 2 00 2 20 2.20 Sulfate (S04) < 5.0 < 5 0 10 0 B.O < 25.0 < 5 0 < S.O MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 < .1 < .1 < .1 < 1 Organic Nitrogen (as N) .7 1.3 1.3 1.2 < .1 .9 1.5 Annonia (as N) 5.3 5.8 5.7 5 0 6 5 6 0 6 0 Sulfide < .05 < .05 < .05 .06 < .05 .06 < .05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 67 7.58 7 79 7.65 7.52 7 84 7.80 Sp Conductance (unhos/cm) 1600 0 2000 0 1700 0 1850 0 2100.0 1800 0 • OTHER PARAMETERS Lab pH (units) 8 09 8.08 8.20 7 54 7.89 7 85 8 00 Lab Conductivity (urtios/cm) 1650 0 1670.0 1670 0 1700 0 1780 0 1690 0 1580 0 Total Suspended Solids(mg/l) 7.0 10 0 < 2 0 17 0 3 0 2,0 3 0 Total Dissolved Solids(mg/l) 1020 0 1080.0 985 0 1050 0 1060 0 1080 0 1030.0 Oil & Grease (mg/l) < 1 0 2 0 < 1 0 < 1 0 < 1 0 1 0 < 1 0 Total Organic Carbon (mg/l) 9 2 28 0 35 0 11 0 14 0 12 0 11 0 Total Organic Halogen ugCl/l 15.0 13 0 48 0 16.0 11.0 < 5 0 9 0 ALKALINITIES as mg/l CaCOS Total Alkalinity 736.0 729.0 710 0 737.0 736 0 727,0 740 0 Bicarbonate Alkalinity 736 0 729 0 710,0 737.0 736 0 694.0 740 0 Carbonate Alkalinity < 5 0 < 5.0 < 5,0 < 5 0 < 5.0 33 0 < 5.0 TRACE METALS (mg/l) Arsenic (As) < 002 .004 < ,002 < .002 003 < 002 < 010 Bariun (Ba) 058 065 ,074 .073 069 076 069 Cadmiun (Cd) < 002 < 002 < ,002 < 002 < .009 < 009 < 004 Chromium Hex (Cr+6) < .010 < .010 < .010 < .010 < .010 < .010 < 010 Total Chromium (Cr) < 005 < 005 .006 < .005 < 005 .006 < .005 Lead (Pb) < .025 < .025 < .025 < .025 < 030 < .030 < 025 Manganese (Mn) .054 062 .069 .074 .069 077 076 Mercury (Hg) < .0003 < .0002 < .0002 < .0002 < 0002 < 0002 < 0001 Nickel (NO < .010 < .010 < .010 < .010 < 006 < .006 < 010 Selenium (Se) < 002 < .020 < 002 < .003 < .002 < 002 < 002 Silver(Ag) < .003 < .003 < .003 < 005 < ,003 < 003 < 003 Vanadiun (V) < .002 < .002 .002 < .002 < 005 < .005 < 002 Zinc (Zn) < .004 < .004 < .004 < .004 < .004 .014 < 004 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 15 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION 0-11 D-11 0-11 D-11 D-11 0-11 D-11 DATE SAMPLED 4-30-86 10-29-86 4-21-87 10-27-87 4-26-88 11-1-88 4-27-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) 16.0 17 0 15 0 16 0 18 0 15 0 16 0 Magnesium (Hg) 6.7 7.2 7.0 7.0 7.3 7 0 7 0 Sodiun (Na) 340.0 350 0 349.0 339.0 360 0 333 0 357 0 Potassiun (K) 27.0 29 0 28 0 28 0 28 0 27 0 28 0 Bicarbonate (HC03) 877.9 951 0 921.8 937.6 886 4 937 6 881 5 Carbonate (COS) < 3.0 < 3 0 < 3 0 < 3.0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 0 Chloride (Cl) 113.0 109 0 118.0 115.0 111.0 111 0 110 0 Fluoride (F) 1.80 2.10 2,20 1.80 2 10 1 90 2 20 Sulfate (S04) < 5.0 < 5 0 < 5,0 < 5.0 < 5.0 < 5 0 < 5 0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) < .1 < .1 < 1 < .1 < 2.0 < 1 < 1 Organic Nitrogen (as N) 1 1 .4 < .1 1 1 2.4 .5 < 1 0 Ammomv (as N) 5 9 6 3 6 3 5 3 5.4 6 3 6 0 Sulfide < .05 .06 11 < .05 < .05 < 05 < 05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 93 7 77 7 65 7.65 7.67 7 69 7 75 Sp Conductance (unhos/cm) 1600 0 1700 0 1600 0 1580 0 1600 0 1800 0 1900 0 OTHER PARAMETERS Lab pH (units) 8 25 7.97 7.85 7.80 7.90 7 90 7.90 Lab Conductivity (unhos/cm) 1730.0 1700.0 1690 0 1580 0 1570.0 1840 0 1580 0 Total Suspended Solids(nig/l) 18.0 11 0 < 2.0 < 3 0 < 2 0 2 0 < 2 0 Total Dissolved Solids(fflg/l) 1010 0 965 0 1300.0 1060 0 1040.0 1050 0 1030.0 Oil t Grease (mg/l) < 5 < 5 < 1 0 < 1,0 1.0 2 0 < 1 0 Total Organic Carbon (mg/l) 60.0 12 0 10 0 11 0 14.0 9.8 10.0 Total Organic Halogen ugCl/l 30 0 61 0 34 0 31 0 31.0 41 0 9 0 ALKALINITIES as llQ/l CaC03 Total Alkalinity 720 0 780 0 756 0 769 0 727.0 769 0 723 0 Bicarbonate Alkalinity 720 0 780 0 756 0 769 0 727.0 769 0 723 0 Carbonate Alkalinity < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < 010 < .002 < .006 < .003 < .003 < 006 < 006 Bariun (Ba) .066 .068 .069 .070 068 .069 073 Cac^ un (Cd) < .004 < .004 < 005 < .005 < .005 005 < 005 Chromium Hex (Cr+6) < 010 < .010 < .010 < .010 < 010 -< 010 < 010 Total Chromiun (Cr) < 005 < .005 .008 < .010 < .010 < 010 < 010 Lead (Pb) < .020 < .020 < 002 < .020 < 002 < .002 .003 Manganese (Mn) 078 .070 .080 .076 069 066 077 Mercury (Hg) < 0001 < 0001 < 0001 < .0001 < 0001 < .0001 < 0001 Nickel (NO < 010 < .010 < .040 < .040 < 040 < 040 < 040 Seleniun (Se) < 002 < 010 < 008 < .010 .002 < 002 < .002 Silver(Ag) .005 < .003 < .005 < .005 < 005 < 005 < 005 Vanadiun (V) .003 < .002 < 010 < .010 < 010 < 010 < .010 Zinc (Zn) .012 .008 < .010 < .010 < .010 < .010 < 010 < Parameter value is less than given detection limits *. Parameter was not analyzed TABLE 15 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION D-11 DATE SAMPLED 10-27-89 D-11 4-27-90 0-11 10-24-90 MAJOR IONS (mg/l except as noted) Calciun (Ca) 16 0 16 2 15.6 Hagnesiun (Mg) 6.6 6.5 6.9 Sodiun (Na) 345 0 357.0 335.0 Potassiun (K) 26.0 28 7 26.4 Bicarbonate (HC03) 864 4 912 0 870.5 Carbonate (COS) < 3.0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 114.0 105.0 109 0 Fluoride (F) 2.10 1.70 1 90 Sulfate (S04) < 5.0 < S.O < 5.0 MINOR IONS (ns/l) Nitrate+Nitrite (as N) < .1 < .2 < .1 organic Nitrogen (as N) 26 0 < 2 5 1.1 Annonia (as N) 6.3 5.3 6 0 Sulfide < .05 < .05 .05 Total Cyanide < .01 < .01 < .01 FIELD MEASUREHENTS Field pH 8.00 7.81 7 84 Sp Conductance (urhos/cm) 1400 0 1600.0 1550 0 OTHER PARAMETERS Lab pH (units) 8.00 7.90 7 80 Lab Conductivity (unhos/cm) 1500 0 1380.0 1630 0 Total Suspended Solids(mg/l) 3 0 2 0 < 2 0 Total Dissolved Solids(mg/l) 1050 0 1030 0 1020 0 Oil & Grease (mg/l) 2.0 < 1 0 2 0 Total Organic Carbon (mg/l) 10.0 10 7 10 8 Total Organic Halogen ugCl/l 40 0 < 30.0 < 30 0 ALKALINITIES as mg/l CaCOS Total Alkalinity 709 0 748 0 714 0 Bicarbonate Alkalinity 709 0 748 0 714 0 Carbonate Alkalinity < 5 0 < 5 0 < 5,0 TRACE METALS (mg/l) Arsenic (As) < .005 < .010 < -005 Barium (Ba) .070 .066 .071 Cadmiun (Cd) < .005 < .005 < .005 Chromiun Hex (Cr+6, < .010 < .010 < .010 Total Chromiun (Cr) < .010 < .010 < .010 Lead (Pb) < .010 < .005 009 Manganese (Mn) .080 .067 077 Mercury (Hg) < 0002 < .0002 < 0002 Nickel (Ni) < .040 < .040 < .040 Seleniun (Se) < .005 < .010 < .010 Silver(Ag) < .010 < .010 < .010 Vanadium (V) < 010 < 010 < 010 Zinc (Zn) < .010 < .010 < .010 <. Parameter value is less than given detection limits * Parameter was not analyzed TABLE 15 CHEVRON SEMI-ANNUAL SAHPLE DATA SAMPLE IDENTIFICATION D-11 0-11 0-11 D-11 D-11 D-11 D-11 DATE SAMPLED 7-13-84 8-24-84 9-25-84 10-25-84 1-31 -85 4-25 •85 10-31 -85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform < 5 0 < 5 0 < 5.0 < S.O < 5 0 5 0 •< 5 0 Cyclohexane < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Tnchloroethane < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 n-Xylene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 o,p-Xylene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Xylenes,Total * • • • • • * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < S.t < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Naphthalene < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) O-Cresol < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 20 0 < 10 0 < 10 0 20 0 < 10 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Aniline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 33 0 99 0 11.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Carbon Disulfide < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Oifflethylphenol < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ol-n-octylphthalate < 5 0 < 5 0 < 5.0 5.0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < J 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 e Parameter value is less than given detection limits * Parameter was not analyzed TABLE 15 (CONTINUED) CHEVRON SEMI-ANNUAL SAHPLE DATA SAMPLE IDENTIFICATION D-11 D-11 D-11 D-11 D-11 D-11 D-11 DATE SAHPLED 4-30-86 10-29-86 4-21-87 10-27-87 4-26-88 11- 1 -88 4-27-89 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene < 5 0 < 5.0 5 0 < 10.0 < 5.0 < 5 0 < 5 0 Chloroform < S.O < 5.0 < 5 0 < 10.0 < 5.0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10 0 < 20.0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5.0 < S.O < 10.0 < 5.0 < 5.0 < 5 0 Toluene < 5.0 < 5.0 < 5.0 < 10 0 < 5.0 < 5 0 < 5 0 1,1,1-Tr{chloroethane < 5.0 < 5.0 < S.O < 10.0 < 5 0 < S.O < 5 0 m-Xylene < 5 0 < 5.0 < S.O < 10.0 < S.O • • o,p-Xylene < 5.0 < 5.0 < 5.0 < 10.0 < 5 0 * • Xylenes,Total • • * * • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5 b < 5.0 < S.O < 5.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < S 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5,0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5,0 < 5.0 < 5.0 < 5,0 < 5.0 < 5.0 < 5 0 Acetone < 10 0 < 10.0 < 25 0 < 50.0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100.0 < 100.0 < 100 0 < 200 0 < 100 0 < 100.0 < 100 0 Am line < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 * • * • • Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5.0 < S.O < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < so 0 < 25.0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5.0 < 10 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10,0 < 50 0 < 25.0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5,0 < 5.0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5,0 < 5.0 < 5 0 < 5 0 < 5,0 2-Hexanone < 10.0 < 10.0 < 10 0 < 20.0 < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene < 5.0 < 5.0 < 5 0 < S.O < 5.0 < 5,0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaph thaIene < 5.0 < 5.0 < 5,0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 G < 5 0 4-Methyl-2-pentanone < 10 0 < 10.0 < 10,0 < 20 0 •< 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5.0 < 5,0 < 5 0 < 5 0 < 5 0 < 5.0 (4)- Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits *. Parameter was not analyzed TABLE 15 CHEVRON SEMI-ANNUAL SAHPLE DATA SAHPLE IDENTIFICATION DATE SAMPLED ORGANIC COMPOUNDS VOLATILES (ug/l) D-11 10-27-89 0-11 4-27-90 0-11 10-24-90 Benzene < 5 0 < 5.0 < 5.0 Chl or of om < S.O < S.O < 5.0 Cyclohexane (2) < 10 0 * * Ethylbenzene < S 0 < 5.0 < 5.0 Toluene < S.O < 5 0 < 5 0 1,1,1-Tr1chIoroethane < S.O < S.O < 5.0 n-Xylene • • • o,p-Xylene * • • Xylenes,Total < S.O < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5 0 < 5 0 < 5.0 Naphthalene < 5 0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) O-Cresol < 5.0 < 5.0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5 0 Acetone < 10.0 < 10 0 < 10 0 Acetonitrile (1) < 100 0 * * Aniline < 5 0 < 5 0 < 5.0 Benzenethiol (4) • * • Bis(2-ethylhexyl)phthalate < 5.0 76 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane < 5.0 < 5 0 < 5 0 2,4-Diinethylphenol < 5 0 < 5 0 < 5,0 Di-n-octylphthalate < 5 0 < 5.0 < 5.0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5 0 < 5 0 3-Methyleholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * * 1-Hethylnaphthalene (3) < 5 0 * • 2-Hethylnaphthalene < •? 0 < 5 0 < 5 ' 4-Hethyl-2-pentanone < lu.O < 10 0 < 10 0 Pentach1orophenoI < 5.0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) * Identification of this compound is by laboratory reference mass spectrLRi onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrum, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270. < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 16 SAHPLE IDENTIFICATION D-35 DATE SAMPLED 7-16-84 CHEVRON SEMI D-35 8-14-84 -ANNUAL SAHPLE D-35 9-17-84 DATA 0-35 10-17-84 0-35 2- 1-85 D-35 4-29-85 D- 10- 35 29 85 MAJOR IONS (mg/l except as noted) 138 0 Calciun (Ca) 172.0 159.0 161 0 165 0 150 0 150 0 138 0 Magnesiun (Mg) 43 0 39.0 42 0 42 0 43 0 38 0 35 0 Sodiun (Na) 130 0 120.0 130.0 140.0 130 0 150,0 140 0 Potassiun (K) 10 0 8 9 9 4 10 0 7.7 8,0 8 0 Bicarbonate (HC03) 395 0 382 8 407.2 414 5 399 9 381 6 387 7 Carbonate (COS) < 3.0 < 3.0 < 3.0 < 3.0 < 3 0 10 8 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 .0 Chloride (Cl) 220 0 224.0 233.0 232.0 227 0 215 0 224 0 Fluoride (F) < .10 .40 .50 .40 .20 .30 30 Sulfate (S04) 206.0 220 0 246.0 242.0 230 0 242 0 252 0 MINOR IONS (mg/l) .1 1 Nitrate+Nitrite (as N) < .1 .1 < .1 < .1 < .1 < .1 < 1 Organic Nitrogen (as N) < .1 .1 5 .2 < .1 .3 5 Annonia (as H) .1 .1 < 1 < .1 .1 1 2 Sulfide < .05 < 05 < 05 < .05 < .05 < .05 < 05 Total Cyanide < .01 < 01 < .01 < .01 < .01 < .01 < 01 FIELD MEASUREMENTS Field pH 7 20 7 14 7.25 7.38 7 24 7.29 7 23 Sp Coixluctance (unhos/cm) 1700.0 1700.0 1800.0 1900 0 2200 0 2000 0 * OTHER PARAMETERS Lab pH (units) 7.36 7.39 7.38 7.24 7 28 7 28 7 68 Lab Conductivity (urhos/cm) 1650.0 1680.0 1680.0 1680.0 1660 0 1690 0 1560 0 Total Suspended Solids(mg/l)< 2 0 5.0 < 2.0 < 4.0 2 0 4.0 < 2 0 Total Dissolved Solids(mg/l) 1140 0 1160.0 1060.0 1060 0 1110 0 1130 0 1040 0 Oil & Grease (mg/l) < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1 0 Total Organic Carbon (mg/l) 1.6 2.0 5 0 2 0 2 1 1.7 2 2 Total Organic Halogen ugCl/l 11.0 13 0 14 0 24 0 < 5 0 8 0 < 5 0 ALKALINITIES as n^/l CaCOS Total Alkalinity 324 0 314 0 334 0 340,0 328 0 332 0 318 0 Bicarbonate Alkalinity 324 0 314 0 334 0 340 0 328 0 313 0 318 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 18 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < 002 < .002 .004 < .002 .003 < 002 < 002 Bariun (Ba) .093 .088 085 .083 .080 078 061 Cadmiun (Cd) < .002 < .002 < 002 < .002 < .009 < .009 < 004 Chromium Hex (Cr+6) < .010 < 010 < .010 < .010 < 010 < .010 < .010 Total Chromiun (Cr) < .005 .006 < 005 < 005 < .005 < 005 < 005 Lead (Pb) < .025 < .025 < .025 < .025 < 030 < .030 < 025 Manganese (Mn) 140 .140 130 130 130 130 110 Mercury (Hg) < 0003 < 0002 < .0002 < 0002 < 0002 < 0002 < 0001 Nickel (NO < 010 < 010 < .010 < 010 < 006 < 006 < 010 Selenium (Se) < 020 < .020 < 020 < 030 < .002 < 002 < 002 Silver(Ag) < .003 < .003 < 003 < .005 < 003 < 003 < 003 Vanadium (V) < .002 < 002 < .002 < .002 < .005 < .005 < 002 Zinc (Zn) < .004 .032 .036 < .004 < .004 < .004 .061 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 16 (CONTINUED) CHEVRON SEHI-ANNUAL SAHPLE DATA SAHPLE IDENTIFICATION D-35 DATE SAHPLED 5- 2-86 D-35 10-30-86 0-35 4-20-87 D-35 10-28-87 0-35 4-27-88 D- 11- 35 2-88 D- 5 35 1-89 MAJOR IONS (mg/l except as noted) Calciun (Ca) 135 0 140.0 129 0 126.0 129.0 117.0 128.0 Magnesium (Mg) 35 0 36.0 33 0 52 0 32.0 31 0 33 0 Sodiun (Na) 150.0 161.0 149.0 150.0 149.0 131 0 144 0 Potassiun (K) 8 0 9.0 8 0 8 0 8 0 7.0 8 0 Bicarbonate (HC03) 392.6 476 7 409 7 417.0 413 3 424.3 404 8 Carbonate (COS) < 3 0 < 3.0 < 3.0 < 3 0 < S.O < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 0 Chloride (Cl) 147.0 174.0 166.0 144.0 168.0 152.0 149 0 Fluoride (F) .30 .30 .30 .30 .30 .30 40 Sulfate (S04) 223.0 217.0 22S.0 196.0 208.0 221 0 215 0 MINOR IONS (mg/l) Nitrate+Hitrite (as N) < .1 < .1 < .1 < .1 < 2 0 < 1 < 1 Organic Nitrogen (as N) .5 < .1 .8 < .1 < .2 < .2 < 1 Annonia (as N) .2 .2 .1 .1 .2 .2 1 Sulfide < .05 < .05 < .05 < .05 < .05 < .05 < 05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7.55 7.37 7 15 7 40 7.34 7.18 7 31 Sp Conductance (urhos/cm) 1500 0 1600 0 1450 0 1550 0 1800 0 1650 0 1600 0 OTHER PARAMETERS Lab pH (units) 7 74 7 90 7 45 7.54 7.60 7 40 7 60 Lab Conductivity (unhos/cm) 1620.0 1540 0 1530 0 1440.0 1390.0 1710 0 1280 0 Total Suspended Solids(fflg/l)< 10 0 3 0 3 0 < 2.0 4.0 < 2 0 < 10 0 Total Dissolved Solids(mg/l) 990 0 910.0 940 0 930 0 921.0 910 0 916 0 Oil 1. Grease (mg/l) < .5 < .5 < 1.0 < 1.0 1.0 < 1 0 < 1.0 Total Organic Carbon (mg/l) 3 5 1.5 1 2 1.5 1.5 2.9 1 1 Total Organic Halogen ugCl/l 9 0 12 0 26 0 15 0 13.0 34 0 < 5 0 ALKALINITIES as mg/l CaCOS Total Alkalinity 322 0 391 0 336 0 342 0 339 0 348 0 332 0 Bicarbonate Alkalinity 322.0 391.0 336 0 342 0 339 0 348 0 332 0 Carbonate Alkalinity < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALS (n«/l) Arsenic (As) < .002 .008 < .006 < .003 < .030 < .003 < 003 Barium (Ba) .063 .058 .061 .065 .061 .057 .060 Cadmiun (Cd) < .004 < .004 < 005 < .005 < .005 < 005 < 005 Chromium Hex (Cr+6) < .010 < .O'l. < .010 < .010 < 010 < .010 < 010 Total Chromiun (Cr) < .005 < .005 < .005 < .010 < 010 < .010 < 010 Lead (Pb) < .020 < .020 < .002 < .002 < .002 < 002 < 002 Manganese (Hn) 120 120 120 .120 .120 110 120 Hercury (Hg) < 0001 < .0001 < 0001 < .0001 < 0001 < 0001 < 0001 Nickel (NO < 010 < .010 < 040 < .040 < .040 < .040 < .040 Seleniun (Se) < .004 < .010 < .008 < .004 < .004 < .000 < .002 Silver(Ag) 003 < .003 < 005 < 005 < .005 < .005 < 005 Vanadium (V) < .002 < 002 < 010 < .010 < 010 < 010 < 010 Zinc (Zn) .014 .020 < 010 < 010 < 010 < .010 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 16 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION DATE SAHPLED D-35 11- 1-89 D-35 4-25-90 MAJOR IONS (mg/l except as noted) 0-35 10-26-90 Calciun (Ca) 127.0 124 0 125 0 Hagnesiun (Hg) 31.0 30 7 32 0 Sodium (Na) 158 0 142 0 137,0 Potassium (K) 9 0 8 2 7.7 Bicarbonate (HC03) 398 7 409 7 395.0 Carbonate (COS) < 3 0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 147 0 143.0 129.0 Fluoride (F) .30 .22 .28 Sulfate (S04} 206 0 201.0 196 0 MINOR IONS (RS/l) Nitrate+Nitrite (as N) < .1 < .1 < .1 Organic Nitrogen (as N) < .5 < .5 < .5 Airmonia (as N) < .1 .2 < .2 Sulfide < .05 < .05 < .05 Total Cyanide .02 < .01 < .01 FIELD MEASUREMENTS Field pH 7.28 7.40 7.38 Sp Coixluctance (urhos/cm) 1400 0 1600 0 1400 0 OTHER PARAMETERS Lab pH (units) 7.70 7.70 7.70 Lab Conductivity (unhos/cm) 1200 0 1210 0 1220 0 Total Suspended Solids(nig/l)< 2 0 < 2.0 2 0 Total Dissolved Solids(mg/l) 900 0 917.0 865 0 Oil & Grease (mg/l) 3.0 1.8 < 1.0 Total Organic Carbon (mg/l) 1.7 2 6 1 8 Total Organic Halogen ugCl/l< 30.0 < 30 0 < 30 0 ALKALINITIES as ng/{ CaCOS Total Alkalinity 327.0 336 0 324 0 Bicarbonate Alkalinity 327 0 336 0 324 0 Carbonate Alkalinity < 5.0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) < 005 < 005 < .010 Barium (Ba) 060 055 052 Cadmiun (Cd) < .005 < .005 < 005 Chromiun Hex (Cr+6) < 010 < 010 < .010 Total Chromium (Cr) < .010 < 010 < .010 Lead (Pb) < .005 < 005 < 010 Manganese (Mn) 100 100 .095 Mercury (Hg) < .0002 < .0002 < 0002 Nickel (NO < 040 < .040 < .040 Seleniun (Se) < .005 < .010 < .010 Silver(Ag) < 010 < .010 < 010 Vanadiun (V) < .010 < .010 < .010 Zinc (Zn) < 010 < .010 < .010 Parameter value is less than given detection limits Parameter was not analyzed SAHPLE IDENTIFICATION DATE SAMPLED D-35 7-16-84 TABLE 16 CHEVRON SEMI-ANNUAL SAHPLE DATA D-35 8-14-84 D-35 9-17-84 0-35 10-17-84 D-35 2- 1-85 D-35 4-29-85 D-35 10 29-85 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene Chloroform Cyclohexane Ethylbenzene Toluene 1,1,1-Tri chloroethane m-Xylene o,p-Xylene Xylenes,Total BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene Naphthalene ACID COMPOUNDS (ug/l) 0- Cresol m+p-Cresol Phenol OTHER DETECTED ORGANICS (ug/l) Acenaphthene Acetone Acetonitrile Am line Benzenethiol (4) Bis(2-ethylhexyl)phthalate 2-Butanone Carbon Disulfide Oichloromethane 2,4-Dimethylphenol DI-n-octylphthalate 2- Hexanone Indene 3- Hethylcholanthrene Hethyl mercaptan 1- Hethylnaphthalene 2- Methylnaphthalene 4- Methyl-2-pentanone Pentachlorophenol Ouinoline < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 * • • * * * • < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < S.O < 5.0 < 5 0 < 5 0 < S.O < S.O < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 100 0 < 100.0 < 100 0 < 100 0 < 100 0 < 100 0 < 100.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 110 0 40 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 10 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 10 0 < 10 0 < 10 < 10 0 < 10 0 < 10 0 < ^ ,10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 16 (CONTINUED) CHEVRON SEHI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION 0-35 0-35 D-35 D-35 D-35 D-35 D 35 DATE SAMPLED 5- 2 -86 10-30-86 4-20-87 10-28-87 4-27-88 11-2-88 5-1-89 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 Cyclohexane < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < S.O < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 1,1,1-Tnchloroethane < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 n-Xylene < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 • • o,p-Xylene < S 0 < 5 0 < 5 0 < 5.0 < 5.0 * • Xylenes,Total • • • • • < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 Nap 1 thaIene < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 m+p-Cresol < 5.0 < 5 0 < 5.0 < .1 < 5 0 < 5 0 < 5 0 Phenol < S.O < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 360 0 < 25 0 < 25.0 < 25 0 < 25 0 Acetonitn le < 100 0 < 100 0 < 100 0 < 100 0 < 100.0 < 100 0 < 100 0 Am line < 5 0 < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 • * * * * Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 < 25 0 < 25.0 < 25.0 < 25 0 Carbon Disulfide < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 DI-n-octylphthalate < 5.0 < 5.0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Methyl mercaptan < 20.0 < 20.0 < 20 0 < 20.0 < 20.0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 I- rlethyI-2-pentanone < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 PentachIorophenoI < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 16 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION D-35 D-35 D-35 DATE SAMPLED 11- 1 -89 4-25-90 10-26-90 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene < 5 0 < 5 0 < 5 0 Chloroform < 5.0 < 5.0 < 5 0 Cyclohexane (2) < 10.0 • • Ethylbenzene < 5 0 < 5.0 < 5 0 Toluene < 5.0 < 5.0 < 5.0 1,1,1-Trichloroethane < 5.0 < S.O < 5.0 n-Xylene * • * o,p-Xylene • * • Xylenes,Total < S.O < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) 0-Cresol < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone < 10.0 < 10 0 < 10 0 Acetonitrile (1) < 100.0 * * Aniline < 5 0 < 5.0 < 5.0 Benzenethiol (4) * • * Bis(2-ethylhexyl)phthalate < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5.0 < 5 0 Oichloromethane < 5 0 < 5 0 8 1 2,4-Dimethylphenol < 5 0 < 5.0 < 5 0 Di-n-octylphthalate < 5.0 < 5.0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5.0 < 5.0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 • • 1-Methylnaphthalene (3) < 5.0 • • 2-Hethylnaphthalene < 5 0 < S.O < 5 0 4-Hethyl-2-pentai ,«ie < 10 0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5.0 < 5.0 (1) Identification of this compound is by laboratory reference mass spectrum onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, guanritation is an estiaate, but IS within 10X of the true value (4) Not consistently recovered using netho 8240/8270 < Parameter value I* lenii ttinn given detection limits *. Parameter was not analyzed TABLE 17 CHEVRON SEHI-ANNUAL SAHPLE DATA SAMPLE IDENTIFICATION UU-1 WU-1 wu •1 UU-1 uu -1 uw •1 UU -1 DATE SAHPLED 0- 0-0 0- 0- 0 10-5-84 11- 1-84 2-14-85 5-7-85 11-14-85 HAJOR IONS (mg/l except as noted) Calciun (Ca) * • 148 0 146 0 170 0 160 0 131 0 Magnesiun (Mg) * * 44 0 48 0 49 0 52.0 46 0 Sodiun (Na) * * 485 0 490 0 632 0 590 0 490 0 Potassiun (K) • • 28 0 28 0 35 0 32 0 27 0 Bicarbonate (NCOS) • * 336 5 357.2 335 3 348 7 364 6 Carbonate (COS) • * < 3.0 < 3 0 < 3.0 < 3 0 < 3.0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 .0 Chloride (Cl) • • 620 0 870 0 1060.0 1030 0 790.0 Fluoride (F) * • 1.50 .70 1 10 1.10 40 Sulfate (S04) * • 282 0 292 0 375 0 420 0 266 0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) * * 1 1 1.8 .4 1.4 ,4 Organic Nitrogen (as N) * • 2 6 8.5 5.5 2 7 4 0 Annonia (as N) * * 6 6 8 5 7.5 7 4 9,0 Sulfide * * < .05 < .05 < .05 < .05 < .05 Total Cyanide • • .03 .04 < .01 < 01 < .01 FIELD MEASUREHENTS Field pH * • 7 44 7.88 7.81 7 73 8 04 Sp Conductance (unhos/cm) • * 2700 0 3500 0 3600 0 4500 0 3000 0 OTHER PARAMETERS Lab pH (units) * • 7 55 7 93 7.68 7 90 7 64 Lab Conductivity (unhos/cm) * • 3700.0 3660 0 4440.0 4150 0 3370 0 Total Suspended Solids(mg/l) * * 12 0 127 0 11 0 17 0 17 0 Total Dissolved Solids(mg/l) * • 2040 0 2210 0 2580 0 2650 0 2070 0 Oi 1 & Grease (mg/l) * • 3 0 1 0 2.0 3 0 1 0 Total Organic Carbon (mg/l) • * 40 0 10 0 21 0 16 0 19 0 Total Organic Halogen ugCl/l * • 280 0 380 0 110 0 100 0 75 0 ALKALINITIES as mg/l CaCOS Total Alkalinity • * 276 0 293.0 275 0 286 0 299 0 Bicarbonate Alkalinity • * 276 0 293 0 275 0 286 0 299 0 Carbonate Alkalinity • * < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 TRACE METALS (mg/l) Arsenic (As) * * .005 .010 005 .017 010 Banun (Ba) * * .058 .054 .050 .048 .055 Cadmiun (Cd) * • < .002 < .002 < 002 < 002 < 004 Chromiun Hex (Cr+6) * * < .010 < .010 < 010 .020 < 010 Total Chromium (Cr) * * .009 .008 008 038 ,005 Lead (Pb) * * < 025 < .025 < 025 < .025 < 025 Manganese (Mn) * * .053 .059 .076 .063 069 Hercury (Hg) * * < .0002 < .0002 < 0002 < 0002 < 0001 Nickel (NO • * .040 .010 025 010 034 Selenium (Se) * * < .020 < 030 < 002 < 002 < 002 SiIver(Ag) * * < .003 < .005 < .003 < 003 < 003 Vanadiun (V) * • .003 .002 < 002 .002 003 Zinc (Zn) * * .046 .047 .039 .036 041 Parameter value is less than given detection limits Parameter was not analyzed TABLE 17 (CONTINUED) CHEVRON SEHI -ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION UU -1 UU-1 UU-1 UU-1 UU-1 UU •1 DATE SAMPLED 5-12-86 11- 4-86 5- 5-87 11-16-87 5-4-88 11-4-88 MAJOR IONS (mg/l except as noted) Calcium (Ca) 130 0 180.0 172 0 137.0 130 0 129 0 Magnesium (Mg) 56,0 51.0 51.0 39.0 39.0 38 0 Sodium (Na) 330 0 690 0 667.0 477.0 457 0 498 0 Potassiun (K) 21 0 38 0 34.0 28 0 26.0 30 0 Bicarbonate (HC03) 424 3 328 0 348.7 340.2 318 2 365 8 Carbonate (COS) < 3 0 < 3 0 < 3 0 < 3.0 < 3.0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 Chloride (Cl) 370 0 1250 0 1040 0 736 0 720.0 881 0 Fluoride (F) .70 1.30 .70 .70 1 10 80 Sulfate (S04) 310.0 321.0 273.0 263.0 239.0 245 0 MINOR IONS (n«/l) Nitrate+Nitrite (as N) 3.4 Organic Nitrogen (as N) 1.5 Ammonia (as N) 4 0 Sulfide < .05 Total Cyanide .02 FIELD MEASUREMENTS Field pH 7,96 Sp Conductance (urhos/cm) 2550 0 OTHER PARAMETERS Lab pH (units) Lab Conductivity (unhos/cm) Total Suspended Solids(mg/l)< Total Dissolved Solids(nig/l) OlI I Crease (mg/l) Total Organic Carbon (mg/l) Total Organic Halogen ugCl/l ALKALINITIES as n«/l CaCOS Total Alkalinity 348 0 Bicarbonate Alkalinity 348 0 Carbonate Alkalinity < SO TRACE METALS (mg/l) 1.2 1.6 8 6 11 .02 7 70 6700 0 .9 1.6 6.8 .11 .01 7 14 3100 0 1.6 15.0 10 0 .05 01 7.33 2400.0 1.6 .2 9.8 .09 .02 7 50 3350 0 1 1 1 0 13 0 .05 .02 7,38 3300 0 269 0 269 0 < 5 0 286 0 286 0 5 0 279 0 279 0 5 0 261 0 261 0 5.0 300 0 300 0 5 0 UU-1 5- 8-89 148 44 520 29 236 19 0 0 0 0 5 8 0 854 0 .60 265 0 1 7 1 2 8 2 05 05 7 30 3400 0 8 11 7.90 7.71 7 84 7.80 7 50 8 80 2490 0 4600 0 4270 0 3400 0 3110 0 3770 0 3470 0 10.0 15 0 13 0 9 0 20 0 14 0 5 0 1580 0 2570 0 2560 0 1980 0 1620 0 2000 0 2030 0 2 0 2 0 4.0 < 10.0 6.0 < 1 0 < 4 0 19 0 15 0 14 0 16 0 13.0 14 0 13 0 150 0 107 0 98 0 680.0 110.0 147 0 115 0 227 0 194 0 33 0 Arsenic (As) Oil 010 .008 .007 006 < 003 .010 Banun (Ba) .056 039 .046 .041 045 .049 .046 Cadmiun (Cd) < .004 < 004 < 005 < .005 < ,005 < 005 < .005 Chromium Hex (Cr+6) < .010 < 010 < 010 < .010 < 010 .010 .020 Total Chromium (Cr) < .005 007 < .005 < .010 < ,,010 < 010 < " ,010 Lead (Pb) < 020 < .020 < .002 002 ,,010 < .002 < 002 Hanganese (Hn) .060 056 .070 ,052 ^^071^ 072 059 Hercury (Hg) < 0001 < 0001 < 0001 < 0001 < ,0001 < 0001 < 0001 Nickel (NO < 010 038 .040 < 040 < 040 < 040 < ,040 Selenium (Se) < 004 < 010 < .010 < ,004 < ,004 < 002 < 002 SiIver(Ag) < 003 < 003 < .005 < ,005 < ,005 < 005 < 005 Vanadiun (V) .005 < 002 < .010 < 010 < 010 < 010 < 010 Zinc (Zn) 038 051 .020 060 ,040 .080 < 010 Parameter value is less than given detection limits Parameter was not analyzed TABLE 17 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION UU-1 UU •1 UU •1 PATE SAMPLED 11-3-89 5-4-90 11-7-90 MAJOR IONS (mg/l except as noted) Calcium (Ca) 123.0 134.0 142.0 Magnesiun (Mg) 34.0 41.9 40.4 Sodium (Na) 443.0 540 0 612.0 Potassiun (K) 29.0 28.9 35 4 Bicarbonate (HC03) 353.6 169.5 337 7 Carbonate (COS) < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 622.0 820.0 932 0 Fluoride (F) 1.20 .86 1.00 Sulfate (S04) 245.0 265.0 268.0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 .2 .6 Organic Nitrogen (as N) 2.0 < 5.0 6 0 Annonia (as N) 12.0 12.5 10 8 Sulfide < .05 < .05 < .05 Total Cyanide < .01 .02 .02 FIELD MEASUREMENTS Field pH 7.24 7.19 7.39 Sp Coi^uctance (Lirhos/cm) 2400 0 3200.0 3600 0 OTHER PARAMETERS Lab pH (units) 7.60 7.70 7.80 Lab Conductivity (unhos/cm) 2590.0 3010 0 3450.0 Total Suspended Solids(mg/l)< 2.0 6 4 7.2 Total Dissolved Solids(ing/l) 1660.0 2010.0 2090 0 Oil & Grease (mg/l) 2.0 < 1.0 < 1.0 Total Organic Carbon (mg/l) 32 0 14 8 14 3 Total Organic Halogen ugCl/l 130 0 126 0 147.0 ALKALINITIES as mg/l CaCOS Total Alkalinity 290.0 139 0 277 0 Bicarbonate Alkalinity 290 0 139 0 277 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 TRACE METALS (ng/l) Arsenic (As) .006 < .020 < .005 Bariun (Ba) .050 .046 .048 Cadmiun (Cd) < .005 < .005 < .005 Chromium Hex (Cr+6) < .010 < .010 < .010 Total Chromium (Cr) < .010 < .010 < .010 Lead (Pb) .007 < .010 < .005 Manganese (Mn) 070 .075 081 Mercury (Hg) < 0002 < 0002 < .0002 Nickel (NO < 040 < .040 < 040 Seleniun (Se) < ,010 < .020 .010 Silver(Ag) < 010 < .010 < .010 Vanadiun (V) < 010 < 010 < .010 Zinc (Zn) .050 .054 043 Parameter value is less than given detection limits Parameter was not analyzed TABLE 17 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION DATE SAMPLED UU-1 0- 0- ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene Chloroform Cyclohexane Ethylbenzene Toluene 1,1,1-Tr i chIoroethane n-Xylene o,p-Xylene Xylenes,Total BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene Naphthalene ACID COMPOUNDS (ug/t) 0- Cresol m+p-Cresol Phenol OTHER DETECTED ORGANICS (ug/l) Acenaphthene Acetone Acetonitrile Aniline Benzenethiol (4) Bi6(2-'ethylhexyl)phthalate 2-Butanone Carbon Disulfide Oichloromethane 2,4-Diinethylphenol DI-n-octylphthalate 2- Hexanone Indene 3- Methylcholanthrene Methyl mercaptan 1- Methylnaphthalene 2- Methylnaphthalene j, 4- Methyl-2-pentanone Pentachlorophenol Ouinoline (4) Not consistently recovered using metho 8240/8270 t Parameter value is less than given detection limits * Parameter was not analyzed WU-1 UU-1 WU-1 UU -1 UU-1 UU -1 0 0- 0- 0 10-5-84 11-1-84 2-14-85 5-7-85 11-14-85 • < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 • • < 5 0 8.0 < 5 0 < 5 0 < 5 0 * * < 10 0 < 10.0 < 10.0 < 10 0 < 10 0 * • < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 • • < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 * • < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 * • < 5 0 < S.O < 5,0 < 5 0 < 5 0 • • • • • • • * • < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 * * < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 * • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 • * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 • * < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 • • < 5 0 < 5,0 5.0 < 5 0 < 5 0 • * 10.0 31 0 28 0 37 0 < 10 0 • * < 100.0 < 100,0 < 100 0 < 100 0 < 100 0 * * < 5 0 < 5,0 < 5.0 < 5 0 < 5 0 • * < 10 0 < 10,0 < 10 0 < 10 0 < 10 0 * • 39 0 5 0 44.0 9 0 13 0 • * < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 • * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 • • < 10 0 41 0 < 10 0 < 10 0 < 10 0 * * < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 * * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 * * < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 * * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 * * < 20 0 < 20 0 < 20.0 < 20 0 < 20 0 * • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 • < 5 0 < 0 < 5 0 < 5 0 < 5 0 * • < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 • * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 TABLE 17 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION WU -1 UU-1 UU •1 UU -1 UU-1 UU •1 UU-1 DATE SAMPLED 5-12-86 11- 4 -86 5-5-87 11-16-87 5- 4 -88 11-4-88 5-8-89 ORGANIC COMPOUNDS- VOLATILES (ug/l) Benzene < 5.0 < S.O < 5 0 < S.O < 5.0 < 5 0 < 5 0 Chloroform < 5.0 < S.O < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 1 1,1,1-Trichloroethane < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 n-Xylene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 • « o,p-Xylene < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 • * Xylenes,Total * • • • • < 5 0 < 5 0 SASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < S 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Naphthalene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5.0 < 5.0 < S.O < 5.0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5.0 < S 0 < 5 0 < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 250 0 < 25 0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Aniline < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 * • • • • Bis(2-ethylhexyl)phthalate < 5 0 < 5 0 < 5 0 < 5.0 5 1 < 5 0 < 32 0 2-Butanone < 10 0 < 10 0 < 10 0 31 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25.0 < 25 0 < 25 0 2,4-Dimethylphenol 10 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 3-Methylcholanthrene < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 PentachIorophenoI < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4): Not consistently recovered using metho 8240/8270 t Parameter value is less than given detection limits * Parameter was not analyzed TABLE 17 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION WU •1 WU •1 WU 1 DATE SAMPLED 11-3-89 5-4-90 11-7-90 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene < 5 0 < S.O < 5.0 Chloroform < 5 0 < 5.0 < 5 0 Cyclohexane (2) < 10 0 • • Ethylbenzene < 5 0 < 5.0 < 5 0 Toluene < 5 0 < S.O < 5.0 1,1,1-Tri chIoroethane < S.O < S.O < 5 0 m-Xylene • • • o,p-Xylene * • • Xylenes,Total < 5 0 < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < S.O Naphthalene < 5 0 < 5.0 < 5.0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5.0 < 5 0 Phenol < 5.0 < 5.0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone 49 0 < 10 0 52 0 Acetonitrile (1) < 100.0 * * Aniline < 5.0 < 5.0 < 5 0 Benzenethiol (4) • * • Bis(2^ethylhexyl)phthalate < 5 0 < 5.0 < 5.0 2-Butanone < 10 0 < 10.0 < 10.0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane 17 0 < 5 0 6 2 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthelate < 5 0 < 5 0 < 5 0 2-Hexanone < 10.0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * * 1-Hethylnaphthalene (3) < 5 0 • * 2-HethylnaphthBlene < 5 0 < 5.0 < 5 0 4-Hethyl-2-pentanone < 10.0 < 10 0 < 10 0 Pentachlorophenol < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) Identification of this compound is by laboratory reference mass spectrum onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable. This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by Laboratory reference na spectrum, quantitation is an estimate, but IS within 10X of the true value. (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 18 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION UU-2 UU-2 UU-2 UU-2 UU-2 UU-2 UU 2 DATE SAMPLED 0- 0-0 0- 0- 0 10-5-84 11-1-84 2-14-85 5-7-85 11-14-85 MAJOR IONS (mg/l except as noted) Calciun (Ca) * • 141.0 149.0 151.0 140 0 123 0 Magnesiun (Ng) * • 43 0 48.0 47 0 48 0 44 0 Sodium (Na) * • 446 0 496 0 512 0 470 0 390 0 Potassiun (K) * • 26 0 28 0 29 0 26.0 22 0 Bicarbonate (HCOS) • • 351.1 360 9 341.4 363.3 387 7 Carbonate (COS) * * < 3 0 < 3.0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .V .0 .0 .0 .0 0 Chloride (Cl) • • 728 0 900.0 812 0 805.0 609.0 Fluoride (F) * • 1.30 .80 .70 93 1.30 Sulfate (S04) * * 270 0 296 0 333 0 400 0 250 0 MINOR IONS (n«/l) Nitrate+Nitrite (as N) • * 1.2 1.8 .5 1 6 .5 Organic Nitrogen (as N) « • 1.4 3.7 5.0 2.8 3 6 Annonia (as N) « • 8 6 8.5 8 0 8 6 8 4 Sulfide * • < .05 < .05 < .05 .05 .05 Total Cyanide * * .03 .05 < .01 .02 .02 FIELD MEASUREHENTS Field pH * * 7 47 8.30 7.84 7.36 8 12 Sp. Conductance (urhos/cm) * * 2900 0 3600 0 2300 0 2750.0 2300 0 OTHER PARAHETERS Lab pH (umts) * • 7.59 7.92 7 90 8.01 7.69 Lab Conductivity (unhos/cm) • • 3390.0 3780.0 3800.0 3490.0 2820 0 Total Suspended Solids(mg/l) • * 16 0 54.0 13 0 8 0 89 0 Total Dissolved Solids(mg/l) * * 1870 0 2270.0 2190 0 2200 0 1760 0 Oil t Grease (n«/l) * * 4.0 2.0 2.0 3 0 < 1 0 Total Organic Carbon (mg/l) • * 39 0 16 0 19 0 14 0 18 0 Total Organic Halogen ugCl/l • • 260 0 400 0 110 0 100 0 120.0 ALKALINITIES as n«/l CaCOS Total Alkalinity • • 288 0 296 0 280 0 298 0 318 0 Bicarbonate Alkalinity • * 288 0 296 0 280.0 298 0 318 0 Carbonate Alkalinity * • < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 TRACE METALS (n«/l) Arsenic (As) • • 006 .010 .005 .018 010 Barium (Ba) * * .053 .056 .047 .045 049 Cadmium (Cd) * • < .002 < .002 < .002 < .002 < 004 Chromiun Hex (Cr+6) * * < .010 < .010 < 010 .016 < 010 Total Chromiun (Cr) * • .009 Oil .006 040 < 005 Lead (Pb) * • < .025 < .025 < .025 < 025 < .025 Manganese (Mn) * • .049 .058 066 056 073 Mercury (Hg) • • < .0002 < .0002 < 0002 < .0002 < 0001 Nickel (NO • • .050 .020 024 .010 032 Seleniun (Se) • * < 020 < .030 < .002 < 020 < 002 SIIver(Ag) * • < .003 < .005 < 003 < .003 < 003 Vanadiun (V) * • .004 .004 < .002 .004 004 Zinc (Zn) • • .049 .050 .033 .036 030 Parameter value is less than given detection limits Parameter was not analyzed TABLE 18 (CONTINUED) CHEVRON SEMI-ANNUAL SAHPLE DATA SAHPLE IDENTIFICATION UU-2 UU-2 UU-2 UU-2 UU-2 UU-2 UU •2 DATE SAMPLED 5-12-86 11-4-86 5-5-87 11-16-87 5-4-88 11 4-88 5 8-89 HAJOR IONS (mg/l except as noted) Calciun (Ca) 140.0 180 0 177.0 137.0 119 0 129 0 148 0 Hagnesiun (Mg) 57.0 52 0 52 0 39 0 38 0 39 0 45 0 Sodiun (Na) 389.0 710.0 679.0 473 0 390 0 495 0 513 0 Potassiun (K) 22.0 38.0 35.0 27.0 21.0 29 0 29 0 Bicarbonate (HCOS) 421.9 326.8 348 7 342 6 319.4 362 1 368 2 Carbonate (COS) < 3.0 < 3 0 < 3.0 < 3.0 < 3 0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 0 0 Chloride (Cl) 475 0 1200.0 983.0 741.0 591 0 865.0 824 0 Fluoride (F) .70 1.20 .70 .70 1 20 .90 60 Sulfate (S04) 340.0 522 0 327.0 260.0 222.0 249 0 261 0 MINOR IONS (mg/l) Nitrate+Nitnte (as N) 4 1 1.4 1 0 1.6 1.6 1 2 1 9 Organic Nitrogen (as N) 1 3 1.7 < .1 13 0 .7 1.0 1 7 Ammonia (as N) 3 8 7.8 6 1 9.4 8 9 13 0 8 3 Sulfide < .05 .09 < .05 -.21 .06 .10 ,05 Total Cyanide 02 .02 < .01 .01 .02 < .01 03 FIELD MEASUREMENTS Field pH 8 06 7 56 7.22 7 70 7 60 7 27 7 20 Sp Coriductance (unhos/cm) 2800 0 6400 0 4600.0 2200 0 3180 0 3400 0 3300 0 OTHER PARAHETERS Lab pH (units) 8 12 8 03 7.83 7.83 7.80 7 50 8 30 Lab Conductivity (urhos/cm) 2910 0 4640 0 4380 0 3400.0 2760 0 3810 0 3360 0 Total Suspended Solids(mg/l) 18.0 21.0 13 0 57 0 4.0 110 0 13 0 Total Dissolved Solids(mg/l) 1880 0 2630 0 2600 0 1960.0 1510.0 1920 0 2030 0 Oil & Grease (mg/l) 4.0 2.0 1.0 < 10.0 2.0 < 1 0 < 4 0 Total Organic Carbon (mg/l) 13.0 12 0 15 0 15.0 14 0 12 0 12 0 Total Organic Halogen ugCl/l 110 0 143.0 110 0 260 0 130 0 154 0 108 0 ALKALINITIES as n«/l CaC03 Total Alkalinity 346 0 268 0 286.0 281 0 262 0 297 0 302 0 Bicarbonate Alkalinity 346.0 268 0 286.0 281 0 262 0 297 0 302 0 Carbonate Alkalinity < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 TRACE HETALS (mg/l) Arsenic (As) .012 004 .007 .007 < .003 .005 ,010 Bariun (Ba) 052 038 .042 .032 .046 046 039 Cadmiun (Cd) < .004 < 004 < .005 < 005 < 005 < .005 < 005 Chromiun Hex (Cr+6) 010 < .010 < 010 < .010 < 010 .010 020 Total Chromium (Cr) < 005 .006 < .005 < 010 < .010 < 010 < ,010 Lead (Pb) < .020 < .020 < 002 .002 002 < .002 007 Manganese (Mn) 062 .052 .070 054 070 .073 650 Hercury (Hg) < .0001 < 0001 0002 < 0001 < .0001 < .0001 < 0001 Nickel (NO < .010 .040 .050 < .040 < .040 < 040 < 040 Selenium (Se) < .020 < .010 < 020 < 004 < .004 < 002 ,006 Silver(Ag) < .003 < 003 < 005 < .005 < 005 < .005 < 005 Vanadiun (V) .006 .002 < .010 < .010 < .010 < .010 < 010 Zinc (Zn) .033 .055 .030 .050 .050 .050 .030 Parameter value is less than given detection limits Parameter was not analyzed TABLE 18 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION WU-2 UU-2 WU-2 DATE SAHPLED 11-3-89 5-4-90 11-7-90 MAJOR IONS (mg/l except as noted) CalciLin (Ca) 120.0 133 0 144 0 Magnesium (Mg) 34.0 41.9 41.4 Sodium (Na) 411.0 539.0 604 0 Potassium (K) 26.0 28.8 35.2 Bicarbonate (HCOS) 357.2 357.2 363 3 Carbonate (COS) < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 592 0 814.0 924 0 Fluoride (F) 1.00 .87 3.70 Sulfate (S04) 231.0 265.0 271.0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) < .1 .2 .6 Organic Nitrogen (as N) 3.0 < 5.0 6.0 Annonia (as N) 12.0 12.5 10 8 Sulfide < .05 < .05 .12 Total Cyanide < .01 .02 .01 FIELD MEASUREMENTS Field pH 7.37 7 13 7.29 Sp Conductance (umhos/cm) 2400 0 3000 0 3300 0 OTHER PARAHETERS Lab pH (units) 7.70 7.70 7 70 Lab Conductivity (urhos/cm) 2500.0 3160 0 3320 0 Total Suspended Solids(mg/l) 2.0 14 4 19 5 Total Dissolved Solids(mg/l) 1600 0 2010 0 205.0 Oil & Grease (mg/l) 2 0 < 1 0 1 4 Total Organic Carbon (mg/l) 22 0 14 6 11 0 Total Organic Halogen ugCl/l 150 0 145 0 124 0 ALKALINITIES as n«/l CaCOS Total Alkalinity 293.0 293 0 298 0 Bicarbonate Alkalinity 293.0 293.0 298 0 Carbonate Alkalinity < S.O < 5.0 < 5 0 TRACE METALS (mg/l) Arsenic (As) .006 < .020 006 Barium (Ba) .040 045 .045 Cadmiun (Cd) < .005 < .005 < .005 Chromiun Hex (Cr+6) < .010 < .010 .011 Total Chromiun (Cr) < 010 < .010 < .010 Lead (Pb) .007 < 005 < 005 Manganese (Mn) .070 .074 .100 Mercury (Hg) < .0002 < 0002 .0002 Nickel (NO < .040 < .040 < 040 Selenium (Se) < .010 < .020 < 005 Silver(Ag) < .010 < 010 < 010 Vanadium (V) < .010 < .010 < .010 Zinc (Zn) .050 .053 038 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 18 CHEVRON SEMI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION WU-2 UU-2 WU-2 WU-2 UU-2 uu-2 UU-2 DATE SAMPLED 0- 0- 0 0- 0-0 10-5-84 11- 1 -84 2-14-85 5-7-85 11-14-85 ORGANIC COMPOUNDS VOLATILES (ug/l) Benzene • • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Chlorofora * • < 5.0 7.0 < 5 0 < 5 0 < 5 0 Cyclohexane • • < 10.0 < 10 0 < 10.0 < 10 0 < 10 0 Ethylbenzene • • < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Toluene • • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Tnchloroethane * • < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 •-Xylene * • < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 o,p-Xylene • • < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Xylenes,Total * * * • • * • BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene • * < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Naphthalene * * < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol * * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol * e < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol • • < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone * • < 10 0 25.0 22.0 26 0 < 10 0 Acetonitrile • • < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line • • 5 0 < S 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) • • < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Bis(2-ethylhexyl)phthalate • * 23 0 8 0 46 0 11 0 < 5 0 2-Butanone • • < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Carbon Disulfide • * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane • • < 10.0 37 0 < 10 0 < 10 0 < 10 0 2,4-0imethylphenol * • < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 DI-n-octylphthalate • • < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 2-Hexanone * * < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 Indene * • < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 3-Methylcholanthrene * * -< 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan * * < 20.0 < 20 0 < 20 0 < 20 0 < 20 0 1-Hethylnaphthalene * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene * * < 5.0 < 5 0 < 5 0 < 5 0 < » 5 0 4-Hethyl-2-pentanone * * < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol * -* 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits *. Parameter was not analyzed TABLE 18 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION WU-2 UU-2 UU-2 UU-2 UU-2 UU-2 UU-2 DATE SAMPLED 5-12-86 11- 4 -86 5-5-87 11-16-87 5- 4 -88 11- 4 -88 5-8-89 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < 5.0 < 5 0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Chloroform < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10.0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene < 5.0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 1,1,1-Tri chloroethane < 5.0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 m-Xylene < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 « * o,p-Xylene < 5.0 < 5.0 < 5.0 < 5 0 < 5.0 * * Xylenes.Total • * • • • < 5.0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 310.0 < 25 0 < 25 0 < 25 0 < 25 0 Acetonitrile < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5.0 < 5.0 < 5.0 < S.O < 5.0 < 5 0 < 5.0 Benzenethiol (4) < 10 0 < 10.0 • * • « * B{s(2-ethylhexyl)phthalate < 5 0 < 5.0 5.3 < 5.0 < 5 0 < 5 0 < 32 0 2-Butanone < 10 0 < 10.0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25 0 < 25 0 < 25 0 2,4-D1methyIphenoI < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Ol-n-octylphthalate < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5,0 < 5 0 < 5.0 < 5 0 < 5 0 3-Hethylcholanthrene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Methyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 PentachIorophenoI < 5 0 < 5 0 . < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4)* Not consistently recovered using metho 8240/8270 Parameter value is less than given detection limits Parameter was not analyzed TABLE 18 CHEVRON SEHI-ANNUAL SAMPLE DATA SAMPLE IDENTIFICATION UU-2 WU-2 WU-2 DATE SAHPLED 11-3-89 5- 4-•90 11- 7-90 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene < 5.0 5 0 < 5 0 Chloroform < 5.0 < 5.0 < 5 0 Cyclohexane (2) < 10.0 * * Ethylbenzene < 5.0 < 5.0 < 5 0 Toluene < 5.0 < 5 0 < 5 0 1,1,1-Trichloroethane < 5.0 < 5.0 < 5 0 m-Xylene • • • o,p-Xylene • • • Xylenes,Total < 5 0 < 5 0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5.0 Naphthalene < 5.0 < 5.0 < S.O ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5.0 < 5 0 nt+p-Cresol < 5.0 < 5 0 < 5 0 Phenol < 5.0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5.0 < 5 0 < 5 0 Acetone 42.0 < 10 0 17 0 Acetonitrile (1) < 100.0 • * Am line < 5 0 < 5 0 < 5 0 Benzenethiol (4) • • • Bis(2-ethylhexyl)phthalate < 5.0 < 5 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 < 5 0 < 5 0 Oichloromethane 26 0 < 5.0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5 0 < 5 0 3-Methylcholanthrene (2) < 5.0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * • 1-Methylnaphthalene (3) < 5 0 * * 2-Methylnaphthalene < 5 0 < 5 0 < 5 0 4-Methyl-2-pentanone < 10.0^ < 10 0 < 10 0 PentachIorophenoI < 5 0 • < 5.0 < 5 0 Ouinoline < 5.0 < 5 0 < 5 0 (1) - Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using metho 8240/8270. < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 19 CHEVRON SEMI-ANNUAL SAHPLE DATA SAHPLE IDENTIFICATION DATE SAMPLED UU-3 0- 0- 0 MAJOR IONS (mg/l except as noted) Calcium (Ca) Magnesiun (Mg) Sodiun (Na) Potassium (K) Bicarbonate (HCOS) Carbonate (COS) Hydroxide (OH) Chloride (Cl) Fluoride (F) Sulfate (S04) MINOR IONS (mg/l) Nitrate+Nitrite (as N) Organic Nitrogen (as N) Annonia (as N) Sulfide Total Cyanide FIELD MEASUREMENTS Field pH Sp Conductance (unhos/cm) OTHER PARAHETERS Lab pH (units) Lab Conductivity (unhos/cm) Total Suspended Sol ids(mg/l) Total Dissolved Sol{ds(mg/l) Oil t Grease (mg/l) Total Organic Carbon (mg/l) Total Organic Halogen ugCl/l ALKALINITIES as mg/l CaCOS Total Alkalinity Bicarbonate Alkalinity Carbonate Alkalinity TRACE HETALS (ns/l) Arsenic (As) Barium (Ba) Cadmiun (Cd) Chromiun Hex (Cr+6) Total Chromiun (Cr) Lead (Pb) Hanganese (Hn) Mercury (Hg) Nickel (NO Selenium (Se) SiIver(Ag) Vanadiun (V) Zinc (Zn) < Parameter value is less than given detection limits * Parameter was not analyzed UU-3 UU-3 WU-3 UU-3 UU-3 UU-3 0- 0- 0 10-5-84 11- 1-84 2-14-85 5- 7-85 11-14-85 • 345.0 318.0 356 0 400 0 215 0 • • 77.0 75.0 85 0 92 0 78 0 • * 1160.0 1120 0 1280 0 1500 0 1700 0 • • 58.0 58 0 60 0 70 0 65 0 • * 299.9 290.2 273.1 289 0 273 1 • * < S.O < 3 0 < 3.0 < 3 0 < 3.0 .0 .0 .0 .0 .0 .0 .0 • • 2160 0 2170.0 2100 0 3000 0 2520 0 • • 1.60 1.50 1.20 1.70 .90 * * 688.0 660.0 625 0 650 0 696.0 • • 1.3 1 0 1.4 .8 .5 • * .6 < .1 .1 .7 9 • * .6 .1 .5 < 1 .1 « * < .05 < .05 < 05 < .05 < .05 • • < .01 .06 < .01 < .01 .02 • • 7 59 7.80 7.81 7 26 7 96 • * 6400 0 7700.0 7200.0 11000 0 5800 0 • • 7.71 8.00 8 08 7.80 7.57 * • 8210 0 7850 0 8030 0 9840.0 9040 0 * * 4.0 10 0 7 0 78 0 2 0 * • 5040.0 5020.0 5050 0 6820 0 5920 0 * • < 1.0 < 1 0 2 0 2 0 < 1 0 * • 20 0 14.0 11.0 10 0 14 0 * * 88,0 95.0 74.0 210 0 65 0 • * 246,0 238.0 224.0 237 0 224 0 * • 246 0 238 0 224 0 237 0 224 0 * * < 5,0 < 5 0 < 5 0 < 5.0 < 5.0 • • .009 .013 .009 .029 < 002 * * .076 .061 .070 .062 .061 * • < .002 < 0C2 < 020 < 006 < 004 • * < .010 < .OlO < .010 < .010 < 010 * * < .005 < .005 < .050 < 015 < .005 • * < .025 < .025 < .250 < .075 < .025 • * .076 .084 .120 086 .100 * • < ,0002 < .0002 < 0002 < ,0002 < 0001 • • < .010 < 010 .290 < 030 < ,010 • • < .020 < .030 < .004 < .020 .020 * * < .003 < .005 < .030 < 009 < .003 * * .003 .002 < .020 < 006 .003 * • .011 .009 .050 .017 .020 TABLE 19 (CONTINUED) CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION WU-3 DATE SAMPLED 5-12-86 WU-3 11- 4-86 WU-3 5- 5-87 UU-3 11-16-87 UU-3 5- 4-88 UU-3 11- 4-88 UU-3 5- 8-89 MAJOR IONS (mg/l except as noted) CalciLin (Ca) 333.0 530.0 510.0 343.0 382 0 350 0 321 0 Magnesiun (Mg) 75.0 120.0 110 0 73.0 81 0 83 0 73 0 Sodiun (Ha) 1040 0 2100.0 2100.0 1320.0 1420 0 1460 0 1210 0 Potassiun (K) 56 0 98.0 96.0 64 0 67.0 70 0 56 0 Bicarbonate (HCOS) 345 0 301.2 284.1 226.8 291.4 263 4 360 9 Carbonate (COS) < 3 0 < 3 0 < 3 0 < 3.0 < 3.0 < 3 0 < 3 0 Hydroxide (OH) .0 .0 .0 .0 .0 .0 0 Chloride (Cl) 1590 0 3570.0 3390.0 2390 0 2350 0 2700 0 2090 0 Fluoride (F) 2.20 2.00 1.50 1.30 1.60 1 00 1 50 Sulfate (S04) 770 0 1090.0 912 0 611 0 716 0 727 0 572 0 MINOR IONS (n«/l) Nitrate+Nitnte (as N) 1.5 .8 .9 .6 .6 .4 5 Organic Nitrogen (as N) .9 < .1 < .1 < .1 .3 < 4 4 Annonia (as N) .5 .5 .5 < .1 .2 .2 < 1 Sulfide < .05 < .05 < .05 < .05 < .05 < 05 < 05 Total Cyanide < .01 < .01 < .01 < .01 < .01 < .01 .02 FIELD MEASUREHENTS Field pH 7.66 7.61 7.24 7 92 7.60 7.38 8 20 Sp Coriductance (unhos/cm) 6500.0 11000 0 12000.0 9200.0 8700.0 3300 0 7500 0 OTHER PARAHETERS Lab pH (units) 8 12 8.02 7 91 7.87 8 00 7 70 8 30 Lab Conductivity (unhos/cm) 6930,0 12200 0 11800.0 8630.0 8240.0 10100 0 3450 0 Total Suspended Solids(mg/l) 10 0 5.0 10 0 4 0 5 0 5 0 < 2 0 Total Dissolved Solids(mg/l) 4700.0 7710.0 7790 0 4230 0 4720 0 5470 0 4490 0 Oil & Grease (mg/l) < .5 < .5 < 5 < 10 0 < 1 0 < 1 0 4 0 Total Organic Carbon (mg/l) 9 0 3 9 3 3 7.5 3.5 3.2 2 7 Total Organic Halogen ugCl/l 79 0 269.0 220 0 170 0 220 0 401 0 88 0 ALKALINITIES as n^/l CaCOS Total Alkalinity 283 0 247.0 233 0 186.0 239 0 216 0 296 0 Bicarbonate Alkalinity 283 0 247 0 233 0 186 0 239 0 216 0 296 0 Carbonate Alkalinity < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 TRACE METALf (mg/l) Arsenic (As) .008 .009 .008 .008 .007 .006 006 Barium (Ba) .069 .047 .080 .050 .070 .070 060 Cachiiun (Cd) < .008 < 008 < 030 < .010 < .010 < 010 < 010 Chromiim Hex (Cr+6) < .010 < .010 < 010 < .010 < .010 .020 < UIO Total wnromium (Cr) < .010 < .010 < 030 < .020 < .020 < 020 < 020 Lead (Pb) < .040 < 040 < 002 < .004 .003 < .004 < 002 Manganese (Mn) .160 093 .100 060 .080 100 030 Mercury (Hg) < 0001 < .0001 < .0001 < .0001 < 0001 < .0001 < 0001 Nickel (NO < ,020 < .020 < .200 < 080 < .080 < 080 < 080 Seleniun (Se) < .040 < .020 < 040 < .020 < .010 < .010 < 004 Silver(Ag) < 006 < .006 < 030 < 010 < .010 < 010 < 010 Vanadium (V) < .004 .007 < 050 < 020 < .020 < .020 < 020 Zinc (Zn) .050 .027 < .050 .020 < .020 020 < 020 Parameter value is less than given detection limits Parameter was not analyzed TABLE 19 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION UU-3 UU-3 WU-3 DATE SAMPLED 11-3-89 5-4-90 11-7-90 HAJOR IONS (mg/l except as noted) Calcium (Ca) 360.0 411 0 346 0 Hagnesiun (Ng) 78.0 94 8 77.1 SodiLRi (Na) 1290.0 1600.0 1400.0 Potassiun (K) 67 0 76 2 69 4 Bicarbonate (HCOS) 293.8 296.3 287.7 Carbonate (COS) < 3.0 < 3.0 < 3.0 Hydroxide (OH) .0 .0 .0 Chloride (Cl) 2140.0 2660.0 2670.0 Fluoride (F) 1.80 1 40 1.50 Sulfate (S04) 637.0 700.0 730.0 MINOR IONS (mg/l) Nitrate+Nitrite (as N) .6 .8 8 Organic Nitrogen (as N) < .5 < .5 < .5 Amnoma (as N) .1 .4 1 2 Sulfide < .05 < .05 < .05 Total Cyanide < .01 < .01 < .01 FIELD MEASUREMENTS Field pH 7 44 7.70 7 56 Sp Coriductance (unhos/cm) 7000 0 9200.0 8600 0 OTHER PARAHETERS Lab pH (units) 7 90 8 00 7.90 Lab Conductivity (uitios/cm) 6740.0 8120.0 7880.0 Total Suspended Solids(fflg/l)< 2.0 8.0 6 4 Total Dissolved Solids(nig/l) 4760 0 5590 0 5410.0 Oil & Grease (mg/l) < 1 0 < 1 0 1.5 Total Organic Carbon (mg/l) 25 0 3.5 4 9 Total Organic Halogen ugCl/l< 150 0 < 60 0 < 60 0 ALKALINITIES as mg/l CaCOS Total Alkalinity 241 0 243 0 236 0 Bicarbonate Alkalinity 241.0 243 0 236 0 Carbonate Alkalinity < 5,0 < 5 0 < 5 0 TRACE HETALS (mg/l) Arsenic (As) ,007 < .010 .007 Bariun (Ba) 100 .073 .067 Cadmiun (Cd) < .030 < .015 < 010 Chromiun Hex (Cr+6) < .010 < 010 < 010 Total Chromiun (Cr) < .050 < 030 < .020 Lead (Pb) < 010 < 010 < .005 Hanganese (Hn) ,110 .073 110 Hercury (Hg) < ,0002 < .0002 < 0002 Nickel (NO < 020 < 120 < .080 Selenium (Se) < 020 < .050 < 005 Silver(Ag) < 050 < .030 < .020 Vanadiun (V) < .050 < 030 < .020 Zinc (Zn) < .050 .031 < .020 Parameter value is less than given detection limits Parameter was not analyzed TABLE 19 CHEVRON SEMI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION WU-3 UU-3 WU-3 WU-3 UU-3 UU 3 UU -3 DATE SAHPLED 0- 0- 0 0- 0- 0 10-5-84 11- 1 •84 2-14-85 5-7-85 11-14-85 ORGANIC COMPOUNDS: VOLATILES (ug/l) Benzene • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Chloroform • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Cyclohexane • * < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Ethylbenzene • • < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 Toluene • * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 1,1,1-Trichloroethane * • 11.0 < 5 0 < 5.0 5 0 10 0 n-Xylene • • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 o,p-Xylene • • < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Xylenes,Total * • e * • * * BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene • * < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Naphthalene • * < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 ACID COMPOUNDS (ug/l) o-Cresol * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 m+p-Cresol • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol « * < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene • • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone * * < 10 0 12.0 < 10 0 < 10 0 < 10 0 Acetonitrile • • < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 Benzenethiol (4) * * < 10.0 < 10 0 < 10.0 < 10 0 < 10 0 Bi8(2-ethylhexyl)phthalate * • < 5 0 < 5 0 12 0 < 5 0 < 5 0 2-Butanone * • < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Carbon Disulfide • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane * • < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 2,4-Dimethylphenol • • < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 DI-n-octylphthalate • • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hexanone * • < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Indene * • < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 3-Hethylcholanthrene • * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Hethyl mercaptan * • < 20 0 < 20 0 < 20.0 < 20 0 < 20 0 1-Hethylnaphthalene • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene • • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2^pentanone * * < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pentachlorophenol * • < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline * * < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Not consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 19 (CONTINUED) CHEVRON SEHI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION UU-3 WU-3 WU-3 UU-3 WU-3 WU-3 UU-3 DATE SAMPLED 5-12-86 11- 4 -86 5-5-87 11-16-87 5-4-88 11- 4 -88 5-8-89 ORGANIC COMPOUNDS. VOLATILES (ug/l) Benzene < 5 0 < 5 0 < 5.0 < 5,0 < 5.0 < 5 0 < 5 0 Chloroform < 5 0 < 5.0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 Cyclohexane < 10 0 < 10.0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 Ethylbenzene < 5 0 < 5.0 < 5.0 < 5.0 < 5 0 < 5 0 < 5 0 Toluene < 5.0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 < 5 0 1,1,1-Tnchloroethane < 5.0 < 5.0 < 5,0 66 0 7.9 < 5 0 < 5 0 m-Xylene < 5 0 < 5.0 < 5 0 < 5 0 < 5.0 • * o,p-Xylene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 * • Xylenes,Total * * • • • < 5 0 < 5 0 BASE/NEUTRAL COMPOUNDS (ug/l) Anthracene < 5.0 < 5 0 < 5 0 < S.O < 5.0 < 5 0 < 5 0 Naphthalene < 5.0 < 5.0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5.0 < 5 0 < 5 0 < 5 0 < 5.0 < 5.0 < 5 0 m+p-Cresol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Phenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 400 0 < 25 0 < 25 0 < 25 0 < 25.0 Acetonitn le < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 < 100 0 Am line < 5 0 < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 Benzenethiol (4) < 10 0 < 10 0 • * * * * Bis(2-ethylhexyI)phthalate < 5 0 < 5 0 7,0 < 5 0 < 5 0 < 5 0 < 15 0 2-Butanone < 10 0 < 10 0 < 10,0 < 25 0 < 25 0 < 25 0 < 25 0 Carbon Disulfide < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Oichloromethane < 10 0 < 10 0 < 10 0 < 25 0 < 25.0 < 25 0 < 25 0 2,4-Difflethylphenol < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 DI-n-octylphthalate < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5.0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 < 10 0 < 10.0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 3-Hethylcholanthrene < 5 0 < 5 0 < 5 0 < 5.0 < 5 0 < 5 0 < 5 0 Hethyl mercaptan < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 < 20 0 1-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 2-Hethylnaphthalene < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 4-Hethyl-2-pentanone < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 < 10 0 Pent achIoropheno t < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 Ouinoline < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 < 5 0 (4) Hot consistently recovered using metho 8240/8270 < Parameter value is less than given detection limits • Parameter was not analyzed < Parameter value is less than given detection limits * Parameter was not analyzed TABLE 19 CHEVRON SEHI-ANNUAL SAMPLE DATA SAHPLE IDENTIFICATION WU-3 UU-3 UU-3 DATE SAMPLED 11-3-89 5- 4-90 11- 7-90 ORGANIC COMPOUNDS- VOLATILES (ug/l) Benzene < 5.0 < 5.0 < 5.0 Chloroform < 5 0 < 5.0 < 5.0 Cyclohexane (2) < 10 0 • • Ethylbenzene < 5 0 < 5.0 < 5 0 Toluene < 5.0 < 5 0 < 5 0 1,1,1 -Tnch loroethane < 5.0 < 5 0 < 5 0 n-Xylene • • * o,p-Xylene • • • Xylenes,Total < S.O < 5.0 < 5.0 BASE/NEUTRAL COMPOUNDS (ug/l) A-tthracene < 5 0 < 5.0 < S.O Naphthalene < 5.0 < 5.0 < 5 0 ACID COMPOUNDS (ug/l) o-Cresol < 5 0 < 5 0 < 5 0 *i+p-Cresol < 5 0 < 5 0 < 5.0 Phenol < 5 0 < 5.0 < 5.0 OTHER DETECTED ORGANICS (ug/l) Acenaphthene < 5 0 < 5 0 < 5 0 Acetone < 10 0 < 10 0 < 10 0 Acetonitrile (1) < 100 0 * • Aniline < S.O < 5 0 < 5.0 Benzenethiol (4) * • • Bis(2-ethylhexyl)phthalate < 5 0 13 0 < 5 0 2-Butanone < 10 0 < 10 0 < 10 0 Carbon Disulfide < 5 0 S.O < 5 0 Oichloromethane < 5 0 < 5 0 < 5 0 2,4-Dimethylphenol < 5 0 < 5 0 < 5 0 Di-n-octylphthalate < 5 0 < 5 0 < 5 0 2-Hexanone < 10 0 < 10 0 < 10 0 Indene < 5 0 < 5.0 < 5 0 3-Hethylcholanthrene (2) < 5 0 < 5 0 < 5 0 Methyl mercaptan (2) < 20 0 * • 1-Methylnaphthalene (3) < 5.0 * • 2-Hethylnaphthalene < 5 V < 5 0 < 5 0 4-Methyl-2-pentanone < 10 0 < 10 0 < 10 0 PentachIorophenol < 5 0 < 5 0 5 0 Ouinoline < 5 0 < 5 0 < 5 0 (1) . Identification of this compound is by laboratory reference mass spectrun onl quantitation is an estimate based on a 1 1 response with interenal standard (2) Identification of this compound is ten tive and may be unreliable This conce tration is only an estimated value and may deviate significantly from the tru concentration (3) , Identification and confirmation of thi compound is by laboratory reference ma spectrun, quantitation is an estimate, but IS within 10X of the true value (4) Not consistently recovered using netho 8240/8270 < Parameter value is less than given detection linits * Parameter was not analyzed REFINERY ANALYOCAL DATA APRIL 1991 TO APRIL 1993 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL April 1991 October 1991 April 1992 October 1992 April 1993 ANALYTES (GENERAL) (mg/L) S-1 Nitrate-i-Nitrite < 0 01 < 0 02 1 32 < 0 02 < 0 04 Fluoride 4 03 41 383 384 4 21 Sulfide < 05 < 01 < 05 < 05 < 2 PH 7 01 7 49 6 72 7 05 73 Oil & Grease 0 09 1 5 < 05 < 1 < 10 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 0 046 < 001 < 0 05 < 0 02 < 004 Banum 0159 0 068 0 072 0101 0 047 Beryllium < 0 01 < 0 01 < 0 01 < 0 02 < 0 02 Cadmium < 001 < 0 01 < 0 01 < 0 02 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 02 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 0 01 Lead 0 021 < 0 01 < 0 05 < 0 02 < 0 02 Mercury < 0 0002 < 0 0002 < 00002 < 0 0002 < 0 0002 Nickel 0 063 < 001 0126 0 066 0035 Selenium 0 012 0 005 0005 < 002 < 004 Vanadium < 0 01 < 0 01 < 0 05 0 024 < 0 02 Zinc < 0 01 ** 0 02 < 002 < 001 (FIELD PARAMETERS) PH 6 78 6 74 665 6 98 688 Conductivity (umhos/cm3) 10450 12350 36 22300 27700 PAGE1 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0.005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0005 < 0005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 S>2 ANALYTES (GENERAL) (mg/L) Nitrate-j-Nitrite < 0 05 < 0 02 < 0 02 < 0 02 < 0 02 Fluoride 491 72 3 47 8 22 8 122 PAGE 2 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 April 1992 October 1992 Apnl 1993 Sulfide 7 68 89 109 105 43 PH 4 29 4 26 5 01 5 81 41 Oil & Grease 111 1250 97 62 76 4 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 21 < 0 05 0 335 < 0 05 0 219 Banum 0 018 < 0 01 0 032 < 0 05 0 015 Beryllium 0 031 0 043 < 0 01 < 0 05 0 075 Cadmium 0 022 0 41 0 303 012 0 87 Chromium 1 42 068 0148 0119 2 21 Cobalt 0 59 0 56 0 205 0 34 1 09 Lead < 0 01 0 28 0124 0 098 < 0 02 Mercury < 0 0002 0 00025 0 0016 < 0 0006 < 0 003 Nickel 1 62 1 14 0 602 0 658 1 91 Selenium 0 255 02 0183 < 0 005 < 0 04 Vanadium 0 27 034 0 099 0,191 0 518 Zinc 0 22 ** 0145 0084 0 272 (FIELD PARAMETERS) PH 4 25 4 74 5.11 5 36 3 91 Conductivity (umhos/cm3) 6910 2790 13 14750 23200 (ACID ORGANICS) (mg/L) Benzenethiol < 02 < 5 5 < 05 063 2,4-Dimethylphenol 192 9 89 15.3 16 75 7 42 PAGE 3 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 April 199 Phenol 136 153 451 41 7 22 9 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 02 < 02 < 02 < 02 < 0 02 Indene < 0 05 < 5 5 < 5 < 05 Methyl chrysene < 0 05 < 5 5 < 05 < 0 05 1 -Methylnaphthalene < 05 < 05 < 05 29 017 Phenanthrene 0 53 0 329 09 < 05 0 286 (VOLATILE ORGANICS) (mg/L) Benzene 004 0 0281 0044 0 044 0 034 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 25 < 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 025 < 0 05 Methyl ethyl ketone < 0 05 233 < 0 005 0 905 < 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 025 < 0 05 Toluene 0 057 < 0 01 < 0 01 < 0 05 < 01 Xylene < 0 005 < 0 005 < 0 005 < 0 025 < 0 05 ANALYTES (GENERAL) (mg/L) Nitrate-i-Nitrite 1 02 0 67 3 24 0 42 0 05 Fluoride 1 26 1 08 1 66 1 07 1 9 Sulfide < 05 < 01 < 05 < 05 < 1 PH 7 57 7 67 7 56 8.29 7 91 Conductivity (umhos/cm3) 4658 2100 3545 1963 3740 Oil & Grease 0 94 06 < 05 1 3 < 52 PAGE 4 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl1991 October 1991 Apnl 1992 October 1992 April 1993 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 0 045 < 0 01 0 077 0 027 0 094 Barium 0 067 0 079 0 037 0 039 0 033 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Selenium < 0 01 < 0 005 0 003 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Zinc < 0 01 ** < 0 01 0 012 < 0 01 (FIELD PARAMETERS) PH 7 26 763 7 31 7 28 7 52 Conductivity (umhos/cm3) 2520 349 2660 1705 3645 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) PAGE 5 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (mg/L) S-5 Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate H-Nitnte < 0 01 0 045 < 0 02 0 03 004 Fluoride 1 52 1 46 1 45 1 56 1 97 Sulfide < 05 < 01 < 05 < 05 < 2 PH 718 758 7 36 8 41 7 73 Oil & Grease 09 < 05 < 05 < 05 < 52 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 1 < 01 < 01 < 0 05 PAGE 6 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 199; Arsenic 0 014 0 015 0 012 0 025 0 049 Banum 0114 0111 0 058 0 087 0155 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 0 022 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 019 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel 0 058 0 016 0 028 0 012 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 004 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Zinc < 0 01 ** < 0 01 0 012 < 0 01 (FIELD PARAMETERS) PH 73 7 27 7 23 69 745 Conductivity (umhos/cm3) 2270 2340 4670 3295 5310 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 PAGE 7 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate-i-Nitrite < 0 01 < 0 02 < 0 02 < 0 02 < 004 Fluoride 329 3 55 3 31 35 35 Sulfide 618 159 105 83 39 PH 7 76 8 05 7 76 835 811 Oil & Grease 1 8 1 6 1 53 5 < 53 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 0 094 0104 0 096 0101 0 083 Banum 0194 0184 0149 0169 0151 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 PAGE 8 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 021 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 0 017 0 018 0 017 0 014 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Zinc < 0 01 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 85 7 69 7 83 7 61 7 52 Conductivity (umhos/cm3) 1520 1800 2320 2375 1820 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 02 0 05 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0005 < 0005 < 0005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 PAGE 9 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 0 0021 < 0 001 < 0 002 0 0032 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 0 0058 0 0091 ANALYTES (GENERAL) (mg/L) Nitrate-f-Nitrite < 0 01 0 074 2 08 < 002 < 004 Fluoride 24 2 49 2 35 2 54 2 52 Sulfide 4 66 62 5 26 PH 7 84 8 786 8 46 814 Oil & Grease 25 23 < 05 < 05 < 53 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 0 094 0107 0 097 0 062 Oil Banum 0304 0 268 0192 0136 0 229 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 013 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 PAGE 10 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 April 1993 Nickel < 0 01 0 014 < 0 01 0 01 < 0 01 Selenium < 0 01 < 0 005 0 004 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Zinc < 0 01 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 86 7 79 7 72 7 63 7 75 Conductivity (umhos/cm3) 2350 2050 2900 2220 2740 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 004 01 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 005 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 0 0106 0 0092 0 0087 0 0117 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 PAGE 11 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 199; Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < ND < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 0 0064 0 0092 ANALYTES (GENERAL) (mg/L) Nitrate-I-Nitrite < 0 01 < 0 02 1 68 < 0 02 < 0 03 Fluonde 45 2 42 3 86 244 44 Sulfide < 05 < 01 < 05 < 05 < 1 PH 7 49 7 51 7 07 8 7 39 Oil & Grease 1 1 1 < 05 < 05 < 51 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 0 027 < 0 01 < 0 01 0 036 < 0 04 Banum 0111 0118 0106 0126 0119 Beryllium < 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 01 < 0 01 < 0 01 < 0 01 < 0 01 PAGE 12 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL April 1991 October 1991 Apnl 1992 October 1992 Apnl 199; Cobalt < 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 013 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel 0 013 < 0 01 < 0 01 0 015 < 0 01 Selenium 0 018 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Zinc < 0 01 ** < 0 01 0 023 < 0 01 (FIELD PARAMETERS) PH 719 6 94 713 6 71 711 Conductivity (umhos/cm3) 5660 8000 15 17650 23100 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) PAGE 13 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 199 Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate+Nitrite 2 88 684 6 64 132 109 Fluonde 0 49 0 64 0 99 0 59 054 Sulfide < 05 < 01 < 05 < 05 < 01 PH 7 51 77 7 46 82 769 Oil & Grease < 05 < 05 0 82 < 05 < 52 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 0 01 < 0 01 < 0 01 < 004 Barium 0 062 0 055 0 042 0 05 0 049 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 PAGE 14 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 April 1992 October 1992 Apnl 1993 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Zinc 0 03 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 28 7 51 7 29 71 7 43 Conductivity (umhos/cm3) 1222 1310 1 200 1440 1660 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 002 < 0 002 < 0 001 < 0002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 PAGE 15 WELL D-1 A orroiiiTQ APRIL 1991 THROUGH APRIL 1993 CHEVRON CME • SUMMARY OP BEFINERV ANALYTICAL RESULTS APRIL Methyl ethyl ketone Ethlyl benzene Toluene Xylene ANALYTES (GENERAL) (mg/L) Nitrate-I-Nitrite Fluoride Sulfide PH Oil & Grease (DISSOLVED METALS) (mg/L) Antimony Arsenic Banum Beryllium Cadmium Chromium Cobalt Lead Mercury Nickel Selenium Vanadium Zinc < < < < April 1991 0 05 0 001 0 01 0 005 < < < < 0 05 0 001 0 01 0 005 0 01 0 78 05 76 05 0 038 0 87 03 7 87 06 < < < < April 1992 0 005 0 001 0 01 0 005 < 0 01 < 01 < < 0 01 < 0 01 < 0 28 0 24 < 0 01 < 0 01 < < 0 01 < 0 01 < < 0 01 < 0 01 < < 0 01 < 0 01 < 0 021 < 0 01 < < 0 0002 < 0 0002 < < 0 01 < 0 01 < 0 01 < 0 005 < < 0 01 < 0 01 < < 0 01 WW 0 02 084 05 7 55 05 01 0 01 0181 0 01 0 01 0 01 0.01 0 01 0 0002 0 012 0 002 001 0 01 < < < < 0 05 0 05 0 01 0 005 0 04 088 05 7 61 05 < < < 0 05 0 005 0 01 0 005 005 0 921 1 7 69 53 < 01 < 005 < 0 01 < 004 019 0172 < 0 01 < 0 02 < 001 < 0 01 < 0 01 < 0 01 < 0 01 < 001 < 0 01 < 0 02 < 0 0002 < 0 0002 < 0 01 < 0 01 < 0 002 < 004 < 001 < 0 02 < 001 < 0 01 PAGE 16 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (FIELD PARAMETERS) PH 74 7 59 7 39 76 796 Conductivity (umhos/cm3) 1200 1020 1180 1110 1145 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 05 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 005 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 PAGE 17 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL April 1991 October 1991 Apnl 1992 October 1992 April 1993 D-2 ANALYTES (GENERAL) (mg/L) Nitrate-f Nitrite < 0 05 0 044 < 0 02 < 0 02 < 0 02 Fluonde 0 92 0 96 0 91 1 02 0 91 Sulfide 0 66 03 < 05 0 51 < 1 PH 7 52 7 68 7 63 8 65 7 61 Oil & Grease < 05 < 05 < 05 < 05 < 52 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Banum 0199 0162 0144 0149 014 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 018 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 0 00059 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 004 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Zinc < 0 01 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 753 7 59 74 746 7 53 Conductivity (umhos/cm3) 1070 882 1245 1195 1400 PAGE 18 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) NitrateNitrite < 0 01 0 072 2 34 < 0 02 < 0 03 PAGE 19 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 April 1992 October 1992 Apnl 199; Fluonde 0 32 0 46 0 35 0 48 0 37 Sulfide 0 53 05 < 05 < 05 < 1 PH 7 66 7 79 7 62 8 55 7 97 Oil & Grease 0 59 < 05 < 05 < 05 < 52 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic 0 028 < 0 01 < 0 01 < 0 01 < 0 04 Banum 0 292 0 247 0173 0199 0164 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel 0 016 < 0 01 < 0 01 < 0 01 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Zinc 0 033 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 46 746 7 38 7 41 7 41 Conductivity (umhos/cm3) 692 692 613 703 778 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 PAGE 20 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 19S Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate-f Nitrite < 0 01 < 0 02 < 0 02 < 0 02 0 04 Fluoride 0 81 0 68 068 064 0 74 Sulfide 0 55 62 25 08 < 2 PH 754 8 753 8 28 783 Oil & Grease < 05 < 05 < 05 < 05 < 51 PAGE 21 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL April 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Banum 0 085 0 233 0 05 0103 0102 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 032 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Zinc < 0 01 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 42 7 61 754 763 7 65 Conductivity (umhos/cm3) 2170 1710 2550 2575 2545 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) PAGE 22 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (mg/L) D-10 Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate-i-Nitrite < 0 01 < 0 02 < 0 02 < 0 02 < 0 04 Fluonde 0 77 0 94 086 0 93 0 97 Sulfide 0 64 05 05 < 05 < 1 PH 7 51 7 85 7 55 8 64 7 98 Oil & Grease 1 2 05 06 < 05 < 56 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 PAGE 23 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 199; Arsenic < 0 01 < 0 01 < 0 01 < 01 < 0 04 Banum 0 206 0177 0112 0148 0151 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 015 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 0 01 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Zinc < 0 01 ** < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 63 7 62 7 23 743 756 Conductivity (umhos/cm3) 1085 1090 1325 1310 1175 (ACID ORGANICS) (mg/L) Benzenethiol < 0 002 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 PAGE 24 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate-f Nitrite < 0 01 0 02 < 0 02 < 0 02 < 0 04 Fluonde 1 91 211 2 04 217 217 Sulfide 1 06 05 06 < 05 < 1 PH 7 74 811 7 75 8 79 819 Oil & Grease 1 6 < 05 < 05 < 05 < 51 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 0 01 < 0 01 < 0 01 < 004 Banum 0139 0 092 0075 0 038 0 073 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 PAGE 25 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 199; Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 027 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Zinc < 0 01 < 0 01 < 0 01 < 0 01 (FIELD PARAMETERS) PH 7 83 7 82 7 46 79 7 73 Conductivity (umhos/cm3) 1170 1400 1455 1355 1255 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 PAGE 26 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate-f Nitrite < 0 01 0 072 1 7 < 0 02 < 0 03 Fluonde 0 28 0 32 0 29 0 32 0 32 Sulfide < 05 < 01 < 05 < 05 < 1 PH 7 56 7 77 7 55 8 31 7 75 Oil & Grease < 05 < 05 < 05 < 05 < 51 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 001 < 0 01 < 0 01 < 0 04 Banum 0 086 0 07 0 058 0 061 0 057 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 001 < 0 01 < 0 01 < 0 01 Lead < 0 01 < 001 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 PAGE 27 WELL ".ErANA^CA^SULTS APRIL 1991 THROUGH APRIL 1993 CHEVRONCME-SUMMARYOPBBBNERVANALYT ^^^^^^ April les'' Nickel < < 0 01 0 01 October 1991 Apnll992 October 1992 Apnl 1993 < < Selenium ^ 0 01 < Vanadium ^ 0 01 Zinc (FIELD PARAMETERS) 7 26 PH Conductivity (umhos/cm3) 1050 (ACID ORGANICS) (mg/L) < 0 05 < Benzenethiol ^ 0 005 < 2,4-Dimethylphenol ^ 0 002 < Phenol (BASE/NEUTRAL ORGANICS) (mg/L) < 0 002 < Di-n-butyl phthalate ^ 0 05 < Indene < 0 05 < Methyl chrysene ^ 0 005 < l-Methylnaphthalene ^ 0 005 < Phenanthrene (VOLATILE ORGANICS) (mg/L) < 0 001 < Benzene ^ 0 05 < Carbon disulfide 0 01 0 005 0 01 ** 7 48 1020 0 05 0 005 0 002 < 0 01 < < 0 002 < < 0 01 < < 0 01 < 7 34 1245 < 0 05 < < 0 005 < < 0 002 < 0 002 0 05 0 05 0 005 0 005 0 002 0 05 < < < < < < < 0 002 005 0 05 0 005 0005 0001 0 05 0 01 0 002 0 01 0 01 < < < < 738 1170 0 005 0 005 0 002 0 01 0 04 0 04 0 01 7 35 1435 < < < 0 005 0 005 0 002 < 0002 < < 005 < < 0 005 < < 0 005 < < 0005 < < 0002 < < 0 05 < 0 002 0 05 0 005 0005 0005 0 002 005 PAGE 28 CHE" N TE . SUMMARY OP REPINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL April 1991 October 1991 April 1992 October 1992 April 1993 Chloroform Methyl ethyl ketone Ethlyl benzene Toluene Xylene WW-1 ANALYTES (GENERAL) (mg/L) Nitrate-f-Nitrite Fluonde Sulfide PH Oil & Grease (DISSOLVED METALS) (mg/L) Antimony Arsenic Banum Beryllium Cadmium Chromium Cobalt Lead Mercury Nickel Selenium Vanadium Zinc < 0 005 < 0 005 < < 0 05 < 0 05 < < 0 001 < 0 001 < < 0 01 < 0 01 < < 0 005 < 0 005 < 013 0 761 1 68 086 < 05 < 5 < 7 68 7 57 44 1 3 < < 0 01 < 01 < 0012 < 0 01 < 0065 0 053 < 0 01 < 0 01 < < 0 01 < 001 < 0 014 < 0 01 < < 0 01 < 0 01 < 0 015 < 0 01 < < 0 0002 < 0 0002 < < 0 01 0 012 < < 0 01 < 0 005 < < 0 01 < 0 01 < 0 05 ** < 0 005 0 005 0 001 0 01 0 005 1 2 1 58 05 7 65 05 01 0 01 0 059 0 01 0 01 0 01 0 01 001 0 0002 0 012 0 002 0 01 0 01 < < < < < < < < < < < < < < < 0 005 0 05 0 005 0 01 0 005 0 052 1 07 05 7 56 26 01 001 005 001 0 01 001 001 001 00002 0 012 0002 001 0 032 < < < < < 0 005 0 05 0 005 0 01 0 005 019 1 19 1 788 54 < < < < < < < < < < < 0 05 0 04 0 041 0 02 001 0 01 0 01 0 02 0 0002 0 01 0 04 004 0 029 PAGE 29 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL April 1991 October 1991 April 1992 October 1992 April 1993 (FIELD PARAMETERS) PH 7 62 7 57 764 75 7 57 Conductivity (umhos/cm3) 2360 737 3780 2800 4100 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 0 0181 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 005 Chlorobenzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 PAGE 30 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 1993 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 ANALYTES (GENERAL) (mg/L) Nitrate-H Nitrite 018 0 556 0 266 0 72 012 Fluonde 1 56 0 88 1 59 0 86 1 05 Sulfide < 05 < 2 < 05 < 05 < 1 PH 8 21 7 73 7 48 7 51 7 55 Oil & Grease 44 1 6 1 88 27 < 5 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Banum 0 059 0 057 0124 0 045 0 052 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium 0 012 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 025 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 0 00023 Nickel < 0 01 < 0 01 0 01 0014 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 002 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Zinc 0 053 ** 0 033 0 038 0 034 (FIELD PARAMETERS) PAGE 31 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL WW-3 April 1991 October 1991 April 1992 October 1992 Apnl 199 PH 7 44 7 54 8 34 715 7 57 Conductivity (umhos/cm3) 1240 2270 7510 2800 4740 (ACID ORGANICS) (mg/L) Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg/L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 005 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0 005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0005 < 0 005 ANALYTES (GENERAL) (mg/L) PAGE 32 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 Apnl 1992 October 1992 Apnl 199; Nitrate-i-Nitrite 0 67 0 582 0 449 Oil 0 67 Fluonde 1 7 1 57 1 66 2 07 2 08 Sulfide < 05 < 01 < 05 < 05 < 1 PH 8 43 813 7 68 815 818 Oil & Grease 46 33 < 05 1 5 < 51 (DISSOLVED METALS) (mg/L) Antimony < 0 01 < 01 < 01 < 01 < 0 05 Arsenic < 0 01 < 0 01 < 0 01 < 0 01 < 0 04 Banum 0 094 0 082 0 082 0 08 0 062 Beryllium < 0 01 < 0 01 < 0 01 < 0 01 < 0 02 Cadmium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Chromium < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Cobalt < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Lead 0 027 < 0 01 < 0 01 < 0 01 < 0 02 Mercury < 0 0002 < 0 0002 < 0 0002 < 0 0002 < 0 0002 Nickel < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Selenium < 0 01 < 0 005 < 0 002 < 0 005 < 0 04 Vanadium < 0 01 < 0 01 < 0 01 < 0 01 < 004 Zinc 0 014 ** 0 015 0 015 0013 (FIELD PARAMETERS) PH 7 75 8 27 854 7 76 809 Conductivity (umhos/cm3) 5930 3350 9240 10800 11900 (ACID ORGANICS) (mg/L) PAGE 33 CHEVRON CME - SUMMARY OF REFINERY ANALYTICAL RESULTS APRIL 1991 THROUGH APRIL 1993 WELL Apnl 1991 October 1991 April 1992 October 1992 Apnl 1993 Benzenethiol < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 2,4-Dimethylphenol < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenol < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 (BASE/NEUTRAL ORGANICS) (mg\L) Di-n-butyl phthalate < 0 002 < 0 002 < 0 002 < 0 002 < 0 002 Indene < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Methyl chrysene < 0 05 < 0 05 < 0 05 < 0 005 < 0 005 1 -Methylnaphthalene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Phenanthrene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 (VOLATILE ORGANICS) (mg/L) Benzene < 0 001 < 0 002 < 0 001 < 0 002 < 0 002 Carbon disulfide < 0 05 < 0 05 < 0 05 < 0 05 < 0 05 Chloroform < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 Methyl ethyl ketone < 0 05 < 0 05 < 0 005 < 0 05 < 0 05 Ethlyl benzene < 0 001 < 0 001 < 0 001 < 0.005 < 0 005 Toluene < 0 01 < 0 01 < 0 01 < 0 01 < 0 01 Xylene < 0 005 < 0 005 < 0 005 < 0 005 < 0 005 mg/L = milligrams per liter ** = data not provided umhos/cm3 = Micromohs per cubic meter PAGE 34 APPENDIX C ANALYTICAL DATA CHEVRON PIPELINE COMPANY RE 312-R0«05«\ch(rvi«i\rovrcTa ciDe\2r23-!»4\Ar APPENDIX C ANALYTICAL DATA Chevron Pipeline Investipation Monitoring wells EF-S and EF-8 were sampled and analyzed for BTEX and TPH Bodi of these moQitoring wells contained low levels of both BTEX and TPH BTEX components were not previously detected in these monitormg wells The Chevron pipelme data is also m Appendix C KB. 312-lt0i036\chs¥m\iwicm.aw\3-2344\ifa' CHEVRON PIPELINE DATA ^^^^ - I E @ B (1 Iff ig NOV 2 2 'S93 HAZAKDOUSWASTT BRANCH TABLE 1 SUMMARY OF WELL COMPLETIONS AND MEASURED WATER LEVELS^ Reference Elevation Water Table Elevation^ U«ll No. Depth Drilled (ft) Screened Depth (ft) (TOC in ft)2 Septentwr 24, 1991 B1 U 1 0-13 5 103 01 97 35 B2 13 0 5-13 102 00 96 43 B3 14 1.5-14 100 00 97 32 B4 14 1 0-13 5 101 15 94 91 B5 14 1 0-13 5 100 16 94 92 EF5* 16 1 5-16 97 86 ... EF8* 17 1 0-17 100 91 96 68 - IAU elevations are relative to an assuned datun of 100 00 feet at top of casing (TOC) for ^Reference elevation is top of uell casing. ^Elevations based on water depths measured on the indicated date. ^Existing monitoring wells for Chevron Refinery utilized for Investigation. /3 Wasatch Geotechnical, Inc. TABLE 2 SUMMARY OF LABORATORY ANALYSES PETROLEUM AND AROMATIC HYDROCARBONS (all results in mg/L or ppm) Sample Identity OVH Reading Oil m\d Grease TPH^ Benzene Toluene ic Hydroca Ethyl- benzene Total Xylene Naphth a lene SOIL - collected Septcober 17, 1991 BI a 5 0 ft. 46 <ioo2 170 0.3 0.5 0.5 0.8 0 6 82 a 4.5 ft 193 <100 280 0.4 0.5 1.0 0 7 2 0 SOIL - Collected Septciter 18, 1991 B3 S 5 0 ft 280 1,400 3,700 1.1 0 5 0.5 2.3 14 B3 a 10 0 ft. 30 <100 <2 0 <0.1 <0.1 <0.1 <0 1 <0.1 84 a 5 5 ft 930 530 11,600 140 290 80 400 19 B5 a 3 0 ft. 460 <100 720 7.8 15 3.4 23 2 5 B6 a 6 0 ft 28 <100 3,700 1.8 0.5 0.5 0 6 2 4 UATER - Collected Septeoter 24, 1991 B1 MT2 <5 0 28 0.29 0.023 0.099 0 28 0.056 B2 HT <5 0 0 96 0.31 <0.002 <0 002 0.020 0 022 B3 MT <5 0 19 <0 005 <0.005 0.018 0 050 2 4 B4 NT <5 0 20 0.042 0 097 0.021 0.14 <0.010 BS NT <5 0 3 0 0.051 0 031 0 015 0 042 <0 004 EF5 NT <5 0 3 0 0.007 0 007 <0 005 0-012 <0 010 EF8 HT <5 0 3 9 0.006 0.006 0 007 0.013 0 010 ITPH = Total Petroleun Hydrocarbons < « Not Detected at given detection limit, NT B Not tested Wasatch Geotechniczal, Inc. Appenciix D APPENDK D MARKETING TERMINAL RE. 312«OnSfiWh0nai\mKn.cBe>2-23^\ib APPENDKD CONTENTS Tables D-l Marketmg Tenmnal Momtormg Wells Completion Smimiary D-2 Marketmg Termmal Groundwater Momtonng History D-3 Marketmg Termmal Aquifer Tests Figures D-l Marketmg Tennmal Momtormg Wells KB 312-R0a0SeUte>raaWnciB.ew\2-2M*\ttr APPENDIX D MARKETING TERMINAL This appendix presents information on the groundwater momtormg system at the Chevron USA Inc Salt Lake City Termmal (Marketmg). The Marketmg Termmal is not part of the Chevron Refinery Chevron began installmg momtormg wells at Ae Marketmg Termmal m 1983 Five momtormg wells (MW-101 through MW-105) were installed to momtor groundwater upgradient and downgradient of petroleum storage tanks and loadmg and unloadmg facilities In 1986, five momtormg wdls (MW-107 and MW-109 through MW-112) were mstalled to deteraune the source of oil seeps visible along the west side of the mam Marketmg Tennmal access roads Momtormg wells MW-106 and MW-108 were installed as rq)lacement momtormg wells for MW-102 and MW-101, respectively In 1987, 10 additional monitormg wells (MW-113 through MW-i22) were installed and m September/October 1990, momtormg wells MW-123 through MW-137 were installed to further evaluate the vertical and horizontal extent of fuel hydrocarbons m shallow soil and groundwater beneath the Marketmg Termmal and proposed expansion area An additional 13 momtormg wdls were installed sometime m 1991 The locations of these momtormg wells are illustrated on Figure D-l Monitoring Well Construction Construction mformation for all but 13 of the Marketmg Terminal momtormg wells is available Table D-l summarizes the construction mformation The existmg mformation consists of summary tables, borehole logs, momtormg well installation reports, and bormg log and momtormg well completion summary diagrams These construction data she^ are compiled m this i^pendix A few pieces of the construction details are missmg These are type of filter pack used for momtonng wells MW-101 through MW-105, top of casmg elevation for momtormg wells MW-113 through MW-137, depth of filter pack for momtormg well MW-114, and depth of bratomte seal for momtormg wells MW-114 through 117 and MW-119 through MW-122 No construction information for monitormg wells MW-200 through MW-212 was found These monitoring wells were sampled during the sprmg 1992 samplmg at the Marketmg Tennmal but no construction information was provided m the samplmg report (EarthFax 1992) Mr Allan Moore, State of Utah Bureau of Solid & Hazardous Waste, explamed that Chevron's Marketmg Tennmal is not required to submit documents, so the State of Utah files may be mcomplete D.2 KB. 31^K0tDSackm<m^f«n<clm.clM\^2^4t\lfcr DATE 11/16/93 JLH DN FILE NAME 3i2\R08056\TITLE-4 DWG UGCM 9 L. SOURCE- EARTHFAX, 1992 CHEVRON REFINERY SALT LAKE CITY, UTAH FIGURE D-1 CHEVRON MARKETING TERMINAL MONITORING WELLS ENVIRONMENTAL MANAGEMENT, INC TABLE D-l CHEVRON CME MARKETING TERMINAL MONITORING WELL COMPLETION SUMMARY Weft Nmniiffr Date Completed Tetil Depth Drilled (ft fags) Total Depth Cased (ft bgs) Cssmg Diameter and Type Top ol" Casing EieratioB Screened Intcnral (ft bgs) Slot Size (in) Fnter Pack (ft fags) Bentonite Seal Driffing Method Comments Weft Nmniiffr Date Completed Tetil Depth Drilled (ft fags) Total Depth Cased (ft bgs) Cssmg Diameter and Type Top ol" Casing EieratioB Screened Intcnral (ft bgs) Slot Size (in) Fnter Pack (ft fags) Bentonite Seal Driffing Method JExkthig Confahl Oil Fbase Skatos MW-101 9-12-83 250 15 0 4" PVC 99 29 7 5-15 0 ( 010) 6 5-15 0 4 5-6 5 Auger Y Y C&Rby MW107 MW-102 9-12-83 31 5 ISO 4" PVC 100 78 8 0-15 0 (010) 7 0-15 0 6 0-7 0 AugCT Y Y C&Rby MW108 MW-103 9-13-83 16 5 15 0 4" PVC 99 47 5 0-15 0 ( 010) 4 0-15 03 3040 Auger Y Y O MW-104 9-13-83 19 0 12 0 4" PVC 99 38 3 0-12 0 ( 010) 2 8-12 0 1 8-2 8 Auger Y Y O MW-105 9-13-83 16 5 15 0 4" PVC 100 64 4 0-15 0 ( 010) 4 0-15 0 34-40 Aug» Y Y O MW-106 3-li-86 11 0 11 0 4" PVC 100 58 1 0-11 0(020) 10 ft (#16 Sand) 1 foot Aager Y N O MW-107 3-18-86 12 0 11 0 4" PVC 98 77 1 0-11 0(020) 10 ft (#16 Sand) 1 fixjt Auger Y Y D 1 MW-108 3-18-86 11 0 11 0 4" PVC 99 01 1 0-11 0 ( 020) 10 ft (#16 Sand) 1 fioot Aug« Y Y O&Rby 1 MW102 1 MW-109 3-18-86 11 0 11 0 4" PVC 98 55 1 0-11 0 ( 020) 10 ft (#16 Sand) 1 foot AugCT Y N O&R 1 MW-110 3-18-86 11 0 11 0 4" PVC 98 50 1 0-11 0 ( 020) 10 ft (#16 Sand) 1 foot Auger Y N OAR 1 MW-111 3-18-86 11 0 11 0 4" PVC 97 78 1 0-11 0 ( 020) 10 ft (#16 Sand) 1 foot Aug« Y Y o 1 MW-112 3-18-86 11 0 11 0 4" PVC 97 71 1 0-11 0(020) 10 ft (#16 Sand) 1 foot Aug« Y Y o 1 R — r^lacement well constructed D = destroyed O a= Open D-4 KB. 312-ROIOS6Vitevnn\it>v\ciB»\SWMUD-l (bl\2-234<\iiilEf TABLE D-l (Continued) CHEVRON CME MARKETING TERMINAL MONITORING WELL COMPLETION SUMMARY Weil Kumber Date Completed Total Depth Drilled <ft fags) Total Depth Cased (ft fa«^> Canag Diameter and Type Top of Casing Eleratiott Screened Intcrral (ft hgs) Slot Site (in) FflferVaek (ft fags) Bentonite Seat Drilling Method Conuncnti Weil Kumber Date Completed Total Depth Drilled <ft fags) Total Depth Cased (ft fa«^> Canag Diameter and Type Top of Casing Eleratiott Screened Intcrral (ft hgs) Slot Site (in) FflferVaek (ft fags) Bentonite Seat Drilling Method tog Contain Oil Phase Sum MW-113 4-15-87 11 5 11 5 4" PVC — 1 5-11 5 ( 020) 10 5ft (#16 Sand) 1 foot Auger Y Y o MW-114 4-15-87 11 5 11 5 4" PVC — 15-115 ( 020) (#16 Sand) Y Auger Y Y o MW-115 4-15-87 11 5 11 5 4" PVC 1 5-11 5 ( 020) 10 6ft (#16 Sand) Y Auger Y Y o MW-116 4-11-87 11 5 11 5 4" PVC 15-115 ( 020) 10 5ft (#16 Sand) Y Auger Y Y o MW-117 4-7-87 11 5 115 4" PVC — 15-115 ( 020) 10 7ft (#16 Sand) 08 feet Auger Y Y o I MW-118 4-16-87 11 25 11 25 4- PVC — 1 25-11 25(020) 10 15 ft (#16 Sand) 1 1 feet AngCT Y Y o 1 MW-119 4-16-87 11 5 11 5 4' PVC — 1 5-11 5 ( 020) 10 5ft (#16 Sand) Y Auger Y Y o 1 MW-120 4-16-87 11 5 115 4" PVC — 1 5-11 5 ( 020) 10 6ft (#16 Sand) Y AagBt Y Y o MW-121 4-16-87 11 33 11 3 4" PVC — 1 3-11 3 ( 020) 10 33 ft (#16 Sand) Y Augw Y Y o MW-122 4-16-87 13 5 13 5 4" PVC — 3 5-13 5 ( 020) 125ft (#16 Sand) Y Aager Y Y 0 MW-123 9-24-90 18 5 17 0 4" PVC — 3 0-17 0 ( 010) 2 5-17 0 (#8 Sand) 1 0-2 5 Auger Y N o MW-124 9-24-90 18 5 18 0 4" PVC — 3 0-18 0 (010) 2 5-18 0 (#8 Sand) 1 0-2 5 Aager Y Y 0 R = replacement well constructed D a: destroyed O = Open D-5 KB. ^l^KOnSAcbM^aWW^SWMUI>-l (U\2-2»44\iiilcf TABLE D-l (Continued) CHEVRON CME MARKETING TERMINAL MONITORING WELL COMPLETION SUMMARY Wen Number Date Completed Total D^^ Drilled <ft fags) Total Depth Cased (ft fagt^ Casing Diameter and Type Top of Cashig EieraAnk Screened Interval (ft bgs) Slot Size Cm) Filter Pack (ftfagit) Bentonite IMOing Method Comments | Wen Number Date Completed Total D^^ Drilled <ft fags) Total Depth Cased (ft fagt^ Casing Diameter and Type Top of Cashig EieraAnk Screened Interval (ft bgs) Slot Size Cm) Filter Pack (ftfagit) Bentonite IMOing Method EJUS ting Contam OH Wt*S« Statns 1 MW-125 9-30-90 20 0 20 0 4- PVC — 5 0-20 0 ( 10) 4 0-20 0 (#8 Sand) 3 0-40 Auger Y Y o MW-126 9-30-90 19 5 19 0 4" PVC — 4 0-14 0 ( 10) 3 5-19 5 (#8 Sand) 2 5-3 5 Aug« Y N o 1 MW-127 10-16-90 19 0 18 0 4" PVC — 2 5-18 0 (10) 2 0-18 0 (#8 Sand) 1 0-20 AugCT Y Y 0 1 MW-128 10-10-90 18 5 18 5 4" PVC — 3 0-18 5 ( 10) 2 5-18 5 (#8 Sand) 1 5-2 5 Auger Y N 0 MW-129 10-10-90 18 5 18 5 4" PVC — 3 0-18 5 ( 10) 2 5-18 5 (#8 Sand) 1 5-2 5 Auger Y N D MW-130 10-9-90 18 5 18 5 4" PVC — 3 0-18 5 ( 10) 2 5-18 5 (#8 Sand) 1 5-2 5 Auger Y N D 1 MW-131 10-11-90 18 5 18 5 4" PVC — 3 0-18 5 ( 10) 2 5-18 5 (#8 Sand) 0 8-2 5 Auger Y N D 1 MW-132 9-22-90 16 5 15 0 4- PVC — 5 0-14 5 ( 10) 5 0-14 5 (#8 Sand) 4 0-5 0 Auger Y Y 0 MW-133 9-22-90 14 5 14 5 4" PVC — 4 0-14 5 ( 10) 3 0-14 5 (#8 Sand) 2 0-3 0 Auger Y Y 0 MW-134 9-23-90 16 0 16 0 4" PVC — 6 0-16 0 ( 02) 6 0-16 0 (#8 Sand) 50-60 Auger Y N D MW-135 10-23-90 17 5 17 5 4" PVC — 3 0-17 5 ( 10) 2 5-17 5 (#8 Sand) 1 5-2 5 Aug« Y N 0 1 1 MW-136 10-23-90 19 0 19 0 4" PVC — 3 5-19 0 (10) 3 0-19 0 (#8 Sand) 2 0-3 0 Aug« Y N 0 1 R — rq>lacanent well constructed D destroyed O = Open D-6 KB. 312-RDtl»CtdMvraa\f«vVcaBlSWMUI>-I an2-23-9t\iBl[f TABLE D-l (Contmued) CHEVRON CME MARKETING TERMINAL MONITORING WELL COMPLETION SUMMARY Welt Number Date Completed Total Depth Drilled (ft fags) Total De|^ Cased (ft fags) Casmg Diameter and Type lV»p of Casim Etevatiim Screened Intcrral |ft fags) SMSbeCm) FUterFaek Bentonite Seal Drilling Method Commcntt Welt Number Date Completed Total Depth Drilled (ft fags) Total De|^ Cased (ft fags) Casmg Diameter and Type lV»p of Casim Etevatiim Screened Intcrral |ft fags) SMSbeCm) FUterFaek Bentonite Seal Drilling Method Contahi OB Phase Statttt MW-137 10-23-90 19 5 19 5 4" PVC — 4 0-19 5 ( 10) 3 5-19 5 (#8 Sand) 3 0-3 5 AugCT Y N o MW-200 Unlcnown Unknown Unknown Unlcnown Unknown Unknown Unknown Unknown Unlcnown N N o MW-201 Unknown Unknown Unknown Unlcnown Unknown Unknown Unknown Unknown Unknown N N o MW-202 Unknown Unknown Unknown Unknown Unlcnown Unknown Unknown Unknown Unknown N N o MW-203 Unknown Unknown Unlcnown Unknown Unknown Unknown Unknown Unknown Unknown N N o MW-204 Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown N N o MW-205 Unknown Unknown Unknown Unlcnown Unknown Unlcnown Unknown Unknown Unknown N N o MW-206 Unlcnown Unknown Unknown Unknown Unknown Unknown Unknown Unlcnown Unknown N Y o MW-207 Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown N N o MW-208 Unknown Unknown Unknown Unlcnown Unknown Unknown Unknown Unknown Unknown N N o MW-209 Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown N N C MW-210 Unknown Unknown Unknown Unknown Unknown Unlcnown Unknown Unknown Unknown N N o MW-211 Unknown Unknown Unlcnown Unknown Unknown Unknown Unknown Unknown Unknown N N 0 MW-212 Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown N N o R = rq)lacement well constructed D = destroyed O = Open D-7 KB. 31^ROS05Aebnnll^nw^eB•\SWMUI>-l *n2-2}^\inkf Several of the momtormg wells m this area have been destroyed because of construction activities These momtormg wells are labeled m Table D-l The majority of momtormg wells m the Marketmg Termmal contam liquid hydrocarbons There may be some momtormg well deterioration over time because PVC casmg is not compatible for momtormg groundwater wells containing high concentrations of orgamc compounds Wdl deterioration should be momtored closely Overall, it appears that the shallow momtormg wells mstalled at the Mark^g Tmninal have been constructed adequately and could be used for fiiture RCRA facility mvestigations (RFI) activities If construction information on momtormg wells MW-200 through MS-212 can be located, these momtormg wells may also be appropriate for RFI activities Groundwater Monitoring The history of groundwater momtormg at the Mark^mg Terminal is summarized m Table D-2 The results of aquifer tests are summarized m Table D-3 The results from diree s^arate samplmg events are summarized m the followmg subsections November 1989 Samphng Event Nme monitormg wells (MW-101, MW-105, MW-106, MW-107, MW-109, MW-110, MW-112, MW-122, and S-22) were sampled m November 1989 Momtormg well S-22 was mstalled as part of the Chevron refinery mvestigation and is located west of the Marketmg Terminal These wells were selected for groundwater samplmg because they contamed no free-phase hydrocarbons The samples were analyzed for total petroleum hydrocarbons CTPH) as gasolme or Stoddard solvent, benzene, toluene, ethylbenzene and xylenes (BTEX), oil and grease, purgeable-pnority pollutants, lead, cadmium, chromium, zmc, and total dissolved solids TPH as gasoline was detected m samples collected from all momtormg wells exc^t MW-IOS and S-22 Concentrations ranged from 300 figfL m MW-109 to 19,000 /tg/L m samples from momtormg well MW-106 TPH as Stoddard solvent was detected at 480 /ig/L m samples from MW-IOS No detectable levels of any compounds analyzed were detected the sample from momtormg well S-22 Therefore, it appears that the petroleum spills and leaks at the Mark^g Termmal have not affected groundwater quality m the refinery area of the Chevron property J).g KR 312-RanMWhwiai\iwram.cBe\2-2944\ib TABLE D-2 CHEVRON CME CHEVRON MARKETING TERMINAL AREA GROUNDWATER MONITORING HISTORY Date Activity September 1983 Install five momtormg wells to momtor petroleum storage tanks March 1986 Install five new and two rep\»cemeat momtormg wdls August 1986 Subnut aquifer test r^rt October 1986 Subnut aquifer test report Sprmg 1987 Pneumatic product reoowery system mstalled m well MW-108 April 1987 Install 10 momtormg wells 1988 Perform soil vapor survey May 1989 Install dedicated samplmg equipm^it m wells Conduct groundwater samplmg 1989 Install total fluids vaterceptor trendi along western and southern boundary of marketmg termmal August 1989 Measure liquid levels m momtormg wdls 101-122 and S-22 November 1989 Measure liquid levels m momtormg wdls 101-122 and S-22 Conduct groundwater samplmg March 1990 Submit groundwater monitormg report September - October 1990 Conduct subsurface mvestigation Install 27 soil bormgs and 14 momtormg wells February 1991 Complete subsurface mvestigation r^rt January 1992 Measure liquid levels m all momtormg wells February 1992 Measure liquid levds m all momtormg wells March 1992 Measure liquid levels m all momtormg wells April 1992 Measure liquid levels m all momtormg wdls May 1992 Measure liquid levels m all momtormg wdls June 1992 Measure liquid levels m all momtormg wells August 1992 Submit sprmg 1992 semiannual groundwater progress r^rt D-9 RBJia«0nSC\ckwna\nvcae\SWMUI>-lM3-234«\Bkf TABLE D-3 CHEVRON CME SUMMARY OF MARKETING TERMINAL AQUIFER TE^ Well Number Type «r Aqmrer Test Hydnnilfo Condw^vii? (cm/sec) MW-101 Slug 1 45 X 10^ MW-103 Slug 141x10* MW-108 Slug 7 92 X 10^* MW-110 Slug 2 42 X la' MW-111 Slug 2 64 X 10-' MW-112 Slug 2 80 X la^ S-22 Slug 1 87 X la* MW-108 Specific Capacity 1 9 X la' MW-110 Specific Ci^acity 16 X la' MW-111 Specific Capacity 18 X la' MW-112 Specific Capacity 4 5 X la' D-10 KB. 31»K0taSindimnB\nmwVSWMUD-3 M\2-23^\akf The concentration of benzene ranged from below the detection limit m die sample from momtormg well MW-110 to 3,500 /tg/L m the sample from momtormg well MW-101 BTEX was detected m samples from all momtormg wells exc^t MW-IOS and S-22 Oil and grease were detected m samples from all momtormg wells exc^t MW-106 and S-22 No otho* purgeable^riority pollutants were identified m any samples analyzed The sample from momtormg well MW-106 contamed trace amounts of Cd, Cr, Pb, and Zn Samples from momtormg wells MW-112 and MW-122 contamed trace amounts of Pb Analytical results of the November 1989 samplmg event are presented m this i^pendix Free-phase hydrocarbons were detected in all monitormg wells which were not sampled (MW-103, MW-104, MW-108, MS-111, and MW-113 through MS-121) The hydrocarbon thickness ranged from 0 1 feet m momtormg well MW-120 to 0 75 feet m momtormg well MW-115 September 1990 Sampling Event September 1990 samplmg mcluded momtormg wells MW-104, MW-105, MW-117, MW-118, MW-119, MW-120, and MW-122 Pump locations SI, S2, and S4 of the mterc^tor trench and the oil/water separator were also sampled The samples were analyzed for TPH (gas and diesel), BTEX, and fuel fingerprmtmg TPH and BTEX were detected m samples from wells MW-120, MW-122, and pump S4 Toluene, ethylbenzene, and xylene were also detected m the sample from well MW-105 Decembo* 1990 Sampling Event December 1990 samplmg mcluded momtormg wells MW-105, MW-106, MS-107, MW-109 through MW-112, MW-120, MW-122 through MW-131, and MW-133 through MW-137 These momtormg wells contained no free-phase hydrocarbons The samples were analyzed for TPH (gas and diesel) and BTEX Samples from momtormg wells MW-123 and MW-125 through MW-127 were also analyzed for VOCs D-l 1 KB. 312-Ka8QSAetNwraa\i«ni)m.(»\2-234«\ifcr TPH as gasoline was detected m samples from momtormg wdls MW-106, MW-107, MW-110, MW-111, MW-112, MW-120, MW-128, MW-133, and MW-135 through MW-137 Samples from momtormg wells MW-107 and MW-133 contamed TPH as diesel No TPH was detected m samples from momtormg wells MW-105, MW-109, MW-122 through MW-127, MW-129, and MW-131 through MW-134 1^-12 <tB. 31^KO«HaoiMmoVlWTOm.eM\2•23-M\lfa REFERENCES _l Dames & Moore 1986 R^rt Marketmg Tennmal Aquifer Tests Chevron U S A , Inc Salt Lake City Refinery October 17 j EarthFax Engmeermg, Inc 1992 Sprmg 1992 Semi-Annual (jroundwater Progress Report, Salt Lake City Marketmg Termini August "» Western Geologic Resources, Inc 1990 Groundwater Momtormg R^rt, Chevron Marketmg Termmal March I I Western Geologic Resources, Inc 1991 Subsurface Investigation, Chevron Marketmg Taminal February "1 I D 13 RR 312-ROtOSA<knmBVrmcm.omsVM34«\ifa' ( CHiM ::HILL fKOJCCT MUMBCM B17422.AO aontNC MuwacA KW 101 SHEETl OF 1 CHiM ::HILL SOIL BORING LOG SOIL BORING LOG CHEVRON PIPELINE CO PROJECT ELEVATION 97-41 fg<iT-f»i>>.^ . OniLLiNC CONTRACTOn . LOCATION SALT XAKE CITY TERMINAL "MOUNTAIN STATES DRILLING OniLLINC METHOD ANO EOUIPMENT. 3 1/2" ID Hollow Sten Auger, CME 55 WATER LEVEL AND DATE 6 94 BTOC 9/2^63 START 9/12^^83_ nN«H9/lV83» .lOGCER C.F. Feast w w 9 O • <• »AMPLC z cc w I STANDARD PENETRATION TEST INI SOIL OESCRIPTION NAME GRADATION on PLASTICITY PARTICLE SIZE DISTRIBUTION COLOR MOISTURE CONTENT RELATIVE DENSITY SR CONSISTENCY SOIL STRUCTURE INERALOCV uses CROUP SYMBOL COMMENTS DEPTH OF CASiNC DRILLING RATE DRILLING FLUID LOSS TESTS ANO INSTRUMENTATION grab N/A SILTV 5AKDV GRAVEL PILL, coarse SS 2-2-4 ... ww&i oose, no odor SILTY CIAY, dark gray, damp moderately dense, organic, tight' no odor SS 7-7-8 CLAY, V. plastic, light and dark gray, damp, slight odor SWL SS 7-6-8 CLAY, no recovery-sample from side of sampler, vet, strong odoi: 10- E SS 6* I 3-20-16 SAND, well graded fine to coarse light gray, wet, mod-slight odor 16" SS 8* 7-7-9 SS 6* 6-6-6 SAND, well graded, fine to coarsj J bedded well sorted fine sand, we^ med dense, ned-light gray with greenish gray staining, no odor SS 10* 6-5-5 SAND, fine to ned, med-gray, wet picaneous. no odor \ SANTY SAND, fine to med ned-gray Hiicaneous, no odor ' i 8P /4J> D - 20' SS 12* 9-12-14 CLAYEY, SILTY, SAND, fine to med med brovmish gray, nicaneous wet, no odor 26 SS 0* Augered to 25', hole caved, no sample (TD 25.0' ) rVC CAT- PLATE 3 I I I \ I I I I 1 I I r [eH.'M| ;;HIII PnOJlCT NUMBER B17422.AO BORING NUMBER MW 102 SMEtt 1 0» 2 SOIL BORING LOG PROJECT CHEVRON PIPELINE CO . LOCATION SALT LAKE CITY TERMINAL ELEVATION 98.72 (Surface) DRILLING CONTRACTOR. DRILLING METHOD AND EOUlPMENT. WATER LEVEL AND DATE 7.88' BTOC 9/22/83 „,,,9/12/B3 . FINISH 9/12/83* .LOGGER. C.F. Feast w w 3 e • M SAMPLE « > 10- 16. 20- 26 - X X ll grab grab SS SS SS SS SS s w S u STANDARD PENETRATION TEST RESULTS N/A N/A 12* 12* 16* 12* • N| N/A (PILL), gravel and fine sand, brown, strong -odox N/A SILTY CLAV, light brown, soft strong odor 6-5-5 SILTY CLAY, V plastic, light to Tted gray, damp, nod odor 3-8-22 30-30- 15-16-17 26-34 SOIL DESCRIPTION NAME GRADATION OR PLASTICITY PARTICLE SIZE DISTRIBUTION COLOR. MOISTURE CONTENT RELATIVE DENSITY 2R CONSISTENCY SOIL STRl>CTURE INERALOGY uses CROUP SYMBOL coarsi light Pushed asphalt plug, so sample as above on outside of sampler ^et at 8' SwL SAND med to coarse, darK gray Dccassional gravel, wet.mod odor SAND, fine to coarse, light brown, wet, mod odor SILTY SAND, coarse, light brown wet, slight odor 8P 8M COMMENTS DEPTH OF CASING DRILLING RATE DRILLING FLUID LOSS TESTS AND INSTRUMENTATION eu roc 93 02 CONCfiSTB PLUS &trrr/tJ& mi t3eMroNrr&) SAhiP 40 p/pe. /5 O fi.D toeivaijopao PLATE 4 ( ::HILL PROJICT NUMBIR B17422.AO BORINC NUMBIR MW102 SHEET 2 OF 2 ::HILL SOIL BORING LOG SOIL BORING LOG PROJECT CHEVRON PIPELINE CO ELEVATION 98.72 (Surface) . DRILLING CONTRACTOR . .LOCATION SALT LAKE CITY TERMINAL MOUNTAIN STATES DRILLING DRiLL»*G METHOD AND ffv..piiir»T 7 OP Hollow Stem Auger, CME 55 ....r...^. A^nn^Yr 7.88' BTOC 9/22/83 «T^,T 9/12/83 riNiSH 9/12/83 .LOGGER C.F. Feast [ w w 3 O • w 26 tCONTT); E so E SAMPLE > K ll SS SS K 111 S o STANDARD PENETRATION TEST RESULTS NR 18*. (Nl 13-16-11 SILTY SAND, fine to coarse. Light gray, wet, slight odor 5-10-11 SOIL OESCRtPTlOM NAME GRADATION OR PLASTICITY PARTICLE SIZE DISTRIBUTION COLOR. MOISTURE CONTENT RELATIVEDENSlTY OR CONSISTENCY SOIL STRUCTURE hlNERALOGY uses CROUP SYMBOL SANO. weJ brown wel 11 sorted, fii t, no odor SW Ine, med CLAY, V. plastic, med-brown, \damp no odor SM CH COMMENTS DEPTH OF CASING DRILLING RATE DRILLING FLUID LOSS TESTS AND INSTRUMENTATION PLATE 5 ( CH.'M ::HILL PROJECT NUMBER B17422.AO BORING NUMBER MW103 SHEET 1 OF 1 CH.'M ::HILL SOIL BORING LOG SOIL BORING LOG PROJECT CHEVRON PIPELINE CO .LOCATION SALT LAKE TERMINAL ELEVATION 97 81 '(Surface) DRILLING CONTRACTOR MOUNTAIN STIlTFg nPTT.T.TUr. DRILLING METHOD AND rr^•..pu^^.T 7 >|- OD Hollow Stem Auger. CME 55 WATER LEVEL AND DATE6-21' BTOC 9/22/83 sTARg/12/B3 FINISH 9/^3/^3 .LOGGER. C.F. FEAST 1 'l hi w w 9 O • M 10- 16- SAMPLE < > Ul Z E ^1 grab grab SS SS SS SS SS >• K Ul s u Ul STANDARD PENETRATION TEST N/A N/A ir NR IN) N/A ASPHALT over SILTY GRAVEL (FILL) coarse gravel, fine sand, ned. brown. N/A wLAY, v. plastic, dark gray, aamp^ strong odor CLAY, Plastic, .off white. V minox fine gravel and coarse sand, no 1 odor. 1-1-2 8-7-8 19-3^20 SOIL DESCHIPTIOM NAME. GRADATION OR PLASTICITY ^ARTICLE SIZE DISTRIBUTION COLOR MOISTURE CONTENT RELATIVEDENSlTY SR CONSISTENCY SOIL STRUCTURE INERALOGY uses CROUP SYMBOL :8 SAND, med to coarse, soft, wet; moderate to strong odor LAYEY SAND, fine sand, mod i^Iasticity, med brown, minor gravel, moderate odor, wet 8W As Above, m 8C CLAYEY SAND, interbedded plastic clay and med to coarse sand, yyellow brown, wet, slight odorj oy'V'y to 1^5 COMMENTS DEPTH OF CASING DRILLING RATE DRILLING FLUID LOSS TESTS AND INSTRUMENTATION 4'P^C&HO ^Pipe. PA.CK. P/Pa. MTH SLOTS eac/s-o lao •pyjcCAP PLATE 6 I ( • CH2M ::HILL PROJtCT MUUBIR BORINC NUMBER • CH2M ::HILL B17422.AO MW104 SHEET 1 OF 1 • CH2M ::HILL SOIL BORING LOG PROJECT CHEVRON PIPELINE CO inrAYirM SALT LAKE CITY TERMINAL ELEVATION 98 31 (Surface) DRILLING CONTRACTOR MOUNTAIN STATES DRILLING DRILL ING METHOD ANO toiiiPuFNY 7 >»" OD Hollow Stem Auger, CME 55 WATER LEVEL AND DATE 5.71' BTOC 9/22/83 START 9/^3/83 9/13/B3' .LOGGER C. F. Feast Ul III ^ O • M 10- SO- SAMPLE X X X X 1 ll grab Tab SS SS SS SS SS >• a Ul S u STANDARD PENETRATION TEST RESULTS 8* lor (Nl 2-^2 4-2-2 7'«-10 frS-7 SOIL OESCRIPTION NAME GRADATION OR PLASTICITY PARTICLE SIZE DISTRIBUTION COLOR MOISTURE CONTENT RELATIVEDENSlTY ^R CONSISTENCY SOIL STRUCTURE hlNCRALOGY uses GROUP SYMBOL SILTY SANDY GRAVEL, coarse, dark gray, damp, loose, nod. odor (FILL) SANDY SILT, Sticky, dark gray, damp to 4 * wet below 4 *, strong " odor, wet li CLAY, V. plastic, dark gray and white, organic, V. strong odor wet 5WI; SANDY GRAVELLY CLAY, light gray brown wet, strong odor No sample, smooth soft drilling GRAVELLY SILTY CLAY, plastic med brown soft, wet, no odor SILTY SAND, fine, med brown soffr wet, no odor OM MH OH OC CL 8M COMMENTS DEPTH OF CASING DRILLING RATE DRILLING FLUID LOSS TESTS AND INSTRUMENTATION CBMEJJT SEAL 4*P\fCSCH 40PIP&- -f'AC sew NtU. S>Cf££tJ— SANO -{ PACK. 4iP^SCH 40PiPB PJ/SLOTB- DOC 12 O 2^ fl - CDBV£LOPet? PLATE 7 I ( I I'M II III L PROJICT NUUBCR B17422 AO BORINb NUMDIR MW105 SHEET 1 o» SOIL BORING LOG tiJtCT CHEVRON PIPELINE CO SALT LAKE CITY TERMINAL 98 80 (Surface) DRILLING CONTRACTOR , IVATION „, I IMG METHOD AND EOUlPMENT 7 OD Hollow Stem Auger, CME 55 . LOCATION MOUNTAIN STATES DRILLING ,.,o.,.pi.>aDD*TF_7 BTOC 9/22/83 9/13/83 ..^.^H 9/13/83* C. F. Feast SOIL DESCRIPTION NAME GRADATION OR PLASTICITY PARTICLE SIZE DISTRIBUTION COLOR MOISTURE CONTENT RELATIVEDENSlTY OR CONSISTENCY SOIL STRUCTURE MINERALOGY uses CROUP SYMBOL Asphalt over SILTY SANDY GRAVEL coarse, dark gray, sticky, damp, strong odor below 2.0 ft. (FILL) GRAVELLY SILTY SAND, fine, dark gray, damp to wet, loose, strong eatfr i8 GRAVELLY SILTY SAND, fine to to coarse, dark gray, wet, loose, atroneiador SK: '11^ GRAVELLY CLAY, V. plastic. m*d gray brown wet. sozt, v. slight odor ' CLAY, gravelly at top, sandy at bottom, v. plastic, organic, dark gray, no odor * CLAY, plastic, med brown to 14'5 silty sand, fine to med. ^greenish gray, no odor wet. TDf^5 CH COMMENTS DEPTH OF CASING DRILLING RATE DRILLING FLUID LOSS TESTS AND INSTRUMENTATION 4PVCSeM 40 PIP& 4'P^CSCH PACK. gcgs go 4-P^SCH 40 PIPE: SLOTS too /So /I PVC C^P (l^SLL DSS/BLOPBD hy OGLING 9-14 6^ TLATE 6" Lxc8^ isn ai^fSl twJMA ilhed ef Inttaltatten » ,><4//&A^-p>«^ ^ ayij^^ LOG OF BORING ANO OBSERVATION WELL BORING Oescrtp!ien OBSERVATION WELL Type ol Obscrvolien Well ' Crountf Elev.. Top of-At9trElev (QGt*f- —(Protective Casing} Vented Cop ID. of fitter Ptoe ^ Type ef yp -Type ef Bocknit Around >Top of Seo) Elev -Type ef Seol f*"**'-'"' ^ Top ef Rlter Elev • j • Elev. ef Perforolion* Size of Optnwgs '^j-*^ Fv*k^ Dtometer ef Cesing m% T.p— Type ef FilterMoieriol.. rs^r 2i Bettem ef C«e. Elev, Bettem ef Berm^ Dev. . |i. I Diemeter ef Bonng t P^JLJ »r ^rP^at ffAK Vtr/ffr f-^^^V tKl/rf^i "^^^^ AsJ'Ju^/^f^j. :RVA^^OK WELL INST/^LLAT\0K REPORT > fl^^ v*^«^ ^LT- i-fikir ct-rr .Titht. LOG OF BORING AND OBSERVATION WELL BORINC OBSERVATION WELL Typt ef Observetlen Well - i5l OcKrtption Tep of*t«rElev 7g' — (Protective Cesing) Vented Cep •LD.«f R»tr Pipe. Type ef P>pe.jg£i£<2J^ ffc^- _____ -Type ef Beeknil Around •Tep ef Seel Elev.. Type ef Seol Motenol Top ef niter Elev Elev. ef Per fore tiens Sse «f Opentngs_i£2iL Diemeter ef Ceeing Hp—— Of Filter Meterie).. ^g^—rBottom of Ceg Eler. Bottom e( Bemg Elev. , |. .. I diemeter ef Beringr^*^^ ' OBSERVA'iiON WELL INSTALLATION REPORT Observation Well No. I gA«rV. A^/fX££77/i/M. T^H/^JAL. t^^nK\^n Sif-L-V t-AtilT g/r^ ^fRig ^C^fr e t( Instolled ftj^/rA?f»<!T AMS /AV: t>»»u J/A//£, T""r 1 cf Instellelien » AA//^ui ^ at4j^u>^ lu LOG OF BORING AND OBSERVATION WELL BORINC Detenptien r*< p- A«.»4-^ OBSERVATION WELL Type ef Obscrvotlon Well Cresmd Dev. rr Ll. Lf L9» / Lo^^.L, k»* Lc.-i2- Lr^-jZ. I Top, ef-fitserElev. f (Protective Casing) -Vented Cop 10. ef Raer Pipe ^ Type ef Pipe.£££E2i£ -Top ef Seol Elev ____ Type ef Seal Mottriol_ f^FU>er^ tec iff ?.1 Top ef Filter Eiev -ElevL ef Pirferetions , 4 ^—*^ Openjngs»i£ijgL Diemeter ef Cesing r.p—^ Type ef FilterMeteriel. •^r3 Bottom ef Ceo. Elev. Bottom Borm) Etev. I Dtomeler ef Boring OBSERVA..ON WELL INSTALLATION REPORT Observetien WeS No. /o? el Instellatton LOG OF BORING AND OBSERVATION WELL BORING Deseripfion OBSERVATION WELL Type ef Observetlen WeO . Creuni Elev. Top ef-fi««rEley.-I£±^ (Protective Casing) Vented Cop D. of Riser Pipe ^ Type ef P.pp £c^/>¥ti Type ef Boekfill Around Riser vj- Tep ef Seol Elev., Type ef Seol Materio). . - ^—Top ef Filter Elev -Elerc ef Pcrforetions Size of f>p»"'"7« 'OtO Dtomeler ef Cesing ^ Tip fiZ —Type ef Filter Meteriol. ^ ^iWfgt^-K JACK I* ottem ef Csg Elev Bottom ef Bormg Elev. > I •• I 'Diometer ef Boring ErtRTHFAX ENGINEERING INC •RILLING LOG PAGE 1 or Prejaet Nona' SALT LAKC TCRrllNAL Oun«r-/CI iBn« CHCVRON USA PRODUCTS COnPANY Bering/Uall Nunbar nu-109 Bering/Uall Loeatlem 79T^ SB N 1260S 33 C Project Nunber UC-Z^-11 Rareranea Clavatlen' «1T TB Rererenee Peintt TOP OF CASINO Oeta Or 111 ad ZO HARCH 1992 Leggad Byi JRP A RBS OriIIing Controeteri ZinnCRnAN UCLL BCRVICCS OrlllIng Hethed HOLLOU STCn AUGCR Rig Typei nOBILC B-^0 Firat eeeurrance eT 6 U • 8 0 Static U L i 3 T5 Oetee riaoaured 3-ZO-SZ 4-lT-9e Serine Depth irtI 11 0 Uell Ospth (Tt) 11 0 Bering Ofometer llnl S** LITHOLOGIC OESCRIPTION ANO OBBCRVATIONS UCLL COnPLCTION OCTAILB SANOY GRAVEL Construction Till conaiatmo of sond and gravel Brown CIoeta ore •ub-ongulor to •ub-rouidad Sond-aize Traction i• nedium to cooree B''oined Grove I-size Traction hoa cI oats up to 1 S" Oenae '/y //y •/// /// /yy 5-/// //y //y //y //y •/// //y /// /// /// <L6C 10- SILTY CLAY tZ SYR 3/0) very dork gray riicoceoua ModsratB pIoaticity Hydrocarbon-Iika odor Oily aheen on driI I euttinga Tirm Co for change to gray Color chonge to (IOYR 5/3) brownieh gray SILTY SAND (SY S/Z) I ight groy Sond lo mediuni to fine groined Poorly aorted 8ub-ongu1or to aub- rounded Abrupt lithologic contact Mineralogy cons lata or carbonate quartz ond muacovite mice Violent reoction with HCI Medium denee Locolly cleon intarbeda Sond grodes to very cooree with eome tren-etoining .Bantonita Seol ' Z PVC 10 Slot Screen ' 20-10 Haah S11ico Sand Threoded Cnd PIug :5— 20— 25- OBSERVATION WELL INSTALLATION REPORT Observotion Well No_—^ifi I ^^^\\^^ ^cr- t-AtsiT CfT-y \KxiJ^i&li£LJLJtJU instelled By^/</^feg £aSL.t^C Dote. .Time I of Inttollotion - ^/^^J o^j^u,^ LOG OF BORING AND OBSERVATION WELL BORINC Desenpfion AM/. OBSERVATION WELL Type ef Observollon Well ^ Ground Dev.. L|. Lf L,.. U«, L|» LT- Top,of-Rt«rElev yg'tO (Protective Cesing) Vented Cop -10. of Raer Pme ^ Type ef Pipe.££i££i2. Top ef Seoi Elev.____ Type ef Seel Motenol..... i ml Top ef Filter Elev Eiev. ef Per fere tions • Openings-.! L^a^ Diometer ef Cosing S^"^ Type of Filter Moteriol. •B^jj .Bottom etf Csg Eiev. • • Bottom ef Boring Elev. »1- I • "Diometer of Bormg'^^'^ EARTHFAX ENGINEERING. INC •RILLING LOG PAOC 1 or Project Noaei SALT LAKC TCRrUNAL Ownar/CI lent I CHCVRON USA PR00UCT8 COMPANY Berlng/Uell Nuaban MU-UO Berlng/Uell Lecotiom 7TBS 25 N 1Z609 Bl C Project Nuaber UC-21S-11 ReTeranoe Clevetlem 4Z1T B6 Rererenee Peintt TOP Or CASING Oete Dr 1 1 1 ad 1 ZO MARCH 199Z Loggad By JRP « RBO Drilling Centroeter ZIMMCRMAN UCLL BCRVICCS OrlllIng Methodi HOLLOU STCM AUGCR Rig Type MOBILC B-^0 rirat eeeurrenee eT 0 U • TO Static U L • 3 90 Oetae Meeeurad 3-Z0-9Z •4-1T-9S Boring Depth irtl i 11 0 Uell Depth irt) 11 0 Borino Diemeter lin) 8** t3 LITHOLOGIC OCSCRIPTION ANO OBSCRVATIONS UCLL COMPLETION OCTAILB SANDY GRAVEL Conatruction Till conaiating or aond and groval Brown Claata ore aub*ongular to Bub-rounded Sond-81za Troction ia madi en to coorae groined Groval*aize Traction hoa cloata up to 1 S" Oenae 5- 10- SILTY CLAY (IOYR S/Z) grayiah brown Mottled Moderate ploetieity Hydrocarbon-1 ike odor Moderate reaction with HCI Firni MI nor grove I I oca I Iy Color change to very dark gray/block mottled SILTY SANO (SY 5/Z) light grey Send le nediua to Tine groined Poorly eorted Sub-angular to aub- rounded Abrupt Lithologic contoct Mineralogy conaiata of carbonate quortz and muacovite mi CO Violent reaction with HCI Medium denaa Minor grovel locally cloat aize 1" Locolly cleon mterbede Sond grodea to coorae with aome iron-ataining . Bantonita Sao I •2" PVC 10 Slot Screen . ZO-^0 Meah Silica Sond .Threaded Cnd PIug 15- 20— 25- OBSERVA^liON WELL INSTALLATION REPORT Observotion WeV No. iBllotiOn ' ^t/^^i T-wL auj^^ ILL ^tr t-AniT e/ry .Time. LOG OF BORING AND OBSERVATION WELL BORINC OBSERVATION WELL Type ef ObseryenonWcll Deseriplton 6 - y ^fcu>*\ •{'/'^ Top, ef-Ateer Elev..XZiZJB. (Protective Casing) Vented Cop 4—ID. ef Riser Pipe ^ Type of Ptpe.iS£i£^12S. Type ef Bockntl Around Riser. Tep ef Seel Elev., Type ef See\ Motenol „,, Top ef Filter Elev EIeK of Pcrforetions Sae ef Openings_«£2:iL [j? §3—Diemeter of Cesing £/** Tip —Type of RlterMeteriol— ^^^^^"^^^ -TACK S^rH—Bettem ef Csg. Elev.. Bottom ef Boring Dev. ; I. -J I 'Diometer ef Bormg-^^^ * OBSERVATION WELL INSTALLATION REPORT Observetion WeB Neu Pig fi t/ Instolled By^i^/A^fegT p^tP J/A//L -n^^ I et Instollotion ."^I&lJuiJLJtaSs. LOG OF BORING AND OBSERVATION WELL BORINC Descnption V , |A*-e.^ OBSERVATION WELL Typt of Observetion Well Ground Eiev CAi/*^i 9 "7 ft Tep ef-fteerElcv. °7'P/ —(Protective Cesing) Vented Cop I—ItL Of Riser Pipe ^ Type of Ptpe.££i£i2iSi vj • -Topef Seel f'*" ^4—Type ef Seol Meienol-— Filter Elev BeK ef Perforetions Size of Or***'"g« tOlO Diemeter ef Cesing Tip fCH ^§'3—Type of Rlter Meterlel- :«9tt«n«tfC»g Elev Bottom ef Bormfi Elev. , !• .1—roiomeler ef Boring£i^£jl i ^^otJon well NO tUeilLLIi ,^ Potr *</'^/»-' Time. Y.,e' far., tU cU, '^'i 7''r'y,,rt TD-- us' (Protective Cesmg) Vented Cop ID of Riser Pipe, Type of Pipe_i_tt:iL_iiL a. -Type of BocKftll Around Riser •^j—Top of Seol Elev Type of Seol Motenol. ' 1 Top ef Filter Eiev Eiev ef Perforetions _ Size ef Openings^ftXlC Diometer ef Cesing Tip M WM J3—TyP» of Filter Mirferlol. •rS-H—Benom ef Csg. Elev. j—Bottom ef Bormg Elev_ L—Diometer ef Boring Inspected »y ^ r c»>^ f.ikp Tpf^..)j{ Observotion WeH No.—Mti-ltH. I StlPW i,., Kt- c,,... it^-.j/..j ^^^i^*] ^'^1 Instolled By y^yU^ Ts^.W.^ Dote Time tallolion —to' L.n.-. ^f^^ ^.^^^^ LOG OF BORING ANO OBSERVATION WELL BORINC t Deseripfion AwUt fp*>iv« ,aK.fttrvf jn'*lft* 6r«y fcil^ ie«<l W^it teH.njjk g lb' *cir«l |TD * il 5 OBSERVATION WELL Type of Observotion Well fivi t^^^A.r \^\\ Ground Elev. I Top of Riser Elev (Protective Casing) Vented Cop ID of Riser Pipe H' Type of Pipe JdailkJlL •Type of Bockfill Around R»«*r -Type of Seol Motenol. vJ'"Topef Seol Elev. •Tep ef Filter Elev •Elev. ef Perforetions —. Size ef Openings «,;££L_ ^—Diometer ef Cesing jf-gg Tip H" ^ t—Type of Rlter M .eriei. ettom ef Csg. Elev. I 1—-Bottom ef Bormg Elev«». L -4 Diometer ef Bormg ..JSl tM '„Ar |tr/t^^4mr| fir >Lj «»<ppw flfftia^ |>tpa T^|^ff pf ^ Inspected Wy ^ C p«~» • ewe* -w-i 1 Wl % I Observotion Well K^j.nc [,fRig ^.^'r fi-frJ * « ! of Instollelion ^^ u.tu^j ..f..^ f uj, r Instolled fty ^yl^^ R-M Dote-a/l2,£il_Time... LOG OF BORING AND OBSERVATION WELL BORING Oesertption e iff - iJT CrbblY, y^^iWi, * i"^'- 7.5' 6.-tY eL.7«y TD - il 5' OBSERVATION WELL Type 0! Observotion Weil fivi w.,W vllf Ground Elev Top. ef Riser Elev, (Protective Cesing) Vented Cop •ID of Riser Pioe Type of Pipe^sJjidiikJlL fsL Type of Boctcfill Around P'«py vj • Tep ef Seol Elev. Type of Seol Moienol_ Top ef Filter Elev ... Elev. of Perforetions gf[s J Diemeter ef Cesing •Mi Tip—iiT i^"*—Type ef FilterM .eriel. ettom ef Csg. Eie\L. Bottom ef Bormg Dev. -Diometer of Boring ip' Inspected hy^JStJLSc^ Observotion Well Ho..J2txLJlL. fl of IndeMotion ic" U?lUw ^^/m r.u,,ir Instolled fty trr^ tlr,ll.n^ PnU MfH->*t TimP LOG OF BORING AND OBSERVATION WELL BORINC Description M "t Cfry - Dai*v<% *'»yr]f w/ OBSERVATION WELL Type of Observotion Well r.xJ »iV.^.4r.' U. H Ground Elev Top ef Riser Elev . —(Protective Casing) Vented Cop ID. ef Riser PIDC M' Type of P.pt «.UJf Type ef Boekfill Around Riser vj' -Tepot Seol Elev ^ Type ef Seol Motenol« S| ^ Rlter Eiev Elev. ef Perforetions ^4^: j ' Size ef Openings....t£2L. wig A " Diemeter ef Cesing Kf^ Tip—it:—! _ —Type of FilterM .criol, rs§.73— Bottom ef Bormg Dev..i_ IOmeter ef Boring Inspected h^^J^SSiL • —• ••-•Wtor^i iwi^ Wl\ I itmt. LOG OF BORING AND OBSERVATION WELL BORING Deseriplton OBSERVATION WELL Type ol Observotion Well flv>J ^'i.M'f^- Wi>\l Top ef Riser Elev (Protective Casing) Vented Cop ID ef Riser Pioe M" Type of PiB* ^V^'L\f ML' Type of Bocl^fill Around •vj- Top of Seol Elev Type ef Seol Motenol. h nl?wi4^^ r}*y rtwfl Rlter Elev Elev. ef Perforetions Size ef Qp^fttwg* C20 Diemeter ef Cesing g Tip-.ji:: '3—Type ofRlterM <criol TTxra—Bottom ef Csg. Elev, j " j Bottom of Bormg Elev_. I i • 4 ' Diometer ef Boring ,.J£l Inspected >y C fpHS Observotion Well M» tAvJ'Uft Instolled By ^ Dflte_.-</..^/», T;». LOG OF BORING ANO OBSERVATION WELL BORING Description HC tier pp^ »ru.f#ni». ih tc<*W'> el i' •.>! <i^ gwW.i Hi CHI- TS'- 11 a?' SffV jr-y cUy . 1 pl»»*'t .•U «>i.V TD II 2J OBSERVATION WELL Type 0! Observotion Welt Stf} Mm.ter Ground Elev, T V Top. of Riser Elev.. Ll« L«<.JLlL LT (Protective Casing) Vented Cop •I—ID ef Riser Pipe. Type ef Pipe '^M^j^y Type ef BocMiIl Around •I I \j- "Top ef Seol Elev ^Type ef Seol Motenol. h,>nVi>i>.4p f\Ay • Top of Rlter Elev Elev. ef Perforetions Size of Openings..^.SIL. Diemeter of Cesing Tip felt ..p . WMit—Type of RlterM«-terio!. 4r»? J Bottom ef Csg. Elev I—L •Bottom ef Bormg P**" •Diometer ef Boring ..JiO!] Inspected »y "gf^*. Observotion Well No—Jl^eLlii. LOCOlion t«t<^ a^tc'vJ inw, c„^,r \H . I»j/.W ^jirh-'^ ^ ^' Instolled »y ^f'«'> ^•••> ^^^ H..-»j PBIP u^.i/t-i T.m. tnstollotien —to Wi-lUw M.>f»-, auj/r LOG OF BORING AND OBSERVATION WELL BORING Description 0 2$'-5' Brt*^ iHyWv^l.H DArK y-Y-lf*"-'* •'I'Y? T f'- ti r' V »»H y.^ fcUy TD»US" OBSERVATION WELL Type of Observation Well fau.' M>n f r v:.U Ground Elev. Top ef Riser —(Protective Casing) Vented Cop ID ef Riser Pipe Type of Pipe.5tiiiiuk—lii. Top of Seol Elev ...^ Type ef Seol Motenol. Top ef Filter Elev Elev. ef Perforetions ... Size ef Op>wif*g* cac •Dtomeler ef Cesing Tip^**-' t.' £ f« Tip g^f 'U—Type of Filter Materiel. 8«lom d e>«. El« I 1 -Bottom Of Bormg Eiev ... -Diometer ef Bormg Inspected By...£L£si2. Observotion Well No , ^'V^-Ug. 1 P.PMm>. m\ O^K'VJ ff,.. r.^^fr n^.l^S/l Instolled By R-yl^s bnll.no Puf* W^iL/fT T.m» I Inttollolion It" K Utw c4pm *uf|fr LOG OF BORING AND OBSERVATION WELL BORING Description ejj'-M gr.veHy vl4y •1/ w.V>Wlr» 5f'-75' O'-f ^.'^i^ TDs ti5* OBSERVATION WELL Type of Observotion Well 6>»i ^r.Aer vJ>U Ground Eiev, Top ef Riser Elev. (Protective Casing) Vented Cop ID of Riser Pipe M' I Type of Pipe.ijtbtdskJlL Type ef Boekftll Around Riser %j- Top of Seol Elev, Type ef Seol Motenol.. Top ef Rlter Elev EleVi ef Perforetions Sae ef ftpf**"«g* -^^^ Diometer ef Cesing T-tp M" Type ef Filler Mcrferioi. rs^H—Bottom or Csg. Elev. ' —^BotJem of Bormg Elev Diometer ef Boring lo" Inspected »y Observotion Well No—t2l±_Ll2L el Instollotion—ta' v.M..u ^.j^r — Lecetian USt'S 3PMP'^- i,... vi^ Instolled By ft^r^ l>f-it">^ DBt> ^^L/^^ T-.m. LOG OF BORING AND OBSERVATION WELL BORING •s I Description CIS*-S' 6f*-n 5f*w«lVf «.t4y Ciml j'.T (»r..y tUyty fc.»»wl,HCaU' OBSERVATION WELL Type ef Observotion Well fiv: w.A»^r vJ^\l Ground Eiev. Top ef Riser Elev (Protective Casing) Vented Cop ID ef Riser Pioe M'* Type ef Pia» ^.kf.Li> MC P'^ Type ef Bocknil Around Wi«pr Top ef Seol Elev. Type ef Seol Motenol.. •Kft4'.».4« (i,,^ Top ef Rlter Eiev —« Elev. ef Perforetions Size ef opBftiwg* - 'Cic Diometer ef Cesing Type of RlterM ^cnol. uiir pn ftrtaimm Bottom of Csg. Elev. Bottom ef Bormg Elev..... Diemeter of larmg 10" Inspected By—£jLS£L OBSERVAlifR WELL JNSTALLATION ^EPORT 5pif uV-* fff*K.»fti Obsen^otion Well No~-lMllli tt.ga1.».>> l«t<T«> 3ty>/wJ C. . ^r. iM-ifi fftj JUlLU-tJii Instolled Ry Rr.^ fir.\^.>. Pat, M/n/<t -n,.. . e [ el Inttollotion to* Wll>w -J/^ a^^.r Chifdybox Bantonn padatMal 4"ieh40 — PVCeumg ttStni— «eh40PVC eung 10 12 GRAPHIC LOG DESCRIPTION •AS 10 12 Atphtft MA sssssssss sssssssss . • _ _ U k u Silty GRAVEL (GM) brown, v»ry tianw dwnp 20-25% fn»laeoan9Qmni.eobU0t,irfttocart)on odor (from euttingt) Silty GRAVEL (GM) brown, wry donu damp 20-25% lin«toooarMBravo(,»in«lioobblM,hydroe»t>on odor Clayey SILT (ML) black aoft. wat 0-5% und hydrocarbon odor roots Silty CUY (CL) gmy-blaefc, toft, w*t 5-10% finat hydrocart>on odon roots Silty GRAVEL (GM) gray, madium dansa wat 0-5% tinas firta to ooaraa praval Silty SAND (SM) pray, loose wat. 15-20% fines, fina to coarse aand, fine to eoarsa smve). hydoearfoon odor Ll I I I I I I I I i I I MHttliut 0 3 * » Cotttlnues PfuIHubickey Drilling Cooipany P C Exploration LdghBccm Drilling Method. IO.(rHoOow sten auger 9/24/90 Driller Dave Mott A Eddie Wdl Heed CaaipMan. Oukty box Ic locking cap Typeof Sampler rapUtbarr^ TD (Total D^>th)- 18.5a MION faakiMnini Boring Log and Well Gomplebon Details MW-123 (Bormg B-123) Chevron Marketing Termiittl Salt UkeQty, Utah WESTERN GEOLOGIC KESOURCES. INC. MONITOR WEU 123 17-00805 PC 12 tBStnd — jOiO'sloned- tth40 PVC CMing 14 20 22 24 26 I I f I I I I I ll I kcMMu* 0 2 4 • 0pm» GRAPHIC LOG 12 14 16 18 20 22 24 26 U^U_kUkk t.kkl.^kl.>. Ill kkUukUCUU DESCRIPTION Silty SANO (SM) gray, loose wat 15-20% fines fine to coarse sand, fine to coarse gravel hydroeaiton odor Silty SAND (SM) gray loose, wret 5-10% lines iinesan< 0-5% day, micaceous Clayey SAND (SC) gray loose, wet fines, line to medluir sand Same as above TD^ 18.5 ft. 1 m^m^^^^ Solid wtMvcBtalb fhcgBBMidwiD 1 Drwd wtm tffitmtumm Boring Log end Well Gomplebon Details MW-123 (Boimg B-123) MONTTOR WELL 1 - - - tttttiai wlan uwimln L^li MM 'VVyy/y Hadouidwlmpitetload 1 nv ji^^Mw^ Chevron Marketmg Terminal Salt UkeQty,Utah 123 WESTERN GEOLOGIC RESOURCES. INC. 17-008 05 Chnsiy box ttoduneoap Bentont* ptMtsMi 4*«eh40 — PVC casmQ asSand- 4 .oi(rsioti*d- scri40PVC cuin0 10 12 : s-24 so SfiO PC tviw) GRAPHIC LOG i 5* ij 03 A.i:i.-i.-\.^.-t.-\.i DESCRIPTION 10 Asphalt «i«' . !»' 'J V y 'c* 1.1, uir < » l» to to 1» S" "^r^r^2'^»15iT?to*to* rrtr * u t* « w •» I* * 12 &lty GRAVEL (GM) brown medium dense damp fine coarse grave) cobbles, hydrocarlMn odor (from cuttm Same as above, 0-5% lines Silty GRAVEL (GM) brown medium dense damp 0-5% fines fme to coarse gravel oobbles hydrocarbon odor Clayey SILT (ML) black, soft «rat, 0-5% fine sand hydrocarbon odor roots Clayey SILT (ML) gray soft wat, 0-5% fine sand hydrocarbon odor roou, 990 Clayey SAND (SC) gray with green motding loose wet lines, firM to medium sand roots ' • ' I ' ' ' I ' • ' • ' ln»Ridiu( 0 2 4 S Continues !)f Paul Hubickey Drilling Company PCExplantion Up- LeghBeero DrIUing Method. 100" Hollow stem auger iuDed. 9/24/90 Driller Dave Mott 4c Eddie WtQHeadCoonpleticn. Type of Sampler TD (Total D^) Quisly box k locking cap rspUtbaiTd 18£fL moN il*iiln(diaitiiS ____ ktfiwiiiid - — — Duliadwk0t«aeBtiln Wr/r/ Hiriaii»< i»twii SIBHUUMI MR Wtfowwy NA NaAatfyad ' iliMlyia Boring Log and Well Completion Details MONITOR MW-124 (Bonng B-124) WELL 124 Chevron Marketmg Terminal 124 Salt UkeOty, Utah ^WESTERN GEOLOGIC RESOURCES. INC. 17-00805 PC 12 MSend. 14 Oir stoned • 1^40 PVC cumQ 16 18 PVC Cap Slough 12 GRAPHIC LOG DESCRIPTION Clayey SAND (SC) gray with green mottfmg loose wat line sand roots 14 16 18 20 20 22 22 24 24 26 26 i%j%"».i»*«ji«*».i»*»' '•j«'»"«"»ji»j»*».i»j l%.1«1»»»J«1»»»^**»J l»l»^»»»J»«»"»J%.»%; »»•»•»»»•»•»•»*»*«" »•»•«.»• I 1 1 t 1 I t t I _*_*_*k*l.*V*to>*k*_' SANO (SW) gray, medium dense wet 0-5% fines fme to coarse sand, 0-5% gravel, hydrocarbon odor, roots Same as above SAND (SW) grey, medium dense, wet 0-5% tines fine to coarse sand. 0-5% oravet. hydrocarbon odor, roots Silty SAND (SM) gray medum dense wet 0-5% day Una to coarse sand. 0-5% gravel TD^ISSfL KTION HMkundwlMRi NA NMAMlyiid Bonng Log and Well Completion Details MW-124 (Boring B-124) Chevron Marketing Terminal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES.INC. MONITOR WELL 124 17-00805 PC GRAPHIC LOG Chnttybox-^ tbdungeap Grput B«n»nM pellet seal DESCRIPTION 4-SCh40 - PVC eatmo tt Sand—• OiO'sloned- •g pr».peck»d 4'/r PVC easng 10 12 SKS-30« 1SS0 8 10 12 Asphalt sisst IKE Silty GRAVEL (GM) brown 0-20% fines 0-30% sand hytkoearbon odor, (from cuttings) Silty CLAY (CL) black, soft, damp hydrocarbon odor abundant roots Silty CLAY (CL) gray, soft, wet, hydrocarbon odor, abundant roots Gravelly CLAY (CL) gray, soft wet, 20% fine to medum gravel, hydrocarbon odor I I I I I iRadM 0 2 4 S • Continues k Paul Hubickey Leigh Beem 9/30/90 Drilling CcDipeny PC Exploration Drilling Method. U'HoOowetcneuger DriUcr JayHulaeltDean WcH Head Cboipleticn. Ouisty box 4 loddng cap TypcofSemplcr 2*spUtbencl TDCTotalD^) SOOft NATION {rMaif«R|4rtninf nilli(BaflM*4¥nn idiuitiiid - - - DuMwkoi WW/ Hiduindwko* NA MaAMlyBd iJiMljiik Bonng Log and Well Completion Details MW-125 (Bonng B-125) Chevron Marketing Terminal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 125 17-00805 GRAPHIC LOG DESCRIPTION — • u u u w . !l w u] Silty SAND (SM) green-gray medium dense wat 0-30% -jrjrjr<rjfjrj?j^iw» fc» to coarse sand hf^ocartion odor wscai PVC Cap 0 2 4 S S 16 18 20 22 24 26 l-_kl.bkbU^ |_l.kUJkUL.to.k I. k u w ^ u . ' r ^ 'Z'Z' Ukuuku;.!. 1— kkkk.kfc kkk>kk_k Same as above gray Silty SAND (SM) gray, medum dense wet 0-30% tines, fine to coarse sand hyd'oearbon odor vertical rootlets TD9200ft. InoN Bonng Log and Well Completion Details MONITOR ll • faMwXnim pfcaMWilwiB MW-125 (Bonng B-125) WELL K OMlMdwlMrtaMUta ^•yli Biliil '/////A KtAant*kmpt4Moail Chevron Marketing Terminal 125 MR NvXiBRMiy Salt UkeQty,Utah W NA NctAMt^ W NA NctAMt^ 1 WESTERN GEOLOGIC RESOURCES. INC. 17-008i)5 PC GRAPHIC LOG DESCRIPTION Chfisiybox—( ibdiingcsp 4 ^^40 '2 PVC eung aes«id- 010-stoned- pre-packed 4'/rPVC estng 10 12 Ze-30-so 10 12 4S7 S10 Asphalt . to to .» 1^ to to to to ^fk " If •» 4 4 •» •» f" * **to*totototo*to . . to to SOty GRAVEL (GM) brown dense damp 0-20% fines fme sand to ooarsa gravel, cobbles hydrocarbon odor (from cuttings) Same as above • •••• ••• • • • • • • • * Silty CLAY (CL) dark brown stifl, moist, 0-5% fine sand hydrocarbon odor, abundant roots Same as above ncreasemg fmes Same as above, wet ^ 7 0' Silty CLAY (CL) darf( brown, stiff wat. 0-5% fine sand, hydrocarbon odor, abundant roots Clayey SILT (ML) green-gray with black mottling stff, wet 0-20% fine sand 0-5% gravel • ' • ' I ' • ' I ' • ' • I • ' Ml Radu 0 2 4 S S Continues Paul Hubickey Drilling Canpany PC Exploration LdghBeem Drilling Method. 14'Hollow stem auger 9/29-9/30/90 Driller JayHulae Wen Head Conptetian. Ouisty box 4 ioddng c^ TypeofSempler rs^tbaird TD (Total Depth) 193 a »JATION d*iita|4i«llln( inUdwteitonitii MMZ/y HaduindtHMfindMISMl NA NtlAMtiBd Bormg Log and Well Completion Details MW-126 (Bonng B-126) Chevron Marketing Terminal Salt Lake Qty, Utah iVESTERN GEOLOGIC RESOURCES.INC. MONITOR WELL 126 17-00805 PC GRAPHIC LOG DESCRIPTION Chnrybox tbddngeep Btntonite pMetSMi 4'»<n40 - PVC casing MSand—I 0 iCsiotwd- p<»-padi»d 4 4«'PVC casing : 10-is-so 10/tO 6 8 10 12 ^^^^^^^^^ I Asphalt jSSSSSSSS r.'-.'fti.iTiS: >• « to to « to to' ise to to to ^ ^ ' to- to to to' •rrr to to . . to to to tototototftotoA IT if' » » » to to If to tolT . ^ to to to * to ^' to . to' . to to to « to' to to' to nytryy 1J'JJ4J4«1. w, » » to y » to » » to >/trvvvyr • to to to to to' to to •«»«*• MS to ^ to > to • to .I'to'VL"^' U. k A A A* .to.>^totototo^k TTiTto^s^^rtnT u'V W'JV > « to to' to > to &lty GRAVEL (GM) brown, dense to very dense Ary 0-15% fines fine sand coarse gravel cobbles hydrocarbon odor, (from cuttings) Silty GRAVEL (GM) brown dense to very dense dry 0-5% fines, fine sand ooarsa gravel cobbles hydocarbon odor 2* diametor rock m sampler no recovery Clayey SILT (ML) gray, medum sbtf wet, 0-15% sand fine gravel, hydrocarbon odor, large roots Clayey GRAVEL (GC) gray, medium dense wet fine sand, coarse gravel Clayey SILT (MLVsilty CLAY (CL) gray soft wet 0-10% fine gravel, large roots I I I I I I I MiRadui 0 2 4 I • I s s Continues •Paul Hubickey Drilling Company- PCExpIaration Well Head Compleliaa Christy box 4 loddng cap •nLti^ Been Drilling Method. UST HoQow alem auger TypeofSempler ra^band PK/15-10/16/90 Driller Trait TD (Total Depth) 19i)fL NA NttAMlgrMd Bonng Log and Well Completion Details MW-127 (Bonng B-127) Chevron Marketing Terminal Salt UkeOty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 127 17-00805 12 teSand- OiO'stoned- pr*-pecked 4*yr PVC easing '14 16 [ _ PVC Cip • 18 Slough ft 11111111111111111 MiRatfM 0 2 4 S S 20 22 12 GRAPHIC LOG DESCRIPTION Clayey SILT {ML)/silty CLAY (CL) gray. aoft. wot 0-10% fine gravel low est K, large roou 14 16 1— k_k___kl i_kkkkk_kl kkkk^^kk kkl^_kkkk Mi \ I— kkkkkkkk. kkkkkk^kk l_.kkk^_kk as4i 18 _ SJ( 20 22 24 26 .k_kkkkkk k^ k k k^ k k k .^kk^k^kk .kkk — k — Sitty SAND (SM) gray, toose to medum dense wet fine to medum sand Same as above, SILT (ML) interbeds Same as above flowing sands between 170-175 TDe>19 0fL loU '////// tbAunrf wteit piMoMl (kydnulic SBBAaOMgr) NR No MBDWHy Bonng Log and Well Complefaon Details MW-127 ^nng B-127) Chevron Marketing Tenninal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 127 17-00805 PC 010* sloned pr»-packed 4'«- PVC eaing 10 12 : 10-1M0 240 10 12 GRAPHIC LOG DESCRIPTION •••••'•^•1 Silty GRAVEL (GM) brown dense, dry. 0-15% fines fine sand, fme to coarse gravel, cobbles (from cuttings) ^^^e»e»e"ee'^^» . to "to to V to V ' V H to to » If to to to to^ ^totolftotolfto » to ^ to to'to; to i k__kk.kk I_l kkk'kC 1601 U U if 1^ to| * to' > W ^' to ^ to if to ^ to' « to* i t w* w". w-w. w. w. W" S2eE •J '»•••»•» •••»/!• •».•»' f »•«.•» •».•»•» •»J!»«»J h A.A & A Sandy SILT (ML) brown soft to medium stiff, damp fine sand, 0-10% gravel, mnor roots &lty SAND (SM) brown, medum dense, damp 0- 5% fine gravel, fine to medium sartd Clayey SILT (ML) black soft, wet hydrocarbon odor (jravelly SAND (SW) tan loose to medium dense wet fine to coarse sand, 0-25% fine gravel Same as above increasing gravel, flowing sands @ 10 0 0 2 4 S S Continues ! Paul Hubickey Drilling Company PC Exploration Wdl Head Completion. Christy box 4 loddng cap f LeghBeem Drillmg Method 140" Hollow stem suger TypeofSempler 2*a^tbaTTcl lat 10/10/90 DriUer Jey Hulse 4 Dallas TD aotal Depth) 183 a knoN l«M|di«Ilii4 SoUdwhmmin faui^wlwiO DBmdwto»n|]iMl»«ii n^'f^ - '- - CkaMwkmvaeBUlii 1 ^ W///y H^uindwtNRBieniaMl r^^^^ NR NoBiBDWHy P NA NolAail^ Bormg Log and Well Complebon Details MW-128 (Bonng B-128) Chevron Marketmg Tenrunal Salt Lake Qty, Utah MONITOR WELL 128 knoN l«M|di«Ilii4 SoUdwhmmin faui^wlwiO DBmdwto»n|]iMl»«ii n^'f^ - '- - CkaMwkmvaeBUlii 1 ^ W///y H^uindwtNRBieniaMl r^^^^ NR NoBiBDWHy P NA NolAail^ 1 WESTERN GEOLOGIC RESOURCES. INC. 17-00805 PC •) 12 et Send — Oicrtloi»d pie-pa^ed r/rPVC casmg 14 16 16 PVC Cap- 12 14 16 18 I I 1 1 I I I 0 2 4 S S 120 20 22 24 26 GRAPHIC LOG A A k A .A A M k A ^ A . A • A . A Gravelly SAND (SW)tan coarse sand, fine gravel DESCRIPTION lium dense wet fine to TD9ie5fL Bonng Log and Well Completion Details MONITOR b Dotad wkmifprailBiM MW-128 (Boring B-128) WELL ^ OMMwhaiMMMto mmik' vyyy/y tUiuia^wtenpaSMoMl Chevron Marketing Terminal 128 Salt UkeQty, Utah K NA N«ABd)«d WESTERN GEOLOGIC RESOURCES. INC. 17-00805 PC ««nw) GRAPHIC LOG I I I 010* slotted pre-packed 4'«- PVC easing 10 [12 : 10-s-io 430 10 12 SSSSSSSSS SSSSSSSSS ^' « to to to to to t * J to to' to to' % to to •t I' 'y to *f to to to to [t, to K •» to to to u A to' to' li* ^ .'to to to to 1 f* . to to to to to t ' Ifl J to . to to to to 1 r - ' ** to . XXX3 to 7 SS4 ;»/l W. Wi »/l Wl »ii L«r.«/i«/>,«/'.<A»/'.«/'.v.w; DESCRIPTION Silty QRAVEL (GM) brown, dense, dry 0-15% fines fine to coarse sand fine to coarse gravel cobbles (from cutBngs) SILT (ML) brown (black staining 93 ft.), madum stiff to stiff, damp, day Sandy GRAVEL (GW) brown with black stainmg medum dense wet 0-10% fines fine to ooarsa sand, hydrocarbon odor Gravelly SAND (SW) tan, madum dansa, wet fine to ooarsa sand fine to eoarsa gravel Ll I I I I I I I I I I I I I I I MiAidw 0 2 4 S S Continues 1 Pful Hubidcey \ LdghBeem it 10/9-1O/1O/9O Drilling Company- Drilling Method. DriUer PC Exploration 14 0* HoDow slam auger Jay Hulae 4 Dallas Wdl Heed Completion. TypeofSempler TD (Total Depth)- Ouisty box 4 loddng rspUtbemi 183 ft TON Cant NA H^htOfm* Bonng Log and Well Completion Details MW-129 (Bonng B-129) Chevron Marketmg Terminal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES^JNC. . INC. MONITOR WEa 129 17^05 17-008 ns f PC i16 PVC Cap- 12 14 16 18 C 2 4 S S 20 22 24 26 GRAPHIC LOG DESCRIPTION Gravally SAND (SW) tan, madum dense, wet fine to ooarsa sand, fine to ooaraa gravel .e.e.eLe:e.e.e.e.ej i%»%'«*»j»'«"».i«"»j I .A .A .Jk ^ hi. £A . ^ |»^»J*.?»»'»^*/*^V»J _, w; wi «<; wi wi wi »^»/; '%•».»» •«/i%i»*»»%.»»j '*•*•%•%•»•»•»•»•» Same as above, flowmg sands at 17 ft TD^ieSfl vy/AV Hidiun4wkm(ii4MbMl NA NatAMtyvd Bonng Log and Well Cbmpletion Details MW-129 (Bonng B-129) Chevron Marketmg Terminal Salt Lake Oty, Utah WESTERN GEOLOGIC RESOURCES . INC. MONITOR WELL 129 17-00805 PC Chfliry box (Mungeap Grout' 0 icr tlon 4 pr».picfc*d 4«-PVC eating |10 :ifr»ao _ ess 6 10 I I 1 I I 12 I I I I I GRAPHIC LOG sssssssss sssssssss S3SL » to to .* to ^ to • ^' . * to to ^ to to « to' It to L ; - -,t H 1, 1» J to' • to to u to Ir to .t to I !• to to A' J J 1* 'f - >t . to to J to U A * ^ - - - t • ^ to A « * • » A t -« J to to to^ a - •* >• •» » . to - -« If * to « to to It « • ^ » to V to'. >«•. * >* U w r !* i* to* « « J to to .kfe>I.UU__ • UUUW^.kl. . I.'. _ u u' - w u DESCRIPTION Silty GRAVEL (GM) brown dense dry 0-20% fines fine to coarse sand, fine to coarse gravel cobbles (from cuttings) Sandy SILT (ML) black sdff, damp fine sand sfrong hydrocarbon odor Same as above Sandy SILT (ML) gray with black staining medium stiff, wet firwsand fine gravel, hydrocarbon odor Same as above Stity SAND (SM) gray with black moniing medium dense wet, 0-20% fines, 0-10% fine sand, gravel hydrocarbon odor Same as above no gravel minor roots kitfiFUdM 0 2 4 s a Continues Ptul Hubickey Drilling Ccmpeny- P C Explorstlon Todd Daniels Drilling Method. UC Hollow ston auger 10/9/90 DriUer Jay Hulae 4 Dallas Wdl Heed Completion. Qulsty box 4 lod^g cap TypeofSempler r^beirel TD (Total Dqpth)- 185 ft ION IwtS Cana Solid - — - DuM wkci* lueoudB 'y/yyy/ {bduuttf wkm imdMtoMl NR NoR^flwwiy NA NMAaiiyad Bormg Log and Well Completion Details MW.130 (Bonng B-130) Chevron Marketing Tennmal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 130 17-008 05 GRAPHIC LOG DESCRIPTION 12 nSand 16 PVC Cap 18 I I I MhRadlui 0 2 4 S S 20 22 24 26 1W W U U C b fa. b w L— d u^b b^w b b jkf lb b b b b b .b b b Silty SANO (SM) brown loose wet. fine to nttrbedded silt lenses, roots coarse sand. SAND (SW) gray, looaa, wet. fine to ooarsa sand flowing sands TD9 185IL l(Mb| CaitKke t •• aoUd WIMUMIUM Boring Log and Well Complebon Details MW.130 (Bonng B-130) MONITOR WELL Dottid wtiiR ipprariswtt - - - OuMwiMiciiaanitB 130 katM 'W/y/ HjdiundwIwiv^idMDMl 1 NR No SfOMwy [ NA HattM^ptA Chevron Marketing Terminal Salt Lake Oty, Utah 1 WW katM 'W/y/ HjdiundwIwiv^idMDMl 1 NR No SfOMwy [ NA HattM^ptA WESTERN GEOLOGIC RESOURCES. INC. i7-on«n«? PC Chiwtybox—^ IMungcap Oinionhe ptiMseal 4-td)40 M PVC casmg nSand—a OKTstooed- prt-padied fif PVC I 4 esiing M0-1140 S39 10 12 GRAPHIC LOG DESCRIPTION • .•••••••.•i stity GRAVEL (GM) brown, dense, dry, 0-20% fines fine to ooarsa sand, fine to coarse gravel, oobbles (from •H. t » »» ¥ "t. •a* to* to to* ^ m t . to' to I rrar ' •-• 't. •'»- * .^^ • S.0 "rtr . to' .. w. : _ ••b*b-b*b*b-_ b* 1. J. ~*»*-.*_*_*_*»*»*b' I t t t t I «***«totol : I I > I t 1 .•'b-'b-.-'b-L-'b-L--- *._*b*^'_rb>b*b' —*— _*_-_*b*b*»' WSJiSJiW'VS' outsngs) Clayey SILT (ML) brown, sbtf to ve7 stiff, damp 0-10% fine sand Same as above Silty SAND (SM) brown loose wet, 0-10% fines fine sand Clayey SLT (M.) b>own with yeOcw brown motding soft, wet Silty SAND (SM) brown, nwdum dense dry. 0-10% fines, firw to ooarsa sand, yellow silt lenses throughout Same as above Gravelly SAND (SW) brown very dense wet fine to coarse sand, 0-20% fine gravel UU I I I MiRidw 0 2 4 s Continues m Paul Hubickey m Todd Daniels ^ 10/11/90 DrilUngCompany PCExpIaration Dnllmg Method. 14 0" Hollow stem auger Dnllcr Icy HuIsc 4 Dallas Wdl Head CbmpMon. TypeofSempler TD (Total D^th) Oufsty box 4 locking cap rsf^tbencl 18J ft DN i«na DuMwImiuaiuto bmM W/yyy ttetutwrf wfcm (TidiUDiiil NR NoBiowtiy NA ItaAulyMd Bonng Log and Well Complebon Details MW-131 (Bonng B-131) Chevron Marketmg Tennmal Salt Lake Oty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 131 17^05 GRAPHIC UDG 16 .18 PVC Cap oescfyPTVDK Qr«MefSAMDt5«N)ta(TMn ^ «and;0^g%fa*9ML denaa wacfeato 16 18 I I I I I I ,1 I 0 2 4 S S £20 20 22 24 26 L«VSr.!r.5r.Ir.*!(i!(; I»»»*«*»'%'»*»«»"»J yyyy y yyyw TO g ia s n. |K)N e —SoUdwlMiaRila Bonng Log and Well Completion Details MW-131 (Boring B-131) MONITOR WELL ^3 Doittd W^fn AppivclMMt B * —' OkalMd %vlMR UMRaki i Qi ^9 No VMWvy m NA NAAMdbnid Chevron Marketing Terminal Salt UkeQty, Utah lol ^9 No VMWvy m NA NAAMdbnid WESTERN GEOLOGIC RESOURCES.INC. 17-008 05 PC CTirttty box-l tlodungeap ^ GRAPHIC LOG SSSSSSSSS sssssssss sssssssss DESCRIPTION •eSand .020-stoned- 4'Kh40 ~g PVC casmg 10 12 ;B-2S« 1246 10 12 Asphalt ^ to' to « Vto^^tftoto^a « to * A « A A to A e» to to 1 Sandy GRAVEL (GM) brown, dense damp 0-20% fines fine to coarse sand, fine to coarse gravel, oobbles, hydrocarbon odor (from eutbngs) Same as above SILT (ML) black soft, damp, hydrocarbon odor, roots Clayey SILT (ML) gray, medium stiff, damp hydrocarbon odor Silty GRAVEL (GM) gray, medium dense wet fines fine to coarse sand, fine to coarse gravel hydrocarbon odor Gravally SAND (SW) gray, loose to medum dense wet 0-15% fines, fine to coarse sand, fine to coarse gravel hydrocarbon odor 0 2 4 e Continues Paul Hubickey Drilling Company PCExpIaration LdghBeem Drillmg Method. IOC Hollow stem atiger 9/22/90 Driller Dave Mott 4 Dean Walton Wdl Head CompMan. Outety box 4 locking cap Type of Sempler r apUt bend TD (Total D^th)- 16J ft HR No RflOOT^XJT NA NoiAiidjnd Bonng Log and Well Completion Details MONITOR MW-132 (Bonng B-135) WELL 132 Chevron Marketing Terminal 132 Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. 17-008 05 e«!l!^ GRAPHIC LOG 12 seSand- i>2(rsloaid- 4*SCr\40 PVCcasng 14 PVCC^- 12 14 Stough- 16 16 1111111 kidi Radius I I I 1 I I I I 0 2 4 S S 18 18 20 20 22 22 (24 24 126 26 L*.e.v.e.«.«.e.«.e^ L*r.*.Jr.ir.«/iSr.Jr.ir.Jf .v.sr.w.v.v.v.w.w.** t.sf St St it St it it it it, \>t»ttf»t>ttrtt>ftt. 141 1 I I 1 t I 1 DESCRIPTION Gravelly SAND (SW) gray, medum dense wet 0-10% fines, fine to coarse sand. 0-20% fine gravel hydocarbon odor, flowng sands 9 12 fl Same as above Sdty SAND (SM) gray medum dense, wet fine to coarse sand, 0-5% gravel, hydocarbon odor TD«16.StL ION idrlUni Dsttid when BppfBllBKlB »M/yy H»itmd WKCT pwltttcMl NR Wo Reow^fy NA NetAailyBd Bonng Log and Well Completion Details MW.132 (Bonng B-135) Chevron Marketing Terminal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 132 17-00805 PC GRAPHIC LOG DESCRIPTION Chnrybox-* Stodungeep 2 Bemonit* 4 t^40 - PVCcBiinp sesw4- XiCtioaed- »*40 I 6 PVC casing no ; S-2Z-S0 _ MM 8 10 I I I I I I I I 1 I 1 LJ totfinidlu* 0 2 4 S 12 Asphalt SSSSSSSSS NSSS.TihS.-»S $;5SS5SSSS iSSsSSSSs^ 47S i^/',y.«r.s^>r ^«r.*rw NR y ^. ^, y.vr.y.ir.y.ii.Jiiir.i; St ,y.>r,V.5r!rV.Ir.Vl .yy.y.y.y.y.y.y.sr '»•%/•*«/••••»•*•»' Svidy GRAVEL (GM) brown, dense damp 0-20% fines fine to coarse sand fine to ooarsa gravel cobbles hydrocarbon odor (Irom cutengs) Same as above Silty CLAY (CL) gray with black motting, stiff damp 0-15% fme sand Q'avelly SAND (SW) gray medum dense wet 0-15% fines fme to coarse sand 0-25% fine to coarse gravel hydrocartran odor Same as above Continues Psul Hubickey Drilling Cbmpeny PCExplorshon Legh Beem Drillmg Method. 10 0* Hollow stem euger 9/2/90 DriUcr Dave Mott 4 Deen Walton Well Heed Completion. TypeofSempler TDfTotalD^) Christy box 4 loddng csp 2* qpkt barrel 143 ft Bonng Log and Well Complebon Details MONITOR MW-133 (Bonng B-136) WELL 133 Chevron Markebng Terminal 133 Salt UkeQty, Utah 1 WESTERN GEOLOGIC RESOURCES . INC. 17-00805 GRAPHIC LOG 12 fSSand- OICTslooed* Stfi40 PVCeaainQ 14 PVC Cep - 12 14 ~ 0 2 4 S 16 16 18 18 20 20 [22 22 124 24 126 26 •.•.•.e.e.e, ICJ»J«^%J»J«*«i«»»" hAst.^t^^St.St.st.stSt, ^/L^.^.it.st.st.st.st.st. L<y.y.y:»:».y.y.>d TP ft 14 s it DESCRIPTION Gravally SAND (SW) gray, madum dense, wet 0-15% fines, fine to ooarsa sand, 0-25% fine tt coarse gra\»l nycvocvDon ooor blON Bonng Log and Well Completion Details MONITOR Lh|4iUlat CoMMK 1 e>UdwtmCB«ta aanrMwd MW-133 (Bonng B-136) WELL K DuUdwkmiumulB torbMM V^////. KKfcuntwhmir^MoMt Chevron Marketmg Tenninal 133 Salt Lake Gty, Utah 1 NA NMAwlyae PC ««nM GRAPHIC L(X3 DESCRIPTION X20r iionsd- PVCcasng fSSind — 'S-2340 'sos 10 12 s» 1 Asphalt ^^^^^^^^^ sssssssss J^ISSSSSSA LiSSShShSSS Sandy GRAVEL (GM) brown, loose to medum dense damp, 20-30% fines, 10-20% fine to coarse sand hydrocarbon odor (from cuttings) Same as above Silty CLAY (CL) gray with black mottling medum stiff damp to moist 0-5% fine sand, liquid hydrocarbons visible n shoe 1 ( _-_-_.b-b-b--.-- Silty SAND (SM) gray-green, medium dense wet 0-20% fines, 0-50% fine to ooarsa sand. 1-5% fine to ooarsa gravel SAND (SW) green-f^ray with brown mottling wet loose to medum dense 0-5% fine sand Lb .J-LJLJ 0 3 4 a Continues i Psul HubKkey Drilling Company- PCExploratton Lsgh Beem Drillmg Method. 10 0* Hollow stem auger 9/S/90 Driller Dave Mott 4 Dean Walton Wdl Heed Completion. Oiiisiy box4k>ckingcap Type of Sempler T split berrcl TD (Total Dq>th) 160 ft SpUwtefic Dottirf st%ts9 A|ipfprini4ti - — - DutMdwkMuaeeuU W/y/y HadumdwhoipidittQMl NA NolAMlyMd Bonng Log and Well Completion Details MONITOR MW-134 (Bonng B-137) WELL 134 Chevron Marketing Terminal 134 Salt UkeQty, Utah WESTERN GEOLOGIC RESOURCES . INC. 17-00805 GRAPHIC LOG DESCRIPTION 12 esSand' .020* Slotted'' teh40 PVCeasng 14 16 PVC Cap • 12 14 0 2 4 « 16 18 18 120 20 t22 22 24 24 126 26 I^^JF^jj^j^j^ SAND (SW) green-gray with brown mottling loose to medum dense, wet 0-5% fines fine to ooarsa sand Ist^st.stst.st.st.st.st.st, t y.y.y.y.y.y.ir.y.wi .st.^.st^.st.st^.st.st V.y.VLy.y.y.yy.y .y.y.y.y.y.y.y.y.y . y. *A y. yr y, I. ll i in !• 1- In TD^IBOtt Bonng Log and Well Completion Details MONITOR MfchiUJillliKS CaMKK Solid Mhiii SMitti 1 DtMid whm appmSntt MW-134 (Bonng B-137) WELL — — — DukadwkatueBMla uyyyyy HadtundwkmpiditlHul Chevron Maiketmg Terminal 134 NR No XM^W^ Salt Lake Qty, Utah NA NttAaai^ Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. | 17-008 05 PC GRAPHIC LOG DESCRIPTION Chntty box- Slodungt •8 Sand—i oicrsiotud- pr*-pack*d 4'«' PVC eaaing 10 12 iD-is-go i2ao 10 12 sSSssssss SSSSSSSSS to to to to to to to to to •* * . to to to % to 10 « 1« l» to l» If l» I* I*! to < to to to to' to to' 1 GRAVEUCOBBLES (fi») Silty GRAVEL (GM) brown dense, dry to damp 0-15% fines, fine to ooarsa sand fine to coarse gravel cobbles Clayey SILT (ML) black medum s&lf to sBff. damp 0-10% fine sand, hydrocarbon odor Silty CLAY (CL) black wet, 0-15% gravel bqutd hydrocarbons presant Clayey SAND (SC) brown with black staining wet fine to coarse sand 0-15% fine gravel hydocarbon odor I I, I I 1 I I I I I I I 1 I I I I kchFtadw 0 2 4 S S Continues t Paul Hubickey p- Todd Daniels hi 10/16/90-10/23/90 Drilling Company Drillmg Method. Driller P C Exploration 14 0* Hollow stem auger Trent WeU Heed Completion. TypeofSempler TD (Total Depth) Qiristy box 4 locking cap 2'S{^t berrcl 17J ft ItatfdtlUIni Cona Bonng Log and Well Completion Details MW-135 (Bonng B-148) Chevron Maiketang Terminal Salt Lake Oty, Utah WESTERN GEOLOGIC RESOURCES^IN MONITOR WEa 135 l7.Ai«n«; PC Chnity box (lediing saStnd- Otrslosed- prs-pscfced 4«-PVC euing 10-is-n 10 12 GRAPHIC LOG DESCRIPTION y'w'wTi^ GRAVEUCOBBLES (fiH) rt to kf to; to to' ^ If' _ V to to to'ytTto'^ aity GRAVEL (GM) brown, dense dry to damp 0-15% fines fine to coarse sand, fine to ooarse gravel oobbles Clayey SILT (ML) black, medum stff to stiff damp 0-10% fine sand, hydocarbon odor Silty CLAY (CL) black, wet, 0-15% gravel liqud hydrocart>ons prasent II Clayey SAND (SC) brown with black staining wat fine to ooarse sand, 0-15% fine gravel hydrocarbon odor Ij.i I I I I. I I I I I I I he^Radka 0 2 4 s S Continues WM Hubickey Drilling Company- PCExploratton Wdl Heed Completion. Quisly box 4 loddng ap poddDsniels Drilling Method. UXT Hollow stem auger TypeofSempler r^iUtband p/16/90-10/23/90 Dniler Trent TD (Total Depth)* 173 ft CsnnaK — Solid wkmentiln DBtfd wrtwn sppraKliiHIi - * - Diilnd wli«n ii»ninl« W/yyy Haduuad wtm padMoMl NA NotAMlyaid Bonng Log and Well Completion Details MW-135 (Bonng B-148) Chevron Marketing Terminal Salt UkeQty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 135 17^ 12 MSand 14 16 PVC Cap- 18 miRtdui 0 2 4 s s [20 122 124 PC »pm» GRAPHIC LOG 12 14 16 18 20 22 24 26 DESCRIPTION Cleyey SAND (SC) brown with black staining, wet fine to coarse sand, 0-15% fine gravel, hydocarbon odor TD* 17.5 ft ION |diUtei| Solid whOTOfMlB »////// HKhuradwtMnpidMiaoil Mt NoKnovvy NA NaAatlywd Bonng Log and WeU Completion Details MONITOR MW-135 (Bonng B-148) WELL 135 Chevron Marketmg Terminal 135 Salt Lake Oty, Utah WESTERN GEOLOGIC RESOURCES. INC. 17-008 05 Christy box itoekng Silty GRAVEL (GM) brown dense dry/damp. 0-15% fines, fine to ooarse sand, fine to ooarse gravel 0-15% oobbles (from cuttings) GRAPHIC LOG DESCRIPTION !f'f'f%'f'yjtT? GRAVEL (GW) (fill) ^.•%SSJiSSSS ^^^^^^^^^ SS'?v-*S'?SS sssssssss 'A . to ^' » to to to' to . to » to < ^ to to' to/ MAAtoto'toAto rvvv;:'VV -U — — UbWb — — U — .--I ,bUWI.U_UUW ,bWU_U_W — fe toU__W_U. .UU..UWWWU Clayey GRAVEL (GC) gray, dense, wet 0-15% coarse sartd, fir>e to coarse gravel, hydrocarbon oda, bqutd hydrocarbons present Clayey SILT (ML) brown with black moding, soft, wet, 0-10% fine sand, loots Silty SAND (SM) gray , medium dense, wet 0-15% fines, fine sand, toM to roots Continues 1 Psul Hubickey Drilling Company PCExploratton Wdl Head Completion. Ouisly box 4 loddng ^ 1 ToddDanleb Drilling Method. 140* Hollow stem sugar TypeofSempler r^>UtbaiTcl i 10/16/90-10/23/90 DriUer Trent TD (Total D^) 190 ft ilirlMidwtll BE Ooood ivtafw ippfBdflwtB • ~ — - OuM wkmuMtradK BbvM 'yyyyyy H«etui»d wWw r****^**! HK NR No Kf^nwjT H NA NatAMlyad Bonng Log and Well Complebon Details MW-136 (Bonng B-149) Chevron Marketmg Terminal Salt UkeQty, Utah MONITOR WELL 136 ilirlMidwtll BE Ooood ivtafw ippfBdflwtB • ~ — - OuM wkmuMtradK BbvM 'yyyyyy H«etui»d wWw r****^**! HK NR No Kf^nwjT H NA NatAMlyad 1 WESTERN GEOLOGIC RESOURCES . INC. i7.«wn«» Mraeosd. •PVC PVC Cap- lis ^2;r2^r2 : zm- zm-zm- Z&tSz ZfZ^ zm m = fim = w»a = m% = = erera = m*i : Sera m ^ •' •' • LU 0 2 4 a s tfS^ GRAPHIC LOG 12 14 16 18 20 22 24 26 DESCRIPTION _ ^. _ ^. tZZZi ^0 (S*^) 8™y • 5% fines, fine sand, roots 51 .W k w ,w >. — u w^w y k k'k k k k k k k k k 1^ k k k k k- kk^kkkklik [kk^kkkkk^kk ^kk^kk^-kkkk H^,W k k k> k k •kkkkkkkk ik^-'k'k^ii'iik'k'k kkiikC'kWkk .kkkkkU^k • kkkkkki^k k ti^ k k k .kk.l^kkjUkk .kk'k'k<£'k_k ^f'^ !"!"*" I" I" !"'?^ ktik'kkk'k k li k''k k k .kk^kk^kkk ,k kkkkkkkk ^kkkj.^,kkk> ,kkkk_kkkk TD9190ft AVX//-/ Kaduindwkm NR No Rfloowny NA Na AMlyMd Bonng Log and Well Completion Details MW-136 (Bonng B-149) Chevron Marketing Terminal Salt UkeQty, Utah WESTERN GEOLOGIC RESOURCE PD GRAPHIC LOG DESCRIPTION Chnsty box • H tbdungeap Grout 2 4-sen 40 PVC casing Bentonite pellet sM ssSand- 0 10" ilotied pr».pack*d 4«-PVC casmg 10 12 10-ieao 10 ' ' • 12 SSSSSSSSS S7 GRAVEL/PEAGRAVEL Silly GRAVEL (GM) brown dense dry to damp 0-15% fines fine to coarse sand fine to coarse gravel cobbles (from cutangs) Same as above (Shelby lube sample collected Irom 3 5 ft to 6 0 ft) Clayey GRAVEL (GC) gray loose to medum dense wet fine to coarse sand fine to ooarse gravel liquid hy^ocarbons present Clayey SAND (SC) gray medium dense wet fine to coarse sand fine gravel ' • ' • ' metiRtfui 0 2 4 e s Continues tr Psul Hubtckey Dnllmg Cbmpany- PCExpIaration WeU Head Completion. Oinsty box 4 lodung cap NfT Todd Daniels Drillmg Method. 14 0* Hollow stem auger TypeofSempler 2'split beirel |««d. 10/16/90-10/23/90 DriUer Trent TD (Total Depth) 19J ft KATION H*ini\|dmiu>| ContaclB •rikconplnd Mil HP ~ — - DtalMd «r)icn luanat* piw^tMltd 'yyyyyy HKfcurad wtwRfiidMeail F NA N«AM)yad Bonng Log and Well Completion Details MW-137 (Bonng B-150) Chevron Marketing Terminal Salt UkeQty, Utah MONITOR WELL 137 KATION H*ini\|dmiu>| ContaclB •rikconplnd Mil HP ~ — - DtalMd «r)icn luanat* piw^tMltd 'yyyyyy HKfcurad wtwRfiidMeail F NA N«AM)yad 1 WESTERN GEOLOGIC RESOURCES. INC. PC GRAPHIC LOG DESCRIPTION 112 MSand — QirtlODid ' prt-pedied 4-/rPvc csang PVC Cap- :• I I I I I I I I I I I I I I I I I MHMUi 0 2 4 S S 12 14 16 18 20 22 24 26 Clayey SAND (SC) gray, madajm dansa, wet, coarse sand, fine gravel TD9195tt Selldwtaftc ~ - ~ OuM wkmnasBliai '/yyyyy Hiduind whm tt^jesMi MR No IssMwiy NA NaAaalyiid Bonng Log and Well Complebon Details MW-137 (Bonng B-150) Chevron Marketmg Temunal Salt Lake Qty, Utah WESTERN GEOLOGIC RESOURCES. INC. MONITOR WELL 137 17-008 ns MARKEHNG TT»MINAL MONITORING WELL CONSTOUCTION DATA I tkevelofawnt Date ittm Tenelnel #1290334 City, Uteh Wett Cenetructlen Deteile Uell Devcloptent Data eorlne 10 f eat* a tarlne •cptk (ft) Iteter level •urint OrlllIng (firat water ft) Well ID § Screened Intervel (ft) Date Uell Developed Totel Uell Depth Totel Ue CvectMted Well (getl B-101 12 tcpO 25 6.5 NU-101 7.5 - 15 13 SepBS 15.0 ... 12 SepBS 31.S 7.5 mf-102 8 0 • IS 14 Sep 83 15.0 ... •-10S 12 tcpSS 16.S 6.5 IW-103 5.0 - 15 14 Sep 83 15.0 ... e-iM 13 Sep 85 tf.O 7.0 Mil-104 3.0 • 12 14 Sep 83 12.0 — 13 SepSS 16.5 7.0 MU-105 4.0 • 15 14 Sep 83 15.0 — 10 Mer 86 11.0 6.0 MU-106 1.0 • It 11.0 ... w-m lONer 86 12.0 ... MU-107 1.0 - 11 11.0 ... B-108 toner 86 11.0 2 Mil-108 1.0 - 11 11.0 ... i-ioe lONer 86 11.0 • a * MU-109 1.0 - 11 11.0 —. ••110 10 Mar •6 11.0 • MU-110 1.0 • 11 11.0 —. •-111 10 Nar 86 11.0 ... MII-111 1.0 - 11 11.0 ... •-112 10 Nar 86 11.0 ... MU-112 1.0 - 11 11.0 ... ^yaraee Puipina eete (CPN) 17-008.05/T11IVO Mtl TMH.E 1. Well Cenetructlen Detalta end DevclofMent Dete (continued) Oievren Merketlne Teneinal #1290334 Salt Lake City, Uteh Uell Cenetructlen Deteile Well DevelofMient Det* water level Totel wetcr Borlna Date Berlne During Drllllno Welt Screened Dete Well Totel Well tvacueted Fr<« ID # Depth (ft) (fIret Mter ft) ID f Interval (ft) Developed Depth Uell (gellens B-113 15 i^r 87 11.5 3 MW-tl3 1.5 - 11.5 11.5 ... B-114 15 Apr 87 11.5 3 MW.114 1.5 - 11.5 11.5 ... B-115 15 Apr 87 11.5 a 3.5 NW-115 1.5 - 11.5 11.5 ... B-116 16 Apr 87 11.5 S.O MW-116 1.5 - 11.5 11.5 ... B-117 16 Apr 87 11.5 ... MU-117 1.5 - 11.5 11.5 ... B-118 16 Apr 87 11.25 ... MW-118 1.25 - 11.25 11.25 ... B-119 16 Apr 87 11.5 ... MU-119 1.5 - 11.5 11.5 ... B-120 16 Apr 87 11.5 MW-120 1.5 - 11.5 11.5 ... B-121 16 Apr 87 11.SS ... MU-121 1.3 - 11.3 11.3 —. B-122 16 4Hir 87 13.5 NW-122 3 5 - 13.5 13.5 ... B-12S 24 Sep 90 18.5 6.0 MW-123 3 - 17 27 Sep 90 17.0 73 . piii«>lng 17-00e.05/TlMV0.MCl limit 1. Well Cenetructlen Deteile end DevelopMcnt Oete (continued) Chevron Merketing Tenelnel #1290334 Selt leke City. Uteh Welt Cenetructlen Deteile Uell DevetcfMcnt Dete Boring ID f Beta 1 Borlna tepth (ft) water level During Drilling (firet Meter ft) Uell ID # Screened Intervel (ft) Oete Uell Developed Totel Uell Depth Totel Weter Evecueted froa Uell (gellons) Averege Pwplng Rete (GPM) B-124 24 Sep 90 18.5 7.0 MW-124 3 - 18 27 Sep 90 18.0 55 5.00 B-125 30 Sep 90 20.0 8.0 MW-125 (pp) 5 - 20 1 Nov 90 20.0 38 1.70 B-126 29 Sep 90 19.5 7.0 MW-126 (pp) 4 - 14 31 Oct 90 19.0 42 4.70 B-127 15 Oct 90 19 5.5 MW-127 (pp) 2.5 - 18 1 Nov 90 18.0 34 0.76 B-128 10 Oct 90 18.5 5.5 MW-128 (pp) 3 - 18.5 4 Nov 90 18.5 44 1.76 B-129 9 Oct 90 18.5 5.5 MW-129 (pp)' 3 - laT) 6 Nov 90 17.0 50 2.50 B-130 9 Oct 90 18.5 6.0 MW-130 (pp) 3 - 18.5 1 Nov 90 18.5 NA NA B-131 11 Oct 90 18.5 5.5 MW-131 (pp) 3 - 18.5 6 Nov 90 18.5 40 2.10 B-m 22 Sep 90 8.5 6.0 ... ---... ... ... ... B-134 21 Sep 90 8.5 6.5 ... ... ... ... ... ... B-135* 22 Sep 90 16.5 7.2 MW-132 5 - 15 ... 15.0 ... ... B-136 22 Sep 90 14.5 8.0 Mil-133 4 - 14.5 7 Nov 90 14.5 15 5 2 21 17-008.05/TlNVO URl TABie 1. Hell Cenetructlen Deteile end Developamt Oete (continued) Chevron Marketing Tenelnel #1290334 Selt Leke City, Uteh Well Cenetructlen Deteile Well Development Dete Water Level Boring Data Boring During Drilling Well Screened ID § Depth (ft) (fIret ueter ft) ID « Intervel (ft) Dete Welt Developed Totel Well Depth Totel Weter Evacuated Fron Well (gallona) Average Pisiplng Rete (GPM) B-137 23 Sep 90 16.0 B-138 22 Sep 90 9.0 B-139 22 Sep 90 9.5 8-140 22 Sep 90 9.5 •-141 8 Oct 90 8.0 8-142 8 Oct 90 9.5 8-143 8 Oct 90 8.5 B-IU 8 Oct 90 9.0 8-145 8 Oct 90 9.5 8-146 8 Oct 90 9.5 B-147 15 Oct 90 9.0 B-148 16 Oct 90 17.5 8.5 7.0 7.6 7.5 7.5 7.5 7.5 6.5 7.0 7.5 6.3 5.5 MW-134 6 - 16 7 Nov 90 16.0 44 4.00 MW-135 (pp) 3 - 17.5 6 Nov 90 17.5 15 1.00 17-00e.05/TlNV0.UKl MARKEIING TERMINAL WELL COMPLEnON SUMMARY TABLE 1 MARKETING TERMINAL WELL COMPLETION SUMMARY Casing Rim Elevations Well Screened Slot I Well Number Marketing Datum Refinery Datxam Depth (ft) Diameter (In) From (ft) To (ft) Size (in) 1 MW-101 99.29 4219.62 15.0 4 7.5 15.0 0.010 MW-102 100.78 4221.11 15.0 4 7.0 15.0 0.010 1 MW-103 99.A7 4219.80 15.0 4 5.0 15.0 0.010 X MW-104 99.38 4219.71 12.0 4 3.0 12.0 0.010 • MW-105 100.64 4220.97 15.0 4 4.0 15.0 0.010 • MW-106 100.58 4220.91 11.0 4 1.0 11.0 0 020 MW-107 98.77 4219.10 12.0 4 1.0 11.0 0.020 1 MW-108 99.01 4219.34 11.0 4 1.0 11.0 0.020 ^ MW-109 98.55 4218.88 11.0 4 1.0 11.0 0.020 • MW-110 98.50 4218.83 11.0 4 1.0 11.0 0.020 • MW-111 97.78 4218.11 11.0 4 1.0 11.0 0.020 MW-112 97.81 4218.14 11.0 4 1.0 11.0 0.020 1 S-22 94.90 4215.23 11.7 2 1.7 11.7 0.016 MARKETING TERMINAL ANALYTICAL DATA 1989 Analytic Results Groundwater Chevron Marketing Terminal Salt lake City, Utah Well ID f Date TPPH FC B PPb T E X 0 t G Org Pb Cd Cr Pb Zn IDS MU 101 10 May 89 19,000 Gas >1.111 >44* >67* 1,111 <3 0 <0 02 <0 001 <0 005 <0 OOS <0 005 HU-101D 10 May 89 6,000 Gas 4.100 190 86 UO — 400 <0 001 <0 01 0 013 0 019 MU-101 10 Nov 89 >5,400* Gas >860* <A«* >67* >120* 6 <0 02 <0 001 <0 005 <0 005 <0 005 1,100 MU-101D 10 Nov 89 11,000 Gas 3,500 100 180 460 MU-102 10 Nay 89 7,000 Gas 840 310 410 1900 — — — ... — HU-102 10 Nov 89 — — — — — — — — — — ... ... ... HW-103 10 Mey 89 100X LH/JF NA NA NA NA — 240 — — ... ... HU-103 10 Nov 89 — — — — — — — — — ... ... ... HU-104 10 Nay 89 100X JF 0 03 12 0 03 0 38 96 <0 001 <0 01 0 016 0 029 NU-104 10 Nov 89 — — — — — --— — — — — — MU-1D5 10 Nay 89 soo SS 0 4 <0 2 <0 2 <0 4 <3 0 ... ... ... ... MU-10S 10 Nov 89 480 SS <0 S <2 0 <0 5 <1 0 3 <0 02 <0 001 <o oos <0.00S <o.oos 990 MU-106 10 Nay 89 14,000 Gas 740 190 20 3700 23 ... ... ... HU-106 9 Nov 89 18,000 Gas 3,800 500 360 3.100 <0 02 0 17 0 17 0 22 0 19 NU-1060 9 Nov 89 19,000 Gas 3,100 370 310 2,100 HU-107 10 Ney 89 100X LH/JF NA NA NA NA 250 — ... ... HU-107 10 Nov 89 4,800 Gas >270* 12 94 70 6 <0 02 <0 001 <o.oos <0.00S <o oos 1,700 NU-107D 10 Nov 89 S,000 Gas 320 17 120 100 1,700 NU-108 10 Ney 89 100X LH/JF NA NA NA NA ... 630 <0 001 <0.01 0 020 0 038 NU 109 10 Nay 89 <100 Gas 0 7 0 7 <0 2 <0 4 ... ... ... ... ... NU-109D 10 Nay 89 <100 Gas 0 8 0 7 <0 2 <0 4 — — ... ... ... ... NU-109 9 Nov 89 300 Gas 92 10 0 7 21 5 <0 02 <0 001 <o.oos <o oos <o.oos 1,600 NU-110 10 Ney 89 2,000 Gas 0 3 1 1 90 120 5 ... ... ... ... ... NU-110 10 Nov 89 <100 Gas <50 <50 20 30 8 <0 02 <0 001 <0 005 <0 005 <0 005 1,700 HU-1100 9 Nov 89 1,800 Gas <0 5 4 0 17 0 3 0 MU-111 10 Ney 89 100X LH/JF NA NA HA NA ... 630 <0 001 <0 01 0 009 0.046 MU 111 10 Nov 89 — — — — — ... — ... ... ... ... ... NU-112 10 Nay 89 100X LH/JF NA NA NA HA ... 630 ... ... MU-112 10 Nov 89 15,000 Gas 3,000 250 310 600 6 <0 02 <0 001 <o oos 0 oil <0 005 1.200 008T1NAO UPS Analytic Raautta* Groundwater (continued) Chevron Marketing Ternlnal Salt lake City, Utah HOTES TPPH > Total Purgeable Petroleun Hydrocarbons FC = Fuel Characterization B " Benzene T " Toluene E •= Ethylbenzene X • Total Xylenes 0 4 G « Oil and Grease Org Pb • Organic Lead Cd ' Cadkiium Cr > Chramiun Pb > Lead Zn • Zinc TPS - Total Dissolved Solids ppb > parts-per billion ppi * parts-per-nillion SS • Stoddard Solvent LH/JF > Liquid Hydrocarbon/Jet Fuel NA > Not Applicable * > Satureted peak, use results frcM duplicate 008T1MA0 WPS