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HomeMy WebLinkAboutDSHW-1995-005161 - 0901a06880366865Comprehensive Monitoring Evaluation Hercules Aerospace Company Space/Strategic Propulsion Bacchus Works UTD001705029 Prepared By State of Utah Department of Environmental Quality Division of Solid and Hazardous Waste 21 March 1995 Executive Summary In September 1993 Hercules Aerospace Company Bacchus Works was subject to a Comprehensive Monitoring Evaluation (CME) A CME is a detailed analysis of the facility s operational history and its groundwater monitoring system The evaluation found that the groundwater monitoring system met all of the requirements as outlined in the regulations The Division of Solid and Hazardous Waste (the Division) has recognize some areas where some changes or additional work are necessary the recommendations will be to Hercules under a separate cover It should be noted that the ownership of Bacchus Works has recently changed hands Alliant Techsystems Inc notified the Division that the Bacchus Works were changing hands on December 2 1994 The sale of the Bacchus Works became final on March 1995 Hercules retained ownership of the Plant 3 operation and is currently closing HS-3 the interim status hazardous waste storage area within Plant 3 s boundary The closure plan is undergoing a 45 day public comment period which ends April 4 1995 It is expected that the closure will be completed sometime during the month of April Section 1 is the Introduction, Section 2 is the Facility Description and History, Section 3 is the Environmental Setting Section 4 is the Groundwater Monitoring and Contaminant Migration Section 5 is the Sampling and Analysis review and Section 6 contains the Conclusions and Recommendations Additional sections included in this report are Tables Figures Appendix A (Geologic Logs and Construction Details) and Appendix B (Comprehensive Groundwater Monitoring Evaluation Worksheet) 1 0 INTRODUCTION Hercules Aerospace Company (Hercules) operates the Bacchus Works located near Magna Utah which has both active and inactive solid and hazardous waste management units (SWMUs and HWMUs) Hercules began operations of the Bacchus Works in 1918 when it began manufacturing explosives in 1958 the Bacchus Works were renovated into a solid rocket propulsion manufacturing facility Hercules has submitted a Part B application to the Division of Solid and Hazardous Waste for continued operation of its HWMUs The Part B application is under review Because many of the past practices at the Bacchus Works resulted in the operation of land disposal facilities Hercules has been required to install and operate a groundwater monitoring system Hercules is currently operating under the provisions of R315 7 of the Utah Administrative Code (the Rules) In accordance with the requirements of the State EPA Agreement (SEA) and the RCRA Implementation Policy (RIP) the Division of Solid and Hazardous Waste (the Division) is required to conduct a Comprehensive Monitoring Evaluation (CME) of hazardous waste management facilities once every three years A CME was conducted at the Bacchus Works in 1990 however the report of that CME was not finalized In accordance with the SEA and RIP Hercules was due for another CME in FY 93 Region VIII EPA agreed to combine the FY 90 CME commitment and the FY 93 CME commitment Hercules entered into a Consent Order in 1988 which resolved administrative issues surrounding the operations at the Bacchus Works The main purpose of the 1988 Consent Order was to establish corrective action procedures for the Bacchus Works Hercules is currently addressing groundwater contamination which has migrated off site The groundwater contamination is the result of past hazardous waste management practices at the Bacchus Works Hercules has identified many of the source areas that contributed to the release of hazardous waste or hazardous constituents to the environment and has subjected many of them to interim measures Hercules is currently waiting for the Division approval of the RCRA Facility Investigation Work Plan before proceeding with corrective action at the facility Documents reviewed as part of the CME are Wastewater Characterization Report1 Ground Water Quality Assessment Report2 Hercules quarterly ground water monitoring reports Additional soil and waste analyses results Part B permit applications and subsequent revisions Aerial photographs Facility Inspection Reports Correspondence Personal communications Halgren D L D A Holtgraves S E Jew October 1988 (originally submitted in October 1987) Wastewater Characterization Report Hercules Aerospace Company Bacchus Works Magna Utah JEarlhFax Engineering 1988 Ground Water Quality Assessment of the Hercules Bacchus Works Magna Utah 1 2 0 FACILITY DESCRIPTION AND HISTORY Hercules Bacchus Works located near Magna Utah has active and inactive SWMUs and HWMUs A Part B permit application for the HWMUs which Hercules intents to continue operating was filed with the Utah Solid and Hazardous Waste Control Board and the U S Environmental Protection Agency (EPA) in September 1985 Modifications and revised applications have since been submitted The permit has not yet been issued The remaining SWMUs and HWMUs identified in the RFA are being addressed through an administrative order and the RCRA corrective action process Closure plans will be submitted for all inactive units after the corrective measures study has been completed The Hercules complex is comprised of six separate plants under the direction of the Bacchus Works Management These plants are designated as Plant 1 Plant 2 {Clearfield Utah ) Plant 3 Naval Industrial Reserve Ordinance Plant (NIROP) Bacchus West and Tekoi (Tooele County Utah) For the purposes of this CME the Bacchus Works shall be considered to only includes Plants 1 and 3 Bacchus West and NIROP The Clearfield complex (Plant 2) and Tekoi are considered separate hazardous waste management facilities and are not included in the scope of this report The scope of the CME is to evaluate the groundwater monitoring system in place for Plants 1 and 3 Bacchus West and NIROP which are contiguous operations The facility locations are shown in Figure 1 Plants 1 NIROP and Bacchus West perform operations related to the manufacturing of rocket motors preparation of high energy propellant ingredients mixing casting and curing propellant finishing motors and performing physical and chemical testing of raw materials to finished products Plant 3 produces resms graphite fiber and composite products Hercules has two sites in Clearfield referred to as Plant 2 which are motor winding facilities and the Tekoi site in Tooele County which is a test firing facility these facilities are not contiguous to the main Bacchus Works and therefore are not evaluated as part of this CME Plant 2 and Tekoi are considered generation site and all shipments hazardous waste to the Bacchus Works are considered disposal at an approved off site hazardous waste management facility The Bacchus Works are on property which are either Hercules owned or leased with one exception NIROP NIROP is owned by the U S Navy but Hercules is the operator The major portion of the land which makes up Bacchus West is leased from the Kennecott Corporation The Bacchus Works is located 4 miles south of the unincorporated town of Magna Utah and 18 miles southwest of Salt Lake City Utah in Salt Lake County Transportation access includes Utah State Highway 111 which goes through the plant a railroad spur to the plant and an international airport within 15 miles The Bacchus Works began operations in 1915 as a producer of commercial blasting powder Beginning in 1958 the plant was renovated into a modern self sufficient solid rocket propulsion facility with research development and production capability The following are detailed descriptions of the four plant sites 2 1 Plant 1 Plant 1 is comprised of laboratories production and testing facilities Laboratory facilities at the Bacchus Works consist of numerous buildings The laboratory activities involve propellant research process development materials development nondestructive and destructive testing standards measurement and applied physics research Production facilities comprise the largest area and have the greatest number of buildings on plant The activities conducted in the production facilities include empty rocket motor chamber preparation propellant ingredient preparation and handling propellant mixing case bonding motor casting motor 2 curing mold assembly/disassembly propellant machining storage final assembly and shipment In addition Plant 1 does some preprocessing of raw materials an example are the two biazzi nitrators which produce nitroglycerine (NG) and other nitrated esters These products are combined with other chemicals to manufacture some of Hercules propellants plant 1 has a small Static Firing and Test Range (Plant 1 Range) that is used to test fire propellant mixes evaluate nozzle actuation and pressure testing rocket casings prior to casting The Plant 1 Range occupies a 2 acre site in the south area of the plant and includes four firing bays It has bays that allow both horizontal and vertical firing of test charges used in research and development activities at the facility This area previously was used to test fire rocket prior to the construction of the Tekoi facility in Tooele County pit 38 is a small research area within the boundaries of Plant 1 This area is used for applied physics research and nondestructive and destructive testing One of Pit 38 s responsibilities are to establishing DOT shipping classifications by testing propellants to determine there degree of shock sensitivity Pit 38 has conducted some research in the destruction of reactive materials Hazardous waste residues are routinely generated at Pit 38 these residues are managed through the environmental office All reactive residues are managed at Hercules interim status open burn/open detonations grounds (OB/OD) Due to reductions in the aerospace industry Hercules has closed many of its process units in Plant 1 Currently the only units in operation are the biazzi nitrators and the x ray bunkers The other process buildings are being used for storage or laboratory type testing Hercules is not expecting to return these buildings to operational status any time soon plant 1 has two of Hercules four interim status storage facilities HS 1 and ES 1 HS 1 is a waste chemical storage area This area is used to manage hazardous and nonhazardous waste solids off specification commercial chemical products and waste oils Only a small portion of HS 1 has secondary containment because HS 1 is used primarily for non liquid waste streams ES 1 is an unused process building that has been refurbished for the storage of explosive hazardous waste HS 1 and ES 1 are both identified m the July 1991 Part B Permit Application which is being reviewed by the Division 2 2 NIROP NIROP located to the north of Plant 1 was originally built by the U S Air Force for production of Minuteman Stage III rocket motors When Minuteman motor production was completed these facilities were temporarily converted to the production of antipersonnel mines NIROP was appropriated by the U S Navy in conjunction with Naval programs being conducted at the Bacchus Works which includes the production of motors for the Polaris Trident and Trident II programs Major process steps conducted at NIROP are similar to those at Plant 1 and include empty chamber preparation propellant ingredient preparation and handling motor curing and storage final assembly inspection and shipment The OB/OD area is located within the bounds of the NIROP facility Hercules has a number of other regulated units within the boundaries of the NIROP facility but the OB/OD area is the only regulated unit in operation The other regulated sites located inside NIROP are sumps spills sites and buried waste site and are being addressed through the RCRA Facility Investigation (RFI) It is believed that the sumps and the buried waste sites are the major contaminant source area for solvent contaminants found in the groundwater underlying the Bacchus Works 2 3 Plant 3 Plant 3 is located in the southeast corner of the Bacchus Works it is contiguous to Plant i Plant 3 manufactures carbon fiber compound resins carbon fiber prepreg and complete carbon structures 3 Carbon fiber is a high performance inorganic fiber produced by the pyrolysis of polyacrylonitnle (PAN) fiber It is used extensively as a reinforcing agent in synthetic resin matrices such as epoxies polyimides vinyl esters phenolics and certain thermoplastics Carbon fiber is used in the structural members and control surfaces of the newest generation of both commercial and military aircraft in fuel efficient automobiles in sporting goods and in other applications where low weight and extreme strength are required Hercules manufactures carbon fiber for its own use Carbon fiber manufactured at the Bacchus Works is used at Plant 3 facilities (carbon fiber prepreg or carbon structures) or sent to the Clearfield Utah motor winding facilities Hercules has recently started selling scrap or chopped carbon fiber to buyers who are interested in lower grade carbon fiber Hercules may become a supplier ot graphite fiber products such as graphite filaments (yarn) resin impregnated tape woven cloth and chopped graphite fiber However due to the cost of Hercules current manufacturing process it is believed that this market will not occur until after Hercules has modified Plant 3 s process so that it produces carbon fiber without the methylene chloride sizing Plant 3 manufacturers two major classes of products The first product is carbon fiber manufactured from PAN precursor Part of this process uses methylene chloride as a sizing agent The reauthorization of the Clean Air Act established deadline for reducing or discontinuing the use of certain chemicals in common manufacturing processes Methylene Chloride is one of the chemicals being restricted In the second area carbon fiber products from the first area are impregnated with resin to form the prepreg products Basic operations at Plant 3 are fiber sizing solvated resin coating prepreg manufacturing resin filming resin manufacture and carbon fiber manufacture Plant 3 also does resin blending resins and manufacturing of composite structures In addition Plant 3 is also the site of HS 3 an interim status hazardous waste storage pad for liquid hazardous waste This is an interim status unit that is included in the Part B Permit Application for the Hercules Hazardous Waste Management Facilities Hercules made the decision to locate the liquid hazardous waste storage pad at Plant 3 because Plant 3 generated the largest percentage of liquid hazardous waste at the Bacchus Works 2 4 Bacchus West The Bacchus West facility comprises 15 major buildings which are used in the manufacturing of large solid propellant rocket motors The major process steps at Bacchus West are empty chamber preparation propellant ingredient preparation and handling propellant mixing propellant casting and curing final assembly and inspection Automation robotics and remote controls are used where practical especially in ingredient preparation and propellant mixing Closed ingredient handling systems are used in all possible applications to prevent contamination of the processes products and environment Bacchus West and Plant 1 are separated by Highway 111 Hercules constructed an overpass between the two plants to make them contiguous Hazardous waste generated at the Bacchus West plant must be transported to either Plant 1 or NIROP s storage treatment or disposal facilities for processing All wastes generated at the Bacchus West facility are managed by Hercules environmental office Bacchus West has no units that required it to have a groundwater monitoring system 3 0 ENVIRONMENTAL SETTING 3 1 Land Use The Bacchus Works consists of four plants (Plant 1 Plant 3 NIROP and Bacchus West) located in Magna Utah on approximately six square miles along the western boundary of Salt Lake County A brief 4 discussion of the operations conducted at these facilities is provided in the previous sections Zoning to the north and east of the facility is mostly agricultural and low density residential To the northwest and west land use is agricultural low to medium density residential and industrial (mining operations) with some small commercial areas To the south and southeast land use is mixed including agricultural low to medium density residential sand and gravel excavation and commercial usage with some industrial zones 3 2 Climate The climate in the vicinity of the Bacchus Works is semi-arid with moderately cold to cold winters and hot summers The nearby mountain ranges and the Great Salt Lake to the north exert a modifying influence upon the local climate Regional precipitation is generally greater in winter than in summer and greater near the mountain peaks of the Wasatch and Oquirrh Ranges than in the intervening Salt Lake (Jordan River) Valley in which Bacchus Works is located However in the valley spring precipitation generally exceeds that of the winter months Due to its high salinity the Great Salt Lake does not freeze and thus moderates valley temperatures The average annual temperature in the Bacchus Works area is in the low 50 s with generally hot dry summers Relative humidity averages between 20 and 30 percent during summer afternoons Nights are usually cool but daytime maximums occasionally exceed 100° F On clear nights cold air usually drains from the slopes of the adjacent ranges and accumulates on the valley floor while the foothills and bench areas such as at Bacchus Works remain relatively warm The average daily temperatures range from about 20° F to 40° F in January and from about 65° F to 94° F in July The average precipitation at the Hercules facility is about 15 inches per year According to interpreted weather data for Salt Lake County3 for May through October 24 hour rainfall for Bacchus Works ranges from between 1 and 2 inches The winds for the valley tend to prevail from the south to southeast averaging about 10 mph on an annual basis 3 3 Topography and Drainage The topography of the site rises gently from an elevation of about 4500 feet above mean sea level in the northeast corner of the site to approximately 5050 feet along the south central border of the site The sites geomorphrjiogy is characteristic of three depositional environments alluvial fans colluvial deposition and lacustrine environments The topographic surface of the Bacchus Works is generally covered by a thin veneer of alluvial lacustme or colluvial soils which have been reworked by one or more depositional environments or processes The major drainage channel for the Bacchus Works is Coon Creek an intermittent stream whose channel has cut through older alluvial colluvial and lacustrine deposits and Tertiary age volcanic origin along its course The site rests upon the northern distal end of a large topographic feature which is comprised of structurally raised blocks of Salt Lake Group volcanic material (Tertiary age lake and stream 'Hely A G R W Mower and C A Harr 1971 Water Resources ol Sail Lake County Utah Technical Publication 31 Utah Department ot Natural Resources Salt Lake City Utah deposits* which has been partially covered by additional alluvial and lacustrine deposits) Much of the site was reworked during the late Pleistocene5 by wave action from Lake Bonneville which eroded many of the pre existing surface features at the site or burying them beneath a layer of lacustrine sediments As a result of reworking by Lake Bonneville continued slope wash and other erosional processes the site is currently characterized by gentle topography that slopes away from the mountain front toward the center of the valley Large quantities of sand and gravel were deposited in localized areas by a combination of lake and stream processes Many of these deposits have been actively excavated for use as structural fill As a result large exposures of the once buried stratigraphic units have been created especially m the northwestern portion of the site Mapping of these exposures has yielded information on the depositional environment physical characteristics of the materials and geologic structures of the area 3 4 Geology The Hercules facility is located in the Jordan River valley of Salt Lake County The Jordan River valley is an easternmost structural valley of the Basin and Range physiographic province which includes parts of Utah Idaho Nevada Arizona and New Mexico The Basin and Range province consists of a series of north south trending normal faults which have resulted in strings of north south trending mountain ranges and valleys The Jordan River valley is bounded on the east and west by the Wasatch and the Oquirrh Mountain ranges respectively The Bacchus Works are situated at the toe of the Oquirrh Mountains on the alluvial fan formed at the mouth of Coon Canyon The Wasatch Mountains were formed by the Wasatch fault Movement along this fault has displaced the mountains upward relative to the adjacent valley Likewise the Oquirrh Mountains immediately west of Bacchus Works are bounded on their eastern margin by one or more faults which are partly buried by more recent deposits In addition there is another fault (the South Jordan fault) that divides the Jordan River valley This fault has been exposed at areas throughout the valley and appears to trend north south parallel to the Wasatch and Oquirrh faults It is believed that the South Jordan fault splits off of the Wasatch fault near the warm springs area of North Salt Lake and continues south to the Jordan Narrows The fault scarp for the South Jordan fault is not visible at the surface but excavations have determined that it has been active in Holocene times Bedrock composed of late Paleozoic quartzites shales and limestones is exposed at or near the ground surface west of the fault Bedrock is displaced downward east of the surface trace of the fault beneath Bacchus Works and covered by at least 2600 feet of volcanic and lacustrine sediments The bedrock is highly fractured and folded A summary of the regions geologic history is provided in the following paragraphs During the Pennsylvanian and Permian Periods marine sediments consisting of sand clay and calcareous detritus were deposited in shallow marine environments In the late Cretaceous Period compressional forces from the west resulted in folding and thrust faulting in conjunction with uplift of the region into mountain ranges Extensive jointing and fracturing of the bedrock were caused by this folding and faulting episode Tensional stresses in the early to middle Tertiary Period resulted in north south trending normal faults that formed a series of high linear mountain ranges with intervening basins which received sediment from adjacent highlands This activity was associated with volcamsm and ancient lake *Slentz L W 1955 Salt Lake Group in Lower Jordan Valley Utah Guidebook lo the Geology ol Utah No 10 Utah Geological Society Salt Lake City Utah ''McCoy W D 1987 Quaternary Amino Stratigraphy ot the Bonneville Basin Western U S GSA Bulletin Vol 98 No 1 pp 99 112 6 deposition6 In the late Tertiary Period a series of geologic units now referred to as the Salt Lake Group were formed from deposition of sediments in large lakes which developed within the valleys These lake deposits are composed primarily of silts and clays with minor amounts of sand and gravel and are characterized by very low permeabilities extensive deposits of tuft are also present in the Salt Lake Group Early in the Pleistocene Epoch the Harkers Alluvium which consist of poorly cemented gravels cobbles and boulders formed on the flank of the Oquirrh Mountains over the Salt Lake Group The alluvial fan deposits were overlapped by more recent lake sediments of Pleistocene Lake Bonneville the predecessor to the present Great Salt Lake Lake Bonneville covered much of western Utah and parts of Idaho and Nevada between about 23 000 and 12 000 years ago Deposits associated with the lake consist of lake bed and alluvial materials reworked by lake bottom and shoreline processes Lake Bonneville sediments thicken eastward The most recent sedimentary deposits consist of stream alluvium and mud and debris flows within the drainage areas of Coon Canyon and Harkers Canyon These canyons were cut into Lake Bonneville and older sedimentary deposits The stream alluvium consist primarily of silty and clayey sand and gravel The mud and debris flow deposits are characterized by a broad gradation of sediments from clay size fines to boulders as large as 5 feet in diameter Boulders scattered about the vicinity of Coon Canyon were probably transported from the Oquirrh Range to their present locations by mud and debris flows 3 5 Site Stratigraphy The stratigraphic units present at the site can be subdivided into two distinct groups {see Figure 1 for an idealized stratigraphic section) The uppermost group of stratigraphic units consists of unconsolidated to moderately consolidated deposits of Tertiary and Quaternary age These deposits include moderately to poorly consolidated Tertiary age volcanic materials {identified as the Jordan Narrows unit and the Camp Williams unit of the Salt Lake Group) Also included in this group are unconsolidated Quaternary alluvial and lacustrine deposits (identified as Harkers Alluvium Bonneville lake sediments and Holocene alluvium) Underlying the deposits of the Salt Lake Group are Tertiary volcanic rocks and Paleozoic limestones and quartzites These older rocks are exposed in the Oquirrh Mountains west of the site but are at sufficient depth that they were not encountered at the surface or drilling at the site A period of extensive volcanism occurred in the region of the site during the middle Tertiary Period This activity buried much of the area under a cover of volcanic ash reaching a thickness of hundreds of feet Subsequently the ash was eroded from higher areas and deposited within and along the margins ol the Salt Lake Valley ' These volcanic deposits belong to the Salt Lake Group which is comprised predominantly of a white to gray shardy volcanic ash with lesser amounts of chalky calcareous siltstones and claystones (Jordan Narrows unit) overlain by red to brown mudstones sandstones and gravel/sand conglomerates (Camp Williams unit) Within the site area outcrops of the Jordan Narrows unit of the Salt Lake Group are common along and contiguous to the southern portion of Coon Creek Minor exposures of the Camp Williams unit are present at the site near the south central part of Plant 1 "Montgomery SB 1981 Hydroqeologic Study ot Hercules Incorporated Area tor Hercules Incorporated Magna Utah 7Slentz L W 1955 Salt Lake Group in Lower Jordan Valley Utah Guidebook to the Geology ot Utah No 10 Utah Geological Society Salt Lake City Utah 7 The early Quaternary alluvial materials at the site are composed of poorly sorted gravel and cobbles as well as occasional large boulders in a silty sand matrix This deposit displays cross bedding silt lenses and buried stream channels It was derived from materials which originated in the upper portion of Harkers and Coon Canyons and has been termed Harkers Alluvium 8 Significant amounts of lacustrine sediments were deposited in the Salt Lake Valley during all Pleistocene lake cycles9 These deposits consist of thick sequences of clay and silt in the center of the valley grading into veneers of sand and gravel intercalated with clay and silt layers along the valley margins However because of the higher elevation of the site m relation to the Salt Lake Valley only deposits from the more recent Lake Bonneville cycle were encountered at the site 3 6 Hydrogeology The following discussion of the hydrogeology beneath the Hercules facility is based on information from Hercules Ground Water Quality Assessment Report (GWQAR)10 the Facility Information Report" and the installation of from recent groundwater monitoring wells The GWQAR draws conclusions regarding the quality and movement of groundwater beneath the site and the occurrence of facility contaminants Those findings were summarized in this RFA Report Those same finding are presented in this report along with an evaluation of the conclusions of the GWQAR Based on the work of Hely et al12 groundwater in the Salt Lake {Jordan River) Valley near the Bacchus Works occurs in (1) a confined aquifer that extends from near the eastern edge of the Bacchus Works and dips toward the valley center (2) a deep unconfmed aquifer located between the confined aquifer and the eastern edge of the Oquirrh Mountains {3) in a shallow unconfmed aquifer that overlies the confined aquifer and (4) is discontinuous perched aquifers According to Hely et al13 the confined aquifer occurs predominantly within unconsolidated Quaternary deposits of hydrauhcally interconnected clay silt sand and gravel with individual beds ranging in thickness up to several tens of feet The aquifer attains a maximum thickness of approximately 1000 feet Underlying this aquifer are relatively impermeable consolidated and semi consolidated Tertiary and pre Tertiary deposits Overlying the confined aquifer are relatively impermeable Quaternary deposits of clay silt and fine sand acting as a single confining bed that ranges in thickness from about 40 to 100 feet The confined aquifer serves as a primary source of drinking and industrial groundwater in the valley Regional data suggest that the western boundary of the confined aquifer extends into the northeast corner of the site However according to Hercules data collected for the GWQAR does not support this dTooker E W and R J Roberts 1971 Geologic Map of the Magna Quadrangle Salt Lake County Utah Geologic Quadrangle Map GQ 923 U S Geologic Survey "McCoy W D 1987 Quaternary Amino Stratigraphy ot the Bonneville Basin Western U S GSA Bulletin Vol 98 No 1 pp 99 112 l0EarthFax Engineering 1988 Ground Water Quality Assessment of the Hercules Bacchus Works Magna Utah 11 IT Corporation September 14 1988 Facility Information Report Hercules Aerospace Company Missiles Ordnance and Space Group Bacchus Works Knoxville Tennessee 1 Hely A G R W Mower and C A Hair 1971 Water Resources of Salt Lake County Utah Technical Publication 31 Utah Department of Natural Resources Salt Lake City Utah "Ibid 8 conclusion The deep unconfmed aquifer consists of materials similar to but generally coarser than the confined aquifer This deep unconfmed aquifer is actually an extension of the confined aquifer near the valley margins where the confining bed is absent M Thus much of the water that reaches the confined aquifer must first pass through the deep unconfmed aquifer except along the valley margins which are major recharge zones for the confined aquifer Near the mountain fronts the term deep may be misleading as the Quaternary deposits thin out and the underlying Tertiary deposits occur at higher elevations The uppermost aquifer underlying the site is considered part of the deep confined aquifer15 The extensive faulting along the valley margins act as conduit for groundwater recharge of the confined aquifer and in the case of the Bacchus Works the deep unconfmed aquifer is hydrauhcally connected to the deep confined aquifer This interpretation is consistent with a recent report that places the Bacchus Works in a primary recharge area for the Salt Lake Valley 16 A shallow unconfmed aquifer is present throughout the Salt Lake Valley it is present in areas where a confining bed separates the two aquifers17 The shallow aquifer generally consists of clay silt and fine sand and attains a maximum thickness of about 50 feet In many areas of the valley the shallow unconfmed aquifer has a permeability only slightly higher than that of the confining bed that underlies the shallow aquifer and overlies the confined aquifer The shallow unconfmed aquifer receives recharge directly from surface infiltration and near the center of the valley from upward flow from the confined aquifer in those portions of the valley where the potentiometnc surface of the confined aquifer is above the confining layer Site investigations have shown that the regional or deep confined aquifer and that the shallow unconfmed aquifer of Hely et al18 are not present under the Bacchus Works 19 Perched aquifers occur in areas of the valley where the bottom of the confining bed lies above the deep water table Regional data indicate that extensive perched aquifers do not exist near the site Regional data indicate that the direction of groundwater flow in the vicinity of the site is to the north Hib.d '^EarthFax Engineering 1988 Ground Water Quality Assessment ot the Hercules Bacchus Works Magna Utah '^Anderson PB DD Susong SR Wold V W Heilweil and R L Baskin Hydrogeology ot Recharge Areas and Water Quality oflhe Principal Aquifers along the Wasatch Front and Adjacent Areas Utah U S Geological Survey Water Resource Investigation Report 93 4221 1994 l7Hely A G R W Mower and C A Harr 1971 Water Resources of Salt Lake County Utah Technical Publication 31 Utah Department of Natural Resources Salt Lake City Utah |0EarthFax Engrneenng 1988 Ground Water Quality Assessment of the Hercules Bacchus Works Magna Utah 9 i northeast and generally follows the surface topography 20 21 71 Groundwater flowing beneath the site is therefore expected to eventually flow beneath Magna and discharge into the Great Salt Lake Deposits that comprise the confined portion of the aquifer are of Tertiary and Quaternary age Near the western edge of the valley (near Bacchus Works) the Quaternary deposits are relatively thin and groundwater is also present in sediments of Tertiary age (Salt Lake Group) To the east the Tertiary sediments are extensively faulted and the thickness of Quaternary deposits increases Faulting and the complex depositional history during the various stages of Lake Bonneville23 have caused all unconsolidated water bearing sediments to be hydrauhcally interconnected to some degree Hercules considers the uppermost aquifer as the first zone of saturation encountered during drilling of a monitoring well All monitoring and observation wells drilled on the site were installed to monitor this uppermost aquifer Deep piezometers were drilled to monitor zones beneath the uppermost aquifer The uppermost aquifer was encountered by monitoring wells within Bonneville sediments Harkers Alluvium the Camp Williams unit and the Jordan Narrows unit24 The saturated Bonneville sediments consist predominantly of sandy and silty gravel At GW 1 (the only well that encountered saturated Bonneville sediments) groundwater exists under unconfmed conditions Where the Bonneville sediments are part of the uppermost aquifer they are underlain by units of the Salt Lake Group The uppermost aquifer occurs in Harkers Alluvium along Coon Creek and within the central portion of the site This central area extends from the eastern edge of the Salt Lake Group ndge east of Coon Creek Saturated Harkers Alluvium generally consists of silty to gravelly sand with groundwater occurring under both unconfmed and locally confined conditions25 Harkers Alluvium is underlain by Salt Lake Group deposits beneath the site The uppermost aquifer occurs within the Camp Williams unit is generally in the area east of a suspected graben Where saturated this unit consists of poorly indurated siltstones and silty sandstones that are hydraulically unconfmed to semi confined The Camp Williams unit is considered part of the uppermost aquifer only near its upper portion where it is less indurated and thus slightly more permeable than at depth It is underlain by the Jordan Narrows unit The Jordan Narrows unit contains the uppermost aquifer in areas where the top of this unit exists at a higher elevation than the water table This occurs generally in the areas immediately east and west of Coon Creek where structural highs of the Jordan Narrows exist Where the Jordan Narrows is considered °Hely A G R W Mower and C A Harr 1971 Water Resources ol Salt Lake County Utah Technical Publication 31 Utih Department of Natural Resources Salt Lake City Utah 'Seller R L and K M Waddell 1984 Reconnaissance ot the Shallow Unconfmed Aquifer in Salt Lake Valley Utah U S Geological Survey Water Resources Investigations Report 83 4272 Salt Lake City Utah Anderson P B D D Susong S R Wold V M Heilweil and R L Baskin Hydrogeology ot Recharge Areas and Water Quality of the Principal Aquifer along the Wasatch Front and Adjacent Areas Utah US Geological Survey Water Resource Investigation Report 93 4221 1994 'Currey D R G Atwood and D R Mabey 1984 Major Levels of Great Salt Lake and Lake Bonneville Map 73 Utah Geological and Mineral Survey Salt Lake City Utah ^EarthFax Engineering 1988 Ground Water Quality Assessment ot the Hercules Bacchus Works Magna Utah *lbid 10 part of the uppermost aquifer it generally consists of poorly indurated ash and is unconfmed to semi confined Although not fully penetrated by drilling at the site the Jordan Narrows may reach a maximum thickness of 2000 feet26 Local exceptions to the above spatial generalities occur across the site where structural lows of one unit have been infilled by other deposits (e g where a buried channel within the Salt Lake Group has been infilled with Harkers Alluvium) This situation may also result in portions of Bonneville sediments being locally saturated Hely et al27 indicate that the confined aquifer of the Salt Lake Valley extends into the northeast corner of the site However Hercules GWQAR indicates that no lithologic or hydrologic conditions were encountered beneath the site that correlate to Hely s description of either the regional confined aquifer the overlying shallow unconfmed aquifer or the intervening confining bed28 Thus based on data collected by Hercules investigation the western extent of the regional confined aquifer is considered to end east of the site The uppermost aquifer beneath the site is considered part of Hely s deep unconfmed aquifer Salt Lake Group deposits underlie the uppermost aquifer beneath the entire site Data obtained from the deep piezometers indicate that groundwater occurs not only in the uppermost aquifer but also within the deeper less permeable deposits of the Salt Lake Group According to Hercules the Salt Lake Group materials serve as the lower boundary of the uppermost aquifer becoming less permeable with depth Nonetheless the Salt Lake Group is apparently saturated throughout the depth penetrated by the deep piezometers However the hydraulic characteristics of this group indicate that it is an aquitard rather than an aquifer below the upper several feet ot its thickness29 Water levels measured m the monitoring wells installed at the site indicate that groundwater in the uppermost aquifer beneath the site flows generally to the north30 However this general trend of northerly groundwater flow direction is modified locally According to Hercules a groundwater divide exists immediately east oi Coon Creek due to the presence of Salt Lake Group sediments at a shallow depth 31 Groundwater in this mounded area is at least 40 to 60 feet higher than to the immediate east or west The mound isolates groundwater in the uppermost aquifer in the Coon Creek area from the east of the ridge Groundwater flows from the mounded area toward Coon Creek to the west where the Salt Lake Group is present at a much greater depth (greater than 150 feet below ground surface) Estimates of average linear (horizontal) groundwater velocities range from 0 1 to over 100 ft/day and are predominantly controlled by the lithology (i e horizontal hydraulic conductivity) of the uppermost aquifer rather than by local variations in the hydraulic gradient "Slentz L W 1955 Salt Lake Gioup in Lower Jordan Valley Utah Guidebook to the Geology ot Utah No 10 Utah Geological Society Salt Lake Ciry Utah 7Hely A G R W Mower and C A Harr 1971 Water Resources ot Salt Lake County Utah Technical Publication 31 Utah Department ol Natural Resources Salt Lake City Utah BEarthFax Engineering 1988 Ground Water Quality Assessment ot the Hercules Bacchus Works Magna Utah "ibid ,0lbid 11 Ibid 11 Based on hydrographs from selected wells the greatest amount of recharge to the site occurs as infiltration of stream flow and horizontal underflow along Coon Creek Channel seepage along Coon Creek resulted in water level rises in excess of 30 feet during the spring of 1986 Water level fluctuations are much less in other parts of the site However significant amounts of recharge occur due to horizontal recharge (underflow) from the south along structural depressions in the Salt Lake Group According to Hercules groundwater discharge from the site is estimated to be approximately 2 800 acre feet per year The majority of discharge is coincident with thick saturated sections of coarse grained Quaternary-age deposits (i e along the Coon Creek drainage and along the north central boundary of the site) Based on groundwater levels obtained from off site well completions groundwater flows north northeast from the site toward Hunter Utah (east of Magna Utah) and eventually reaches the Great Salt Lake 4 0 GROUNDWATER MONITORING AND CONTAMINANT MIGRATION For purposes of groundwater monitoring the regulated facilities at the Bacchus Works were divided into Waste Management Areas (WMAs) This determination was made because it was not appropriate to impose the one up three down requirement for each waste management unit primarily due to the large number of waste management units which are in close proximity to one another A WMA is defined as a group of contiguous waste management units which managed similar wastes Hercules initially proposed dividing the Bacchus Works into five WMAs33 Two additional WMAs were defined sometime between 1985 and 1991 they were defined as WMAB and WMAN Each WMA had at least one set of upgradient and downgradient wells The WMA approach was abandoned in late 1991 because it became apparent that the waste management unit could be incorporated within three groundwater flow paths or areas 33 Grouping the monitoring wells by flow paths enabled Hercules to define three distinct flow paths or areas West Bacchus Flow Area (WBFA) East Bacchus Flow Area (EBFA) and Central Bacchus Flow Area (CBFA) Each flow area can be viewed as having its own upgradient and downgradient monitoring wells However a more holistic approach to addressing the Bacchus Works is to evaluate the entire monitoring system and establish whether the SWMUs are adequately covered Since most of the SWMUs identified in the RFA have either been taken out of service upgraded or remediated the function of the groundwater monitoring system is to monitor the migration of the contaminant plume and identify additional source areas that were not previously identified The sections that follow will address the groundwater monitoring system Hercules assessment of hydrologic parameters the adequacy of the sampling and analysis program the status of the contaminant plume and interim measures which have impacted the contaminant plume 4 1 Groundwater Monitoring Wells Hercules began installing groundwater monitoring wells in late 1985 After the initial 42 wells were installed in 1985 Hercules went into assessment monitoring and completed a Hydrogeologic ' Part B Permit Application for Hazardous Waste Management Facilities Hercules Incorporated Bacchus Works Magna Utah September 1985 "Groundwater Monitoring Report tor First Quarter 1992 Hercules Incorporated Bacchus Works Magna Utah 12 Characterization Report in 198634 and a Groundwater Quality Assessment Report in 1988 w By 1988 Hercules had installed 61 monitoring wells 6 deep piezometers and 4 observation wells since that time Hercules has continued to be proactive in its investigations of groundwater flow through the Bacchus Works 4 1 1 Design and Construction of Groundwater Monitoring Wells Monitoring wells installed during the early stages of Hercules groundwater monitoring program used a non-inert material {galvanized steel) above the saturated zone with an inert material {stainless steel) in the saturated zone The use of galvanized steel as a casing material was abandoned because condensation inside the well was leaching metals from the galvanized steel In addition to the leaching it appeared that rising and lowering the purge pump and sampling equipment may have scraped off scales of the galvanizing Hercules experienced a rise in the concentration of lead and zinc They also observed that the total metal analysis was significantly higher than the dissolved portion suggesting that the metals present in the groundwater sample were not soluble under normal conditions This phenomenon resulted in some anonymous metal results which have diminished over time Hercules has discontinued this construction practice and is not using PVC well casing above the saturated zone Generalized information regarding individual groundwater monitoring can be obtained by reviewing Table 4 11 for more detailed information refer to the Geologic Log and Well Construction Details in Appendix A 4 1 2 West Bacchus Flow Area (WBFA) The WBFA is defined along the eastern edge of Harkers and Coon Canyons In the WBFA Hercules has established that the uppermost aquifer occurs in Harkers Alluvium along Coon Creek and is bounded along its eastern edge by a ridge of the Salt Lake Group It should be noted that the WBFA has the highest concentration of SWMU at the Bacchus Works The monitoring wells which comprise the WBFA are GW 01 GW 02 GW 03 GW 04 GW 05 GW 06 GW 07 GW 08 GW 09 GW 10 GW 11 GW 12 GW 13 GW 14 GW 37 GW 38 GW 39 GW 40 GW 41 GW 42 GW 43 GW 45 GW-46 and GW 52 4 12 1 WBFA Groundwater Flow Characteristics In the Groundwater Quality Assessment Report36 (GWQAR) Hercules discusses the existence of a groundwater mound along the eastern edge of Coon Creek The potentiometnc surface has been shown to generally contour the upper surface of the Salt Lake Group The groundwater mound which defines the eastern edge of WBFA exist along a structural high of the Salt Lake Group Supporting the conclusion that the uppermost aquifer generally reflects the contour of the top of the Salt Lake Group It appears that most of the groundwater flow from Bacchus West would also drain through the WBFA Groundwater flow through the WBFA follows the stream channel cut by Coon and Harkers Creeks and trends to the north northeast GW 52 is an exception to the general trend of the potentiometnc surface which is used to roughly define the north east corner of the WBFA At this monitoring well the static water level is approximately 80 feet lower than wells to the east and 220 feet lower than wells to the west This difference occurs even H EarthFax Engineering Hydrogeologic Characterization ot the Bacchus Works ot Hercules Incorporated Magna Utah July 1986 ^EarthFax Engineering Groundwater Quality Assessment of the Hercules Bacchus Works Magna Utah November 1988 '"Ibid 13 though GW 52 was drilled along the crest of the ridge of the Salt Lake Group37 The anomalous nature of this information suggests that the uppermost aquifer is either missing or it was bypassed during the drilling and the GW 52 is not monitoring the uppermost aquifer This conclusion is supported by the fact that monitoring wells to the south which were drilled either along or close to the ridge of the Salt Lake Group encountered the uppermost aquifer at a typically shallow depth The other conclusion which could be drawn is that the mounding present in the southern portion of the Bacchus Works is absent at the northern boundary The potentiometnc surface map generated from data collected during the first quarter of 1993 supports this conclusion and suggest that the groundwater mound present at the south boundary becomes a no flow or low flow boundary as groundwater move north The WBFA has two deep piezometers DP 1 and DP 5 DP 1 is located in the Coon Creek drainage approximately in the middle of WBFA and DP 5 is located at the northern edge of the WBFA Hydrostatic measurement taken from DP 1 indicate that the vertical flow is towards the intermediate zone from both above and below The vertical flow at DP 5 is downward There are a number of springs in the area between DP 1 and DP 5 The surficial geology of this area shows that a large portion of the surface sediments have been removed exposing the intermediate flow zone which is identified in DP 1 s well log In the case of DP 5 the vertical gradient is consistent with lithology log for GW 37 and GW 38 Pump tests have been conducted in the central portion of the WBFA at GW 7 and GW 9 Hercules placed an observation well next to GW 7 and GW 9 OW 1 and OW 2 respectively The hydraulic conductivities for the pump tests at GW 7 and GW 9 were reported to be 306 (ft/day) and 494 (ft/day) respectively Hydraulic conductivities for the slug test of GW 7 and GW 9 were calculated to be 142 (ft/day) and 34 2 (ft/day) respectively While the hydraulic conductivities from the two tests differ significantly they are considered to be in reasonable agreement From the above discussions it appears that the groundwater in the WBFA occurs under unconfmed and locally confined conditions In the southern portion of the WBFA groundwater appears to flows through coarse grained alluvial sediments This flow channel appears to be a conduit as the vertical component of groundwater flow is both up and down At the northern end of the WBFA the surface sand and gravel sediments have been stripped and groundwater appears to be flowing through finer grained sediments and be under locally confined conditions In general groundwater flow in the WBFA is along the historic stream channels of Coon Creek and Harkers Creek 4 1 3 Central Bacchus Flow Area {CBFA) The western boundary of the CBFA is the eastern edge of Harkers and Coon Canyons The eastern boundary can not be identified by any topographic feature but is characterized by change in the groundwater s direction of flow The eastern edge of the CBFA is outlined by monitoring wells GW 17 GW 24 GW 47 GW 71 and GW 57 The monitoring wells which comprise the WBFA are GW 15 GW 16 GW 17 GW 18 GW 19 GW 20 GW 21 GW 22 GW 23 GW 24 GW 25 GW 26 GW 27 GW 28 GW 29 GW 30 GW 31 GW 32 GW 33 GW 34 GW 35 GW 36 GW 44 GW 47 GW 48 GW 49 GW 50 GW 51 GW 53 GW 54 GW 55 GW 56 GW 57 GW 66 GW 67 GW 68 GW 69 GW 70 GW 71 GW 72 and GW 76 4 13 1 CBFA Groundwater Flow Characteristics The uppermost aquifer in the CBFA is bounded at its base by the either the Camp Williams unit (Tew) or the Jordan Narrows unit (Tjn) of the Salt Lake Group Many of the monitoring wells inside the CBFA have not been completed into the Salt Lake Group but have encountered groundwater in the 17 Ibid 14 Harkers Alluvium (Qh) which is directly above the Slat Lake Group Quite often monitoring well have been installed and developed at the interlace between the Harkers Alluvium and the Salt Lake Group Tew and Tjn respectively For the purposes of this report the values established for hydraulic conductivity porosity hydraulic gradient and horizontal groundwater velocity averaged The averaged values are hydraulic conductivity estimated at 12 6 ft/day assumed porosity 0 267 hydraulic gradient 0 062 ft/ft and horizontal groundwater velocity 3 72 ft/day All of these values were established by using the slug test data the lithology and grain size information and the static water level measurements The CBFA has three nested piezometers that Hercules refers to as deep piezometers The piezometers are identified as DP 2 DP 3 and DP 4 DP 2 is located to the south of a terrain feature which separates the southern and northern portions of the Bacchus Works DP 3 is located along the northern boundary on the NIROP facility DP 4 is located at the southern end of the CBFA The static water level information from 1988 established that groundwater movement is downward in piezometers DP 2 and DP 4 and that groundwater flows towards the intermediate layer in DP 3 The flow regime identified in DP 3 is consistent with flow patterns identified in other areas of the Bacchus Works The general pattern is that groundwater appears to be unconfmed above the Salt Lake Group contact and confined below the contact with the Salt Lake Group 4 1 4 East Bacchus Flow Area (EBFA) The EBFA defines an area that is downgradient of the Plant 3 facility There are seven monitoring wells and one deep piezometer within the EBFA The southern end of the EBFA is characterized by a groundwater mound that may be the result of infiltration from Bacchus Lake The monitoring wells that make up the EBFA are GW 58 GW 59 GW 60 GW 61 GW 73 GW 74 and GW 75 In addition to these monitoring wells the EBFA includes DP 6 4 14 1 EBFA Groundwater Flow Characteristics It is difficult to characterize where the uppermost aquifer in the EBFA is in relation to the Camp Williams unit (Tew) and Harkers Alluvium (Qh) It is possible to say that the uppermost aquifer is unconfmed and that it has a downward flow component This determination is made by reviewing the information obtained from DP 6 which indicates that groundwater flows to the intermediate layer38 and that this intermediate layer is in the Camp Williams unit The monitoring wells in the EBFA are screened in the Harkers Alluvium or at the interface with the Camp Williams unit of the Salt Lake Group For the purposes of this report the values established for hydraulic conductivity porosity hydraulic gradient and horizontal groundwater velocity are averaged The averaged values are hydraulic conductivity estimated at 5 9 ft/day assumed porosity 0 288 hydraulic gradient 0 060 ft/ft and horizontal groundwater velocity 1 06 ft/day All of these values were established by using the slug test data the lithology and gram size information and the static water level measurements It should be noted that these averaged values are for monitoring well GW 58 GW 59 GW 60 and GW 61 only Data was not available for monitoring wells GW 73 GW 74 and GW 75 4 2 Contaminants and Contaminant Source Areas This section will provide some details on the status of the aforementioned organic hazardous '"ibid 15 constituents that are currently being detected in the groundwater associated with the Bacchus Works The observations and evaluations are based on information from the third quarter sampling event of 1993 Given the dynamic nature of groundwater flow and contaminant transport it is likely that analytical data collected after the third quarter of 1993 will differ from pre 1993 data but this in no way would invalidate the earlier data Hercules has identified a total of 12 volatile organic constituents in the monitoring wells located on and adjacent to the Bacchus Works see Table 4 2 1 for list of the constituents Of the 12 volatile organic constituents that have been detected only 6 are currently being detected they are chloroform 1 1 dichloroethene trans 1 2-dichloroethene 1 1 1 trichloroethane tnchloroethene and 1 1 2 trichlorotnfluoroethane (Freon 113) A more detailed discussion of these constituents follows Chloroform Chloroform is being detected consistently in monitoring well GW 21 only The concentration has ranged from 5 ppb to 10 ppb A possible source for this contaminant is S 1 which will be addressed further in the RCRA Facility Investigation The potentiometnc surface around S 1 shows the presence of a groundwater mound that would be a driving force in the transportation ot this contaminant It appears that chloroform is not a major contaminant and that if additional contamination exist downgradient of GW 21 it would be detected at GW 49 or GW 50 sometime in the future Chloroform is a dense non aqueous phase liquid (DNAPL) a known carcinogen a biodegradation product of carbon tetrachloride and is slightly soluble in water Chloroform will degrade to methylene chloride in a reducing environment At the concentrations present in GW 21 it appears that chloroform would represent some risk 1.1 Dichloroethene 1 1 Dichloroethene (DCE) is has been identified in two area at the Bacchus Works and it appears that the plumes can be segregated into a WBFA plume and a CBFA plume The WBFA plume appears to be associated with buried waste (BW) sites in Coon Creek BW 2 BW 3 and BW 11 respectively The CBFA plume appears to be associated with BW 1 Hercules has conducted interim corrective measures at all of these buried waste sites and both plumes appear to be following the flow of there respective flow area An analysis of the isopack map of the CBFA plume suggest that a third DCE source may exist on the NIROP facility but at the present time there is not enough information to verify this hypothesis DCE is a DNAPL a suspected carcinogen slightly soluble in water and considered to be a breakdown product of both 1 1 1 Trichloroethane (TCA) and Tnchloroethene (TCE)39 It is possible that DCE was used at the Bacchus Works but given how the DCE plumes interrelate with the TCE and TCA plumes it appears plausible that the DCE present in the groundwater is the result of biodegradation of TCE and TCA Trans 1.2 Dichloroethene Trans 1 2 Dichloroethene (TDCE) can be viewed as a minor constituent with respect to the groundwater contamination It is being detected in the vicinity of monitoring well GW 10 and 'Dragun J The Soil Chemistry ot Hazardous Materials Hazardous Materials Control Research Institute Silver Springs MD 1988 16 appears to be associated with the TCE contamination This interpretation is based on knowledge that TDCE is a degradation product of TCE TDCE is a DNAPL which has some chronic health effects and is slightly soluble in water While there is a risk associated with TDCE the confidence in the dosage and its affiliated risk is low Therefore the possibility exist that EPA will adjust the dosage as additional information becomes available 1.1.1 Trichloroethane 1 1 1 Trichloroethane (TCA) is present at three locations It appears that each flow area may have a source area The source area for the WBFA and CBFA appears to be associated with the previously discussed buried waste sites The EBFA source is unknown but it is reasonable to assume that activities at Plant 3 are responsible Monitoring well GW 58 is beginning to show detectable concentrations of TCA GW 58 is downgradient of Plant 3 and SI 340 and suggest that the source may be either Plant 3 or Bacchus Lake TCA is a DNAPL not considered to be a carcinogen but it is considered to have some chronic health effects and its slightly soluble in water TCA has been used extensively at the Bacchus Works and is one of the major contaminants Tnchloroethene From the isopack map of the Tnchloroethene (TCE) it appears that there may be as many as four source areas Two of the source areas are in the WBFA and two are in the CBFA It is possible to identify one source areas as being BW 2 BW 3 and BW 11 The other source areas are not as distinct but they appear to be associated manufacturing operations The plume north of the NIROP boundary is the only location where TCE has migrated off site one of the interesting aspects of this plume is that almost all of the TCE has migrated off site suggesting that the source was a slug of contamination TCE is a DNAPL a suspected carcinogen and slightly soluble in water It is important to note that the EPA is re evaluating data on the carcinogenic effects of TCA TCA was used in Hercules manufacturing operations and like TCE is considered to be one of the primary contaminants 1.1.2 Tnchlorotrifluoroethane Hercules discovered 1 1 2 Tnchlorotrifluoroethane (Freon 113) in the initial sampling of monitoring well GW 76 This discovery prompted Hercules to analyze samples from its other monitoring wells in an attempt to obtain a better understanding of the Freon 113 contamination It should be noted that of all the hazardous constituents being detected off site Freon 113 has the highest concentration It appears that there may be as many as three source areas for the Freon 113 buried waste sites BW 2 BW 3 and BW 11 process areas upgradient of GW 49 and process units upgradient of GW 54 Freon 113 is a DNAPL which has some chronic health effects and is considered to be 10Sl 3 stands for surface impoundment #3 Commonly referred to as Bacchus Lake SI 3 was evaluated during the RFA and a determination ot no further action was made Given the contamination of groundwater downgradient of this SWMU it will be investigated further during the RFI process 17 almost insoluble in water At the present time Hercules has not determined the source or sources for the Freon 113 contamination but has acknowledged that Freon 113 was used at the Bacchus Works 4 3 Contamination Migration Following the completion of the initial groundwater monitoring system in 1985 Hercules began an assessment monitoring program to determine whether past and current practices at the Bacchus Works had or were impacting the groundwater underlying the facility The assessment monitoring program determined that the groundwater had been impacted and that the initial groundwater monitoring system was not sufficient to monitoring rate and extent of the contaminants movement Since that time Hercules has undergone a number of monitoring well installation programs that were designed to address data gaps and assess the movement of contaminants through the groundwater The early assessment monitoring also determined that hazardous constituents had migrated off site Hercules has endeavored to track and assess the migration of off site contaminants The off site contamination problem was compounded in 1993 when Freon 113 was discovered in GW 76 The Freon 113 concentration for the first second and third quarters of 1993 were 580 710 and 920 ppb respectively At the present time it is not possible to determine the extent of the contamination because of a data gap which exists between GW 76 and the northern boundary of the Bacchus Works Analytical results have detected Freon 113 downgradient ot the buried waste sites in Coon Creek in of monitoring well GW 49 downgradient of Plant 1 and downgradient of the NIROP facility It appears that the source of the Freon 113 contamination can be attributed to operations at Plant 1 and NIROP When evaluating contaminant migration it is important to realize that it is a function of the contaminants) geology hydrogeology source characteristics and the contaminant characteristics In the case of the Bacchus Works the contaminants of concern are thought to be volatile organic compounds the geology is mostly alluvial and colluvial the hydrogeology setting is best described as groundwater recharge by infiltration through unconsolidated material and the known contaminants are dense non aqueous phase liquids (DNAPL) The sources have generally been unhned pits landfills and impoundments From the above discussions on contaminant migration and Hercules groundwater monitoring system and the information presented in Section 3 It is possible to conclude that Hercules has two distinct flow areas with multiple sources and that volatile organic compounds have been released to the environment The physical characteristics of the volatile compounds is that they are dense slightly soluble in water and relative stable an aerobic environment From these generalized contaminant characteristics and the contaminant migration properties of advection dispersion and retardation it can be concluded that the concentrations of individual volatile organics constituents attenuate with time Contaminant migration at the Bacchus Works is further complicated because each of the contaminants behave differently the releases have not been uniform and the site geology and hydrogeology while not overly complex exhibits confined unconfmed and perched aquifer conditions From a review of the potentiometnc surface and contaminant isopack maps it is possible to recognize some of the migration processes at work Specifically it is possible to recognize possible source areas where a slug or intermittent pulse of contaminant has been introduced and an area where the source area has been removed Another trend that is recognized is what appears to be volatile organic constituents which are just beginning to reach the uppermost aquifer or are just beginning to dissolve in the groundwater Although not prominent it is possible to see some of the interplay between solvent and solvent breakdown products Specifically DCE appears to be dispersing more rapidly than TCE This is a condition that would be expected because DCE is not as dense as TCE making it more amiable to 18 transported by groundwater movement 5 0 SAMPLING and ANALYSIS An important element of any groundwater monitoring program is sampling and analysis The techniques employed must be adequate to assure that representative samples can be obtained At the Bacchus Works monitoring wells are sampled using dedicated and undedicated systems All samples are analyzed at Hercules on site laboratory which is certified by the State of Utah41 The on site evaluation of Hercules sampling and analysis procedures identified no problems with how samples are being obtained or processed In May 1992 at the request of Hercules the Division reviewed the groundwater sampling and analysis program as presented in a report entitled Groundwater Monitoring Sample Frequency Recommendations and Well Status Report42 In this report Hercules requested change to the sampling frequencies and sampte analytes After careful consideration the Division approved changes to Hercules sampling program Parameters were divided into the following seven groups Field Parameters List #1 Parameters General Monitoring Parameters Metals Radiological Parameters VOCs43 and nitrate nitrite and ammonia Table 5 1 identifies the specific parameters in the first five groups In addition to evaluating the analytical parameters the sampling frequency for each monitoring well was evaluated to determine whether it needed to be sampled on an annual or quarterly basis This evaluation determined that the sampling frequency could be adjusted for some of the monitoring wells Table 5 2 identifies each monitoring well and specifies the sampling frequency for each parameter group It is expected that changes may need to be made to the list of parameters and the sampling frequencies as data becomes available on the monitoring wells An example of this are recent developments at other explosive manufacturing facilities in the State of Utah where it has been determined that explosive constituents have been released to the environment Given the operational history of the Bacchus Works it will be recommended that Hercules conduct groundwater testing to determine whether explosive constituents have been released at the Bacchus Works 41 Hercules Environmental Testing Lab is certified by the State ot Utah Department ot Health Division of Laboratory Services Certificate No. E 103 expiration date November 15 1995 '"Groundwater Monitoring Sample Frequency Recommendations and Well Status Report Hercules Aerospace Company Environmental Engineering and Hygiene Department May 1992 41 VOCs refers to volatile organic compounds 19 6 0 CONCLUSIONS AND RECOMMENDATIONS The following conclusions and recommendations are based on observations review of analytical data and published reports Prior to every sampling event Hercules obtains a water level measurement for each of the monitoring wells Hercules complies this information into an annual water level report The annual report shows water level trends identifies the net water level change and reports the hydrogeologic properties for each monitoring well • The annual report is currently presenting information in text and tables It is recommended that Hercules continue presenting the information in this manner and that a potentiometnc surface map be constructed using the fourth quarter static water measurements for each monitoring well In addition it is recommended that Hercules measures the deep piezometers and report that information in the annual water level report - It is recommended that graphical representations of the potentiometnc surface data be constructed for each flow area or that the WBFA be separated for the EBFA and CBFA This separation may help to better define contaminant migration paths Hercules and the Division have chosen to address the regulated units at the Bacchus Works by grouping them into flow areas Prior to defining the flow areas Hercules and the Division had designated the regulated units into waste management areas This means that individual units may not have a specific upgradient monitoring well However it is the Division s opinion that the regulated units are adequately covered and the groundwater monitoring system is capable of yielding groundwater samples for analysis - For a more detailed discussion on the waste management and flow area concept see Section 4 0 • Due to recent analytical results it appears that groundwater upgradient of the GW 58 may be contaminated by a previously unidentified source area or SWMU With the current groundwater monitoring system there is no upgradient monitoring well for this unidentified source area The recommendation is to increase the VOC sampling frequency for GW 58 from annually to quarterly and attempt to identify the source of the volatile organic compound being detected in GW 58 During the early phases of the groundwater monitoring program at the Bacchus Works Hercules chose to use galvanized steel in the unstaurated zone above the well screen The use of galvanized casing was abandoned after it was discovered that lead and zinc were being scraped or leached from the casing resulting in increased total lead and zinc concentrations It should be noted that the metals scrapings or leachate decreased over time The decreases can be attributed changes in sampling practices (i e installation of dedicated monitoring systems) and the removal of leachable constituents from the casing After this problem was encountered Hercules began using a PVC well casing in the unsaturated zone and stainless steel in the saturated zone • Hercules has one active hazardous waste management unit that may be required to have a groundwater monitoring system This unit is the interim status OB\OD grounds The unit has a groundwater monitoring system which was not included in the scope of this CME The Division will determine whether the OB\OD grounds are required to have a groundwater monitoring system prior to issuance of the Part B permit if a groundwater monitoring system is required the Division will evaluate that system before issuing the permit In some cases the downgradient monitoring wells are located immediately downgradient of waste management units but this is generally not the case with the groundwater monitoring system at the Bacchus Works However the primary purpose of the groundwater monitoring wells at the Bacchus Works is to monitoring the contaminant plume not assess whether a unit has released hazardous waste or hazardous constituents to the environment 20 • Hercules has a groundwater monitoring system in place that allows monitoring of the contaminant plume The Division considers this system to be in compliance with all applicable regulations and administrative enforcement actions that apply to the Bacchus Works - It should be noted that Hercules is currently monitoring the movement of hazardous waste and hazardous constituents that have impacted the groundwater under the Bacchus Works facility In addition contaminants that originated from operations at the Bacchus Works have migrated off site •• Hercules continues to address source area through interim corrective measures • Of the active units at the Bacchus Works there is one which may be required to have a groundwater monitoring system the OB/OD Grounds The inactive units are covered by the flow areas • As with the upgradient monitoring wells Hercules and Division have agreed to grouping waste management units into flow areas and not requiring Hercules to have at least three downgradient monitoring wells for each waste management unit Groundwater monitoring wells at the Bacchus Works have been constructed and developed in a manner appropriate to enable the collection of representative samples of groundwater and to minimize the possibility that the monitoring well will allow contamination of either the groundwater or samples taken from the monitoring well • The galvanized steel casings did introduce contaminants into the groundwater Hercules has amended the construction and sampling practices to correct this • Hercules has also seen some increases in contaminant concentrations after source areas were addressed through interim corrective measures » There is one active hazardous waste management unit at the Bacchus Works that may be required by regulation to have a groundwater monitoring system the OB/OD Grounds The other units are no longer receiving hazardous waste or hazardous waste constituents - As with the upgradient monitoring wells Hercules and Division have agreed to grouping waste management units into flow areas and not requiring Hercules to have at least three downgradient monitoring wells for each waste management unit The regulation require that the owner or operator of a hazardous waste management facility develop and follow a written plan for obtaining and analyzing samples of groundwater extracted from its groundwater monitoring system • Hercules has a written plan for obtaining and analyzing samples of groundwater The Sampling and Analysis Plan complies with the provisions of 40 CFR Pah 265 92(a) and (b) - Hercules determined early in its sampling that groundwater had been impacted by practices at the Bacchus Works Background values for the parameters listed in 40 CFR Part 265 92(b) have been established • In May 1992 at the request of Hercules the Division reviewed the groundwater sampling and analysis program as presented in a report entitled Groundwater Monitoring Sample Frequency Recommendations and Well Status Report 44 After careful consideration the Division approved changes to Hercules sampling program see Section 5 0 for more details • It is recommended that the Sampling and Analysis Plan be amended to include testing for explosives and explosive constituents There is some concern that explosives and explosive constituents used and\or manufactured at the Bacchus Works may have migrated to the groundwater The Division recommends that starting with the third quarter of 1995 samples be collected and analyzed for explosives and explosive constituents using proposed EPA Meihod ^Groundwater Monitoring Sample Frequency Recommendations and Well Status Report Hercules Aerospace Company Fnvironmenlal Engineering and Hygiene Department May 1992 21 8330 45 Table 5 2 will be amended to include proposed EPA Method 8330 and identify the frequency for each monitoring well • It has been determined that hazardous constituents have been released to the groundwater Hercules is monitoring the migration of the hazardous constituents in the groundwater The rate and extent of contaminant migration has been studied and modeled by Hercules The contaminants appears to be following the potentiometnc surface and pulling contaminants to the north northwest Hercules installed GW-76 along the expected western edge of the contaminant piume only to discover a previously undiscovered slug of Freon as a result the extent of the contamination along the northwest edge of the plume has not been completely defined Therefore it is recommended that Hercules establish the northwesterly edge of the plume «- Hercules has established that a release of hazardous waste or hazardous constituents has occurred the Executive Secretary has been notified of the release - Hercules continues to monitor the hazardous constituents in the groundwater to assess the rate of migration and extent of the contamination Hercules will be advised of the above conclusions and recommendations The Division will make a formal request of Hercules in the near future "SW 846 22 Tables Table a i 1 Design and Consirucnon ol Groundwaior Momionng Wells Hercules Awaspace Company baccnus Works Magna Ulan W*JIN m Tolai Duom Sc » *d I larval •nil g Mwihed Co" iruct on Uau hi C J g Con iruciion Uai ah ula S al and Pack Mai L in logy Bo *hol* G«otogy C.W i 45 !«•* GW 3 SO f**t CW-3 GW-4 70 1 M GW 5 40 r**t GW-6 S9 IM( GW 7 DO I *) GW-e 1321 at GW S 01 'HI GW 10 GW n 03 U* GW 12 ^1 IM JU nl i Sta rUo Si oi (40 won Slo nbaia ^Ml |15 JJOU SujnUu Si** 140 Hoi) Su l*u Sutl (*0 aloi) (40 il i) Su. 4u Si** I (40 ll 1) Slainl™ Slav I (|5»I I) Su ton Sl**l (40 aloi) SUi L»*n ^1**l Su was Slti (15 *iolJ SUi nlais Si—I (*0 »!oi| Calvin 7Ml S'-*l (0-2J ) 5l*ni i Si- I (20 25) G Ivan z d S< il (0 55) Su i*ii Su I [SS 7 ) Galva ltd Si*.I (0 btJl Sin un Si**l (50 131 ) i c*d Si**i(0 4S) 5 <l (4S 68 ) GU a jad5t*-l(0-?6) Stanl* Si**1(26" 46) G IVB *d Si**I (0 57) Start** Si + (S7 77) G Ivan *d SL*-I [0-67") »ti W |Srj7| Go Ivan zaJ Si «l (0 100) Stajnla Sl*J (IOC 176) G Iva Sin i* •d St**l (0 SO) Sta*l (40" 6Sj G Iv* z*d Si—I (0 75) Sin la* Siwl pi lOi) C Ira I d Sl**l (0 45) 51i <• Si* I (45 SO) Galvon i»d Si *' {0 21) N ai c*m*nt liom 0 iff 7Q-m*m »'bc in a from 18 2(7 nnd S 12 m* h mik (and from 20 4 5" M.J1 c ™ |[0U) 70 m* h site jand (33 SSI and S 17 ™ h •kc (and (55 SO) M*a1 q.tm*nl (• 103) 70 ma h «.( c vend [>03 105 ) 20 40 ma n hi a d (101 IICI and n**>l e*m* i (132- 1651 N*at e*m 1 (0 46 ) 70 m**h d (46 401 and S 12 ™»n >k auod (46" 701 N-at c*m 1(0-24 ) 70 main aitca land (24 2G") d S 12 m*ih >b( una {20 40 ) Mill m 1 (0-55) 70 main ulca lind (ii S7"| « d fl 12 mash • •ca u a (57" SS ) N* team* i (0 65) 70 m**h wica *{• d (65 67-| and fl 12 mash • Ic nd(GraO) Naalcam* 1 (0-00) 70 maih *jbcj to d (OS 100") 20-40 m* h • b u d (100 132) MMI *m* I (0-40 ) 70 m«»h lib u d (46 W j d 0 12 m* h «h and(50"C5) N* I earn* | (0 60 ) 70 imh like sa d (60 7(7} 20-10 m* halca u d (7cr 105 J N*ol *m t (0 50 ) 70 Tm h k a d (10 CO") ''0-40 m* n "kca d K,0 US | N* l (0 10| 70 fTMtl O d (19 71 ) 0 12 ma*n die tm d I'M 51 1 Alkjvioi d*oo*ti I I 0 41 a d J v.i cl 11 Altivi I d pouti (0 05) «i c lufl (55 6i J) gro <H (SS 5-60 5 ) d vil c 1iS' 0*to« 68 5 Alluvial d*poad (010} ur*y undno (50 65) na dv clar*'0 i61 eiay*Y ntKon* (74 001 aiRr n* (00 160-)andu duo b*low 160" All vi I d*pouu [0-60') a d aandy ciay lo ci y y u daiorv b*tovt 6A Gia *lh/ un (0-121 *try u d (12' 2V) u ay •Halo • (2S-42*) and clayay u d«on« b*b« 42- ARim ld*po«uls [0-75) c*Jow 751 d landy clay iron* Gi *l>y ttopouti (0 1S1 Hay*, und (Iff-631 g dgi *lhr aji d t>*k>w 63 All viol d*pouu (0-64 ) layito * (64 Si) u dy ailUto • (05 17U) nd/i tH b*k» 170" Sa dv*n(0~B) wtty g awl (9 IO") wry und (10 27") aandy gmv*i(27" 551 and »lr, aa-xj Maw 55 Alkjvi I d*po*iU (0-04 1 win Mine (Jfl b*h>« 84 Gn> *ny »n (0-1Z) u dy un (12--38") a d vil lull b*k>*> 3ff Gm lly uK (0-3 ) aandy g av*1 (3" 37) utty in d armdilcin* bate* 3r GW 1 ic »• vilnc ftjH GW 2 • ic •* «d in* g aval lana o*rw** th* vil c ljfi GW-3 ac *an«d min* niddl* ot Ih halona u GWJ ii ten* ad n a gravalhy aand un I d actlvabovaa I yayunl Thawall craan a moatly i in aa dy iitowna but doai I d mo in* loo 4 ol in* ci»f y ia d Ion GW-6 aa*a ad a g »*ify aa d bul in* *c **n*d 1 rvol • land 2* lo a aandy dayalan* GW 7 IK «*nad gn ally aa d u t GW-A ii iciaanad in tn* »a dy • ftMonau I Mth lit* loo* portion o* Ih A II *a**n*d li*yad mo tna uppar fl o(Ih vil lift Th aaa* *d nt*iv I a locatKl ih* bon m 10* GW 10 ac ** *d In* MI GW 11 K'aanad th* MI C Th* * II acraan lor GW 12 1 kvfad *sih*t d to a nl 1 121.SI Table 4 i i Design ana Construction ol Grounpwaiei Moniionng Wells Hercules Aeiospace Company baccnus Works Magna Uiari Wall N m Total D pin 0rr, g */«mod Sc Co ttnjcto Mai* ol C luci F n Par> MJI* I L in logy IBo hoi* Gaoioqy GW 13 <>5 1**t GW M 40 IM GW 15 05 W GW 16 95 r**t GW 17 120 l*«t GW 10 05 laaH GW ISA GW 20 40 W GW 21 y l**t GW 22 45 laat GW 23 02 I** GW 24 104 l**t GW 25 I20l**i GW 26 174 laat GW 71 02 I « Caljio 1 ool lou Si si (11 lol| G Iva iM Si—il (0-74) 3Ui * » SI* I r7J-95| Carol* tool Caill Tool Cool* lool C hi* Tool C ni Tool C To I C t|H To I Cal.i* Too' C iji Tool Sin. lata Sla+i Galv*nz*d St**l (0 1J| [15 slot) Su ->v> St I f!5 1 0 Su Lau St I [SO iot) Su l»nSn I ('Jsioi] Su Uu Si* I (15 i I] Su PkW St I :.5 -Q.. Su lass SI* I (15 *ol] 5u I*>.1 St al [ i 5 lol] Su H JL St I pi • 1] Su I*LI Si**i (40 loi) SL I n£i-i (15 iloi) Sia I v> Eia I (15 »iot p Slo 1*3^ Zi (15 »lot) Su la 13 ul «l Pb Jon Sta 'ail 51* I (13 38) Galvan i d St *' (0 7C71 Sim I Si* 1170 051 G iva z*d St *l (0 6*) Sio.nl ss Si* 1160 04 1 G iva led Si*»i (0-0 S ) Sin I Si—^1 f05 120| G iva d St «i [0 61 ) Sn I Si I |6i t)51 Ga'vo II d St *i (0-60-) S-.ai U Si 1(66 Eft', Gaiva c*d St*ai [0 '6") Sia l*i Si* I (IB* 31 1 G iva «d i (0 10) Sia I Si I (10 30] G ' TI *d Si-* I (C 25 ) Su I I i 5 41, G tv»Ti*d Siaal (Cr &e ) Sia ba* Si * (60 0T) Gal r» d Si *l (O P4 ) Sin 1* Stw' (04 1Q4J Gnl m d 5l»l (0 94 | •^mn* 1 St"* (S4 i20) G I one d ^1«*l (0" 0?"l Sim Wis Sla*l IK2- 115) Gal or. *d Si* HO1 71 ) Sin I Si* I fl 02") Majl m nl(0 0 ) 70 nwjn ilea la d [73 75) 20-40 m* n « o [75 05) N ai cam t (0-11 ] 70 ma h *J!C u d (I 1 \3] 8 12 m* nil u d (i 3 70 ] 20-40 r>>*»h *.bca *and (20 401 N*al cam* t (0 Ca ] 70 m*»h be j t* 0 168 7C) 20-40 ma n -o.c ma d '70 05' N*a1 c*rn*nt 10 64 I 70 nvnn nlc* sand [84 6b ) 8 12 m-sh be BJ dIM J)] N 1 am* I (0 03 ) 70 n«h ni a una (S3 05) 20-40 rn* n atca aa d 105 120-| Na I am 1(0 63 ) 70 math til a und (63 fail 20-40 ma 1 ol u d 165 05> nUal c*m» t (0 67 ) 70 60) 20-40 m* n vica u d 160 00 i Ma 1 cam* I (0 18) 70 math ul u a (18 2C) 20-40 main *lc •u d 120 401 Naal am* I (0 13 ) 70 math tile aa a (i 3 l*n 20-40 m* 1 ul u d H5 31 i f4* I am* I (0-25) C MI h ul a 0 (25 ?r\ iQ-tO m* n aiea d i?r 451 hlaai am* 1 (0 70 ) 70 mvin til a a d (70" 721 3 1? mash «lea ta d \TZ 071 ^ i am* i [0 K;) 70 m* h tih a ta d (02* 04) 20 40 math mic u d (04 104 i N* I am m (0 93 ) 70 main (tea and (03 05) 20-40 mathalca u d (15 120) Ma I am I (0 D-1 ) I n*> ri fir und (04 06] 20 40 m**h ul a HI i (06 124 ) Alluvial d POMIS (0-62 ) wim tih laya Irom 25 lo 33 a d vim tin'b I * 82 S Nv aa d |0 7) with iwo I yam ol vi c tul balovi T lrwkii<atii modaiclaiy d vitnUad Sandy gtav*i (0 5) gr sa d [5 70) and •Ity aand b*low 70 in bo aho'a g ology ao *s* la' g aov> n d aqua Alluvial d oo* uthaiaahn g now m d lh tiialigiapiy app* i so sa i two Viq cas wh h v tap lad by a uky La^ Lav 125 J^] Alluvial d p •! wfi n ar* Anng downward A hglp io* Ug ol clay was *ncouniar*d in ih* lay«rs I om 25 io 95 win cUyay u d i aoaQw S5 GW 13 tuff : aa aO i th* vit Alkjv Id oomltllijii gia »ihv u d and ailty to I ih a» g art i Alluvial daooail lhnt i ka a(a Datwaa d AppaAart lo I qu g d w w d Siiiy i d (0 10) aiKy aa d 1 • bl oalow 30 (10 30-) a d Sa dygra 1(05) I y f ainal a (5-25) and sifty tand I n b low 25 Gm l>y u d (0 10 ) villi ml c uH balo* 10* So dy 0 Sa dygr 7S I (O 2C ) g al(30 75) ally am d (26 3CT) I Billy ta d bakiw f+* t cam* I (0 71 ) 7i ma-jh nca snnd (71 74 ; 70 40 m* hailca u a (74 0^1 Alluvial tao anca 1 om 0 to 00" Min u dtlo a b low 00 Sandy gna I (0 1 f ) a-ly gra I [11 75) •into (75 110) a d nyu da * b*o» 110 Silly u d |0 16) gm any d (i6 100 I and bfry adt •* b I * |00 Sfl dy grov I [0 3) «hy clayalon* 10 27) sandy clayiion* [22 40) and ally u aston* Oato- 40- GW 14 ic **n*d in th* vimc GW 15 u d GW 16 aa d lay d Ih* aiKy •a *d a why GW 17 HKi*an*d al lha bas* ol Ih* bonthola n Iti* clay«y GW 10 « aci an d in th* Iowa aitly aa d I GW ISA und lay OS ci nad 1 a wiry at a d*oth cH 71 '.a GW 20 lie Mn d al Ih* bas* ol Ih «Ky u d to GW 21 tcrea d Ml m ol Ih* dayay ailbilo a d •ay di (olh wRy sandito < GW-22 t SC a* ad tha vil GW23I acia adnthawlty u d GW-24 at aanad sa d*io • GW 25 ac *an*d nth* to war po t 0 ol Ul aihaio lay* a d Ih why sa dwoi Tha wall sciaa was placad in ih* lowar 8 o< th* g 0 airy tand with th* bono"i 7 o' th* wall tciaan hvy*d to th* any tand t a GW27i3ftCr* *t) nth* wily undilon* 2 3.-21795 TaDTC 4 1 1 Oesign and Construction ol Ground waiei Monitoring Wells Heiojles Acrosoace Company aaccnus Works Magna Uiah Wall Nam* foul Oapih Scr**n*d lni*rval D Ikng Mai hod Sc dan Construct on Mai al Casing Construct M I 's Fn Ann la Sv. I d Poc". Mjr al L 1rioloJy\fio h la Gaoioqy GW 78 1'.^1**i GW 9 105 laat GWOO 212 laat GW-31 210 laal GW-32 1S1I •! GWOJ 177 laal GW-34 103 laat GW-35 175 laat GW 36 100' n GW-37 45 laat GW 38 45 laat GW-39 J3 I *1 GW-40 4) last GW-*I C5 laat GW-«2 45 (Aal C loot Cabl* Tool Car)la Tool C*bl* Tool Cab la Tool Cab la Tool CabL, Tool Cabl* tool Cobla Tool Cobw lool Cob* To I C bl* Tool Cab>a Tool Caoia Tool Sta I n Sl«al (ii i: i> Sta lass Sla I (15 Ion Sta nlats Slaal 115 I 1) 5la n'wia Si a> (15 si I) 5iain)*S3 St al (15 sloi) Sla nau Si al (15 slolj Stai km Si al (15slol) Slaj t«vi Siaal (15 I i) SUM in Stval (15 Vol) Sun l-ia Staal [t*p ilolj Stn IMI Staal (15 slot) Sta i»33 Sla (1h sloi) S«i tf* 1|W (15 loi) Sui lass Slaal (IS si I) Sun Ins Staal (15*1 I) G I ™ id Si I (0 05 i Si* 1 Sl**lies "51 ad Sla U0 70) Slaal (03 105) GaJ arazad Slaal (Cr ia») Stamlaas Sla. I (162- 207; Gal arw d Staal (Cr 1081 Slainiaas Staal (100 09 ) G hranz+d Sta-MO- 130") Sta las Sr—I (130- 155) Gar*ar.z*dSta-.i(0" ISJ-J SianUas Staal (15 1763 Gal an ad Siaal |0" 162-) 51 BP laa Siaal (I62- 105) Gal mad Staal (0 113 ) Sla 'as 5'~<(M3 17"") G rvannad Sl*al (O ISS; Stanlaas Slaal (IS 1801 Gatv ruad Slaal (0" 731 Star la Slaal (23 45) Gal unjad Sla I (0 21 1 Sta Lass Sl> I (21 -44) Gal n ad Si ' (0 ZT\ =.!a la s Slaal (27 5?) Gal imt d 5' «i(0 10) 51Qi la 5' *' (IS 43) Gal anjad Slaal (C 3S) 511 Us 5' I (30 63) Naol cm 1(0 SI ) 70 m* h ata r»d 191 BT) 20-40 mash aiea sand (93 11*1 Waal cams I (0 63 ) 70 ash • t a ta a(83 SS I 20 40 ma n *kca aa a faS 1051 N i camani (0 174 ) 70 mash sil ca sand 1174 1761 ?0 40 mash sibc u o (176 12-1 N Icamant (0-106) 70 m ih sil ca sano ii86 iesi a 12 main iLe aa d (Ifla 2101 Naat camani (0 ITS) 70-m* n ail tand (1 8 130) 0 12 m s • b u d 11 JO- 155 r*>ai camani (0 154 J 70-m in al e sand 115* 156) 20-40 TV. I t sa o (156 177 i Na I camani (0-163) TO-mash alca nd (163 16^1 70-40 mash iiica sa d (ICS 10S I Nasi camani (O-IS-*-) 70 m n al nd (IS-*- I5S) 0 17 m. n site l sand (155 175) Nam camani (0 15fl ) 70-m *h nUca sand (15S 160") 20-40 Ta n utc sa d (160 100) fjaal Cam rt (0- 5) 70 v hajlea sa d (25 ?T) 20-40 main ale u ri (77--451 Naol camant (0-23 ) TO math ailca ta d (23 25) 20-40 math alca 1* el f?*i 44 1 Nant cama I (0-32"J 70 m h ic ta d(32 34) 20 40 mashabe d (34 13) Alluvial tatxl aitin dg val (0 0T) * IT arty v>nt) to b loo n Gm alrysandthat Si g will dapih |0-66) ndtio *n< • Ul n vii c a h (66 SO) d wRy and balo* SO 5a dj gra al (0 J) aalty tand (5 65 ) g aity sand (65 80 ) d 0 J Ty sand Bate* BO Gm «"y sand * cam throughou tha • 11* bo «hoi* * ill ry minor compowi onal Sa dy clay (0 5) g avally tand (5 1251 and ally aa d baiow i25 Gm aily sa d (O-i J wifi sily sand p<at u ol tha ooiahola Gra all,-sand (OS ) wth silty sand pia ant lo in* i*st ol th* botahcJ* Sa dy tilt (0 5) Gm Ify tand (S 20-) a d airy ta dp sa I lo in t ol tha bo ahoi» Gra Ity a.1 (0 15 ) win G Ih* sollhabo h la iry sa dpi Gra lly aa d (0-3*-) win vil lutl babw 33 Sa dy wR (0 5 ) nth tiny d baiow 5 Gra *'ry sand [OH aa dy gra al (5 27-) wim a lay j a daio a bab* 27 Gahr St* 1 • lad Staal IO" -TJ-) Slaal (20 40 ) Nant tarn i (0-2Z) 7 m n kc to d (74 24) 70 40maih«kea sa d [74 451 Naat lam r\ (0-41 | 70 ma h site d (41 43) 70 40 ma 1 ah •a d 143 bVl Nant cam m(0-|O| 70 ma h aib ta d (19 2") 70 40ma*hali u d \zrr AS 1 Gra •lly sand (0 2S) with *|ry sand iu tai d ti lo* 25 Gra lly aa d (&70I clayay alUto a (2C 54 ) Td ta dy an lo Oalow *i4 Gra ally nd (0 5 ) KIT aiHy sand balovt S GW 26 is sciaanad n th* why ta dtlo a GW 20 ic a GW 30 acruanad n Ih* wRy sand GW-31 t*ci*an*dna boil m ol ih ooranol* GW 32 tcraa ad n Ih* wRy tand GrV3]ivrw«l th wHy GW 34 1 scraanad 1 th wRy GW 3511 acraa ad Ih* wry sand GW-36 * ac aanad n in* G vally sand GW07 tc aa ad al tha Maris a batwaan in* gra titf ta d and th* vil c lull GW 30 s *cr**nad in tha *Ry aa d GW 39 CM td n tn* I jay sa dtton* GW 40 acraanad m th* aily aa d GW-41 ac aa ad at lh* ( rf barwaafl tha clay y •Irate d 11a ta dy •Mo GW 42 ti ta d ad n tha wily 3 TatJIS 4 1 1 Design and Consirucion ol Grounuwaier Monnonng Welis Hercules Aerospace Company bacchus WorKs Magna Ulan w II M m« Total Dnpih Dnllng Mathod Sc **n Co ilrucl on Mai noil Can g Co sirucU »* 1 31 b Saal a a Pack Mat ol L |ii I ny-Bo *hol* Gaol gy Comn»nt GW-43 Si I w GW-4J 11 b f*«t GW-15 35 U« GW-16 TO '••< GW-<7 125' a) GW-ie 195 1 at GW40 951 at 43 1 *t GW 51 IBS l*« GW 52 2 .'5 I** GW 53 105 !**f GW Jj 165 laai GW 55 75 1 « GW 56 16* 'an S'J :i*s» S'.a i (15 (loll Sla »u Slaal I'S I n Sta ku Si I (15»i tj Su I M Si I (IS si i| Sla lass St al (15 ilol] Sla lass Slaa< (30 >l 11 Sta 4*i> Slaal 130 il I) (15 HOI) Sla nL»ra St<t*l (15 tlotl Su kn Sla (15 tlot) Stai au Si B* [iStl i) 51a lata Si (30 al t| SL Lans Slaal (15 uolj Sin t*u Slaal (15 loll Slia I Si el |15 ii ) 5 PVC Bl !• (0 3 | Sid lu Sla"' p3 110) Su la Sla I 5 PVC Bla \ |0" 34 | Slai la Sla I (3J ?0 ] S PVC 6u k. IO"-09 V) Stai la Sia I (99 5 i->5) 5 °VC Bl k (0 140) Sia !«• Slaal |14cr 18ej 5 PVC Bla k (0 33 5) Sla la Staal (33 5 91 1 s pvc B'J < -.c-e) SimnLut Su.«l (B -UJ) 5 PVC Bunk (0 I60J Stanhvsi Si**l {166 1BJ) 5 PvC Bla k (0 220") Sta laaj Si+a' (220 275) 5 PVC Bio k(0 '43| Sin laa Slaal (143 1Q3 ] S PVC Bla * (0 130-1 SU lai Sl»>l (130 165) 5 PVC Bla k (3 50) Stop la St | 0 1Z\ 5 PVC Blank. (0 1 ei Siainiasi Slv I (176 164 } Na 1 ran, •.[HIS,', ma n n-.a ta a (26 30) 20-40 m htl tan i [ 30 51 ) N ai cam* i [0 02"l 70 m*ih *kca t* d (82" 85 ) 20-40 m* h -at in d IBS nSl Na 1 ml (0-0) 70- main al co u a (fl 0) 2O-40 ma rt at and (9 351 Na l cama t (0 31 ) 70 mo i site M d (31 3-t| 2OJ0 ma n alca u <1 ("U 70 i fl at camant (0-21 ) b ns 1(1 JZZ) 70 m n n> ad |07 94 ] 20-40 main alca sa a 104 175) N a cam* I (0- 30) bansaal (30 143) 70- » lin* « nd 1143 145 ) 10-20 ma i al aa d IMS 1951 N ai camani [0-22-1 b naa 1122--6T-) 70- m th s.1 aa d (6T 601 10-20 ma habca u d ISO 31 i tia i *T**M \Z 21 •, TO ma h ail M d (21 27 i 20-40 main alca d (73 -40 i Na t camani (0 169) 45-60 mrttn ahco land [169 i 731 20-40 math tit a sa d (173 Na I cama 1 (0" 743 ) 70 mash vi a aancF [743 J45J 20-40 m* h »l ad (245 Nanl ma I |0 147) 45-00 math aaac tand (i 5b lf.0-) 20-40 mnh ul ad (160 1831 Na I C-m* t (0 144 ) 45-90 r--t Ji alca land 144 1451 1020 ma 1 fl n aa d 1145 N 1 cam I (0 48 1 16-40 >aan hkco tang- |4o '51 Sa 0( gra »i (C l-1 51 tla,ay l na (12 5 35) ta dy I y to (35 46) nd t.ny u d I ab lo* 46 Aluv I daooati that ana do*n« nl rap at 5. try sa d (0 3T) will Silty gra I (0-6 ) wth a vil lift baio* 0 A HUM I aaq «nc con * ng ol coobly gra I vtry nd aandy alt dy g <**l nd g'a airy a nd (0 ' 16 ) win a arry tandstona oaiow 110 Si dig aval intarrm ad Hth th n baa I aly urd (0 186 ) balmv 186 a vim %jtf wai ncouni* vd Aliival aquwi That 1 f n g dovrnv* d S-tl, cla/ Id 5) a oy *H t 5 10-; ulty aa d (IO- 14) so dy gra I ('4 20) ulty land (2C 77) win land balow 20 tha top 163 a » J a vara m ad wth aand uH andorcby Atl63oviln lu" ara a cou I ad G I a d ta d (0 1 7*) uny aa dn (1 7" 35) co glomarota (35 05-) sandit na nd gravallSS S0)o d co mutant urty u d a a baloo 901 Tfi ttmt graohy n ih uppa portion of Ih both la n ra 1 lad by g aval n-th tand clay (0 169] B*«™ 190 a Co gkmamt wai a cou laradih 1 had ou rtrrt and nlcan c closl Sa Oy g a al (0 107 ) tha 1 U batwaan 107 aid 140 (coup and ol land Hon aRtton* and mudtton win a g vain d 10 a lay rou d balow 140 AJbjvi I g val d p>ia-( n<a m ad Mih tand d lay N 1 c m I (0- 128-) 45-80 ma h •! a aand (178 131 ) 10 20 -» n kco a. d ['31 164 1 No at bgi ph c vanat on obtanrad in thit -ail iinat w co Miad *ot tantJy 9 I Tha traanat) larv 1 t bcaiad at tha 1 tada a b twa*n tha aa df clayalona and lha sihv aa dat GW-44 11 acraa ad in a any tand lay* naara tha bonom ol lha borahola GW-4J ac an d n a wine GW-4Q it tcra* as a vit c tutf GW-37, acaanad al lha intaiiaea batwaa lha gra ajry la d dlhaailiyia datona GW-40'iac aanad nlha daaoasi uny ta amy GW-49 ,t acraanad n t-ly tand and aa d Tha borloTi 4 ol tn bo an la collap d balora. iha wail *1 ttalkfd GW 50 at aa ad sl IV.* fit, sand a d sn 0 n daca GW 51 11 ac aa ad in Ih* vitrc totl GW-32 it it aanad al lha bata of lha bo anol* m th* ally aand »ton* GW 53 ac aanad 1 th* PC* porno ol ih co glomaral* GW 54 11 acraanad n th* gtiv*|/iondito * lay* GW 55 11 tciaan d n lha b*r* aandy gra al by GW 56 ttcraanad at in b of in* boranol* 1 3/21/05 TabiQ 4 i 1 Design and Cor.siruction cl Giour.ov.aioi Moniionng Weils Hercules Aerospace Company oaccnus WorKs Magna Ulan Wall Na-r* Foul Oapih Sctaanad Iniarv I 0 Ik g Uathod Sc an Con livclon Mar h C *i g Coo imcit Mai* hi F fl* Pack Uai* al Uihotagyiflorahot* Gaology Cor GW 37 i<5 I <* GW S3 360 laat GW SB 245 laat GW <,Q 702 laat GW-61 "01 S '-a( GW-G6 i OS lux GW-C; 1701 a< GW*) 133 la* GW-6 9 207 laat GW 70 360 laat Cabkt Tool Su l*u Si -J (30 Hot I SUunaju Siea* (IS aloi) SUinWma Swl (30 I I) Slai lau Sl**l {tS ilotj Sia kiuSlt* (IS alotj Su L**i Si**l (IS Uotj Sta Uu Slaal (IS Wolj Slainlau Si *l (IS aloi) Sux Uu Su-al (13 uol) Su I u Si PSU IJ S PVC Bla k (0 94] Sin kt Slaal ($4 144 ) 3 PVC BlanMtJ 101) Siai l*aiS(-*l(iB3- 3617) 5 PVC Bla K(0- 106") Slat laai Slaal (186 735) 3 PVC QUnk iff 166 S) Sift I*** Sl**l(166 S 202-} S PVC Ola k (fr 103) Staniat Sla-I (103 lOo] 3 PVC Blank (0" 143) Slj las Si**l (143 1AC] 3 PVC Blank (0" 1 6") Siai l*a Si—I (128 161] 5" PVC Blank (ff-ge-J Slanlai Si**l (ge 12S) 5 PVC Blank (0- 164 Sla i*a Slaal (1G4 202) 1 PVC Bio k |0 137 | Sim latt Staal(137 317) Na ( c m*nt (0- 11 D 43-00 ma h itca land 1117 120] 10 20 m* h «ca a d (i?0 i 4) r+tai camani (0-337) 4)-fl0 ma(h atea und [337 04CH 20 40 rra i a.kca d (340 3601 NMIUN I (0- 24) b*ni«al(24 1S3) 70 ™ h uica aand (1S3 106) 10 20 maah akea d (166 24S) Naatcama I (0* 160') 70 ma h ait und (169 171) TO 40 m* h aihca aand (171 20^1 Urn 1 mo I (0" 17t | 70 (na h ait aand (171 173) 20-40 maah iiica tand (1 73 10-3) *at camant 1108 201 51 N* loam* [Iff-20") b*n ul (20- 143) n*al cam* t (143 1S7) 40- 60 m* fi ub land (157 130) 20-40 math be d(150 1651 Na I c*m*m 10* 10 | Ba M I (IS 120) naat cama i|120 14/ ) 40-60 math abea u d (147 149) 0-40 maih ate aand (150" 170") N*. t camani (ff 16) B* a«al(l6 011 naol camani (91 106) 40 60 m* n u« a land (106 100) 20-40 ma h ub aa d (100 1371 N*ai cam* l (0* 10) B* aval (10 187) n*at *m* 1 (167 176) 40-60 m* h • lea aa d (170 101 ) 20-40 maih *lea land (101 on N 1 ma I (0-10) b~nion! (10 2001 70 m* ti wbca aa d (70S 789 ) 20 40 main i-bca sa d (28J 3121 bantonia g o>Jl (317 No ttrai g aph c va nao wi A d n th H ih l wai *ncou la ad •! la dy g o» Tha unit gnphy ot th a moniVanng **ft aM* a>ng (ad ca como lad ol g vali Ail maing Uuvi I dapoatt Th* atratigrapny in in ppa 168 of tha bo hoi* aKa naang taqu* vol u dy gra I parniad by aiin landy ail o Wry u d Bate* 108 airy aandoona * lou d Sa By g a al and flu aiKy aa d [0 77) ulty la d-nhgra 1(77 113) ulat aa d land lona (115 ISO*) (and u a (1SC 17S) nd a aRitona aand to • u t aalow 175 Tha kihology ol Ui wa'l bora • eharact /ad by th c» badi ol undy n ala aapa alad by bad olganllyat Sa dy *• (OlO) d aa dy g a lbaio*10" Sandy all (0-17] a d u dy gra I balm 1? Tha UnologY o'<b • boi ho*j h raetaniad by gra I daooali wh h co tain aiying dag aa* of nd it a delay Thauppa gia aldapoata a a (*« atad from tha lo* gra al daoowbi by a airy clay layar (W 71 ) AM <n idapout (0 225) aa dilo a (775 2*0) >Um*> glayaiiolgm al aa d nil a oVo clay (740 335) and a la dwo a lay balow 335 GW-37 IICMM aa lha baaa ol th bo rah la Th bonom tool of lha borahola ca ad GW SO i Ktaanad al lha baa ol tha bo* hoi GW 39 i craa ad a gm ally aa d byar *h nana al 211 GW 60 i acra nad n th* aifty aa d GW-61 * ac aan d n lha Ion albiio «u duo a lay GW-66 i (craanad • tha Iowa u dy gra al lay* GW-6 7 K < aa dy gra I GW-68 * »c ^n*vi in tha aandy gra al GW-4J9 i we aanad lha k>w*r g I daooait* GW 70 lay* mat i 335 a *d a aand f msrxrio 5 K1f9S TaDie -i 1 i Design ana Conslruaion ol Grounawaier Mom lonng Wells Heicules Aerospace Company baccnLis WorKs Magna Uian Wall Name Total Daow Se aa d Intarval D ling Method Coni'ruclio Mat n hi C * g Cor 11 runt o Malt rife A ula Sol a a Fn- Pack Mjfc. Litho togr\D rahol* Coo log GW 71 19SI at GW 72 422' at GW 73 220 <**i pp o imal *f '83 200 GW 74 740 I f GW GW 76 'Ml *t 252 267" Slai Lns Slaal 113 slot) Sla ni*u Sl**> (0 010 llotl Su rku Si**l [IStlol) Su L™ SIW (15 uoi] SLu Ira Sl**l (15 dot} Su wu ^l**l (0 010 lot) 5 PVC Bland (CT 16(7) StTinlasl Slo I (160* 195) 5 PVC BI.1 K '0 HQ] Sta In Si**' [110 700-) S PVC BLO I- (0 73) Su M i St-*i (73 131 ) 5 PVC Bla k (0 144) l*-i Slaal (14-1 201 ) 5 PVC Blan" (O 7SI Slainu Slaal (75 11CT) S PVC BUi k (0 170-j SlanJ.it Si-a I (I 70- 267 ) N*at cam* i (C7 IO1) •« ( rala g oul (10 IC ) tj ula uanlo I (166 17' | 20-40 m#tn ak ai (171 1851 EWnaaji (0 I6S1 n al cam* I (165 1B5 ) 70 m* h 70/40- m* h 70 main ul nd aa dwich [165 703) aal camani (705 472-1 N* 11 c* • l (O S1 tMnlon 1 g out (3 109) 70 math, ate aa d [109 111) 70 40 m* n titca land (111 132") 70-m* h atca ta d (132 136") cam ni g oul [136 141 j b ton ia grout '141 770-1 N* I camani (0- 17) Oaf'OHI* n oul (17 177 ) 70 ma n at aa d [177- 100) 20 40 ma n aiica und (10O 01 I 70 ma n ate an d (201 204) cama 1 o out (2QJ 211 1 ba ion la g oul 1 740 i Maat earn* i (0-17) banionla g oul (17 06) 70-mashakca d (00 00") 70-10 h k in d (00" 1701 B «*ai[0- 13} naal earn* i (15 543) 70 math 20-4Onv h 70 m th al ca t, nd tandwch (243 260) oa a*al(7C9 273) HI cama 1 (273 4301 Sa dy gra al (OCT) ally aa d (63-67 ) nd A aa d* a (07 125) ally clay ay u d [I2S 135) aa dim. d i a[i3S 166) gnu *i tand and >)> ra 'ou d from 166 to 185 n< bafc>* 185 any aa d & aritiio Ci r y aih (0-40-) aa dy gra al (40" i751 aa d (175 105) dygra 1(105 105)a d a nda I laat oaiow 195 0 po-uLa of ma \ g ai wlh tand alt c claTi(0700j 01208- kgnt yallow day nt *»i dice a d (708 14) B*low2i4 in bo) hok» int*ia*ciad in Camp Wriama Un i Sa dygra I with auK (0 714 | day lay n 1 I 3' IC 03 05 d 217 7'4 a io a J Hit na (214 225 1 a«j IO 4 landiton bad CM 723 5>Ry aa d (0 3 ) clay ay uK (5 -34") ajlaeaou H> aa djtona (34 -6CT) aandy a* lona (6ff 75) t/fyw duo a(75 105) ana muduo a balow 105 AJkjui Idapcrvia aladapin f approamalafy 'OCT «h* waak c gfcomaral «• • cou L* ad which co t u* ufrtjl •mn mat >y 4OCT Al 400* IN badi ol aa d It nd clay « • an cou la ad balow Oi t wat ta d u Ii dl oily i n! c tuff GW71 ac aanad lha aand Lay whchoagi 131180* GW 72 ac aanad in tha aandy graval lay t 185 GW 73 ac aa ad in a arty aand t mmad laly abova a thin arty clay Lay i wheh nana at 134 GW 74 a tc aanad aa lha oaaa I Ih aandy g aval lay GW 73 ii tcraanad lo mdud* Uh* iniariaca batwaan tha arty aa dttona and in* mudatona Tha icra* ad I rv I located in a graval dapoul abo a lha e on g lorn arm la 6 Table 4 2 1 Volatile Organics Detected at the Site acetone chloroform dichlorobromomethane 1 1 dichloroethane 1,2-dichloroethane 1 1 dichloroethene methylene chloride toluene trans 1 2 dichloroethene 1 1,1 -trichloroethane tnchloroethene tnchlorotrifluoroethane Table 4 1 2 Volatile Organics Detected at the Site acetone chloroform dichlorobromomethane 1 "l-dichforoethane 1 2-dichloroethane 1 1-dichloroethene methylene chloride toluene frans-1 2 dichloroethene 1 1 1 trichloroethane tnchloroethene tnchlorotrifluoroethane Table 5 1 Hercules Groundwater Monitoring Parameter Lists Field Parameters pH conductivity temperature List #1 Parameters chloride iron manganese phenols sodium sulfate General Monitoring Parameters calcium magnesium sodium potassium chloride fluoride sulfate phenols iron manganese zinc alkalinity coliform TSS (Total Suspended Solids) TDS (Total Dissolved Solids) aluminum Metals arsenic barium cadmium chromium lead mercury selenium silver Radiological Parameters gross alpha gross beta radium 226 radium 228 Table 5 2 Hercules Groundwater Monitoring Parameter List Monitoring Well*/ Sample Parameters GW 1 GW 2 GW 3 GW 4 GW 5 GW 6 GW 7 GW 8 GW 9 GW 10 GW 11 GW 12 GW 13 GW 14 GW 15 GW 16 GW 17 GW 18 GW 19 GW 20 GW 21 GW 22 GW 23 GW 24 GW 25 GW 26 GW 27 GW 28 GW 29 GW 30 GW 3T GW 32 GW 33 GW 34 GW 35 GW 36 GW 37 GW 38 GW 39 GW 40 GW 41 GW 42 GW 43 GW 44 VOCs/organics quarrerly annual annual quarterly quarterly quarterly quarterly annual annual quarterly annual quarterly quarterly quarterly quarterly quarterly annual annual quarterly quarterly quarterly annual annual annual annual quarterly annual quarterly quarterly annual quarterly quarterly annual annuil annuil annual annual annual quarterly Field Parameters quarterly annual annual quarterly quarterly quarterly quarterly annuil annual quarterly annual quarterly quarterly quarterly quarterly quarterly annual annual quarterly quarterly quarterly annual annual annual annual quarterly annual quarterly quarterly annual quarterly quarterly annual annual annual annuil annual annual quarterly innuil List #1 Parameters quarterly annual annual annual quarterly quarterly annual quarterly annual quarterly quarterly annual annual quarterly quarterly quarterly quarterly quarterly Nitrate/Nitnte/ Ammonia annual annual quarterly quarterly quarterly quarterly annual annual annual annual annual annuil quarterly annual General Monitoring Parameters annual Metals annual annual Radiological Parameters annual annual annual annual annual annual annual annual annual annual annual HEffCMrnr; xij; 3 3J PM Pago l Table 5 2 Hercules Groundwater Monitoring Parameter List Monitoring Well #/ Sample Parameters GW 45 GW 46 _GW 47 GW 48 _GW 49 GW 50 _GW_5J_ GW 52 GW 53 _GW 54 GW 55 6W 56 GW 57 _GW 58 _GW 59 GW 60 _QW 61 _GW 62 _GW 63 QW 64 GW 65 _GW 66 GW 67 _GW 68 _GW 69 GW 70 GW 71 _GW 72 _GW 73 fjW 74 GW 75 VOCs/organics annua! annual annual quarterly quarterly quarterly annual annual quarterly quarterly quarterly quarterly quarterly annual quarterly quarterly quarterly quarterly quarterly annual quarterly annual annual annual Field Parameters annual annual annual quarterly quarterly quarterly annual annual quarterly quarterly annual quarterly quarterly annual quarterly annual quarterly quarterly quarterly quarterly quarterly annual quarterly annual annual annual List #1 Parameters annual annual annual quarterly quarterly annual quarterly annual quarterly annual Nitrate/Nimte/ Ammonia annual annual annual annual annual annual annual quarterly annuil annual General Monitoring Parameters annual annual annual annual annual annual quarterly annual annual Metals annual annual annual annual annual annual annual quarterly annual annual Radiological Parameters quarterly annual annual HEnCMrr|r).vLS334pM Parjo 2 Figures Plant 1 Bacchus West Figure 1 Hercules Aerospace Company Bacchus Works (Drawing not to scale) Appendix A \ Conglomerate Silty sand Siltsione / Claystone Gravel Clayey sand Clay Sand 8 gravel Sandstone Sandy clay f JJM «_'^- «4 Sandy gravel with clay Sandstone 8 gravel 5iMy clay Sandy gravel with si Sandstone 8 all mud matrix Sandy silty clay * * - - * r -i° Silty gravel Silt Tuff Clay 8 gravel Clayey silt Limestone Sand HERCULES BACCHUS WORKS GEOLOGIC SYMBOLS PREPARED BT EarthFax Engineering Inc DATE 11/86 GEOLOGIC LOG UJ Q O O _l o X < cr o DESCRIPTION WELL CONSTRUCTION DETAILS - 10 - 20 - 30 — 40 Pi , 1 p if u JO1 Qa Ob - Tjn Gravelly sand TD-45 Sandy silt to silty clay Clayey sand Silty to sandy gravel Vitric tuff Concrete; pad 8 protective casing 4 ggjv blank 1 70-mesh siHca sqnd 8 12 mesh silica sand f21 Neat cement •18 20 - 4 stainless blank - 25 -4 stamUss screen 40 slot -40 45 EarthFcn Engineering: Inc EarthFax PROJECT N0 c-20 M HERCULES BACCHUS WORKS WELL GW-I TOP OF CASING ELEV 4 G7IJ8 GROUND SURFACE ELEV 4G6848 STRATIGRAPHIC LOG GW-1 0'-71 Gravelly sand to sandy gravel 85% sand, 15% gravel Gravel is quartzite Sand is medium to coarse grained, angular Brown (10YR 5/3) 7,-171 Sandy silt to silty c lay Sand and small gravel is angular to subrounded Gravel ranges from 1/8" to 3/4", quartzite Gravel comprises 15% of sample volume, may be from above Increasing clay and sand with depth Moderate dilatancy, high plasticity Brown {iOYR 5/3) 171-33 5' Clayey sand Gravel content increases with depth, grading to sandy gravel Sand is medlum to coarse grained Gravel averages 1/4", subrounded, quartzite At depth, grave 1 increases to 2" Brown (IOYR 4/3) 33 5'-41' Silty to sandy grave 1 50% gravel, 40% sand, 10% silt with minor clay lenses Grave 1 is quartzite Sand is fine to coarse grained Pale brown (IOYR 6/3) 411-4 51 Vitric tuff Very fine grained, moderately devitn- fled , c lay is bentonitic Lignt gray (IOYR 7/1) GEOLOGIC LOG Q. < o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 o of. — 40 - 60 Si, °^ CO Qa Ob Qh Tjn Sandy grave! Gravelly clay Sandy gravel Gravelly sand Silly sand Sandy gravel Vitnc tuff Gravel Vitnc tuff 8 protective casing -Concrete pad 70-mesh silica sand 6-12 mean silica sand 4 stainless olank 4 stainless screen 72 slot 4 slcmless Wann TD=80 =S^3 EaxthPccr r^V^ Engineering Inc m m EarthFax PROJECT NO c-20 y HERCULES BACCHUS WORKS WELL GW-2 TOP OF CASING ELEV A 718 87 GROUND SURFACE 5LEV e 7IGJ5 STRATIGRAPHIC LOG GW-2 0 -91 Sandy gravel 60% gravel, 20% sand, 20% silt Gravel averages 1 /4' , subroundec to sub-angular, quartzite Sand is medium to coarse grained Brown (IOYR 5/3) 91-14 1 Grave lly clay Plastic, slow di latancy 50% c lay, 40% gravel, 10% sand Gravel ranges from 1/4" to 1/2', subrounded to subangular, quartzite Light brownish gray (10YR 6/2) 14 1 - 2 2 ' Sandy gravel 80% gravel, 10% sand, 10% silt Gravel ranges from 1/4" to 1/2 , subrounded Sand is poorly sorted Pale brown (10YR 6/3) 22 -28' Gravelly sand 55% sand, 30% gravel, 15% silt and clay S a rTc3 I s very fine Gravel is quartzite, limestone Brown (10YR 5/3) 2 81-3 7' Silty sand 80% sand, 10% silt, 10% gravel Sand is very fine to fine grained Brown (10YR 5/3) 3 7 ' - 551 Sandy gravel Sand is medium grained Gravel is quartzite, 1Imestone and igneous Pale brown (IOYR 6/3} 55'-67 5' Vitnc tuff Very fine grained Light gray (10YR 7/2) 6 7 5 ' - 6 8 51 Grave 1 quart2ite, llmestone, fine grained sandstone, poorly sorted 68 5'-8 0' Vitnc tuff Moderately devitrifiea, clay is ben ton- itic Gray (10YR 6/1) GEOLOGIC LOG o O a. o: DESCRIPTION WELL CONSTRUCTION DETAILS — 20 40 — 60 — 30 —100 p - o O Q ( OOQ-0 •I40 -i60 T~r TD=I65 Qh Tjn Sandy gravel Gravelly sand Clayey sandstone Sandy claystone Clayey siltstone Siltstone Sandstone Concrete pcd 70-mesh silica sand 20-40 mesh silica sand Neat cement 8 protective casing Neat cement 4 stainless bJank 4" stainless screen 15 Slot & stainless blank -nr 15 slot az ==rj^ EarthTax fj^V Engineering Inc * • Earth Fax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-3 TOPOf CASIHG ELEV J 80841 GROUND SURFACE ELEV 4 806 53 STRATIGRAPHIC LOG GW-3 0 1 - 5 1 Sandy grave 1 60% gravel, 30% sana, 10% clay Gravels range from 1/J ' to 1", suoangular Sana j.s fine to medium grained Brown (10YP ^/3) 5 ' - 9 ' Gravelly sand 50% sand, 30% a rave 1, 20% clay Brown (10YR 5/3} 91-5 91 Gravelly sand 55% sand, 40% gravel, 5% silt and clay Sand is medium to fine grained Grave 1 is quartzite Brown (10YR 5/3) 5 9 1 - 6 5' Clayey sandstone Pale brown (10YR 5/3) 65'-74' Sandy clays tone 80% clay, 10% sand, 10% gravel Light gray (10YR 7/2) 74'-82' Clayey s l 11stone 60% silt, 30% clay, 10% sand Sand is medium to coarse grained Cray (10YR 6/1) 8 2'-9 01 Same as above, but with a s1ignt increase m the clay percentage Dark gray (7 5YR &/Q) 90'-160' Si 11stone Slightly effervescent to highly effer- vescent Moderately indurated, low oermeabilitv Dark gray (7 5YR 4/0) 160 ' -165 Sandstone quartz grai permeabi1lty Very fine graired Vitnc a sn shards, ns Moderately inaurated, moderate Olive gray (5Y 5/2) GEOLOGIC LOG o o a. < or o DESCRIPTION WELL CONSTRUCTION DETAILS — 20 — 40 — 60 3^5 ^9. O o ° Fill Ob Oh T]n Sandy gravel Silly sand Gravelly sand 'D-TO Sandy clay to clayey sandstone Concrete pad 4 galv blank V 70-meah silica aand 0-12 meah ailica aantl 1 8 protective casing Neaf cemenl *8 4 stainless blank 4 afamless screen 40 slol 66 7a £arthFax r^Vl Engineering Inc • • EarthFax PROJECT NO c-20 y HERCULES 9ACCHUS WORKS WELL GW-4 TOPOFCASiNG ELEV A 704 81 GROUND SURFACE ELEV 4702 0^ STRATIGRAPHIC LOG GW-4 0 1 -13 ' Sanay gravel 65% gravel, 25% sand, 10% fines Calcic norizon ( ^ ) at 5 ' Clay content increases with depth Pale brown (IOYR 6/3) 13 ' -38 ' Silty sand 80% sand, 15% fines, 5% gravel Sand is very fine Brown (IOYR 5/3) 3 8 ' - 6 8 ' Gravelly sand 60% sand, 30% gravel, 10% fines Sand is very fine to medium grained Gravel ranges from 1/4'to 3/8", subrounded Yellowish brown (10YR 5/4) 6 8 1 - 70 ' Sandy clay to clayey sands tone Sand is very fine grained vitnc ash shards and quartz grains Clay is bentonitic, has moderate to s low dilatancy, medlurn plasticity Light gray (2 5Y 7/2) GEOLOGIC LOG X a. UJ o X o. < rr DESCRIPTION WELL CONSTRUCTION DETAILS — 10 — 20 30 — ------- Ob Oh Tjn Gravelly silt Silty sand Sandy siltstone Clayey sandstone 3 protective casing Concrete pod 70-m«sh ulicc sand 4 stainless blank S-12 nosh si'ica sand 4 stainless screen 40 slot TD-48 EartnPax Engineering; Ine EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-5 TOPOFCASlHG EL£V 4 675 77 GROUND SURFACE ELEV &G73 75 STRATIGRAPHIC LOG GW-5 0'-12' Gravelly silt 60% silt, 20% aravel, 20% clay Very dark gray (IOYR 3/1) 12'-25' Silty sand 60% sand, 20% fines, 20% gravel Sana is fine to medium grained Gravel ranges from 1/4" to 3/8", subroundea to subangular Brown (10YR 4/3) 25 1 - ^2 1 Sandy si 1 tstone Sand is vitnc ash and quartz , very fine grained Light browrish gray (2 5Y 6/2) 42'-48' Clayey sandstone Sand is very fine grained vitnc ash shards and auartz grains Cla> is bentonitic Light olive gray (5Y 6/2) GEOLOGIC LOG o o -J (J X CL < O DESCRIPTION WELL CONSTRUCTION DETAILS i - 20 10 - 60 V777X a „ oc to*** .) 0 Q • O 4 Qo' c - 30 -------- Ob Clayey sond Sandy gravel Sandy clay Qh Tjn Clayey sand Gravelly sand 8 protective casing Concrete pad Sandy clayslone 70-me3fi sclica sand 4 stainless blank 4 stainless screen 40 slot 8-12 mosh silica sand TD-85 Earl hf ai Engineering" Inc EarthFax PROJECT NO c-20 M HERCULES BACCHUS WORKS WELL GW-6 TOP OF CASING EL E V - 4 716 43 GROUND SURFACE CLEV 4 714 00 STRATIGRAPHIC LOG GW-6 Clayey sand 50% sand, 30% clay, 20% gravel Cravel ranges from 1/4" to 1*( subrounaed to subangular, quartzite Very dark grayisn brown (IOYR 3/2} Sandy gravel 50% gravel, 40% sand, 10% silt Gravel ranges from 1/4" to 3/4", subrounded to subangular Sand is medium to coarse grained Brown (10YR 5/3} Sandy clay 75% clay, 15% sand, 10% gravel Slow dilatancy, high elasticity Brown (10YR 5/3) Clayey sand 90% sand, 10% clay Sand is very fine Brown (10YR 5/3) Gravelly sand 65% sand, 30% gravel, 5% fines Sand is fine to coarse grained Gravel is quartzite, limestone and igneous Brown (10YR 5/3) Same as the above described sarrole with the clay content increasing to 20% Mtn deDtr Brown (10YR 5/3} Sandy clay stone oentonitic Sand gray (10YR 7/2) 90% clay, 10% sand Clay is is very fine vitnc ash Light GEOLOGIC LOG o o DESCRIPTION WELL CONSTRUCTION DETAILS — 80 5 8 protec'ive casing Concrete pad Gravelly sand Sandy gravel \o Gravelly sand Clayey sand Gravelly sand 70-mesh silica sand 8-12 mesh silica sand *3 6T — 4 Hamlets Wank 4 stainless screen 40 slot TD-90 EarthFax Engineering Inc EarthFax PROJECT NO c-20 W HERCULES BACCHUS WORKS WELL-GW7 TOP OF CASING ELEV 4 74017 GROUND SURFACE ELEV 4 737 24 STRATIGRAPHIC LOG GW-7 0'-3' Gravelly sana 70% sana, 25% gravel, 5% fines Sand is med mm to coarse grailed Gravel ranges from i / 4 " to 1" Brown (IOYR 5/3) 3'-18' Sandy gravel to gravelly sand 50% sand, 40% gravel, 10% fines Sand is fine to medium grained Gravel ranges from 1/4" to 1/2", subrounded to suoangular Brown (IOYR 5/3) 18 ' -26 ' Clayey sand 60% sand, 30% clay, 10% gravel Sand is very Fine grained Gravel ranges from 1/4" to 1/2", subrounded to suoangular Yellowish brown (10YR 5/4) 26'-63' Clayey sand 65% sand, 35% clay Sand is very fine grained Brown (10YR 4/3} 5 3 1 -8 7 1 Gravelly sand 60% sand, 20% gravel, 20% fines Sand is very fine grained Gravel is cuartzite Brown (10YR 5/3) 8 7 1 - 9 0 1 Gravelly sand 50% sand, 30% gravel, 20% fines Sand is fine to coarse grained Crave 1 is quartzite, limestone, a few chert clasts Yellowish brown (10YR 5/4) GEOLOGIC LOG Q_ o X < SX. DESCRIPTION WELL CONSTRUCTION DETAILS -20 3_ ° — 40 1 - 60 - BO - IOO — 120 o°< 22% Ob Tjn Silt Gravelly sand Sandy gravel Silty clay Claystone Sandy siltstone Vitnc tuff 10-02 8 protective cosing Concrete pad 4 gaiv blank 70-tTiesh ii'ica sand 20-40 mesh silica sand 55 •Neat cement 9S (00 — 4 stainless blank I06" 4 slarnless screen 15 slot az EarthPax r^Vi Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-8 TOP OF C AS IMG EL£V - ^ 685 67 GROUNO SURFACE ELEV ^682 67 STRATIGRAPHIC LOG GW-8 0'-6' SiI t Brown (10YR 5/3) 6'-13' Gravelly sand 60% sand, 35% gravel, 5% silt Sand is very fine to med i urn grained Gravel ranges rrom 1/4' to 3/8', suoangular to subrounded, quartzite, limestone Light yellowish brown (2 5Y 6/4 ) 13'-29' Sandy gravel 80% gravel, 15% sand, 5% silt Gravel ranges from 1/4' to 2', subrounded, quartzite, limestone Sand is very fine to medium grained Pale brown ( IOYR 6/3) 29'-50' SUty cl ^y 50% clay, 40% silc, 10% sand Sand is very fine to coarse Yellowish brown (IOYR 5/4 ) 50 1 - 6 5' Silty clay 45% clay, 40% silt, 10% sand Clay is bentonitic Sand is vitnc ash, ver/ fine to fine grained Light brownish gray (2 5Y 6/2) 6 5'-9 5 ' Clays tone 95% clay, 5% silt Clay probably derived through alteration of volcanic ash Light olwe gcay {5Y 6/2} 9 5 ' -1 2 0 ' Sandy s 11 ts tone 75% silt, 25% sand Silt is vitnc ash, sand is quartz and vitric ash, very fine grained Light olive gray (5Y 6/2) 1 2 0 1 -1 2 5 1 Vitnc tuff Verv fine grained, white (10YR 3/1) 1 2 D 1 - 1 32 1 Vitnc tuff De vitrified, clay is bentonitic White ( 1 0YR 8/1 ) GEOLOGIC LOG o o X < cr o DESCRIPT ION WELL CONSTRUCTION DETAILS * I 01 * 0 0 1 < - 20 - 60 Qb Oh Sandy silt Silty gravel Silty sand Sandy gravel Silty sand Concrete pad 8 protective casing 70-mesh silica sand 8-12 mesh silica sand i stainless blank 4 stainless screen 40 slot T0-G5 EartiiFaz T^Vl Engineering Inc o EarthFax PROJECT NO c-20 $ HERCULES BACCHUS WORKS WELL GW-9 TOP OF CASING ELEV 4 "'36 IO GROUND SURFACE ELEV A 734 05 STRATIGRAPHIC LOG GW-9 0'-7' Sandv silt 60% silt, 35% sana, 5% gravel Sand is very fine to fine crajred Verv dark: grayish brown (IOYR 3/2) 7'-19 ' Silty gravel 70% gravel, 20% silt, 10% sand Gravel ranges from 1/4' to 1/2", angular to subrounded, auartzite Sand is very fine to fine grained Brown (IOYR 5/3) 19'-27' Silty sand 60% sand, 40% silt Sand is very fine grained , some coarse Brown (IOYR 5/3) 27'-55* Sandy gravel 60% gravel, 30% sand, 10% silt Gravel as above Sand is coarse to very coarse Brown (10YR 5/3) 55'-651 Silty sand 60% sand, 25% silt, 15% gravel Crave 1 and sand as above Brown (10YR 5/3) GEOLOGIC LOG ID O _J u T 0_ <t cr o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 O ft — 40 - GO - 80 - IOO 0 • « 0 Oi Ob Oh Tjn Sandy gravel Silly sand Sandy gravel Silty gravel Vitnc tuff 8 protective cosing Concrete pad 70-mesh silica sand 20-4Q mesh stlica sand 4 stainless blank 4 stainless screen 15 slot TD-105 EcxrUiFcLX Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-IO TOP OF CASING ELEV - 4 794 49 GROUND SURFACE CLCV d 791 64 STRATIGRAPHIC LOG GW-10 0 ' -10 ' Sandy gravel 50% gravel, 40% sand, 10% fines Gravel ranges from 1/4" tQ 1/2", subrounded to subangular, auartzite Sand is coarse Dark grayish brown {IOYR 4/2) 10'-2 2 ' Sandy gravel 55% gravel, 35% sand, 10% silt Gravel ranges from 1/4' to 3/8', angular to subrounded, quartzite Sand is med i urn to very coarse grained Light yellowish brown (10YR 6/4) 22'-47' Silty sand 70% sand, 25% silt, 5% fine gravel Sand is very fine Grained Light orowmsh gray (2 5Y 6/2) 47'-67' Sandy gravel 65% gravel, 25% sand, 10% silt Gravel is mostly auartzite, some igneous Sand is very fine to coarse Lignt vellowish brown (2 5Y 6/4) 67 ' - 8 4' Silty grave 1 50% gravel, 35% fines, 15% sand Gravel as above Sand is very fine to coarse grained Yellowish brown (10YR 5/4) 84 ' - 9 4 ' Vitnc tuff Very fine to coarse grained , quartz and vitnc ash Moderately devitrified Liaht gray (2 5Y 7/2) 94 ' -105 Vitnc tut f as abcve, out light olive gray (5Y 6/2) GEOLOGIC LOG X I— a_ LU a DESCRIPT ION WELL CONSTRUCTION DETAILS -3 J «— 20 — 40 - 60 — eo Oa Ob Tjn Gravelly sill Sandy silt Vitnc tuff 8 proactive casing Concrete pad 4" gatv blank 70-mesh sidca sand 20-40 mesh silrca sand •Neat cement 4 stainless blank err 4 stainless screen 15 slot -4 stainless blank •80- «5 EcaihFcnc Engineering Inc EarthFax PROJECT N0 c-20 U HERCULES BACCHUS WORKS WELL GW-li TOP OF CASING CUEV •A 728 74 GROUNO SURFACE CLCV 4 726 36 STRATI GRAPH IC LOG GW-1I Gravelly silt 40% silt, 30% gravel, 30% sand Sand is very fine to fine grained Cravel ranges from 1/4" to 2", anaular to subrounded, auartzite Brown (IOYR 5/3) Sandy silt ^5% silt, 30% sand, 25% gravel Sand is fine to coarse grained Cravel averages 1/4" subrounded to angular, quartzite and igneous Light brownish gray (2 5Y 6/2) Vitric tuff Moderately devitrified, clay is benton- itic Contains some quartz grains Lioht gray (5Y 7/3) Vitric tuff Slightly devitrified Lient gray (5Y 7/3) GEOLOGIC LOG X LiJ Q O o DESCRIPTION WELL CONSTRUCTION DETAILS — :o — 20 30 — 40 50 Ob Tjn Gravelly silt Sandy gravel Silty sand Sandstone Concrete pod 4 galv blank i v 70-mesh silica aand 8-12 mesfi silrco sand 8 protective casing J3* I -Neat cement - 4 stainless blank - z*r 4 stainless screen 40 slot TD=5I f6 EarthFax EailhPccx Engineering Inc PROJECT No C-20 HERCULES BACCHUS WORKS WELL GW-12 TOP OF CASINO ELCV 4 800 91 GROUNO SURFACE CLEV 4 798 02 STRATIGRAPHIC LOG GW-1 2 0'-3' Gravelly silt *5% silt, 30% gravel, 10% sand, 15% clay and organics Cravels range from 1/4" to 1 3/4", subangular to subrounded Very aark brown (IOYR 2/2) 3 ' - 3 2' Sandy gravel 60% gravel, 30% sand, 10% silt Gravel ranges from 1/4" to 2", subrounded to subangular Sand is medium to fine grained, quartz and vitnc ash Light yellowish brown (10YR 6/*) 321-3 7' Silty sand 60% sand, 35% silt and clay, 5% grave 1 Sand is fine to coarse grained vitnc ash and quartz Gravel ranges from 1/4" to 1/2', suorounded Brown (10YR 5/3} 3 7 '-51 1 Sandstone Very fine to fine grained Pale brown (10YR 6/3) GEOLOG IC LOG X t- CL UJ O o X a. < cr o DESCRIPTION WELL CONSTRUCTION DETAILS 8 protective casing Concrete pad 20 40 — 60 — 80 bo" 0^ O o * o V " 0 3d !Oi > 0 o Oa Ob Qh Tjn Sandy gravel Sand Silt Sandy gravel Vitnc tuff 70 mesh silica sand 20-40 mesh silica sand — 4 stainless blank 60 4 stainless screen 15 slol TD-95 o EarthPcac Engineering Inc EarthFax PROJECT N0 c-20 HERCULES BACCHUS WORKS WELL GW-13 TOPOFCASlHG ELEV 4 78*2? GROUND SURFACE ELEV 4 78177 STRATIGRAPHIC LOG GW-13 Sandy cravel 50% gravel, 40% sana Cravel ranges from 1/4" to 2 1/2", angular to subangular Sand is very fine to fine Dark grayisn brown (10YD 4 / 2) Sand 90% sand, 5% gravel, 5% silt Sand is very fine" to medium grained Gravel ranges from 1/4" to 3/8", angular to subangular, quartzite and igneous Brown (IOYR 5/3) Silt 90% silt, 10% sand Sand is very fine to coarse Brown (10YR 5/3) Sandy gravel 70% gravel, 20% sand, 10% silt Gravel is 50% auartzite, 50% igneous Brown (10VR 5/3) Sandy gravel 65% gravel, 25% sand, 10% silt Gravel is quartzite Sand is very fine to coarse grained Brown (10YR 5/3) VItric tuff Very fine grained Light gray (2 5Y 7/2) Vitnc tuff as above, but devitrified GEOLOGIC LOG UJ o o o a. cc o DESCRIPTION WELL CONSTRUCTION DETAILS 10 - 20 -30 TD-40 Ob Tjn Silty sand Vitnc tuff Vitnc tuff Concrete pad 4 galv blank 70 mean silica sand 8-12 mesh silica send- 20-40 mesh silica sond- 4 stainless blank 4 stamless screen 15 slot -se •«cr EexrtJiFccr Engrneerlna; Ine EarthFax PROJECT NQ c-20 kHERCULES BACCHUS WORKS WELL GW-14 TOP OF C AS IH 0 ELEV - 4 804 69 GftOUNO SURFACE ELEV ^80177 STRATIGRAPHIC LOG GW-14 Silty sand 90% sand, 10% silt Sand is fine to medium grained Brown {IOYR 4/3) Vitnc tuff Very fine graired vitnc ash Contains some medium grained quartz sand Brown (IOYR 5/3} Vitnc tuff as above, but moderately devitrified Pale brown (IOYR 6/3) GEOLOGIC LOG o o X a. < cr DESCRIPT ION WELL CONSTRUCTION DETAILS 8 protective casing Concrete pad — 20 •Sod 40 — 60 80 a * Ob Oh Sandy gravel Gravelly sand Silty sand 70 mesh silica sand — — 20-40 mesh silica sand 4 stainless blank 4 stainless screen 15 slot TD=95 m EarthFax EcrxtriFerr Erigineering; Ine PROJECT No C-20 HERCULES BACCHUS WORKS WELL GW-15 TOP Of CASINO ELEV 4 88^ 21 GROUND SURFACE ELEV 4 88166 STRATIGRAPHIC LOG GW-15 0'-5' Sandy gravel 45% gravel, 45% sand, 10% silt Gravel ranges from 1 / £ " to 3/8', subrounded to subangular, quartzite, 11mestone Sand is med mm to coarse grained Brown (IOYR 5/3) 5'-20' Gravelly sand 60% sand, 25% gravel, 15% silt Sand is very fine to very coarse Gravel as above Yellowish brown (IOYR 5/4) 20'-50' Gravelly sand 70% sand, 25% gravel, 5% silt ana clay Sand is very fine to coarse Gravel as above Yellowisn brown (10YR 5/4) 50'-70' Gravelly sand 70% sand, 15% gravel, 15% silt Sand is from very fine to very coarse Gravel is quartzite, limestone and igneous Light yellowish brown (10YR 6/4) 70 ' -95 Silty sand 60% sand, 30% silt and clay, 10% gravel Sand is very fine to very coarse Cravel is quartzite, limestone, ana igneous Brown (10YR 5/3) GEOLOGIC LOG X r-CL Ul O O o _1 X < cc DESCRIPTION WELL CONSTRUCTION DETAILS , 53 ' o «— 6 °- - 20 — 40 — GO - SO c I , 1 °. o J Oa Ob Oh Sandy gravel Sandy silt Silty clay Silty gravel Sandy gravel Silty sand 8 protective casing Concrete pad 70-rnesh silica sand 8-I2 mesh silica sand - •- 4 stainless screen 40 slot TD-95 EcailiFcrx Engineering; Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-I6 TOP OF CASING ELEV 4 88847 GROUND SURFACE ELEV 4 885 30 STRATIGRAPHIC LOG GW-16 Sandy gravel 65% gravel, 20% sana, 15% silt Gravel ranges from 1 /&1 to 1/2 , rounded to subrounded, quartzite Sand is fine to medium grained Brown (10^R a/3) Sandy silt 60% silt, 25% sand, 15% clay Sand is very fine to fine grained Brown (IOYR 5/3) Silty clay 70% clay, 30% silt Slow di latancy, high plasticity Brown (IOYR 5/3} Silty gravel 65% gravel, 20 silt and clay, 15% sand Cravel is quartzite Sand is very fine to coarse grained mafics and quartz Yellowish brown (10YR 5/4) Sandy grave 1 50% gravel, 30% sand, 20% silty clay Gravel is quartzite Sand is very fine to very coarse grained Light yellowish brown (10YR 6/4) Si 1ty sand 60% sand, 25% silt, 15% gravel Sand is very fine to coarse grained (mostly fine) Light yellowish brown (10YR 6/4) and brown (10YR 5/3) GEOLOGIC LOG o X < CC o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 — 40 - 60 - ao - ioo rTTO 0-0° Ob Oh Tew Sandy gravel Gravelly sand Silty ^nnri Silty clay Gravelly clay Clayey sandstone TD-120 •8 proleciive casing Concrete pad 4 galv blank 1 70-rnesh silica sand 20-40 mesh silica sand Neat cement 93 95 • 4 stainless blank •A stainless screen 15 slot m EarthFax EcrrUiFcoc Encjlneerino; Inc PROJECT No C-20 HERCULES BACCHUS WORKS WELL GW-17 TOP OF CASINO ELEV - 491937 GROUND SURFACE ELEV 4 916 30 STRATIGRAPHIC LOG GW-17 0'-7' Sandy gravel 75% gravel, 20% sand, 5% silt Cravel ranges from l/i" to 1/2"+, subrounded to subangular, quartzite Sand is very fine to coarse grained Brown (IOYR 5/3) 7 ' - 2 3 ' Gravelly sand 60% sand, 30% gravel, 10% silt Sand is very fine to coarse grained Gravel ranges from 1/4" to 1/2", subrounded to subangular, quartzite Yellowish brown (IOYR 5/4) 23'-2 5' Silty sand 85% sard, 10% silt, 5% grave 1 Sand is meaium to very coarse grained cuartzite Brown (10YR 5/3) 25 *-65' Silty clay 80% clay, 15% silt, 5% sand Sand is very fine grained No dilatancy, high plasticity Light yellowisn brown (10YR 6/4) 65'-83' Silty clay 90% clay, 10% silt Shell fragments C5) Slow dilatancy, hiah plasticity Light gray (5Y 7/2) 8 3 '-9 5' Grave lly c lay 50% clay, 35% gravel, 10% sand, 5% silt Sand i s very fine S low d 11 a tancy , meaium plasticity Light yellowish brown (10YR 6/4) 95'-120' Clayey sandstone Sand is very fine to medium grained Brown (10YR 5/3) GEOLOGIC LOG X h- o_ ui o o o X a. <. m o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 - 40 - 60 — 80 ,Q - XTB" >.o* 0b Oh Gravelly sand Silly sand Gravelly sand Silfy sand Sandy gravel Silty sand 8 protective casing Concrete pad 70-mesh silica sand —• 20-40 mesh ulica sand 4 stainless blank 4 stainless screen 15 slot TD-85 EaithFcoc Encririeering; Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-18 TOP OF CASING ELEV - 4 874 92 GROUND SURFACE E LEV - 4 872 42 STRATIGRAPHIC LOG GW-18 O'-IO' Gravelly sand 50% sand, J0% gravel, 10% fines Sand is fine to coarse grained Cravel ranges from 1/4" to 3/3", subangular to angular, quartzite and igneous Brown {IOYR 5/3) 10-25' Silty sand 60% sand, 25% silt, 15% clay Sand is very fine to medium grained Brown (IOYR 4/3) 2 51-3 0 ' Gravelly sand 50% sand, 35% gravel, 15% silt Sand is fine to coarse grained Gravel is mostly quartzite, some limestone Yellowish brown (10YR 5/4) 30 '-55 ' Silty sand 70% sand, 30% silt Sand is very fine grained Brown (10YR 5/3) 55 ' -64 1 Sandy gravel 60% gravel, 30% sand, 10% silt Gravel is quartzite Sand is fine to coarse grained Yellowish brown (10YR 5/4) 64 ' - 8 5 ' Silty sand 60% sand, 30% fines, 20% gravel Sand is very fine to coarse crainea Grave 1 is quartzite Yellowish brown (IOYR 5/4) GEOLOGIC LOG UJ a o o x a. < tr o DESCRIPTION WELL CONSTRUCTION DETAILS mi ••So „o\e ^2 - 20 - <10 — GO 80 TD-89 Ob Qh Gravelly sand Gravelly sand Sandy si Silty sand 8 protective casing Concrete pad 70-mesh silico sand 20-4Q mesh silica sand i slamless blank 4 stainless screen 15 slol • • EccrthPcrx Encjineeririg; Iric EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-I9A TOP OF CASIHG ELEV - 488561 GROUND SURFACE ELEV 4 883 28 STRATICRAPHIC LOG GW-19A 0'-5' Gravelly sand 70% sand, 20% gravel, 10% s_lt Sand is very fine to coarse grained Cravel ranges from 1/4' to 1", angular to suoangular, auartzite Very dark grayish brown (IOYR 3/2) 5 ' -17' Gravelly sand 80% sand, 10% gravel, 10% silt Sand is fine to coarse grained Gravel ranges from to 1/2" , subanoular to subrounded, auartzite Brown (10YR 5/3J !7'-30' Sandy silt 60% silt, 40% sand Sand is very fine grainea with <5% coarse grained Pale brown (10YR 6/3) 301-35' Silty sand 50% sand, 30% silt, 20% gravel Sand is very fine to coarse grained Cravel is predominantly igneous, with some quartzite Yellowish orown (10YR 5/4) 35'-89' Silty sand 60% sand, 30% silt, 10% gravel Sand is very fine to coarse grained (mostly coarse) Gravel is quartzite and igneous L.ght yellowish brown (10YR 6/d) GEOLOGIC LOG UJ Q o o X a. •< tr o DESCRIPTION WELL CONSTRUCTION DETAILS — !0 — 20 30 " - ' ' f • ^ Ob Tjn Silty sand Silty sandstone Sandy siltstone 6 protective casing Concrete pad 4 gatv blank 70-mesri silica sand 20-40 mesh silica sand- Neat cement 4 stainless Wank - W •4 stainless screen 15 slot TD=40 EcrjthPca: Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-20 TOP OF CASINO ELEV - 4 894 25 GROUND SURFACE CLEV & 892 15 STRATIGRAPHIC LOG GW-20 Silty sand 50% sand, 30% silt, 15% gravel, 5% clay Sand is very fire to very coarse Cravel ranges from 1/4" to 1/2", suoangular to subrounded Very dark gray (IOYR 3/1) Si 1ty sands tone Very fine to medium grained Some fines are vitnc ash Light gray (IOYR 7/2) Sandy siltstone Sand is very fine to medium grained, D r e d om l na n 11 y vitnc ash, some quartz Light brownish gray (IOYR 6/2) GEOLOGIC LOG o o X a. < o DESCRIPT ION WELL CONSTRUCTION DETAILS Cr.*5 - 10 - 20 — 30 Ob Sandy gravel Clayey siltstone Silty sandstone Concrete pad 6 protective casing 20-40 mesh silica sand 4 stainless blank 4 stainless screen 15 slot TD-3T =S^^ EarthFax r^Vt Engineering Inc • • EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-21 TOP OF CASINO ELEV 4 893 32 GROUND SURFACE ELEV 4 89107 STRATICRAPHIC LOG GW-21 Sandy gravel 60% gravel, 30% sand, 10% nonplastic fines Grave 1 ranges from 1/4" to 3/8', subrounded to suoangular, quartzite Sand is medium to coarse grained Grayish brown (IOYR 5/2) Clayey s111stone 70% silt, 20% clay, 10% sand Sand is very fine grained, contains some vitnc ash Light brownish gray (2 5Y 6/2) Silty sandstone Sand is very fine to medium grained, oredoninantly auartz, some vitnc ash Brown (IOYR 5/3) GEOLOGIC LOG o O X 01 < tr o DESCRIPTION WELL CONSTRUCTION DETAILS - |D - 20 - 30 — 40 Ob Tjn Gravelly sand Vitnc tuff Concrete pad 8 protective casing 70-mesh silica sand 20-4O mesh silica sand 4 stainless screen 15 1J0I TD-45 EarthFax EcathFcrr Encrineerlng Inc PROJECT No C-20 HERCULES BACCHUS WORKS WELL GW-22 TOP OF CASINO ELEV - 4 912 21 GROUND SURFACE ELEV A 9)0 09 STRATIGRAPHIC LOG GW-22 Gravelly sand 65% sand, 25% gravel, 10% nonplastic fines Sand is very fine to medium grained Cravel ranges from 1/4 1 to 3/4", angular to subrounded Light brownish gray (2 5Y 6/2} Vitnc tuff Very fine to fine grained Light brownish gray (2 5Y 6/2) and light gray (5Y 7/2) GEOLOGIC LOG o o _l (J X < o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 — AQ - 60 - 80 O °. [0 ° p p 0 £T o; o • o « o o > » O Concrete pad 8 protective casing Oh Sandy gravel Gravelly sand Sandy gravel Silty sand 70-mesh silica sand 8-12 mesh silica sand 72" A stainless Wank 4 stainless screen 40 slot TD-92 n EarthFax EcrrLhFcrjx Englneerlna; Inc PROJECT No C-20 HERCULES BACCHUS WORKS WELL GW-23 TOP OF CASING ELEV A 905 06 GROUND SURFACE ELEV - A 902 76 STRATIGRAPHIC LOG GW-23 0 ' - 2 6' Sandy gravel 50% gravel, 30% sand, 20% silt and clay Gravel ranges from 1/4' to 1', subrounded to angular Sand is meaium to coarse grained Yellowish brown (IOYR 5/4) 26'-30' Gravelly sand 70% sand, 20% gravel, 10% silt Sand is medium grained Gravel ranges from 1/4" to 1/2", subroundea to angular Brown (10YR 5/3) 30'-75' Sandy grave 1 50% gravel, 30% sand, 20% silt and clay Sand is very fine to coarse Yellowisn orown (10YR 5/4) 75'-92' Silty sand 65% sand, 25% silt, 5% gravel, 5% clay Gravel is quartzite Sand is medium to very coarse grained Light yellowish brown (10YR 6/4) GEOLOGIC LOG a. UJ a o O DESCRIPTION WELL CONSTRUCTION DETAILS - 20 - 40 - 60 - 80 - 100 'L TD«(04 > o o Ob Oh Tew 6 protective casing Concrete pad 5andy gravel Clayey silt Silty clay Sandy gravel Sandstone 70 mesh silica sand 20-40 mesh stlica sand - - 4 stainless plank 4 stainless screen 15 slot 7V"V EarthFcrr Engrlneerlna Inc EarthFax PROJECT NO c-20 y HERCULES BACCHUS WORKS WELL GW-24 TOP OF CASING ELEV 489197 GROUND SURFACE ELEV 4 089 29 STRATIGRAPHIC LOG GW-2 4 0 1 -15' Sandy grave I 65% gravel, 25% sand, 10% silt, 5% clay Gravel ranges from 1/d" to 1',, subangular to subrounded, quartzite Sand is medium to coarse grained Brown [IOYR 5/3) 15 '-2 2 ' Clayey silt 50% silt, 25% clay, 20% sand, 5% gravel Sand is very fine Gravel is quartzite No dllatancy, medium plasticity Pale red (2 5YR 6/2) 22 1 - 4 3 ' Silty c lay 60% clay, 35% silt, 5% gravel No d11 atancv, medium to high plasticity Brown (7 5YR 5/4) 43 ' - 9 01 Sandy gravel 55% gravel, 25% sand, 20% silt and clay Gravel is quartzite Sand is very fine to coarse grained Several gradational contacts are present between clay and gravel in this sample interval Pale brown (10YR 6/3) 90 ' -1041 Gravelly sands to n e Very fine to coarse grained 10% gravel Is 50% quartzite, 50% igneous Brown (10YR 5/3) GEOLOGIC LOG o o -I t_) X a. < or DESCRIPTION WELL CONSTRUCTION DETAILS Concrete pad 8 protective casing - 20 - 40 - 60 - 80 -100 i Oa o loj io|°f » » * olo. q «,o, I* « a -e«. 1] a Qh Tew Sandy gravel Silty gravel Siltstone Silty sandstone 70-mesh silica sand 20-40 mesh silica sand 4 stainless blank 4 stainless screen 15 slot TD=I20 EarthFax J^f^Vl Engineering- Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-25 TOP OF CASING ELEV 4 892 32 Off•UNO SURFACE ELEV 4390 05 STRATIGRAPHIC LOG GV-25 0'-17' Sandy gravel 50% gravel, 35% sand, 15% silt and clay Gravel ranges from 1/4" to 1', angular to subangular Sana is medium to coarse grained Brown (7 5YR 5/2) 17'-7 5' Silty grave 1 60% gravel, 25% silt, 10% clay, 5% sand Cravel ranges from 1/4' to 1/2", subangular Brown (IOYR 5/3} 75'-93' Sandy sl1tstone 15% very fine grained quartz sand Yellowish orown (IOYR 5/4) 93'-110' Gravelly silts tone 15% gravel is quartzite and igneous Pale brown (IOYR 6/3) 110 1 -120 1 Silty sandstone Very fine to coarse Light yellowish brown (10YR 6/4) GEOLOGIC LOG o X a. < cc DESCRIPTION WELL CONSTRUCTION DETAILS - 20 - 40 n-STj ~ 0 - 60 - 80 - FOO - 120 Ob D 0 o • O O , Q O -I >° o O-Q - \° Oh Tew Silty sand Gravelly sand Silty sandstone Concrete pad 8 protective casing 70-mesh silica sand .. 20-40 mesh silica sand 4 stainless blank A stainless screen 15 slot TD=I24 Ecrrth-FcEX Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-26 TOP OF CASINO ELEV A 820 77 GflOUNO SURFACE CLEV 4 818.23 STRAT ICRAPHIC LOG GW-26 O'-IS' Silty sand 60% sand, 30% silt, 10% clay Sand is very fine to fine grained Slow dilatancy, low plasticity Grayisn Drown (IOYR 5/2) 16 ' -108 1 Gravelly sand 4 5% sand, 40% grave 1, 15% silt Sand is very fine to coarse grained Cravel is quartzite with some igneous Brown (10YR 5/3) 108'-124' Silty sand s tone Very fine grained quartz, some vitnc ash Grayish brown (2 5Y 5/2) GEOLOGIC LOG CL o o X a. < or o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 -40 -€0 - 60 Qb Tew Sandy gravel SiMy claystone Sandy claystone Silty sandstone Concrete pad 6** protective casing 4" gatv blank 70-mesh silica sand 20-40 mesh silica sand I I Neat cement •IT 74 4 stainless blank 4 stainleji screen IS slo I TD-92 •t EconliFcLT Engineering Inc EarthFax PROJECT NO c-20 M HERCULES BACCHUS WORKS WELL GW-27 TOP OF CASINO ELEV 4 85309 GROUND SURFACE ELEV 4 85054 STRATIGRAPHIC LOG GW-2 7 Sandy gravel 70% gravel, 15% sand, 15% silt and clay Gravel ranges from 1/4" to 1 ', rounded to angular, quartzite Sand is very fine to coarse Brown ( IOYR 5/3) Silty claystone Contains 10% quartzLte gravel, 1/4" to 3/8" diameter Light yellowish brown (IOYR 6/4) Sandy claystone Sand is very fine grained, contains some v. ltric ash Light brownish gray ( IOYR 6/2) grading to grayish b rown (10YR 5/2) with deptn Silty sandstone Very fine to medium grained, contains some vitnc ash 5% gravel is quartzite and igneous Brown (IOYR 5/3), light yellowish brown (2 5Y 6/3), pale brown IOYR 6/3) GEOLOGIC LOG o o _J u X a. <t or DESCRIPT ION WELL CONSTRUCTION DETAILS - 20 - 40 - GO - SO - 100 -o. ° "a* » Qb Oh Tew Sandy gravel Silty sand Gravelly sand Silty sand Silty sandstone Concrete pad 4 galv blank 70 mesh silica aand- 20-40 mesh silica sand •3" protective casing 1 1 I 1 •Neat cement 4 slarrtless blank sr 93 4 stainless screen IS slot TD-II5 EcalnFcor. Engineering; Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-28 TOP OF CASING ELEV 4 619 06 GROUND SURFACE ELEV 4 6V6 85 STRATIGRAPHIC LOG GW-28 0 ' -10 ' Sandy gravel 60% gravel, 25% sand, 15% silt Gravel ranges from 1/4" to 6", with cobbles and boulders up to 2', subrounded to subangular, quartzite with some igneous Sana is meaium to coarse grained Brown (IOYR 5/3) 10'-25' Silty sand 70% sand, 20% silt, 10% gravel Sand is medium to coarse grained Gravel is quartzite, limestone and igneous Pale brown (10YR 6/3) 25'-40' Gravelly sand 45% sand, 40% gravel, 15% silt and clay Sancl i s fine to coarse grained Gravel is quartzite, limestone and igneous Very pale brown (10YR 7/4) 40'-50' Gravelly sand 65% sand, 25% gravel, 10% silt Sand is fine to medium grained with very few coarse grains Gravel as above Brown (10YR 5/3) 50 ' -75' Gravelly sand 75% sand, 15% gravel, 10% silt and clay Sancl Fs medlum to coarse grained Gravel is quartzite Pale Drown (10YR 6/3) 75'-90' Gravelly sand 65% sand, 20% gravel, 15% silt and clay Sand is fine to medium grained Gravel is 50% quartzite, 50% igneous Pale brown (10YR 6/3) 90'-97* Silty sand 75% sand, 10% silt, 10% clay, 5% gravel Sand is very fine to very coarse grained Gravel is quartzite Pale brown (10YR 6/3) 97'-ll5' Silty sands tone Very fine grained, contains some devitnfiea ash Light brownish gray (2 5Y 6/2) GEOLOGIC LOG o o _l I OL < cr DESCRIPTION WELL CONSTRUCTION DETAILS o,, - 20 - 40 - GO - 80 — IOO TO. SO ° Q ° O <5 3£Se 1 * Ob Oh Tew Gravelly sand Gravelly sand Silty sandstone Sand Concrete pad 4 cjalv blank i 70-mesh silica sand 20-40 mean silica sand •8 protective casing I 1 Neat cement 4 stainless blank •83 • «i 4 stainless screen 15 slot 7D-I05 EarthFccx Enaineenna; Inc EarthFax PROJECT NO c-20 U HERCULES BACCHUS WORKS WELL GW-29 TOP or CASING CLEV A 819.22 GROUND SURFACE ELEV 4 8I6J7 STRATIGRAPHIC LOG GW-29 0'-50' Gravelly sand 50% sand, 40% gravel, 10% silt Sand is very fire to coarse grained Gravel is 1/4", subangular to subrounced, 50% quartzite, 50% igneous Pale brown (IOYR 5/3) 50'-55' Gravelly sand 60% sand, 40% gravel Sand is medium grained Gravel ranges from 1/4" to 1/2* , subrounded to rounded, quartzite Pale brown (10YR 6/3) 55'-66' Gravelly sand 70% sand, 20% gravel, 10% silt Sand is medium grained Grave 1 is quartzite Brown (10YR 5/3) 66'-75' Silty sands tone Sand is medium grained with <5% coarse grains Brown (IOYR 5/3) 75 1 - 80 1 Silty sandstone as above but silt is vitnc ash Light brownish gray (2 5Y 6/2) 80'-90' Silty sandstone as above but Dale brown (10YR 6/3) 90-105 Silty sand Brown (10YR 5/3) GEOLOGIC LOG o o _) u X o. < cr DESCRIPTION WELL CONSTRUCTION DETAILS - 20 - 40 - 60 - 80 - IOO - 120 - 140 -160 - 180 - 20O 3m Ob Oh Sandy gravel Silly sand Gravelly sand Silty sand Concrete pad 8 proleclive casing 4 galv blank 1 70-mesh silica sand 20-40 mesh silica sand I i Neat cement 174 I7C 4" stainless plonk - 4 stainless screen IS slot -20r 2tr TD-212 =^= Earth-Fax Engixieenrig Inc • • EarthFax PROJECT NO c-20 V HERCULES BACCHUS WORKS WELL GW-30 TOP OF C AS [HG ELEV - 466288 GROUND SURFACE ELEV 4 660.27 STRATIGRAPH IC LOG GW-3 0 0 ' - 5 ' Sandy gravel 50% gravel, 35% sand, 15% silt Gravel ranges from 1/4" to 2", subrounded to suoangular, quartzite Sand is very fine to coarse grained Very dark grayish brown (IOYR 3/2) 5'-20' Silty sand 70% sand, 20% silt, 10% gravel Sand is very fine to very coarse grained Gravel ranges from 1/4" to 3/8", suoangular to subrounded, quartzite Brown (IOYR 5/3) 20'-65' Silty sand 65% sand, 25% silt, 10% clay Sand is very fine to medium grained, contains some vitnc ash Brown (10YR 5/3) 65'-80' Gravelly sand 50% sand, 35% gravel, 15% silt and clay Sand is fine to very coarse grained Cravel is quartzite Light yellowish brown (IOYR 6/4) 80'-212' Silty sand 60% sand, 30% silt, 10% gravel Sand is fine to very coarse Grave 1 is mostly quartzite with some igneous Red color increases with depth Light brownish gray (10Y.R 6/2} GEOLOGIC LOG o o X CL. < cr o DESCRIPTION WELL CONSTRUCTION DETAILS •8 protective casing Concrete pad - 20 - 40 - GO - 80 — 100 — 120 140 - IGO — 180 — 200 O o •V- o0, • o r33 "AS Q o Ob Oh Gravelly sand Gravelly sand 4 galv blank 70-mesh silica sand 8-12 mesh silica sand 2 i 2 i i •Neat cement 4 stainless Wank 4 stainless screen 15 slot •209 " acr TD=.2I0 =5^3 E art hf car Engineering Inc EarthFax PROJECT NO c-20 ^ HERCULES BACCHUS WORKS WELL GW-31 TOP OF CASING ELEV A 672 53 GROUND SURFACE ELEV 4 669 92 STRATIGRAPHIC LOG GW-31 0'-15' Gravelly sand 55% sard, 30% gravel, 15% silt Sand is coarse to fined grained Gravel ranges from 1/4" to 1/2', subangular to subrounded, auartzite and 1lmestone Brown {IOYR 5/3) 15'-100 Gravelly sand 50% sand, 30% gravel, 10% silt Sand is coarse to very fine grained Gravel is mostly quartzite, some limestone and igneous Light yellowish brown (IOYR 6/4) 100 ' -115' Gravelly sand 85% sand, 10% gravel, 5% silt Sand is very fine to very coarse Cravel is quartzite Light yellowish brown (10YR 5/4) 115,-210 Gravelly sand 50% sand, 30% gravel, 20% clay Sand is very rine to very coarse Gravel is quartzite Yellowish crown (10YR 5/4) GEOLOGIC LOG o o -I u X a. < tr o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 — 40 SO — BO 100 -120 — 140 > O ° ° 1 • o >»Cj < o • c Ob Qh Concrete pad 6 protective casing Sandy clay Gravelly sand Silty sand 4 galv blank 70-mesh silica sand — 8-12 mesh sriica sand 1 z z ^- N. 2 1 at cement •128 -30" 4 stainless blank 4 stainless screen IS slot TD-155 ^^=| EarthFccx V"Vi Engineering; Inc • • EarthFax PROJECT NO c-20 y HERCULES BACCHUS WORKS WELL GW-32 TOPOFCASIHG ELEV 461006 GROUND SURFACE ELEV A 60730 STRATIGRAPHIC LOG GW- 3 2 O'-S1 Sandy clay 40% clay, 35% sand, 25% silt Moderate to nign aiiatancy, moderate plasticity Very dark grayish brown (IOYR 3/2) 5'-15' Gravelly sand 50% sand, 30% gravel, 20% silt Sand is very fine to coarse Gravel ranges from 1/4" to 3/4", subangular to subrounded Brown (IOYR 5/3) 15'-75' Gravelly sand 50% sand, 30% gravel, 15% silt, 5% clay Sand is very fine to coarse Cravel is quartzite, limestone and igneous Yellowish brown (10YR 5/4) 75'-125' Gravelly sand 65% sand, 25% gravel, 10% silt Sand is very fine to medium grained Cravel as above Light brownish gray UOYR 6/2) 125'-155' Silty sand 55% sand, 35% silt, 10% gravel Sand ranges from fine to medium grained Brown (10YR 5/3) GEOLOGIC LOG o o _l u X a. < CE DESCRIPT ION WELL CONSTRUCTION DETAILS 1 i — 20 — CO — €0 - 80 — IOO — 120 — 140 -160 Ob Oh Gravelly sand Silty sand 8 proteclive casing Concrete pad 4 galv blank 70-mesh silica sand - 20-40 mesh silica sand 2 / ! I I Neat cement -4 stainless blank •I34 4 stainless screen IS slot .TIC T7T TD-177 EctrthJcDi Enaxneerina Ine • • EarthFax PROJECT NO c-20 M HERCULES BACCHUS WORKS WELL GW-33 TOP OF CASING ELEV 4 598 93 GROUND SURFACE ELEV 459644 STRATIGRAPHIC LOG GW-3 3 0'-5' Gravelly sand 60% sand, 25% gravel, 15% silt Sand is very fine to coarse grained Cravel ranges from 1/4" to 1/2", igneous ana quartzite, subangular to subrounded Dark brown (IOYR 3/3) 5'-180' Silty sand 55% sand, 25% silt, 20% gravel Sand is very fine to coarse grained Gravel is igneous and quartzite Light yellowish brown (IOYR 6/4) GEOLOGIC LOG o O _l o. < cc o DESCRIPTION WELL CONSTRUCTION DETAILS F 1 •i -J — 20 — 40 - GO ao too — 120 I40 —160 —180 f • 1 : Oh Gravelly sand Silty sand Concrete pad *4 4 galv Wank I 70-mesh silica sand 20-40 mesh silica sand- 8 protective cas«iq W3* 4 'A A, Neat cement 4" start*it Wank ICS* -rro- 4** stoMeis screen, 15 slot TD=!65 \\\W'-\^m EcrrtxiFcoc r^Vt Engineering; Ine EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-34 TOPOf CASINO ELEV - 45B774 GROUND SURFACE ELEV 4 585 88 STRATIGRAPHIC LOG GW-34 0'-5' Gravelly sand 50% sand, 40% gravel, 10% silt Sand is very fine to coarse grained Gravel ranges from 1/4' to 1/2", subangular to subrounded Dark brown (IOYR 3/3) 5'-135' Silty sand 65% sand, 25% silt, 10% gravel Sand is very fine to coarse Gravel is quartzite, limestone, igneous and some chert Light vellowish brown (1OYR 6/4) GEOLOGIC LOG a. UJ a o o _I o X a. < or DESCRIPTION WELL CONSTRUCTION DETAILS - 20 — 40 - SO SO IOO i o .0-°-°, 120 140 ISO t I I I Ob Oh Sandy silt Gravelly sand Silty sand Concrete pad 8 protective casing 4 galv blank i 70-mesh silica sand 8-12 mesh silica sand j >5 • Neat cement •M3 — 4 stamless Wank 87 -157 4 stainless screen, IS slot -TTT fT3 TD*I75 Earthfcn Engineering; Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-35 TOP OF CASING ELEV 4 587 40 GROUND SURFACE ELEV 4565 45 STRATIGRAPHIC LOG GW-3 5 0'-51 Sandy si 1t 45% silt, 30% sand, 25% gravel Sand is very fine to coarse Gravel ranges from 1/4' to 3/4", subangular to subrounded Dark brown (IOYR 3/3) 5*-20' Gravelly sand 45% sand, 40% gravel, 15% silt Sand is medium to coarse grained Gravel ranges from 1/4" to 3/8", subangular to subrounded, auartzite Light yellowish brown (IOYR 6/4) 20'-l75' Silty sand 50% sand, 25% silt, 25% gravel Sand is very fine to coarse Gravel is mostly quartzite, also limestone, igneous and chert Lignt yellowish brown (IOYR 6/4) GEOLOGIC LOG o o o DESCRIPTION WELL CONSTRUCTION DETAILS - 20 40 — 60 80 — IOO 1° \P - •120 —140 — 160 0,« Q 04 a . « c . o a Qb Qh Concrete pad •8" protective casing Gravelly silt Gravelly sand 4 goW blank 2 70-mesh silica sand 20-40 mesh silica sand 2 1 Neol cemeni •4 stainless blank •OS -ISd -i*cr 4 stainless screen IS slot TD»I80 EarthFax f^\*] Engineering Inc EarthFax PROJECT NO c-20 frf HERCULES BACCHUS WORKS WELL GW-36 TOP OF CASING ELEV 4 583 91 GROUND 5URFACE ELEV 4 58165 STRATIGRAPHIC LOG GVi-36 0'-l5' Gravelly silt 50% silt, 35% gravel, 10% sand, 5% clay Sand is medium to coarse grained Cravel is 1/4", subrounded to subangular, quartzite Brown (IOYR 5/3) 15'-180' Gravelly sand 50% sana, 25% gravel, 15% silt, 10% clay Sand is very fine to coarse grained Gravel is quartzite, limestone ana igneous GEOLOGIC LOG o X < tr o DESCRfPT ION WELL CONSTRUCTION DETAILS — 10 — 20 — 30 — 40 . o O « t> Q O O o < ) « o » o ?S3 Oh Tjn Concrete pod •8 protective casing Gravelly sand Vitnc tuff 4 galv blank I 70-mes.h silica sand' 20-40 mesh silica sand t1 1 I Neat cement 4 stainless blank -23 •zr 4 stainless screen IS slot 4 stainless blank TD-45 sr'^^S EaxlhFcac T^%^ Engineering Inc • • \^^dt j EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-37 TOP OF CASING ELEV & 557 64 GROUND SURFACE ELEV 457544 STRATIGRAPHIC LOG GW-3 7 0'-35' Gravelly sand 60% sand, 30% gravel, 10% silt Sand is very fine to coarse Gravel ranges from 1/4 to 2", subangular to subrounded, mostly auartzite Some coDbles are nresent in this interval Brown (IOYR 5/3) 35'-401 Vitnc tuff Very fine grained Contains some very fine quartz grains Light brownish gray (2 5Y 6/2) d0'-45' Vitnc tuff as above out moderately devitrified Clay is bentonitic Light olive gray (5Y 6/2) GEOLOG IC LOG o o X 0. < cr DESCR I P T ION WELL CONSTRUCTION DETAILS •I . i — 10 — 20 > I 30 — 10 Qh Sandy silt Silty sand Concrete pad 8" protective casing I 4 galv blank I 70~(nesh stUca sand- 20-40 mesh silica sand 7 i i Neot cement •2T -23 W 4" sfaMess Wank 4™ stainless screen 15 slot - 44 43 TD=45 =r-3 EcrTLhJcDC r*^"V1 Engineering Inc • • EarthFax PROJECT NO c-20 •frl HERCULES BACCHUS WORKS WELL GW-38 TOP OF CASING CL£V 4 578 03 GROUNO SURFACE ELEV 4 575 39 STRATIGRAPHIC LOG GW-3 8 0'-5' Sandy silt J-0% silt, 35% sand, 25% gravel Sand is very fine to mea mm grained Cravel ranges from 1/4 to 2', suoangular to subrounded, quartzite Dark brown (IOYR 3/3) 5'-44 6' Silty sand 68% sand, 30% silt, 2% gravel Sana is very fine to very coarse Gravel is quartzite with some igneous Yellowish brown (IOYR 5/4) 44 6'-45' Silty sand 70% sand, 20% silt, 10% gravel Sand is very fine grained Crave 1 as above Light brownish gray (2 5Y 6/2) GEOLOGIC LOG O _1 X a. < cc o DESCRIPTION WELL CONSTRUCTION DETAILS — io — 20 30 4Q "50 P-c -) o h 0 u C • o 'Ho C CI 1ft- > o cc a r - \o ?® ^ A. K _ ' 1 - 1 Oh Tew Gravelly sand Sandy gravel Clayey sandstone Concrete pad 8 protective casinq 52 4 qalv blank 70-mesh silica sand 20 40 mesh silica sand 2: 2 1 Neat cement 4 stainless blank -3? -34 4 stainless screen 15 slot 33 TD=53 EarthFax Engineering Inc EarthFax PROJECT N0 c-20 y HERCULES BACCHUS WORKS WELL GW-39 TOPOFCASiHG ELEV 4 626 08 GROUNO SURFACE ELEV 4 623 14 STRATIGRAPHIC LOG GW-3 9 Gravelly sand 60% sand, 2 5% cravel, 10% silt, 5% clay Sand is very fine to coarse Gravel 1 / ^ ', subangular to subrounded, auartzite Dark brown (IOYR 3/3) Sandy gravel 65% gravel, 20% sand, 15% silt Gravel is quartzite, limestone and some igneous Pale brown (IOYR 6/3) Clayey sandstone Very fine grained Weak red (2 5YR 5721 GEOLOGIC LOG X LU o o o X 0. < cc o DESCRIPTION WELL CONSTRUCTION DETAILS 57^ 0 — 20 — 30 — 40 Oh Gravelly sand Silty sand Concrete pad 8 protective casing 4 galv blank 70-mesh silica sand 20 40 mesh silica sand — I Neat cemenl 4" stainless blank •ZZ" '24 4 stainless screen 15 slot - 43 43 TD-45 ==r^S EarthFax r^%l Engineering; Inc • • EarthFax PROJECT NO c-20 W HERCULES BACCHUS WORKS WELL GW-40 TOPOFCASING ELEV A 575 55 GROUND SURFACE E LEV 4 573 40 STRATIGRAPHIC LOG GW-dO Gravelly sand 50% sand, 40% gravel, 10% silt Sand is very fine to very coarse grained, gravel is quartzite and igneous Brown (IOYR 5/3) Silty sand 50% sand, 30% silt, 10% gravel, 10% clay Sand is very fine to very coarse Gravel is quartzite with a few igneous Strong brown (7 SYR 5/6) GEOLOGIC LOG X < o DESCRIPTION WELL CONSTRUCTION DETAILS 20 ol Cr to g- 40 -GO Oh Tew Gravelly sand Clayey siltstone Concrete pad S protective casing Sandy siltstone TD-G5 4 galv blank 2 70-mesh silica aand 20-40 mesh silica sand Neal cemenl 30 4 stainless blank 4 stainless screen 15 slot -63 63 • • EarthFax Engineering Inc EarthFax PROJECT H0 c-20 HERCULES BACCHUS WORKS WELL GW-41 TOP OF CASING ELEV 459980 GROUNO SURFACE ELEV 4 597 66 STRATIGRAPHIC LOG GW-4 1 Grave 1 ly sana 60% sand, 25% gravel, 15% silt and clay Sand is fine to very coarse Cravel is 1/4" to 1/2", angular to suoangular quartzite, limestone and igneous Brown (IOYR 5/3) Gravelly sand 60% sand, 25% gravel, 15% silt Sand is fine to verv coarse grained Gravel as above Light yellowish brown (IOYR 6/4) Clayey s11 tstone Contains some fine grained vitnc ash Redaish yellow (7 SYR 6/8) S a n a y siltstone Sand is very fine to mediur. grained Ye 1lowish brown (IOYR 5/4) GEOLOGIC LOG Q_ UJ Q O O _1 o X a. < or o DESCRIPTION WELL CONSTRUCTION DETAILS r - —10 — 20 30 40 ,0- r F > -I r - Qh TD=45 Gravelly sand Silty sand Concrete pad 8 protective casing 4 galv blank 70-mesh sidca sand 20-40 mesh silica sand 2--2C Neat cement 4 stainless blank 4 stainless screen 15 slot EoxLhFccr Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-42 TOP OF CASING ELEV 4 579 55 GROUND SURFACE ELEV - A 577.22 STRATIGRAPHIC LOG GW-^2 Gravelly sand 60% sand, 25% gravel, 15% silt Sand is very fine to coarse grained Cravel ranges f ron 1/4" to 2", subangular to subrounded, quartzite with some igneous Dark grayish Drown {IOYR 4/2} Si1ty sand 60% sand, 30% silt, 10% grave 1 Sand is fine to coarse grained Cravel is quartzite and igneous Brown {IOYR 5 / 3) Silty sand 60% sand, 30% silt, 10% gravel Sand is very fine to medium grained Gravel is quartzite Yellowish brown (10YR 5/6) GEOLOGIC LOG o X < ac o DESCRIPTION WELL CONSTRUCTION DETAILS 10 20 30 40 50 to: o Ql Ob Tjn TD=5I Sandy gravel Clayey siltstone Sandy claystone Silty sandstone Concrete pad 5 PVC Wank 70-mean silica sand 20-40 mesh silica sand 9 protective casing Neat cement Stainless reducer 4 stainless blank •2tT 30" 4 stainless screen 15 Slot EaxLhPax Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-43 TOP OF CASING ELEV A 817 39 GROUNO SURFACE ELEV 4 815 06 STRATIGRAPHIC LOG GW-43 0 0'-7 0' Sandy gravel 50% gravel, 30% sand, 10% coboles, 10% silt Gravel is subrounded to subangular quartzite Sand is meaium to coarse grained Cobbles are 3" to 12", subrounded, auartzite Silty matrix reacts strong 1y to HC1 Very dark grayish "brown 110YR 3/2) 7 0'-12 5' Sandy gravel 60% gravel, 20% sand, 10% silt, 5% cobbles, 5% clay Gravel is subrounded to subangular, quartzite and sandstone Sand is medium to coarse grained, subrounded to subangular Silt matrix reacts strongly to HCl Brown (10YR 5/3) 12 5'-35 0' Clayey siltstone Contains 15% fine to coarse grained sand, mostly quartz, scxe dark minerals Weak reaction to HCl Brown (10YR 5/3) to grayish brown (2 5Y 5/2) with depth 35 01-4 6 0' Sandy claystone Sand is oredominantly very fine grained with some very coarse grains Coarse sand fraction is subangular to subrounded quartz with some dark minerals Some sand is iron stained Moderate to weak reaction to HCl Brown (10YR 5/3) 46 0 1 - 5 1 0' _Silty sandstone Sand is very fine to coarse grained, rounded quartz Weak reaction to HCl Yellowish brown (10YR 5/4) GEOLOGIC LOG o o _l CJ X a. < cr DESCRIPTION WELL CONSTRUCTION DETAILS 20 —10 — GO 80 -—100 :> o -a w Qh Sandy gravel Sdfy sand Sandy gravel Silty sand 3 protective casing Concrete pad 70 mesh sifica sand 20-40 mesh ailrca sand -— Stainless reducer 4 stainless Wank 4 stainless screen tS slot 7D-I15 EarthFax VXI Engineerina Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW^44 TOPOf CASINO ELEV - 4 899 SS GROUND SURFACE ELEV 4 897 22 STRATIGRAPHIC LOG GW-44 0 0'-25 0' Sandy gravel 50% gravel, 25% sand increasing to 30% with aepth, 15% silt, 10% clay decreasing to 5% with depth Gravel is subrounded to subangular quartzite, sandstone, and dark limestone Sand is very fine to very coarse grained The fine to medium grained sand fraction contains up to 50% vitnc ash Silt is vitnc ash Clay is altered vitnc ash Strong reaction to HCl Brown (10YR 5/3) 25 0'-70 0' Silty sand 85% sand, 15% silt grading with depth to 55% sand, 30% gravel, 15% silt, trace of clay Sand is very fine to coarse grained (predominantly fine grained) The very fine to fine grained sand is rounded quartz Up to 30% of the interval is vitrie ash Grave 1 is subangular to subrounded quartzite with small amounts of sandstone, siltstone, andesite-latite and tuff Strong reaction to HCl Brown (10YR 5/3) 70 0'-84 0* Sandy gravel 55% gravel, 35% sand, 10% silt, grading with depth to 40% gravel, 35% sand, 15% silt, 10% clay Gravel is subrounded to subangular quartzite and sandstone, witn some andesite-latite Sand is very fine to very coarse grained (predominantly medium to very coarse) ^ The fine grained sand is rounded to subangular quartz with up to 30% rounded vitnc ash Some iron and manganese staining Clay is altered vitnc ash Strong reaction to HCl Brown (10YR 5/4), yellowish brown (10YR 5/4} 84 0'-115 0' Silty sand 65% sand, 20% silt, 10% gravel, 5% clay , with a few cobbles ana boulders Sand is very fine to very coarse grained, rounded to subangular quartz, dark minerals and vitnc ash Medium to fine grained sand contains up to 50% ash in some zones Gravel is Dredominantly quartzite, with minor amounts of sandstone, siltstone and andesite-latite Strong reaction to HC1 Light brown (10YR 6/3), brown (10YR 5/3), grayish brown (2 5Y 4/2) GEOLOGIC LOG UJ Q O O a. < o DE SCRIPT ION WELL CONSTRUCTION DETAILS 10 20 — 30 t TT Qb TD-35 Stlty sand Vitnc tuff •3" protective casing Concrete pad 70 mesh silica sand I 20-40 mesh silica sand Neat cement 4 stainless blank 4 stainless screen IS slot EarthFax Engineering; Inc r AT % 1 EarthFax PROJECT NO c-20 M HERCULES BACCHUS WORKS WELL GW-45 TOP OF CASING fLEV 4 746 SO GROUND SURFACE CLCV A 74S 95 STRATIGRAPHIC LOG GW-4S S11ty sand 50% sand, 30% grave 1 , 20% silt Sand is very fine to coarse grainea, rounded to subrounded quartz Gravel is subrounded to subangular quartzite Very dark brown (IOYR 2/2) Vitr l c tuff 5% quartzite gravel with depth Moderately to highly devitrified Larger tuff fragments are laminated Clay is randomly iron stained Strong reaction to HCl Pale olive (5Y 6/4} and white (5Y 8/2) Vitnc tuff Contains some very fine to fine grained quactz a^d chalky grains Moderately devitrified Strong reaction to HCl Pale yellow (5Y 7/3), light gray (5Y 7/2) with depth GEOLOGIC LOG o o X O-< cc o DESCRIPTION WELL CONSTRUCTION DETAILS fe_\LfL — 20 40 — SO Ob Tjn Silty gravel Vitnc tuff 8 protective casing Concrete pad 70-mesh itllca sand 20-40 mesh silica sand StarnUss reducer 4" statnless blank 4" standees screen, 15 stat TD-70 EarthPcxr Engineering; Inc EarthFax PROJECT NO c-20 ^HERCULES BACCHUS WORKS WELL GW-46 TOP OF CASING ELEV 4 099 70 GROUND SURFACE ELEV 4 697 80 STRATIGRAPHIC LOG GW-4 6 0 0'-8 0' Silty gravel 60% gravel, 20% silt, 15% sand, 5% clay Cravel is subangular to suo-rounded quartzite, sands tone and chert Sano is very fine to coarse grained, subrounded, quartz Carbonate coats on larger clasts Strong reaction to HCl Dark brown (IOYR 3/3) 8 0 1 - 70 01 Vltric tuff Drilling rates suggest alternating thin beds of tuff and clay Contains some very fine to fine grained quartz sand and dark minerals Strong reaction to HCl Pale olive (5Y 6/3) to olive gray (5Y 5/2) GEOLOG IC LOG UJ o x a. «* cr o DESCRIPTION WELL CONSTRUCTION DETAILS — 20 — 40 — so — 80 IOO —120 Q 0 q o C o~Q * < . -> O C So* I O O #99 c 0 OQ ^ ° a O Oh Tew Cobbly gravel Silty sand Sandy silt Sandy gravel Gravelly sand Silty sandstone TD-125 8 protective casing Concrete pad 5 PVC blank Senseal 70-mesh sihea sand 20-40 mesh silica sand L4 / Stainless reducer •9Z •94 4 slainless blank ' 4 stainless screen 15 slot EarthFax Engineering Ine B EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-47 TOP OF CASING ELEV 4 799.22 GROUND SURFACE euEV 4 797 39 STRATIGRAPHIC LOG GW-4 7 0 0'-22 0' CobDly gravel &0% gravel, 20% cobbles and boulders, 20% sand, 20% silt with a trace of c lay grading witn aeoth to 70% gravel, 20% sand, 10% silt with clay Gravel is rounaed to subangular quartzite, sandstone, siltstone and andesite- latite Sand is very fine to ver/ coarse grained, rounded to subangular quartz ana dark minerals Carbonate coats on larger clasts Silty matrix reacts strongly to HCl Dark grayish brown (2 5Y 4/2), brown (10YR 5/3) with depth 22 0'-26 0' Silty sand 45% sand, 45% silt, 10% clay Sand is very Fine and very coarse grainea, rounded to subangular, auartz and dark minerals Strong reaction to HCl Light vellowish Drown (10YR 6/4) 26 0 1 -41 0' Sandy silt 60% silt, 25% sand, 15% gravel, grading with depth to 40% silt, 35% gravel, 15% sand, 10% clay Sand as above Gravel is subrounded to subangular quartzite and andesite- latite, many clasts have iron ana manganese staining Strong reaction to HCl Light yellowish brown (10 YR 6/4) 41 0'-60 0' Sandy gravel 40% gravel, 30% silt, 20% sand, 10% clay, grading with depth to 40% gravel, 30% sand, 20% silt, 10% clay Gravel is suorounded tc subangular auartzite, andesite-latite, sandstone, siltstone and limestone Sand is very fine to very coarse grained, rounded to subangular quartz and dark minerals Clayey silt matrix reacts strongly to HCl Light vellowish brown (10YR 6/4), Dale brown (10YR 6/3) 60 0'-118 0' Gravelly sand 50% sand, 20% gravel, 20% silt, 10% clay Sand is very fine to very coarse grained, roundea to subangular quartz and dark minerals with some vitnc ash Gravel is subrounded to subangular quartzite, sandstone, limestone, andesite-latite and occasional tuff fragments Clayey silt matrix reacts strongly to HCl Light yellowish brown (10YR 6/3), brown (10YR 5/3} US 0'-125 0' Silty sandstone Sand is fine to medium grained, 50% angular vitnc ash and 50% rounded quartz Silt is v_tric ash Strong reaction to HCl Pale brown (10YR 6/3) GEOLOGIC LOG \3 O _1 (J X a. < cr DESCRIPTION WELL CONSTRUCTION DETAILS Concrete pad 8 protective casing — 20 •40 — 60 — 80 — IOO -120 — 140 •ISO ISO 0 %( o 0 OQ Oh Tew Sandy gravel Silly grind Sandy gravel Silly sand Sandy gravel Silty sand Vitnc tuff 5" PVC Wank Benseol 70-mesh silica sand 10-20 mesh silica sond 4 slamless blank UJ Stamless reducer -HO" •145" 4 stainless Wank 4 stainless screen 30 slol • ar •193 TD»195 EarttLFax Engineering Inc D EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-48 TOP OF CASINO ELEV - 4 729 67 GROUND SURFACE ELEV I 727 GO STRATIGRAPHIC LOG GW-4 8 0 O'-llO 0' Sandy gravel 50% gravel, 25% sand, 20% silt, 5% clay with a few boulders ana coboles Crave 1 is subrounded to angular quartzite and sandstone, some siltstone, limestone and andesite-latite Sand is very fine to very coarse grained Fine grained sand is rounded to subrounded quart2 Medium to very coarse grained sand is subrounded to subangular quartz and dark minerals Carbonate coating on many of tne larger c'asts Strong to moderate reaction to HCl Brown {IOYR 5/3) to yellowish brown (IOYR 6/4) LIO 0'-114 0' Silty sand 40% sand, 35% silt, 20% gravel, 5% clay Sand is very fine to very coarse grained, rounded to subrounded quartz ana dark minerals Gravel is subrounded to subangular quartzite, sandstone and andes11e-1 a11te Sandstone and siltstone are manganese stained Strong reaction to HCl Pale Drown (10YR 6/3) 11^ 0'-130 0' Sandy gravel same as interval 0 O'-llO 0', but pale brown (10YR 6/3} 130 0'-135 0' Silty sand 40% sand, 30% silt, 25% gravel, 5% clay Same as interval 110 0'-114 0', but contains a few calcareous nodules (medium sand sized) are oresent 135 0'-179 0' Sandy cravel Same as interval 0 O'-llO 0 , out contains a trace of vitnc asn tuff Tuff is manganese-stained Brown (10YR 5/3), light yellowisn Drown (10YR 6/J) 179 0'-18 6 0' Silty sand 40% sand, 30% silt, 25% gravel, 5% clay Same as internal 110 0 ' - 114 0', but contains some vitnc ash tuff Tuff is manganese stained Pale Drown (10YR 6/3) 186 0'-195 0 Vitnc tuff moderately devitrified Contains occasional medium sand-size calcareous nodules Strong reaction to HCl Brownish gray (2 5Y 6/2) GEOLOGIC LOG Q_ UJ a o a. < XT O DESCRIPTION WELL CONSTRUCTION DETAILS 10 o — 20 f9°oO- 40 GO ;— SO TO=95 Oh Gravelly sand Gravelly sand Sandy silt Silty sand Sand Silty sand Sand Silty sand 8 protective casing Concrete pad Benseal 70-mesh silica sand 10-20 mean silica sand Caved in - US' Stainless reducer 4 stainless blank 67" 69 -76" 4 stainless screen 30 slot -9f •93 EarthFax Engineering: Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-49 rOPOFCASIMG ELEV -1 796 82 GROUND SURFACE ELEV - 4 796 67 STRATIGRAPHIC LOG GW-4 9 0 0 ' -1.9 0' Grave lly sand 40% sand, 30% gravel, 20% silt, 10% coboles, few boulaers Sand j_s very fine to very coarse grained (predominantly coarse grained) Sand is rounded quartz and aa rK minerals Gravel and coDbles are suoangular, subrounded and rounded quartzite and sandstone Larger clasts are carbonate-coated Silt matrix reacts strongly to HCl Light brownish gray (10YR 6/2), brown (10YR 5/3) 19 0'-2 9 0 Gravelly sand as above, but ye 1lowish brown (10YR 5/4) 29 0 ' - 4 3 0' Sandy silt 45% silt, 25% sand, 20% clay, 10% gravel Sand is very fine to very coarse grained, rounded, quartz and dark minerals Gravel is predominantly subrounded to subangular with a few rounded quartzite and sand stone clasts Larger clasts are carbonate coated Strong reaction to HCl Brown (10YR 5/3), yellowish Drown (10YR 6/4) 43 0 ' - 59 0' Silty sand 35% sand, 30% silt, 20% gravel, 15% clay Sand is very fine to very coarse gramec, subrounded to subangular, auartz and dark minerals Gravel is subangular to angular quartz- ite, sandstone and andesite-latite Moderate reaction to HCl Pale brown to light yellowish -brown (10YR 6/3 to 6/4) 59 0 ' - 69 0' Silty sand 60% sand, 30% silt, 10% clay Sand is very fine to medium grainea (oredominantly very fine grained , rounded to subrounded quartz Moderate reaction to HC Pale orown (10 YR 6/3) 6 9 0 1 - 7 5 0 Sand 95% sand, 5% silt Sand is very fine to coarse grained (mostly fine grained), rounded to subrounded auartz No reaction to HCl Light ye 11owish brown (10YR 6/4) 75 0'-86 0 Silty sand Same as interval 5 9 0'-69 0', but brown (10YR 5/3) 86 0'-90 0' Sand Same as interval 69 0'-75 0', but dark brown (10YR 3/3) 90 0'-95 0' Silty sand 75% sand, 15% silt and clay, 10% gravel Sand is very fine to ver^ coarse grained (mostly medium), rounded to subrounded 50% quartz, 50% dark minerals Gravel is subrounded to angular, quartzite Weak reaction to HCl Browr (10YR 4/3) GEOLOGIC LOG o o tj X < cr o DESCRIPTION WELL CONSTRUCTION DETAILS — 10 •20 O UN =» • o 30 — AQ Oh Silty clay Sandy silt Silty sand Sandy gravel Silty sand Sand 8 protective casing Concrete pad 70-mesh silica sand 4" stainless screen IS slot 20-40 mesh silica sand T0»43 t AT EarthFax Engineering- Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-50 TOP OF CASINO ELEV 4 792 08 GROUND SURFACE ELEV 4 79048 STRATIGRAPHIC LOG GW-50 0 0'-5 0' Silty c lay 50% clay, 40% silt, 10% sand Very fine to fine grained suoangular ash shards Clay is altered vitnc ash Strong reaction to HCl Yellowish Drown (IOYR 5/4) 5 O'-IO 0' Sandy silt 55% silt, 35% sand, 10% clay Sand is fine grained, rounded quartz and vitnc ash Clay is a 1 tered vitnc ash Strong reaction to HCl Light brownish gray (2 5Y 6/2) 10 0'-14 0' Silty sand 55% sand, 40% silt, 5% clay Sand is very fine to coarse grained, rounded to suDrounded quartz and vitnc ash Silt is vitnc ash Clay is altered vitric ash Silt and clay are iron stained Strong reaction to HCl Light brownish gray (2 5Y 6/2) 14 0'-20 0' Sandy gravel 40% gravel, 30% sand, 20% silt, 10% clay Grave 1 is subrounded to subangular, mostly quartzite with some sandstone, siltstone and andesite-latite Sand is very fine to very coarse grained, rounded to subangular quartz, dark minerals, some vitric ash Silt is vitric ash Clay is altered vitric ash Fines react strongly to HCl Brown (10YR 5/3) 20 0'-29 0' _Silty sand 70% sand, 20% silt, 10% clay Sand is very fine to very coarse grained, subrounded to subangular auartz, dark minerals and some vitric ash Silt is vitric ash Clay is altered vitric ash Both silt and clay have some iron staining Strong reaction to HCl Color grades witn depth from pale brown (10YR 6/3) to light brownish gray (2 5Y 6/2) 2 9 01-4 3 01 Sand 95% sand, with minor amounts of gravel and silt Sand is very fine to coarse grained (Dredominan11y medium to fine grained) , rounded to subrounded quartz, daik minerals, and vitric ash Gravel is subrounded to subangular, mostly quartzite with siltstone, sandstone and andesite- latite Strong reaction to HCl Light yellowish orown (2 5Y 6/4) GEOLOGIC LOG X I- 0_ LU O O o X Q_ < DESCRIPTION WELL CONSTRUCTION DETAILS — 20 — 40 — SO 80 -100 •120 oo0-.0 •OO ^ 140 — 160 180 ' - d i 0 e 5 E o * 0 5<f>/< -p. Ol St Oh Tjn Sandy gravel Sandy gravel with clny Sandy gravel Gravel Sandy gravel Sandy gravel wifh silt Vitnc tuff -8 protective casing Concrete pad • 5 PVC blank 45-80 mesh silica sand 20-40 mesh silica sand I I ! 1 i r Neat cement Stainless reducer K9 • 4 slamless blank "176 • 4 slainless screen IS slol (93 -193 TD=I95 EcatriFcar. Engineering Inc EarthFax PROJECT NO c-20 M HERCULES BACCHUS WORKS WELL GW-51 TOP OF CASING ELEV 4 704 85 GROUND SURFACE ELEV 4 702 99 STRATIGRAPHIC LOG GW-51 0 0'-15 0 Sandy gravel Very dark orown (7 SYR 8/2), brown (IOYR 5/3) 15 0'-20 0' As above, with 15% clay, 50% gravel, 25% sand Dark yellowish brown {IOYR 4/4) 20 0'-65 0' Sandy grave 1 60% gravel, 30% sand, 10% clay Gravel is 90% quartzite, 10% andes11e- 1 a11te Light ye 1 low brown (10YR 6/4), pale brown {IOYR 7/4) 65 O'-llO 0' Grave 1 , with some silt and clay 80% quartzite, 5% sandstone, 5% 1lmestone, 5% andesite-latite, 5% chert Larger fragments have partial carbonate coats 110 0'-130 0' Sandy grave 1 Gravel is mostly quartzite, some limestone, andeslte-1 a11te and chert 130 0'-163 0' Sandy grave 1 as above, out contains 15-20% silt 163 0 ' -19 5 0' Vitric tuff Contains up to 10% auartz sand and silt Smooth, friable Light olive gray (5Y 6/2) GEOLOGIC LOG o o X a. < cr DESCRIPTION WELL CONSTRUCTION DETAILS — 20 — 40 — so BO — 100 — 120 140 160 — 180 — 200 — 220 — 240 — 260 o c , CD' 4 \ r _' Oh Tew Grovel and sand Silty sandstone Conalomerate Sandstone ft grave] Silty sandstone 8" protective casing Concrete pod 70-mesh silica sand- 20-40 mesh silica sand- TD=275 Stainless reducer •4 sfarnfess bitmh 4 stainless screen 15 slot EarthFax Engineering Inc EarthFax PROJECT NO c-20 fei HERCULES BACCHUS WORKS WELL GW-52 TOP OF CASINO ELEV 456982 GROUND SURFACE ELEV 4 567 84 STRATIGRAPHIC LOG GW-52 0 0 ' — L 7 0' Gravel ana sana Cravel is 90% ver% fine to fine grained quartzite (brown, white, oink, purple), 10% carbonate and andesite-latite Sand is angular to subrounded, quartz Trace of mica 17 0'-35 0' Silty sandstone Very fine grained, subrounded to well rounded quarts with 10% mafics Non- calcareous, poorly lithified Yellowish brown (10YR 5/6) 3 5 0 ' - 40 01 Conglomerate, with some silty sands tone Crave 1- size clasts dominate, light green to dark gray 1 a111e-andesIte , 5% quartzite Sandstone as above 40 0 ' - 4 5 0' As above, but contains some dark purple andesite and less than 10% sandstone 45 0'-50 0' As above, but 30% sandstone, yellowish brown 50 0'-85 0' As above, but contains 10% white sandstone, trace of white banded calclte cement present as grave 1- sized clasts Trace of quartzite 35 0'-90 0' 50% sandstone as above, 50% andesIte-1at I te grave 1, as above 90 0'-105 0' Silty sandstone Sandstone is very fine grained, similar to interval 17' to 35', but contains 2-5% mafics and 5-10% andesite-latite grave 1 105 0 ' -14 5 0' As above, but few sandstone fragments, mostly brown silty sand, trace amounts of volcanic sand and gravel, wnite carbonate, red sandstone 145 0 1 -155 0' As above, but contains 40% andesite-latite clasts, conglomeratic 155 0'-225 0 As above, with 30% a nd e s I te - 1 a t I t e , 10% white carbonate One gravel-sized clast of lithic arenite with volcanic sand grains and dolomitic cement Op to 20% wnite carbonate with deDth 225 0'-275 0' Silty sandstone, as aoove, with 1-5% each of white carbonate, volcanic, and red sandstone clasts GEOLOGIC LOG a. tu a o o -1 CJ X OL < o DESCRIPTION WELL CONSTRUCTION DETAILS — 40 60 J. c. - - IOO — 120 — 140 f — 160 '— ISO PJ^"\ Oh Tew Concrete pad Gravelly sand Clay 8 gravel Sandy gravel Conglomerate 5" PVC Wantc 45-80 mean %m\ca iond 20-40 mesh siltco sand Caved in ^ — Neat c — S protective casing ian ri- ement -Stamlees reducer 4" stainless blank •ac ICO 4" stomle»3 screen, IS slot TD.185 EarthTcrx Englneerinfj Inc EarthFax PROJECT NO C-2O M HERCULES BACCHUS WORKS WELL GW-53 TOP OF CASINO ELEV - 4 56063 GROUND SURFACE ELEV 4 559 07 STRATIGRAPHIC LOG GW-53 0 0'-45 0' Gravelly sand 35% sand, 30% gravel, 20% boulders, 10% silt, 5% clay Sand is auartz, fine grained Strong reaction to HCL Brownish yellow (IOYR 5/8) 45 0'-75 0' Gravelly sand Fewer boulders, more gravel than above Grave 1 is angular to subangular, quartzite and volcanics Brownlsh yellow (10YR 5/8) 75 0'-103 0' Clayey grave 1 Clay with gravel and cobbles Gravel is subangular to subrounded Strong reaction to HCL Brownish yellow (10YR 6/6) 103 0 1 -169 0' Sandy grave 1 with silt and clay Strong reaction to HCL Brownish yellow (10YR 6/6) 169 0 ' -18 5 0' Cong 1ome rate Quartzite and volcanic clasts in sand matrix Strong reaction to HCL Yellowish red (5 YR 4/6) GEOLOG IC LOG UJ a o _1 o X a. «c or o DESCRIPTION WELL CONSTRUCTION DETAILS — 20 — 40 — GO — SO — (OO — 120 — 140 — ieo °° O -CI a Vv •a a J0 O Oh Tew Sandy gravel Sandstone 8 siltstone Mudstone 8 silty sandstone Sandstone B siltstone Sandstone 8 gravel Gravel with 10% sandstone 1 8 protective casing Concrete pad 5 PVC Wank V if-. 45-SO mesh silica sand 10-20 mesh silica sand 1 1. I 1 I- Neat cement •Stainless reducer £30 4 stainless blank -H6- •(30* — 4 stainless screen 30 slat TD-IG5 EartliFax Engineering; Lnc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-54 TOP OF CASINO ELEV 4 556 82 GROUNO SURFACE ELCV c 555.29 STRATIGRAPHIC LOG GW-54 0O'-20 0' Sandy gravel 60% gravel, <i 0 % sand Numerous quartzite boulders, siltv zones Light brown (7 5YR 6/4) 20 0'-45 0' Sandy grave 1 50% gravel, 30% sand, 10% silt, 5% clay Light brown (7 5YR 6/4) 45 0*-60 0' Sandy grave 1 60% gravel, 20% sand, 10% silt, 10% clay, silt and clay are m stringers Light brown (7 SYR 6/4) 60 0'-95 0' Sandy grave 1 60% gravel, 30% sand, 10% silt, bouIders Very pa le brown (10YR 7/4) 95 0'-107 0' Sandy gravel , some silt (90% quartzite, 10% carbonate, trace of andesite-latite, minor amounts of silt, clay balls, with suspended sand and grave 1 107 0'-115 0' Sandstone and s11 tstone Very fine grained sand- stone, siltstone are light Drown 15% gravel, mostly auartzite with some andesite-latite 115 0'-130 0' Mudstone and silty sanastone Mudstone is light brown and reddish Drown, contains some sand grains Sandstone is very fine grained 5% quartzite gravel 130 0'-135 0' Sa nd s tone and siltstone 95% very fine grained sandstone, light brown, 5% siltstone, reddish brown Sanastone and silts tone contain 10% dark minerals Trace of latite cravel 135 0'-140 0 50% Sandstone, as above, 50% quartzlte grave 1 Trace of tuff 140 0'-l65 0' 80% Grave 1 , 10% sandstone as above, 5% andesite- latite, as above , 5~% carbonate Volcanics increase to 20% with depth GEOLOGIC LOG 0_ UJ o o o X a. < a: DESCRIPTION WELL CONSTRUCTION DETAILS — 40 — so Sandy gravel Clay 8 gravel Sandy gravel Gravelly clay Clay 8 gravel Sandy gravel Concrete pad 8 protective cosing I6-40 mesh siHca sand Stainless reducer 4 stainless Wank 4" stainless screen 15 slo I TD=75 iS4 EarthFax EcLTlhfax Engineering Inc PROJECT No C-20 HERCULES •te-^Baaaaeee-eeaaBBBBB) BACCHUS WORKS WELL GW-55 TOP OF CASINO ELEV 4694 63 GROUND SURFACE ELEV 4G93J3 STRATIGRAPHIC LOG GW-55 0 0'-30 0' Sandy gravel 55% gravel quartzite with some andesite-latite 30% sand, 5% silt Dark orown (IOYR 3/3) 30 0'-35 0' Clayey gravel 65% gravel, 20% clay, 15% sand Pale brown (10YR 6/3) 35 0'-45 0' Sandy grave I 65% gravel, 30% sand, 5% clay Yellowish brown (10YR 5/6 and 10YR 6/6) 45 0'-50 0' Gravelly clay 55% clay, 30% gravel, 15% silt, plastic, slow dilatancy Gravels are 70% quartzite, 30% andesite-latite Very pale brown (10YR ~76) 50 0'-60 0' Clayey gravel 55% gravel, 45% clay, some cobbles Pale brown (10YR 6/3) and light yellowish brown (10YR 6/4) 60 0'-70 0' Sandy grave 1 70% gravel, 25% sand, 5% silt Sand is very fine grained Pale brown (10YR 6/3) 70 0'-75 0' Sandy gravel 50% gravel, 30% sand, 20% silt Sand is very fine grained Pale brown (10YR 6/3) X a. UJ Q GEOLOGIC LOG o o -J o X < cc o DESCRIPTION WELL CONSTRUCTION DETAILS 20 4Q GO — SO "IOO — 120 o O o - O O —wo ioO (GO 0 SO?, i o o > o « 40 Qh Concrete pod Q protective casing Sandy gravel 5 PVC blank 1 45-SO mesh silica sand - — 10-20 mesh silica sand rlh 1 •2 2 2 2 Neat cement -Stainless reducer -I2fl or 4 stainless blank 4 stainless screen 15 slo I TD-1G4 S^aB Earthi'ax Engineering Inc EarthFax PROJECT NO c-20 'ni HERCULES BACCHUS WORKS WELL GW-56 TOP OF CASING ELEV 4 54924 GROUND SUftFACE ELEV 4 547 71 STRATIGRAPHIC LOG GW-56 0 0'-90 0' Sandy gravel Gravel is 95% quartzite, 5% carbonate and andesite-latite Matrix is apDrox innate ly 80% sand, 20% silt and clay Light yellowisn brown (IOYR 6/4) Occasiona1 silt and clay stringers 90 0'-l64 0' Sandy gravel, as above, but contains minor amounts of andesite-latite, tuff and sandstone GEOLOG IC LOG ex. Ul a o o X a. < or o DESCRIPTION WELL CONSTRUCTION DETAILS — 20 40 fo°oo- ho- o cr 60 — SO — 100 — 120 — 140 JO°O: «0 e O •» C a O-- -i u0 o Qh S protective casing Concrete pad Sandy gravel 45-80 mesh silica sand 10-20 mesh silica sand Caved m 4" stainless screen 30 slot TD-145 m EarthFcor. Engineering Inc EarthFax PROJECT N0 c-20 M HERCULES BACCHUS WORKS WELL GW-57 TOP Of CA9IH0 EL£V 4 539 97 GROUND SURFACE ELEV A 53875 STRATI GRAPHIC LOG GW-57 OO'-lOO1 Sanely gravel 65% gravel, 35% sand, with stringers of silt and clay, slight to no plasticity Brown (7 5YR 5/2) 10 0'-55 0' Sandy gravel 60% gravel, 30% sand, 10% silt, trace of clay Gravels are subangular to subround 90% auartzite and 10% andesite-latite Pale brown {10YR 6/3) 55 O'-llO 0' Sandy grave 1 As above, but light yellowish brown (10YR 6/4) 110 C-145 0' As above, but 55% grave), 35% sand, 10% silt GEOLOGIC LOG £L a o X a. < or DESCRIPTION WELL CONSTRUCTION DETAILS - 20 - 40 -so - so -IOO - 120 • 140 -ISO ~ ISO -200 -220 -240 -260 260 • 300 -320 re.* ' - J ° C3 3? on c 3. TD=360 Oh Concrete pad Sandy stlt —^ Sandy gravel Silty sand Sandy gravel Alternating sandy gravel silty sand and gravelly sand (see log for details) 5 PVC blank 45-SO mesh silica sand 20-40 mesh silica sand ! S protective casing 1 If i I Neat cement -Stainless reducer 4 stainless blank •a? A stainless screen 15 slot EarthFax Engineertna Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-58 TOP OF CASING ELEV - A 969 64 GROUND SURFACE ELEV 4967 78 STRATIGRAPHIC LOG GW-58 0 0'-3 0° Sandy silt 45% silt, 35% sand, 20% gravel with cobbles and boulders Sand is very fine to very coarse, rounded to subangular, quartz, with some dark minerals Gravel is subrounded to subangular, quartzite, sandstone, siltstone, with some dark minerals Strong reaction to riCL Earthy odor Dark grayish blown {IOYR 6/3) 3 O'-BO 0' Sandy gravel 50% gravel, 30% sand, 15% silt, 5% clay with cobbles and boulders Gravel is subrounded to angular quartzite, with minor dark minerals, limestone, and sandstone Sand is very fine to very coarse grained, quartz with dark minerals and occasional tuff fragments Strong reaction to HCL Brown (10YR 5/4) 80 0'-90 0' Silty sand 55% sand, 35% silt, 10% clay Sand is very fine to coarse grained, rounded to subrounded, mostly quartz, with sandstone, limestone, and dark minerals Gravel is rounded to subangular, quartzite with lesser siltstone, sandstone, with da r < minerals Sand and gravel are carbonate-coated with some iron staining Strong reaction to HCL St rong brown (7 5YR 5/6) to yellowish brown (10YR 5/4) 90 0'-200 0" Sandy gravel 50% gravel, 30% sand, 15% silt, 5% „clay , with a few cobbles and boulders Gravel is subrounded to angular, quartzite with lesser dark igneous minerals, siltstone, dolomite, and tuff fragments Sand is very fine to very coarse grained, rounded to subangular A fine grained sand lens is present from 115 0' to 117 0' Cobbles and boulders are distributed throughout interval Matrix reacts strongly to HCL Light yellowish brown (10YR 5/4) 200 0'-209 0' Silty sand 60% sand, 20% silt, 15% gravel, 5% clay Sand is very fine to coarse grained, rounded to subrounded, mostly quartz and quartzite, with dark minerals Some rounded shards of vitric ash in the sand Gravel is rounded to subangular, calcareous sandstone fragments, with lesser quartzite, limestone Silt contains some vitric ash Tuff fragments display lamlna ted bedding S trong reaction to HCL Light yellowish brown (10YR 6/4) 209 0'-219 0' Sandy silt to silty sand 50% silt, 40% sand, 5% clay, 5% gravel Grades to 50% sand, 40% silt, 5% gravel, 5% clay Silt contains a very minor GW-5 8 continued (page 2) amount of vitric ash Sand is very cine to very coarse, rounded to subrounded, quartzite, dark igneous minerals with rounded shards of vitnc ash Gravel subanqular, medium grained calcareous sandstone fragments with a silt sized matrix Matrix reacts strongly to HCL Yellowish brown { IOYR 5/6 to IOYR 6/4 ) 219 0'-225 0' Sandy gravel 40% gravel, 35% sand, 20% silt, 5% clay Gravel is subrounded to angular fragments of quartzite and tuff Sand is very fine to very coarse grained, rounded to subangular, with quartzite, and lesser amounts of siltstone and dark minerals and tuff f ragmen ts Strong reaction to HCL Pale brown (10YP 6/3} 225 0'-230 0' Silty sand 50% sand, 40% silt, 5% gravel, 5% clay Sand has occasional rounded shards of vitric ash Silt contains some vitric ash Strong reaction to HCL Light yellowish brown (10YR 6/4) 230 01-234 0' Sandy gravel 55% gravel, 35% sand, 5% silt, 5% clay Gravel is subrounded to angular, mos tly quartzite Sand is very £ ine to very coarse grained, mostly quartz and quartzite Silt contains vitric ash Matrix reacts strongly to HCL Pale brown (10YR 6/3) 234 0'-240 0' "Silty sand 50% sand, 40% silt, 5% gravel, 5% clay Sand is medium to very Eine grained A few rounded shards of vitric ash are present Tuff is manganese stained Strong reaction to HCL Pale brown (10YR 6/3) 240 01-2 6 5 0' Sandy gravel 45% gravel, 40% sand, 10% silt, 5% clay Gravel is rounded to subangular Sand is medium to very fine grained, rounded to subrounded Sand contains 30% vitric ash shards Strong reaction to HCL Pale brown (10YR 6/3 ) 265 0'-275 0' Gravelly sand 50% sand, 35% gravel, 10% silt, 5% clay Sand is medium to very fine grained, rounded to subrounded Gravel is rounded to subangular, quartzite with tuff Strong reaction to HCL Pale brown (10YR 6/3) 275 0'-279 0' Sandy gravel 45% gravel, ^0% sand, 10% silt, 5% clay Gravel is subrounded to subanqular, quartzite with tuff Sand is coarse grained, rounded to subangular, mostly quartzite with tuff Strong react ion to HCL Pale brown ( 10YR 6/3) GW-^S continued {page 3) 279 0'-285 0' Gravelly sand 60% sand, 35% gravel, 5% silt and clay Sand is very coarse grained, rounded to subangular, quartz witn tuff Gravel is sunrounded to subangular, auartzite witn aark igneous minera Is Strong reaction to HCL Pa le brown {IOYR 6/3) 285 0'-30C 0' Gravelly sand 65% sand, 20% gravel, 10% silt, 5% clay Sand is very fine to very coarse grained quartz, quartzite, and tuff Gravel is subrounded to subangular, quartzite with dark igneous minerals, and tuff Strong reaction to HCL Pale brown [10YR 6/3) 300 0 ' - 314 0' Sandy gravel 50% gravel, 40% sand, 5% silt, 5% clay Gravel is subrounded to subangular, quartzite with dark igneous material and tuff Sand is very coarse grained, rounded to subangular, mostly quartzite, dark igneous material and tuff Strong reaction to HCL Pale brown (10YR 6/3) 314 0'-320 0' Silty sand 65% sand, 20% silt, 10% gravel, 5% clay Sand is medium to coarse grained, rounded to subangular, quartz, dark igneous material and tuff Grave 1 is subrounded to subangular, mostly quartzite, dark igneous material and tuff Tuff fragments are manganese stained Strong reaction "to HCL Pale brown (10YR 6/3) 3 20 0'-333 0' Sandy grave 1 45% gravel, 40% sand, 10% silt, 5% clay Cravel is subrounded to subangular, quartzite, dark igneous material and tuff Sand is very coarse grained, rounded to subangular, mostly quartz, quartzite, dark igneous, with tuff fragments Strong reaction to HCL Pale brown (10YR 6/3) 325 0'-329 0' Gravelly sand 50% sand, 35% gravel, 10% silt, 5% clay Sand is coarse to very coarse grained, rounded to subangular, quartz, quartzite, with dark igneous minerals and tuff Gravel is subrounded to subangular, quartzite, aark igneous and tuff Strong reaction to HCL Pale brov/n (10YR 6/3) 329 0'-338 01 Sandy gravel 50% gravel, 35% sand, 10% silt, 5% clay Cravel is subrounded to subangular, quartzite, dark igneous, and tuff fragments Sand is very coarse grained, quartz, quartzite, dark GW-58 continued (page 4) igneous minerals, and tuff Strong reaction to HCL Pale brown (IOYR 6/3) 338 0'-360 0' Silty sand 60% sand, 30% silt, 10% clay, <5% gravel Sand is medium to very-fine grained, quartz and/or rounded shards of vitric ash, with tuff fragments, and a few white calcareous nodules Gravel is subangular to subrounded, quartzite, dark igneous, with tuff f ragments Strong reaction to HCL Color varies from pale brown (IOYR 6/3) to light yellowish brown (IOYR 5/4) GEOLOGIC LOG o o X a. < cr o DESCRIPTION WELL CONSTRUCTION DETAILS Gravelly silt — 20 40 — 60 — 80 — too —120 —140 7-160 —iso — 220 — 24C O O 0 'a > ° fc- o O p o p-t w - o Qh Silty sand Sandy gravel Gravelly sand Sandy gravel Silty sand Sandy gravel Concrete pad 8 protective casing Gravelly sand S PVC blank 1 Senseal • 70-mesh silica sand 10-20 mesh silica sand 4 stainless blank / f2" Neat cement -Stainless reducer .183 .LAS" 4 stainless Wank -22T — 4 stainless screen 30 slot TD-245 EarthFax EarthFax Engirieerliia Inc PROJECT No C-20 HERCULES BACCHUS WORKS WELL GW-59 TOP OF CASING ELEV - a, 907 08 GROUND SURFACE CLEV - & 905 07 STRATIGRAPHIC LOG GW-5 9 0 0'-3 0' Gravelly silt *0% silt, 30% gravel, 20% sand, 10% clay Gravel is subrounded to subangular, mostly quartzite, witn some andesite-latite, siltstone, sandstone and limestone Sand is very fine to very coarse grained, rounded to subangular quartz, with minor dark minerals Larger clasts have carbonate coatings Strong reaction to HCl Very dark gray (10YR 3/1) 3 O'-IO 0' Silty sand 35% sand, 30% silt, 30% gravel, 5% clay Sand and gravel as above Carbonate coatings on larger clasts are thinner than those above Some sand and gravel particles are iron stained Strong reaction to HCl Very dark gray (10YR 3/1) 10 0'-44 0' Sandy gravel 60% gravel, 30% sand, 10% silt, <5% clay grading with depth to 45% gravel, 35% sand, 15% silt, 5% clay Gravel is subrounded to subangular, auartzite and andesite-latite with some siltstone, sandstone and limestone Sand is very fine to very coarse grained, rounded to subangular quartz, with some dark minerals and mica Sandstone and siltstone have minor manganese staining Strong reaction to HCl Brown (7 5YR 5/4) 44 0'-60 0* .Gravelly sand 55% sand, 25% gravel, 15% silt, 5% clay Sand is very fine to very coarse grained (predominantly very coarse grained) , rounded to subangular, quartz and aark minerals Gravel is rounded to subangular quartzite, andesite-latite, limestone and some siltstone and sandstone Sandstone and siltstone fragments have minor manganese staining Strong reaction to HCl Brown (7 5YR 5/4) 60 0'-86 0' Sandy gravel 50% gravel, 30% sand, 15% silt, 5% clay Sane as interval 44 0'-60 0', but color is yellowish brown (10YR 6/4) 86 0'-95 0' Silty sand 55% sand, 30% silt, 10% gravel, 5% clay grading with depth to 45% sand, 30% gravel, 20% silt, 5% clay Sand is very fine to very coarse grained (predominantly medium to fine grainea), rounded to subrounded, quartz with dark minerals and vitric ash Cravel is subrounded to subangular, quartzite and andesite-latite, with some siltstone and sandstone Strong reaction to HCl Brown (7 5YR 5/4) GW-59 continued {page 2) 95 0'-211 0' Sandy gravel 60% gravel, 30% sand, 10% silt, 5% clay , occaslona1 cobbles and DOUlders Grave 1 ls subrounded to subangular quartzite and andesite- latite, with some siltstone and sandstone Sand is very fine to very coarse grained, roundec to subrounded, mostly quartz with some dark minerals and vitric ash, mica, and calcareous nodules (approximately 0 04" diameter) Matrix reacts strongly to HCl Yellowish brown (10YR 6/4) to brownish yellow (10YR 6/6) 211 0'-245 0' Gravelly sand 60% sand, 25% gravel, 10% silt, 5% clay Sa"ncl is very fine to very coarse grained, rounded to subangular quartz with dark minerals, mica and vitric asn Gravel as above, but sands tone is nea lura grained, poorly indurated, soft Occasional carbonate nodules (approximately 0 04' diameter) Clayey silt matrix reacts strongly to nC1 Yellowish brown (10YR 6/4) GEOLOGIC LOG X y— UJ o o o I OL CC DESCRIPTION WELL CONSTRUCTION DETAILS 8 protective catmg Concrete pad — 20 — 40 — GO - 80 -too —120 —140 — IGO —180 3 . o CYc • 20C [ J 1 ' f f so , ... ^ 1 -o _° 0° Qh Tew Sandy gravel Sandy silt Sandy gravel Silty sand Sandy gravel Silty sandstone TD-2Q2 70-fnesh silica sand 20-40 mesh silica sand Stainless reducer 4" sfataJeas btanfc 4" statnJess screen 15 slot EarthFax Englneerina Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-60 TOP OF CASINO ELEV = 4 860 97 GROUND SURFACE ELEV A 857 87 STRATIGRAPHIC LOG GW - 6 0 0 01-10 0' Sanay grave 1 65% gravel, 20% sand, 15% silt with trace of clay Gravel is subrounded to angular, quartzite, sandstone, caroonates, volcanics Moderate reaction to HCL Boulders from 21 to 7' Dark brown {IOYR 3/3) 10 0'-24 0' Sandy silt 45% silt, 30% sand, 20% gravel, 5% clay Gravel is angular to subangular Sands are quartzite, carbonate, volcanics, chert Mostly fine grained Clay present as balls Moderate reaction to HCL Yellowish brown (10YR 5/5) 24 0 ' - 75 0 Sandy gravel 65% gravel, 20% sand, 15% silt Gravel is angular to subangular, quartzite, carbonate, volcanics Sand is subangular to subrounded, fine grained, quartz Moderate reaction to HCL Pale brown (10YR 6/3) 75 0'-85 0' Silty sand 85 0'-l38 0' Sandy gravel Volcanics make up a large percentage of grave Is 138 0'-202 0' Silty sandstone with a trace of gravel Gravels contain carbonate clasts, volcanics with "phenocrysts, siltstone Reddish color GEOLOG IC LOG X O o o _J o X a. <t or o DESCRIPTION WELL CONSTRUCTION DETAILS —20 — 40 •6O — BO — IOO —120 —iAO — (GO —I BO o ••05 o D3 ta Qh Tew Sandy gravel Gravelly sand Sandy gravel Gravelly sand with 45% - 75% sand Silty sand with gravel Siltstone B sandstone Sandstone Siltstone 8 sandstone TD320I5 S protective casing Concrete pad I 5 PVC blank 70-mesh silica sand 20-40 mesh sitica sand Neat cement I ( I y: i y Neat cement r Stainless reducer 4 stainless blank • m -I7T 4 stainless screen 15 slol EarthFax Engineering Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-61 TOP OF CASING CLEV * 884 29 GROUND SURFACE ELEV 4 88179 STRATIGRAPHIC LOG GW-61 0 0'-15 0' Sandy arave 1 50% gravel, 30% sand, 15% silt, ana 5% clay Cravel is subangular to subrounded, mostly 1/4 -1" clasts 40% quartzite (white and tan), 30% andesite-latite, and 30% siltstone, sandstone, and limestone Silt and clay react strongly to HCl Yellowish brown (10YR 5/4) and pale brown (IOYR 6/3) 15 0'-25 0' Gravelly sand 45% sand, 40% gravel, 15% silt, minor clay Gravel as above Fines are terrigenous with minor amounts of vitric ash Fines react strongly to HCl Pale brown (10YR 6/3) and light yellowish brown (10YR 6/4) 25 0'-60 0' Sandy grave 1 60% gravel, 30% sand, and 10% silt Grave 1 is mostly auartzite, with andesite-latite, si 1tstone, and carbonate Boulders present at 37 to 41', and 46' Sand is mostly quartz, with carbonate and vitric ash Fines react strongly to hCl Pale brown (10YR 6/3), light yellowish brown (10YR 6/4), and brown (10YR 5/3) 60 0 ' - 70 0' Gravelly sand 45% sand, 40% gravel, and 15% silt, same as interval 15 0' to 25 0', but brown (10YR 5/3) 70 0 1 -77 0' 'Gravelly sand Same as above, but approximately 75% sand, 20% gravel, and 5% silt Carbonate coats on larger clasts Fines react moderately to hCl Brown (10YR 5/3) 77 0 ' - 80 0' Sandy silt 40% silt, 30% sand, 20% gravel, and 10% clay Sana is angular to subrounded, mostly fine to medium grained quartz and dark minerals Gravel is subangular to subrounded, mostly quartzite and limestone with minor amounts of sandstone Clay fraction is altered vitric ash and forms clay Dalls m the bailed sample Pale brown (10YR 6/3) 30 0'-ll5 0' Silty sand 75% sand, 15% silt, 7% gravel, and 3% clay Sand is subangular to suorounded, primarily very fine to fine grained 30% quartz and quartzite, 40% si 1tstone and sandstone, 15% tuff, and 15% dark minerals and carbonate, and a minor amount of medium to coarse grained sand wnich consists of lithic sandstone and tuffaceous silt- stone Grave 1 is subangular to subrounded 50% lithic sand stone, 30% sandy tuff, 10% tuffaceous siltstone, and 10% quartzite and limestone Sand- stone fragments are a poorly to moderately GW-61 continued (page 2) lLthified volcanic lithic arenite Clay balls are present in samples bailed from 77-85' and 10 5- 110' Fines react moderately to HCl Pale to very pale brown (10YR 6/3-7/3), yellowish brown (IOYR 5/4-6/4) 115 0 1 -150 0' S I I stone and sa nds tone 70% sand, 20% silt, 5% gravel, and 5% clay Gravel is light gray (2 5Y 7/2) weathered silty sandy tuff Clay is present as clay balls and consists of weathered vitric ash Interval Drobably consists of interbeds of altered vitric tuff and volcanic lithic arenite Very pale brown (IOYR 7/3-6/3) 150 0'-175 0' Sand stone 90% sand, 7% silt, and 3% gravel Sand is subangular to subrounded, Drimarily very fine to fine sand 50% quartzite and quartz, 30% vitric ash, and 20% dark minerals and med l um to coarse sand which consists o t reddish brown sandstone and siltstone, and white sandy tuff Gravel is angular to subangular, reddish brown to brown sandstone and siltstone Silt fraction contains quartz and vitric ash Very pale brown (10YR 7/3) to light gray (10YR 7/2) 175 0 1 -2 01 5' Si ltstone and sandstone As above, but approximately 85% sand, 10% silt, and 5% gravel Gravel is subangular to subrounded white vitric tuff (partially altered) and reddish brown very fine grained lLthic sandstone and siltstone The lower 6 5' of the interval contains a greater amount of siltstone than the upper 10' Pale brown (10YR 6/3), light yellowish brown (10YR 6/4), brownish yellow (10YR 6/6) GEOLOGIC LOG DESCRIPTION WELL CONSTRUCTION DETAILS - 20 — 10 60 — 80 — IOO — 120 — 140 160 ' "Jo0, 2& Ob — 180 >of«0 O o c o o _ Qh Concrete pad 8" proleclive casing Gravelly si Sandy gravel Gravelly silt 5 PVC blank Sandy gravel Benseal 4 sla nl«33 blank 40-60 mesh silica sand 20 40 mesh ilea sand- J 53 S^ " - 20 — 8" casing • Neai cemenf -L [08 W3 -Neat c*manl 157 159 -165 •4 stainless screen 15 slol - 180 185 TD 185 TV EarthFax Engineering; Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-66 TOPOrcASlMO ELEV 4 569 50 GROUND SURFACE ELEV 4 566 48 STRATIGRAPHIC LOG GW-66 0 0 * - 1 2 0 Gravelly silt 60% silt 2 5% gravel 15% sand Gravel is approx 90% quartzite with some quartz, limestone, and dolomite Gravel is subrounded to subangular Silt matrix is calcareous Dark brown (IOYR 3/3) 12 0'-65 0' Sandy gravel 60% gravel 30% sand, 10% silt Gravel is mostly quartzite, with limestone, quartz, and andesite-latite Sand is fine grained Pale brown (10YR 6/3) 65 0 1-6 7 0' Gravelly silt 40% silt, 30% gravel, with sand and some clay Gravel as above with a small amount of sandstone 67 0 ' - 185 0' Sandy gravel 40% gravel 35% sand 20-25% silt with occasional clay Gravel is mostly quartzite with andesite-1atite, limestone and sandstone Sand is fine grained Matrix is calcareous Very pale brown (10YR 7/3) GEOLOGIC LOG o o a. < DESCRIPTION WELL CONSTRUCTION DETAILS — 40 — GO — 80 —100 — 120 — 140 — IGO Concrete pad 8 protective casing Sandy silt Sandy gravel 5 PVC blank Neol cement 40-60 mesh silrca sand- 20^40 maih s I co sand 1 I Neat cement Benseal 126 •4 stainless blank •147 ' W9 fl. stanJeis screen 15 s'ol 165 F70 TD.P70 ^^2J Earthfcrx r^^l KnolneerLnc; Ine EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-67 TOP Of CA3IHQ ELEV *546.23 GROUND SURFACE CLCV 4543.26 STRATIGRAPHIC LOG GW-6 7 0 0'-10 0' Sandy silt 40% silt 35% sand 25% gravel Gravel is mostly quartzite with small amount of: quartz, limestone Gravel is angular Brown (IOYR 5/3 J 10 0'- 1 70 0' Sandy gra v e 1 Gravel is 90% quartzite, with varying amounts of limestone, andesite-latite sandstone, and quartz Matrix is approximately 70% sand 25% silt and 5% clay Very pale brown (1OYR 7/3) G EOLOG IC LOG o o o a -< OL to DESCRIPTION WELL CONSTRUCTION DETAILS Concrvt* p«4 — 20 — 40 — 60 — so DM * 1 - ° r-P o — IOO 120 O1 j o TO" O o Qb Qh Sandy Silt Sandy Gravel I 5" PVC Wank N«at c«m«frl 40-60 n«sh sillcc aand - 20 40 mean a.llca aond - 8" proUctfv* ca*iog N«at c*>m«nl (6* 6*ns«d sr 4" »taW«f* Wan*. K36 JOS' 13 4" jJaWeu •cr#*n. !5 aJol - £28 7D-J32 sp7^ EczfLtiFccx FL^Vl Enalneerino Inc EarthFax PROJECT NO c-20 HERCULES BACCHUS WORKS WELL GW-68 TOPOr CA3IH0 ELEV • 4}fi(X&a GROUND SUnrACE ELCV 4 439 72 STRATIGRAPHIC LOG GW-68 0 0'-12 0' Sandy silt 50% silt, 20% sand 10% gravel, also cobbles and boulders Gravel is rounded, quartzite quartz and limestone Matrix is calcareous Dark brown to brown (10YR 4/3 to 3/3 ) 12 0'- 1 3 0 0' Sandy gravel 60% gravel, 25% sand 15% silt with cobbles and boulders to 60 Gravel consists mostly of quartzite, with some limestone, quartz andesite-latite sandstone Matrix is calcareous Pale brown (10YR 6/3) GEOLOGIC LOG o o DESCRIPTION WELL CONSTRUCTION DETAILS 20 40 •GO 80 —100 •120 -140 — IGO •ISO 1Qa 'At?' I^^I —20C i «- o.\ 5V SO. 2& L r I «|t> Ob Qh Silty Gravel Sandy Gravel Clayey Gravel Gravelly Clay " Gi I Sandy Grovel Silty Clay Silly Grovel Sandy Gravel Silty Gravel Gravelly Silt Silty Gravel Concrete pad 8" protective casing V 5 PVC blank 4 stainless blank - 40-GO mesh sfflca sane 20-40 mesh s'llca sane 3 IS if Neat Cement Benseal -(62 i < Neoi Cement f7B - 1ST — 4 stainless screen IS slot 202" 2or TD 207 EaxtiiFax \ Englneertncj Lnc • • EarthFax PROJECT NO c-20 W HERCULES BACCHUS WORKS WELL GW-69 TOPOr CA31HQ ELEV 4 693 75 GROUND SURFACE ELEV •* 690J37 STRATIGRAPHIC LOG GW-69 0 0 ' - 1 5 0 ' Silty gravel 6 0% gravel, 30% silt 10% sand Gravel is 90% quartzite with some limestone and quartz Gravel is subround to subangular Brown ( 10 YR 3/3 ) 15 0'-45 01 Sandy gravel 65% gravel 25% sand 10% silt, with some cobbles and boulders Sand is Cine grained Pale brown (10YR 6/3) 45 0'-50 0' Clayey gravel 50% gravel, 40% clay, 10% silt B rown ( 10 YR 5/3 ) 50 0 1 - 55 0" Gravelly clay 55% clay, 30% gravel 15% silt Yellowish brown ( 1 0YR 5/4) 55 0'-60 0' Sandy gravel 60% gravel, 25% sand, 15% silt Gravel is subrounded to angular quartzite, limestone sandstone and andesite Sand is fine grained Yellowish brown (10YR 6/6} 60 0 ' - 71 0 Silty clay 60% clay, 25% silt, 15% gravel Yellowish brown (10YR 5/4) 71 0 ' - 7 5 0' Silty gravel 60% gravel, 20% silt, 20% sand Pale brown (10YR 6/3) 75 0'-140 0' Sandy gravel Gravel consists of approximately "90% quartzite, with some quartz, andesite-latite and sandstone Gravel is subangular Sand is predominantly fine grained Yellowish brown (10YR 6/4 ) 140 0'-175 0' Silty gravel 50% gravel, 30% silt 20% sand Gravel as above Yellowish brown (10YR 6/4) 1 75 0'-"l90 0' Gravelly silt 45% silt, 30% gravel, 25% sand Yellowish brown (10YR 6/4) 190 0'-207 0' Silty gravel 60% gravel, 25% silt, 15% sand Gravel is quartzite, sandstone and andesite- latite Yellowish brown (10YR 6/4) GEOLOGIC LOG COMPLETION DETAILS 100. 250. 300. 350 400. DESCRIPTION O-MCr SANDY ORAVEL 3AND (3 PREDOMINANTLY VERY FINE TD FINE GRAINED GRAVE- IS SUBANGULAR TO ANGULAR OCCASIONAL COBBLES AND BOULDERS. BROWN TO PALE BROWN TO UQKT YELLOWISH BROWN. 200-KW SAND, FINE TO MEDIUM GRAINED GRAYISH BROWH. ^ 206-22S" SANDY GRAVEL SOME SILT SAND VERY FINE TO VERY COARSE GRAINED PALE BROWN. SANDSTONE. FINE TO MEDIUM GRAINED PALE BROWN TO DARK YELLOWISH BROWN TO STRONG BROWN. 2AO-2AS CLAYEY SANDY GRAVEL BROWN. 2*6-260- SAND REDDISH YELLOW 3 <• 0o^jf. 203 2TCT Ck o . —— 5 r\«of 2S0-2W CLAY LIGHT YELLOWISH BROWN WITH STREAKS OF LIGHT GRAY S.ANDY GRAVEL. PALE BROWN. SAND T'AJ.E baOvJH 27 3-3 Off SANDY GRAVEL SAND IS VERY FINE TO VERY COARSE GRAINED. VERY PALE BROWN. 100-320 SAND. ALTERNATING LAYERS OF FINE TO MEDIUM QRAINET) AND FINE TO VERY COARSE GRAINED LIGHT GRAY CLAY LAYER (< 1 ) AT 3MT 320-333" GRAVELLY SAND FINE To VERY COARSE GRAINED SAND BROWN TO BROWNISH YELLOW CLAY LAYER (< I ) AT 325" 336-36(7 SANDSTONE VERY FINE TD COARSE GRAINED BROWN. TOP OF SALT LAKE GROUP (CAMP WILLIAMS UNIT) ELEVATION AT TOP OF CASING 4553 49 LOCKING Well CAP 7~ CONCRETE y SURFACE ' PROTECTION PAD 5- PVC BLANK SCHEDULE 00 TO UT \ STATIC WATER LEVEL - W7 88" WATER - 182" 318 STAINLESS BLANK CT37 2071 * IS SLOT 318 STAINLESS _ STEEL SCREEN £207-0IT3 6-INCH STEEL SURFACE \ CASING TO AC NEAT CEMENT GROUT H" DRILL HOLE BENTON ITE y GROUT TO MESH SILICA SAND 20-*0 MESH . SIUCA SANO C2ao-3tn BENTONITE GROUT ' (3T2 36C0 TD" 36CT EarthFax Englneerlna. Inc. HERCULES INCORPORATED BACCHUS WORKS MONITORING WELL GW-70 STRATIGRAPHIC LOG GW-70 Sandy gravel Sand matrix contains silt and minor clay Silt and clay stringers present locally Boulders and cobbles also present locally Gravel is quartzite with some sandstone and andesite- latite Sand is predominantly very fine to fine grained Clay layers (less than 11 thick) at 162 1 and 173' Brown, pale brown, light yellowish brown (IOYR 5/3, 6/3, 6/4) Sand Fine to medium grained Very slow drilling rate Grayish brown (IOYR 5/2) Sandy gravel Same as interval 01-200 1 pale brown (IOYR 6/3) Sandstone Fine to medium grained Soft, easily broken with fingernail Rapid drilling rate Clay and gravel present locally Gravel layer 235 ' - 2 3 6' Pale brown, dark yellowish brown, strong brown (IOYR 4/2, 4/4, 7 5YR 4/6) Clayey sandy gravel Sand is mostly fine grained Gravel is quartzite Brown (7 5YR 5/4) Sand_ Some clay Sand is fine to medium grained Some coarse grained sand and fine gravel Reddish yellow (7 5YR 6/6) Clay Sand, sandstone and gravel layers present locally Clay is dense and dry when broken Light yellowish brown with streaks of light gray (IOYR 6/4 5Y 7/2) Sandy gravel Some clay Sand is mostly medium to coarse grained Gravel is quartzite Pale brown (IOYR 6/3) Sand Fine to medium grained, some coarse grained Slow drilling rate Pale brown (IOYR 6/3) Sandy gravel Clay stringers throughout Sand mostly medium to coarse grained Gravel is quartzite Very pale brown (IOYR 7/3) STRATIGRAPHIC LOG (cont ) GW-70 Sand Alternating layers of fine to riedium grained and medium to coarse grained Light brownish gray (IOYR 6/2) Clay layer (less than 1 1 ) at 3161 light gray (IOYR 7/2) Gravelly sand Sand is mostly medium to coarse grained Gravel is quartzite with increasing sandstone with depth Brown to brownish yellow (IOYR 5/3, 6/6) Clay layer (less than l1 thick) at 325* Yellowish red (5YR 5/8) Sandstone Very fine to fine grained Soft, rapid drilling rate Brown (IOYR 4/3) GEOLOGIC LOG COMPLETION DETAILS v ^ 0 o ( 25 50 75 100 125. 150. T75. 200. C c Ci o- cT 7? w ^ — - HP DESCRIPTION SANDY GRAVEL OAND MATRIX CONTAINS SILT AND MINOR CLAY SAND IS MOSTLY VERY FINE TO FINE GRAINED. LIGHT YELLOWISH BROWN TO PALE BROWN. C3-0T SILTY SAND SOME GRAVEL SAND IS MOSTLY VERY FINE GRAINED VTTRIC ASK GRAVEL CONTAINS 60 % VOLCANIC ROCK FRAGMENTS. LIGHT GRAY 07-125- SAND AND SANDSTONE. VERY FINE GRAINED TRACES OF VOLCANIC AND UGHT COLORED LIMESTONE GRAVELS. GRAYISH SHOWN. T25-T35" SILTY CLAYEY SAND VERY FINE TO FINE GRAINED W/SILTSONES 1 MUDSTONE5. BROWNISH GRAY T36-1B0- SAND AND SANDSTONE. TRACES OF VOLCANIC AND UGHT COLORED LIMESTONE GRAVELS. SAND AND SANDSTONE IS VERY FINE GRAINED BROWN. PALE BROWN. LIGHT YELLOWISH BROWN «o-T7T GRAVEL ANDESJTE LATHE. GRAYISH BROWN. TT3 WO1 SAND. VOLCANIC ROCK FRAGMENTS. BROWN. naO-185" SAND SOME 5ILT GRAYISH SHOWN. lfl&-iyff SITLY SAND ANQ SILTSTONE. UGHT BROWNISH GRAY 100-105 SILTSTONE. OLIVE ELEVATION AT TOP OF CASING 4706 54 LOCKING WELL CAP CONCRETE 1 SURFACE ' PROTECTION PAD 5" PVC BLANK SCHEDULE B0 TO lBtT -4 3W STAINLESI STEEL BLANK (160-18171 STATIC WATER LEVEL ICC D B-INCH . STE_ SURFACE \ CASING TO BENTONITE / OROUT NEAT CEMENT GROUT r DRILL HOLE * IS SLOT 3ifl STAINLESS STEEL SCREEN (UO-lQST TD 195 EarthFax Engmeerlna [nc HERCULES INCORPORATED BACCHUS WORKS MONITORING WELL GW-71 STRATIGRAPHIC LOG GW-7 L Sandy gravel Sand matrix contains silt and minor clay Boulders, cobbles, and clay stringers present locally Gravel is quartzite with some sandstone and andesite-latite Sand is mostly very fine to fine grained Light yellowish brown to pale brown (IOYR 6/4,6/3) Silty sand Some gravel Sand is mostly very fine grained Fine grained sand is vitric ash Coarse grained sand and fine gravel consists of approximately 5 0% quartzite and 5 0% volcanic (andesite-latite/vitric tuff) lithic fragments Light gray (IOYR 7/2) Sand and sandstone Silty clay layers present locally Traces of volcanic and 1lght colored limestone gravels Sand and sandstone is very fine grained Grayish brown (IOYR 5/2) Silty clayey sand, with siltstones and mudstones Traces of andesite-latite gravel Sand is very fine to fine grained Brownish gray (IOYR 6/2) Sand and sandstone Same as interval 971-1251 Brown, pale brown, light yellowish brown (IOYR 5/3, 6/3, 6/4) Gravel Andesite-latite Very slow drilling rate Drilling fluid partially lost to gravel interval Grayish brown (IOYR 5/2) Sand Some clay Hard, light colored gravel sized siltstone fragments present locally Sand is very coarse grained volcanic (andesite-latite) lithic fragments Brown (IOYR 5/3) Sand Some silt Increasing amounts of hard, light colored, gravel sized siltstone fragments Sand is mostly very fine grained Very coarse grained sand consists of volcanic (andesite-latite) lithic fragments Grayish brown (IOYR 5/2) Silty sand and siltstone Sand is very fine grained light brownish gray (IOYR 6/2) Siltstone Silt and very fine grained sand stringers present locally Olive (5Y 5/3) G EOLOGIC LOG DESCRIPTION WELL CONSTRUCTION DETAILS 0 20 -r 10 60 80 - 100 - 120 - MO - 160 - 180 - " 200 - " 220 *- 2-JO - . 260 -i* 200 300 - " 320 - 3J0 1 360 - 380 - . •~OQ- •120 Clayey oilt occanional coarse gravel Very pale brown (IOYR 7/3 > send Sandy gravel qu«rt:ite limestone claoco predominantly anquUr (probably cobblc-aizo 3nd larger claaco in cuttings broken by Pit J Clayey • I 11 and fine sand matrix Very pale brown (IOYR 7/3} water Iirnt encountered at 12 S boiow q rou nd 1c vc 1 ,5*nd mtdlum-co.rne grained predominant 1y quarts graino «ooie iandatonc fragmentn •5andy gravel to above Contatno 20\ jndcpLtc-licl c clanLD AndcoLtc-latJtc gravcl-si.cd cUsta are anqular probably poorLj-cemented fonq loTicr a te broken by bit Occasional Kandatone/EL 11a tone reddish brown Sanplcs rnnqe _fron 60 - 901 andes i to- 1 it ite 10 - 30* aanduLonc Trace de ltrified tuf very dark grayish brown (IOYR 3/2) T D - 422 below ground level Q-01-91 E^OS ECLTttlfCLX f^\\ EnoineerLncj Inc EarthFax PROJECT NO c-20 1,1 HERCULES BACCHUS WORKS G W - 7 2 TOP or CA0INO ELEV 4376 91 CJROUNO SUflfACE CLtV 4374 GEOLOGIC LOG COMPLETION DETAILS 30 60 120 150 710. '0. DESCRIPTION 0 y TOP SOIL WITH HOULCETta DARK BROWN. 2 103" SANDY GRAVEL WITH SILI" UINOR CLAY LOCALLY COBBLES AND BOULDERS PRESENT AT 2 3" ANO 21 BROWN: HARKERS ALLUVIUM. 103 UA SILTY SAHO WITH MINOR CLAY ANU GRAVEL BRCWN- TRACE OF SILTSTONE AND VERY FINE-GRAINED 3ANDSTOVE. 13-< ITIO- SILTY CLAY REDDISH flROwn ".IO UK SILTY SANO COARSE-OPAINEO- BROWH. Ufl 20r GRAVELLY SAND WITH MINOR SILT AND CLAY COARSE-GRAINED- BROWN TO PALE BROWN. -00 TV* CLAY LIGHT YELLOW Tu 2-V SILTSTONE AND V£F1Y FINE-GRAINED SILTY SANDSTONE BROWN CAMP WILLIAMS UNIT ELEVATION AT TOP OF STEEL CASINO. AEO^T LOCKING WEI CAP CONCRETE / SURFACE / PROTECTION PAD 3 PVC BLANK SCHEDULE 00 A 310 STAINLESS BLANK _ STATIC WATER LEVEL WSJ re/a/so — FIRST WATER AT rCT A 15 SLOT 310 STAINLESS STEEL SCREEN (110 13T) r DRILL HOLE i2c TO ier ABANDONED r PERFORATED CASING FROM TO 187 0 OHILL HOLE iar TO 22U B INCH V STEEL SURFACE \ CASINO MEAT CEWEKT QROUT . XT DRILL HOLE TO 1-3 TO MESH SILICA SAND • HD6 TTT) u£5H . SlUCA SAND [TTt 137) TO MESH SlUCA SAND CO.3 13ffl CEMENT GROUT 2t0_ EarthFax Engineenng Inc. HERCULES INCORPORATED BACCHUS WORKS MONITORING WELL GW-73 GEOLOGIC LOG COMPLETION DETAILS 30 60 90 -° °o* °° A eft 120 3 150 18D_ 210. o *M o.Q.oi 0 *0 0. cP o -0 DESCRIPTION JU SANDY GRAV El. WITH 51LT" MINOR CLAY LCC ALLY- CLAY LAYERS PRESENT AT 31 3ff W tff AND 213 2vt LIGHT BROWN TO REDDISH BROWN; HARKERS ALLUVIUM. ELEVATION AT TCP OF STEEL CASINO. 4H??,W LOCKING WEI CAP 8 INCH v S~E-L SURFACE \ CASING 225" 5AN0STONE tVF) AND SILTSTONE. 10 TO 30 % CRAVEL GRAVEL IS APPROXIMATELY 30* <GNEOU3 ROCK ANO 0O» OUARTZTTE FRAGMET5 BROWN- CAMO WILLIAMS UNIT <SJ 31LTSTCNE AND SANDSTONE (VR 3AND FRACTION CONTAINS NUMEROUS IRON/MAGNESIUM MINERALS; BROWN. COvCRETT£ SURFACE PROTECTION PAD 1 PVC BLANK SCHEDULE 80 B- DRILL HOLE 130 TO 2ACT « 310 S'AINLE* BLANK STATIC WATER LEVEL 177J tz/rj/so — FIRST WATEII AT IOO" A M 3LOT 313 3TAINLC33 STEEL SCREEN (wo 20T) ABANDONED 5" PERFORATED CASING FROM -07 TO ~CT AOANDONED PERFORATOR A I BASE OF DRILL HOLE TO MESH SILICA SAND (T77 1301 2O-40 MESH SlUCA SAND (ioo ron ro MESH ' SILICA uAHD LJtn ioo EarthFax Engineering Inc. HERCULES INCORPORATED BACCHUS WORKS MONITORING WELL GW-74 GEOLOGIC LOG COMPLETION DETAILS 60 i 100 120. DESCRIPTION 5" SILTY SAND TOPSOIL WITH CRAVEL ANO BOULDERS MINOR CLAY- OARK BROWH. 3A CLAYEY SILT WITH SAND AND GRAVEL. MEDIUM BROWN. DARK REDDISH BROWN. ANO BROWN. HARKEH3 ALLUVIUM 00 TUTACEOUS SILTY 3A NO STONE fVP> 6 TO 10 % GRAVEL. GRAVEL CONSISTS OF IGNEOUS ROCK FRAGMENTS ANO WHITE MICflmC LIMESTONE UGHT BROWN AND BROWNISH GRAY CAMP WILLIAMS UNIT ftO 76" 5ANOY 8IL1 STONE BROWN. 75 «3- SILTY SANDSTONE (VO WITH 10 TO OX GRA VCL. GRAVEL CONSIS-S OF IGNEOUS ROCK FRAGMENTS 105 OT MUDSTONE; MINOR 5ANO FROM M TO 12V QAEE.N13H ORAY ELEVATION AT TOP OF S"EL CASING: A~70 6r LCCKJNG WE — CAP CONCRETE SURFACE PROTECTION PAD 3" PVC BLANK SCHEDULE BO TO TS" 313 STAINLESS BLANK (73 051 STATIC WATER LEVEL - 12/11/90 FIRST WATER AT WT * IS 3LOT 310 STAINLESS STEEL SCREEN (oo-ran OJNCH 3TF-L SURPACc CASINO 70 MESH SlUCA SANO (SO 901 20-LO MESH SILICA SAND 180-1201 MO. 160. EarthFax Engineenna Inc. HERCULES INCORPORATED BACCHUS WORKS MONITORING WELL GW-75 GEOLOG IC LOG LU o DESCRIPTION WELL CONSTRUCTION DETAILS 50 - 100 — oO o n bo * > a •ft 1? o 200 — 250 — •300 — 350 - 400 430 ^1 4 Sand Silt and Gravel undifferentiated stratified thin bads randomly distributed boulders limestone quartzite and volcanic clasts clasts ore angular (from drill tool) original surfaces are round subround clasts era mufti colored drill slurry is brown (IOYR 5/3) October 14 1932 static water level Sand fine medium grained moderately sorted angular subangular limestone quartzite and volcanic clasts clasts ore multi colored drill slurry is brown {IOYR 5/3) Gravel silty to clayey matrix quartzite and calcareous clasts clest size up to 3/8 clasts ere multi colored drill slurry is brown (IOYR 5/3) Conglomerate weak non-calcsreoua cement andosite latito clasts angular oxidized hydro thermally altered cement on original surfaces clasts have strong purple hue drill slurry is dark reddish gray (1 OR 3/1) 4-mch stainless steel casing S Ity clay and Send gray 15Y 5/2) fine very fine grained olive Sand fine very fine grained volcenic composition fed and black grams very dark grayish brown (10YR3/2) Clay stiff gray (IOYR 6/1) Sand medium-fine grained volcanic composition red and black grams [IOYR 3/2) Vitnc tuff angular cutungs reddish white dnll slurry with glassy sherds multi colored cleats dark reddish grey (5YR 4/2) T D = 430 below ground level 4-inch 0 010 slot stainless steel screen Benseal 70 mesh silica sand 20/40 mesh silica sand filter pack 70 mesh silica sand cushion Neat cement m EarthFax ECLTLLLFCLT Enc/ineerinrj Ine PROJECT No C 20 36 HERCULES BACCHUS WORKS GW-76 TOPOF CASIHQ ELEV " 4451 65 GROUND SURFACE ELEV 4-152 FIGURE 1 GEOLOGIC LOG AND WELL CONSTRUCTION DETAILS Appendix B 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 monitoring 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 assessmeni from the worksheets to the regulations using 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 Re\iew of Relevant Documents 1 \Vhai documents were obtained pnor to conducting the inspection a RCRA Pan A permit application9 b RCRA Part B permit application' c Correspondence between the owner/operator and appropriate agencies or ciuzen's groups7 d Previously conducted facility inspection reports7 e Facility s contractor reports9 Y g The facility s Sampling and Analysis Plan9 h Ground-water Assessment Program Outline (or Plan if thefacility is in assessment monitoring)9 1 Other (specify) OWPE A 1 9950 2 B Evaluation of the Owner/Operator's Hydrogeologic Assessment i Did the owner/operator use the following direct lechniques in ihe hvdroeenlogic assessment Y/N a Logs of the soil borings/rock conngs (documented by a professional geologist son lentist or geotechnical engineer)9 b Matenals tests (e g grain size analyses standard penetranon tests etc)9 1 c Piezometer installation for water level mcasurments at different depths9d Slug tests9 e Pump tests9 . Geocherrucal analyses of soil samples9 ± g Other (specify) (e g hydrochemical diagrams and wash analysis) 2 Did the owner/operator use the following indirect technique to supplement direct techniques data a Geophysical well logs9 b Tracer studies9 hi c Resisnvity and/or electromagnetic conductance9 ^1 d Seismic Survey9 e Hydraulic conducuvity measurements of cores9 f Aenal photography9 g Ground penetrating radar9 h Other (specify) 3 Did the owner/operaior document and present the raw data from the site hydrogeologic assessment9 4 Did the owner/operator document methods (cntena) used to correlate and analyze the information9 5 The owner/operator prepare the following a Narrative desenpuon of geology9 b Geologic cross sections9 c Geologic and sou maps9 d Bonng/conng logs9 e Structure contour maps of the differing water bearing zones and confining layer9 f Narrative descnption and calculation of ground-water flows9 y OWPE A 2 9950 2 g Water table/potennomemc map9 h Hydrologic cross sections9 6 Did the owner/operator obtain a regional map of the areT and dcbneate the facility9 If yes does this map illustrate a SurficiaJ geology features9 b Streams rivers, lakes or wetlands near the facility9 c Discharging or recharging wells near the facility9 7 Did the owner/operator obtajn a regional hydrogeologic map9 If yes does this hydrogeologic map indicate a Major areas of recharge/discharge9 b Regional ground-water flow direction9 c Potentiometnc contours which are consistent with observed water level elevations9 8 Did the owner/operator prepare a facility site map9 If yes does the site map show a Regulated units of the facility (e g landfill areas impoundments)9 b Any seeps springs streams ponds, or wetlands9 c Loc_ on of monitoring wells soil bonngs or test pits9 3^ d How many regulated units does the facility have9 If more than one regulated unit then Does the waste management area encompass all regulated units9 Is a waste management area delineated for each regulated unit9 C Characterization of Subsurface GeoJogy of Site 1 Soil bonng/test pit program a Were the soil bonngs/cest pus performed under thosupervision of a quaJified professional9 b Did the owner/operator provide documentation for selecting the spacing for borings9 c Were the bonngs drilled to the deDth of the first confining unit below the uppermost zone of saturation or ten feet into bedrock9 d Indicate the method(s) of drilling OWPE A 3 9950 2 Auger (hollow or solid stem) Mud rotary Reverse rotary Cable tool Jetting Other (specify) Y/N e Were continuous sample conngs taken7 f How were the samples obtained (checked method[s]) • Split spoon X Shelby tube, or similar Rock coring Ditch sampling Other (explain) g Were the cononuous sample conngs logged by a qualified professional in geology7 1 h Does the field bonng log include the following information * Hole name/number7 1 Date started and finished7 ± Driller s ame7 Hole location (i e , map and elevation)7 .1 Dnll ng type and bit/auger size7 Gross petrography (e g rock type) of each geologic unit7 Gross mineralogy of each geologic unit7 Gross structural interpretation of each geologic unit and structural features (eg fractures gouge matenal solution channels buned streams or valleys identification of depositional matenal)7 Development of soil zones and vertical extent and descnption of soil type' 1 Depth of water bearing unit(s) and vertical extent of each ± Depth and reason for termination of borehole7 V Depth and location of any contaminant encountered in borehole7 v Sample location/number7 V Percent sample recovery7 Narrative desenpnons of —Geologic observations7 —Dnlhng observations7 2L i Were the following analytical tests performedon the core samples Mjneralogy (e g microscopic tests and x-ray diffraction)7 Perrographic analysis —degree of crystaJlinity and cementanon of matrix7 —degree of sorting size fraction (i e sieving; textural variations7 •—rock type(s)7 OWPE A 4 9950 2 —soil type9 —approximate bulk geocherrusrry Y/N V 1 existence of mjcrostrucrures that may effect or indicate fluid flow9 Falling head tests9 * Static head tests9 Settling measurements9 Centrifuge tests' Column drawings9 D Verification of Subsurface Geological Data 1 Has the owner/operator used indirect geophysical methods to supplement geological condition^ between borehole locations9 2 Do the number of bonngs and analytical data indicate that the confining layer displays a low enough permeability to impede the migration of contaminants to any stratigraphically low water bearing units9 3 Is the confining layer laterally continuous across the enure site9 A/ 4 Did the owner/operator consider the chemical compatibility of the site specific waste types and the geologic matenals of the confining layer9 5 Did the geologic assessment address or provide means for resolution of any information gaps of geologic data9 A/A 6 Do the laboratory data corroborate the field data for petrography9 7 Do the laboratory data corroborate the field data for mineralogy and subsurface geochemistry9 1 E Presentation of Geologic Data 1 Did the owner/operator present geologic cross sections of the sue9 y 2 Do cross sections a identify the types and characteristics of the geologic matenals present9 b define the contact zones between different geologic matenals9 c note the zones of high permeability or fracture9 Y d give detailed borehole information including Y OWPE A 5 9950 2 location of borehole17 Y/N _^ depth of termination7 * location of screen (if applicable)9 depth of zone(s) of saturation9 backfill procedure9 v 3 Did the owner/operator provide a topographic map which was constructed by a licensed surveyor9 V 4 Does the topographic map provide a contours at a maximum interval of two feet9 b locations and illustrations of man-made features (e g parking lots factory buildings drainage ditches storm drain pipelines etc )9 c descriptions of nearby water bodies9 "7 d descriptions of off-site wells9 e site boundaries9 f individual RCRA units9 g delineation of the waste management area(s)9 h well and bonng locations9 5 Did the owner/operator provide an aenal photograph depicting the site and adjacent off site features9 v 6 Does the photograph clearly show surface water bodies adjacent municipalities, and residences and are these clearly labelled9 Y F Identification of Ground-Water Flowpaths I Ground-water flow direction a Was the well casing height measured by a licensed surveyor to the nearest 0 01 feet9 1 b Were the well water level measurements taken within a 24 hour period9 4-c Were the well water level measurements taken to the nearest 0 01 feet9 d Were the well water levels allov-ed to stabilize after construction and development for a minimum of 2-1 hours pnor to measurements9 e Was the water WH lnfc^ia^o" obtaircd frcrn (check appropn&te unc • multiple piezometers placed in single borehole9 • vertically nested piezometers in closely spaced separate ^ • boreholes9 _/ • monitoring wells9 OWPE A 6 f Did the owner/operator provide construction details for the piezometers9 9950 2 Y/N 1 g How were the static water levels measured (check method(sj) Electric water sounder j • Wetted tape Airline • Other (explain) h Was the well water level measured in wells with equivalent screened intervals at an equivalent depth below the saturated zone9 I Has the owner/operator provided a sue water table (potennometnc) contour map9 If yes Do the potentiometnc contours appear logical and accurate based on topography and presented data9 (Consult water level data) • Are ground water flow lines indicated9 Are stanc water levels shown9 Can hydraulic gradients be esnmated9 k Do the owner/operator s flow nets include piezometer locations9 depth of screening9 Y j Did the owner/operator develop hydrologic cross secnons of the vertical flow component across the site using measurements from all wells9 jj width of screening9 measurements of water levels from all wells and piezometers9 Y 2 Seasonal and temporal fluctuations in ground water Y a Do fluctuations in static water levels occur9 If yes are the fluctuations caused by any of the following ^ —Off-site well pumping —Tidal processes or other intermittent natural variations (e g nver stage etc ) —On site well pumping —Off site on-site construction or changing land use patterns —Deep well injection —Seasonal vanations JL —Other (specify) b Has the owner/operator documented sources and patterns that contribute to or affect the ground-water patterns below the waste management9 c Do water level fluctuations alter the general ground water gradients and flow directions9 d Based on water level data, do any head differentials occur that may indicate a vertical flow component in the saturated zone9 OWPE A 7 e Did the owner/operator implement means for gauging long term effects on water movement that may result from on site or off site construction or changes in land use patterns9 9950 2 Y/N v 3 Hydraulic conductivity a How were hydraulic conductivities of the subsurface matenals determined9 Y Single well tests (slug tests)9 Multiple well tests (pump tests) Other (specify) LAtx>*-#n>M TEW*^ b If single well tests were conducted, was it done by Adding or removing a known volume of water9 Pressunzing well casing9 c If single well tests, were conducted m a highly permeable formation were pressure transducers and high-speed recording equipment used to record the rapidly changing water levels9 f Were other hydraulic conductivity properties determined9 d Since single well tests only measure hydraulic conductivity in a limited area were enough tests run to ensure a representative measure of conductivity in each hydrogeologic unit9 Y e Is the owner/operator's slug test data (if applicable) consistent with exisunj geologic information (e g bonng logs)9 g If yes provide any of the following data if available Transmissivity Storage coefficient Leakage Permeability Porosity Specific capacity Olher (specify) 1_ y 4 Identification of the uppermost aquifer a Has the extent of the uppermost saturated zone (aquifer) in the facility area been defined9 If yes Y Are soil bonng/test pit logs included9 Are geologic cross sections included9 h Is ihc^ evidence ofcc"rn rg (competent unfraciured conunuuui audio* permeability) layers beneath the site9 If ves A/ how was continuity demonstrated9 c What is hydraulic conductivity of the confining unit (if present)9 CM/Sec How was it determined9 OWPE A 8 9950 2 Y/N d Does potential for other hydraulic communication exist (e g lateral inconnnuity between geologic units facies changes fracture zones cross cutting structures or chemical corrosion/alteration of geologic units by leachage9 If yes or no what is the rationale9 fe. -ft* Iff* or1 -foe j£e Qyoirrh /Hfe <gw a//^a/ -H^t -Joe yj/ faa&S-ki/tg. Stdt+w/dc /"^/^^ a/ j&eA^t^tyk- 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 ai the facility 1 Drilling Methods a What drilling method was used for the well9 Hollow-stem auger O Solid stem auger • Mud rotary O Air rotary Q • Reverse rotary O • Cable tool SI Jetting Q Air drill w/casing hammer Q Other (specify) b Were any cutting fluids (including water) or addmves used during drilling9 If yes specify • Type of drilling fluid . Source of water used Foam Polymers, Other c Was the cutting fluid or additive identified9 d Was the drilling equipment steam cleaned pnor to drilling the well9 • Other methods 1 e Was compressed air used during drilling9 If yes, • was the air filtered to remove oil9 f Did the owner/operator document procedure for establishing the potentiometnc surface9 If yes • how was the location established9 g Formaoon samples OWPE A 9 9950 2 Were formation samples collected mitiailv during drilling9 Y/N y Were anv cores taken continuous9 If not at what interval were samples taken9 How v.ere the samples obtained9 ^Split spoon —Shelby tube —Core drill —Other (specify) Identify if any physical and/or chemical tests were performed on the formation samples (specify) 2 Monitoring Well Construction Matenals a Identify construction matenals (by number) and diameters (ED/OD) Primary Casing Secondary or outside casing (doubleconstrucnon) Screen Material Diameter b How are the sections of casing and screen connected9 • Pipe sections threaded Couplings (fncuon) with adhesive or solvent Couplings (friction) with retainer screws Other (specify) c Were the matenals steam-cleaned pnor to instaJlarion9 * If no how were the matenals cleaned9 y 3 Well Intake Design and Well Development a Was a well intake screen installed9 What is the length of the screen for the well9 A 1 Is the screen manufactured9 Tj Was a filter pack installed'' What kind of filter pack was emoloved9 -See TAftLt 4 I \ Is the filter pack compatible with formation matenals9 y How was die filter pack installed9 OWPE A 10 9950 2 Y/N What are the dimensions of the filter pack9 Has a turbidity measurement of the well water ever been made9 Have the filter pack and screen been designed for the insitu matenals9 c Well development Was the well developed9 What technique was used for well development9 -£-Surge block XBader —Air surging —Water pumping —Other (specify) __ 4 Annular Space Seals a What is the annular space in the saturated zone directlyabovc the filter pack filled with —Sodium bentonite (specify type and gnt) —Cement (specify neat or concrete) -^Other (specify) 6ee -rAT^ufc 4-1 f b Was the seal installed by —Dropping matenal down the hole and tamping -^Dropping matenal down the inside of hollow-stem auger -^Tremie pipe method —Other (specify) c Was a different seal used in the unsaturated zone9 If yes Was this seal made with9 —Sodium bentonite (specify type and gnt) —Cement (specify neat or concrete)- Other (specify) Was this seal installed by9 -^-Dropping matenal down the hole and tamping -^-Dropping matenaJ down the inside of hollow stem auger -^-Other (specify) d Is the upper portion of the borehole sealed with a concrete cap to prevent infiltration from the surface9 e Is the well fitted with an above ground protectivedevice and bumper guards9 f Has the protective cover been installed with locks io Drevent tamr>enng9 OWPE A-11 9950 2 H Evaluation of the Facility's Detection Monitoring Program 1 Placement of Downgradient Detecnon Monuonns Wells a Are the ground-water monitoring weils or clusters located irnmeuian-I - ^juccnt to the waste management area9 Y/N b How far apart are the detection monitoring v-ells9 c Does the owner/operator provide a rationale for thelocation of each monitonni well or cluster9 d Does the owner/operator identified the well screenlengths of each monitoring well or clusters9 -See T»Vftua 4 I \ e Does the owner/operator provide an explanation for the well screen lengths of each monitoring well orcluster9 f Do the actuaJ locations of monitoring wells orclusters correspond to those identified by the owner/operator9 2 Placement of Upgradient Monitoring Wells a Has the owner/operator documented the location ofeach upgradient monitoring well or cluster9 b Does the owner/operator provide an explanation fonhe location(s) of the upgradient monitoring wells9 c What length screen has the owner/operator employed inthe background monitoring well(s)9 ^ce. TIM^LE. 4- I I d Does the owner/operator provide an explanation for the screen lcngth(s) chosen9 e Does the actual location ofeach background monitoring well or cluster correspond to that identified by the owner/operator9 1 I Office E\aluation of the Facility's Assessment Monitoring Program 1 Does the assessment plan specify a The number location and depth of wells9 MA b The rationale for their placement and identify the basis that will be used to select subsequent sampling locations and depths in later assessment phases9 2 Does me nst of monitoring parameters include all hazardous waste constuuenLS from the facility9 1 OWPE A 12 a Docs the water quality parameter list include other important indicators not classified as hazardous v*aste constituents0 b Does the plan provide for a comprehensive program of investigation to fully characterize the rate and extent of contaminant migration from the facility9 d Does the plan employ a quarterly monitoring program0 9950 2 Y/N 1 b Does the owner/operator provide documentation for he listed wastes which are not included9 3 Does the owner/operator s assessment plan specify the procedures to be used to determine the rate of constituent migration in the ground water9 /OA 4 Has the owner/operator specified a schedule of implementation in the assessment plan9 5 Have the assessment monitoring objectives been clearly defined in the assessment plan9 a Does the plan include analysis and/or re evaluation to determine if significant contamination has occurredin any of the detection monitoring wells9 AJ AT v c Does the plan call for determining the concentrations of hazardous wastes and hazardous waste constituentsin the ground water9 6 Does the assessment plan identify the investigatory methods that will be used in the assessment phase9 v a Is the role of each method in the evaluation fully described9 b Does the plan provide sufficient descriptions of the direct methods to be used9 c Does the plan provide sufficient descriptions of the indirect methods to be used9 c Are the procedures well defined9 d Will the method contribute to the further characterization of the contaminant movement9 7 Are the investigatory techniques utilized in the assessment program based on direct methods9 v a Does the assessment approach incorporate indirect methods to further support direct methods9 H b Will the planned methods called for in the assessment approach ultimately meet performance standards for assessment monitoring9 ^ d Does the approach provide for monitoring wells similar in design and construction as the detectionmonuonng wells9 OWPE A 13 S950 2 e Does the approach employ taking samples during drilling or collecting core samples for further analysis9 Y/N 1 8 Are the indirect methods to be n.sed based on reliable and accepted geophysical techmquLS' a Are they capable of detecting subsurface changesresulting from contaminant migration at the site9 b Is the measurement at an appropriate level of sensitivity to detect ground water quality changes at the site9 c Is the method appropriate considering the nature of the subsurface materials9 d Does the approach consider the hmitanons of these methods9 e Will the extent of contamination and constituent concentration be based on direct methods and sound engineering judgment9 (Using indirect methods tofurther substantiate the findings) 9 Does the assessment approach incorporate any mathe matical modeling to predict contaminant movement9 Y a Will site specific measurements be utilized toaccurately portray the subsurface9 b Will the derived data be reliable9 c Have the assumptions been identified9 d Have the physical and chemical properties of the sue specific wastes and hazardous waste cbnsntuentsbeen identified9 v J Conclusions 1 Subsurface geology a Has sufficient data been collected to adequately define petrography and petrographic variation9 b Has the subsurface geochemistry been adequately defined9 V c Was the bonng/conng program adequate to definesubsurfacc geologic variation9 d, Was the owner/operator's narrative descnption complete and accurate in its interpretation of the data9 e Does the geolog'c assessment addrtss or provide means to resolve any information gaps9 2 Grouna-water flowpaths a Did the owner/operator adequately establish the hon-zontal and vertical components of ground water flow9 V OWPE A 14 9950 2 b Were appropriate methods used to establish ground water flowpaths0 c Did the owner/operator provide accurate documentation9 Y/N d Are the potentiometnc surface measurements valid0 e Did the owner/operator adequately consider the seasonal and temporal effects on the ground water0 f Were sufficient hydraulic conductivity tests performed to document lateral and vertical vanatiomn hydraulic conductivity in the entire hydrogeologic subsurface below the site9 3 Uppermost Aquifer a Did the owner/operator adequately define the upper most aquifer9 b Are the samples representative of ground water quality9 c Are the ground-water monitonng wells structurally stable9 4 Monitonng Well Construction and Design a Do the design and construcnon of the owner/operator's ground-water monitonng wells permit depth discrete ground water samples to be taken9 *Y d Does the ground water monitonng well s design and construction permit an accurate assessment of aquifer charactensucs9 v 5 Detection Monitonng a Downgradient Wells Do the location and screen lengths of the ground-water monitonng wells or clusters in the detection monitonng system allow the immediate detection of a release of hazardous waste or constituents from the hazardous waste management area to the uppermost aquifer9 V b Upgradient Wells Do the location and screen lengths of the upgradient (background) ground water monitonng weils ensure the capability of collecting ground-water samples representative of upgradient (background) ground-water quality including any ambient heterogenous chemical charactenstics9 v 6 Assessment Monitonng a Has the owner/operator adequately charactenzed site hydrogeology to determine contaminant migration9 b Is the detection monitonng system adequately designed and constructed to immediately detect any contaminant release9 1 OWPE A 15 9950 2 c Arc the procedures used to make a first aeterminationol contamination adequate9 migration Y/N V d Is the assessment plan adequate to detect characterize and track contaminant v e Will the assessment monitoring wells given site hydrogeologic conditions define the extent and concentration oi contaminanon in the r"---r.n 1 - vertical planes9 f Are the assessment monitonng wells adequately designed and constructed9 g Are the sampling and analysis procedures adequate to provide true measures of contamination9 h Do the procedures used for evaluation of assessment monitonng data result in determinations of the rate of migration, extent of migration and hazardous constituent composition of the contaminant plume9 v I Are the data collected at sufficient frequency and duration to adequately determine the rate of migration9 Y j Is the schedule of implementation adequate9 k Is the owner/operator s assessment monitonng plan adequate7 * If the owner/operator had to implement hisassessment monitonng plan was it implemented satisfactonly9 Y II Field Evaluation A Ground Water Monitoring System 1 Are the numbers depths and locations of monitonng wells in agreement with those reported m the facility s monitonng plan9 (See Section 3 2 3 ) Y B Monitoring Well Construction 1 Identify construction matenal matenal diameter a Pnmary Casing -Sea lA^e 4 I I b Secondary or outside casing 2 Is the upper ponion of the borehole sealed with conrete to prevent infiltration from the surface9 ^ T^bUS 4 I \ ^ Tc the weU fitted wh a" above ground protective UCVILC' Y Is the protective cover fitted with locks to prevent tampenng9 If a facility utilizes more than a single well design answer the above questions for each well design9 OWPE A 16 9950 2 III Review of Sample Collection Procedures A Measurement of Well Depths /Elevation 1 Are measurements of both depth to standing water and depth to the bottom of the well made9 Y/N 2 Are measurements taken to the 0 01 feet9 3 What device is used9 4 Is there a reference point established by a licensed surveyor9 5 Is the measuring equipment properly cleaned betweenwll locations to prevent cross contamination9 Ii Detection of Immiscible Layers 1 Are procedures used which will detect light phase immiscible layers9 MA 2 Are procedures used which will detect heavy phase immiscible layers9 AH C Sampling of Immiscible Layers 1 Are the immiscible layers sampled separately prior to well evacuation9 A/A 2 Do the procedures used minimize mixing with watersoluble phases9 AJA- D Well Evacuation 1 Are low yielding wells evacuated to dryness9 2 Are high yielding wells evacuated so that at least three casing volumes are removed9 3 What device is used to evacuate the wells9 i , , - , i , 1 \ 4 If any problems are encountered (e g , equipmentmalfunction) are they noted in a field logbook9 1 OWPE A 17 E Sample Withdrawal 1 For low yielding wells are samples for volariles pH and oxidation/reducuon potential drawn firu afrer the well recovers9 2 Are samples withdrawn with either flurocaibon/resins or stainless steel (316 304 or 2205) sampling devices9 9950 2 Y/N 3 Are sampling devices either bottom valve bailers or positive gas displacement bladder pumps9 4 If bailers are used is fluorocarbon/resin coated wire single strand stainless steel wire or monofilament used to raise and lower the bailer9 1 5 If bladder pumps are used are they operated in acontinuous manner to prevent aeration of the sample9 6 If bailers are used, are they lowered slowly to prevent degassing of the water9 7 If bailers are used, are the contents transferred to the sample container in a way that minimizes agitation and aeration9 -s 8 Is care taken to avoid placing clean sampling equipment on the ground or other contaminated surfaces prior to insertion into the well9 9 If dedicated sampling equipment is not used is equipment disassembled and thoroughly cleaned between samples9 10 If samples are for inorganic analysis does the cleaning procedure include the following sequential steps a Dilute acid nnse (HN03 or HC1)911 If samples are for organic analysis does the cleaning procedure include the following sequential steps 11 If samples are for inorganic analysis, does the cleaning procedure include the following sequential steps a Nonphosphate detergent wash9 b Tap water nnse9 c Distiiled/deiomzed water nnse' .1 d Acetone nnse9 e Pesticide grade hexane nnse9 OWPE A 18 9950 2 12 Is sampling equipment thoroughly dry before use9 13 Are equipment blanks taken to ensure that sample cross-contarrunation has not occurred9 14 If volatile samples are taken with a posinve gas displacement bladder pump are pumping rates below 100 ml/mm9 F In situ or Field Analyses Are the following labile (chemically unstable) parameters determined in the field a pH' b Temperature9 c Specific conductivity9 d Redox potential9 e Chlorine9 f Dissolved oxygen9 g Turbidity9 h Other (specify) 2 For m-situ determinations are they made after well evacuation and sample removal9 3 If sample is withdrawn from the well is parameter measured from a split portion9 4 Is monitonng equipment calibrated according to manufacturers' specifications and consistent with SW-8469 5 Is the date procedure and maintenance for equipment calibration documented in the field logbook9 IV Review of Sample Preservation and Handling Procedures A Sample Containers 1 Are samples transferred from the sampling device directly to their compatible containers9 OWPE A 19 9950 2 2 Are sample containers for metals (inorganics) analyses polyethylene with pOj^/iCp lcnc^upj Y/N 3 Are sample containers for organics analysis glass bottles with fluorocarbonresin lined caps9 4 If glass bottles are used for metals samples are the caps fluorocarbonresin-hned9 5 Are the sample containers for metal analyses cleanedusing these sequential steps a Nonphosphate detergent wash9 b 1 1 nitric acid nnse9 c Tap water nnse9 d 1 1 hvdrochlonc acid nnse9 e Tap water nnse9 f Distilled/deionized water nnse9 6 Are the sample containers for organic analyses cleaned using these sequential steps a Nonphosphate detergent/hot water wash9 b Tap water nnse9 - c Distilled/deionized water nnse9 d Acetone nnse9 e Pesticide-grade hexane nnse9 7 Are tnp blanks used for each sample container type to venfy cleanliness9 B Sample Preservation Procedures 1 Are samples for the following analyses cooled to 4°C a TOC9 b TOX9 c Chlonde9 d Phenols9 e Sulfate9 f Nitrate9 g Cohform bactena9 h Cvanide9 I Oil and grease9 j Hazardous constituents (}261 Appendix VIU)9 OWPE A 20 9950 2 2 Are samples for the following anaJ>ses field acidified to pH <2 with HN03 a Iron9 Y/N 1 b Manganese9 1 c Sodium9 d Total metaJs9 Y e Dissolved metaJs9 f Fluoride9 g Endnn9 Ji h Lindane9 l Methoxychlor9 j Toxaphene9 1 k 2 4 D9 1 2 4 5 TPSilvex9 m Radium9 n Gross alpha9 Y o Gross beta9 3 Are samples for the following analyses field acidfied to pH <2 with H^SO^ a Phenols9 b Oil and grease9 4 Is the sample for TOC analyses field acified to pH <2 with HCl9 5 Is the sample for TOX analysis preserved with 1 ml of 1 1 M sodium sulfite9 6 Is the sample for cyanide analysis preserved with NaOH to pH >129 C Special Handling Considerations 1 Are organic samples handled without filtering9 1 2 Are samples for volatile organics transfered to the appropriate vials to eliminate headspace over the sample9 7 3 Are samples for metal analysis split into two portions9 4 Is the sample for dissolved metals filtered through a 0 45 micron filter9 5 Is the second portion not filtered and analyzed for total metals9 v /JA- 6 Is one equipment blank prepared each day of ground water sampling9 Y OWPE V Review of Chain-of-Custody Procedures 9S50 2 Y/N 1 Are sample labels used' 2 Do they provide the following information a Sample identification number9 x b Name of collector9 c Date and time of collection9 d Place of collection9 e Parameter(s) requested and preservitives used9 3 Do they remain legible even if wet9 B Sample Seals 1 Are sample seals placed on those containers to ensure samples are not altered9 tJ C Field Logbook 1 Is a Field logbook maintained9 1 2 Does it document the following a Purpose of sampling (e g , detection or assesment)9 b Location of well(s)9 c Total depth of each well9 d Static water level depth and measurement technique9 e Presence of immiscible layers and detection method9 V f Collection method for immiscible layers and sample identification numbers9 V g Well evacuation procedures9 V h Sample withdrawal procedure9 i Date and time of collection9 V j Well sampling sequence9 k Types of sample containers and sample identification nMrnber(s)9 Preservarivets) usedr V m Parameters requested9 v n Field analysis data nnd method(s)9 o Sample distribution and transporter9 V p Field observations9 OWPE A 22 —Unusual well recharge rates9 9950 2 —Equipment malfunction(s)9 —Possible sample contamination9 —Sampling rate9 D Chain of Custody Record 1 Is a chain-of custody record included with each sample9 2 Does it document the following a Sample number9 b Signiture of collector9 c Date and time of collection9 d Sample type9 e Station locanon9 f Number of containers9 g Parameters requested9 h Signatures of persons involved in chain of-custody9 I Inclusive dates of custody9 E Sample Analysis Request Sheet 1 Does a sample analysis request sheet accompany each sample9 2 Does the request sheet document the following a Name of person receiving the sample9 b Date of sample receipt9 c Duplicates9 d Analysis to be performed9 IV Review of Quality Assurance/Quality Control A Is the \alidity and reliability of the laboratory and field generated data ensured by a QA/QC program9 B Does the QA/QC program include 1 Documentation of any devianon from approved procedures9 OWPE A 23 2 Documentation of analytical results for a Blanks9 9950 2 Y/N v b Standards9 3. c Duplicates9 d Spliced samples9 e Detectable limits for each parameter being analyzed9 v C Are approved statistical methods used9 v D Are QC samples used to correct data9 1 E Are all data critically examined to ensure it has been properly calculated and reported9 1 VII Surficial Well Inspection and Field Observation A Are the wells adequately maintained9 B Are the monitoring wells protected and secure9 1 C Do the wells have surveyed casing e!e\ations9 1 D Are the ground-water samples turbid' E Have all physical characteristics of the site been noted in the inspector's field notes (i e , surface waters, topography, surface features)9 F Has a site sketch been prepared by the field inspector with scale, north arrow, Iocation(s) of buildings, location(s) of regulated units, locations of monitoring wells, and a rough depiction of the site drainage pattern9 rJ OWPE A 24 9950 2 VIII Conclusions A Is the facilitycurrently operating under the correct monitoring progaram according to the statistical analyses performed by the current operator9 Y/N 1 B Does the ground water monitoring system, as designed and operated, allow for detection or assessment of any possible ground water contamination caused by the facility9 Y C Does the sampling and analysis procedures permit the owner/operator to detect and, where possible, assess the nature and extent of a release of hazardous constituents to ground water from the monitored hazardous waste management facility9 fop- *V\D*»T fVVP=r "THTS. £>pL£>OMby-J4rrstf- MOJITO 4H*>r&A. OWPE A-25