The URL can be used to link to this page

Home My WebLink AboutDERR-2025-001538State of Utah GARY R. HERBERT Governor GREG BELL Lieulenant Governor Department of Environmental Quality Amanda Smith Executive Director DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION Brent H. Everett Director ERRC-105-11 July 11,2011 Margaret Williams, Site Assessment Manager USEPA Region 8 1595 Wynkoop St 8EPR-B Denver, Colorado 80202-1129 Dear Ms Williams: Enclosed for your review is the Site Reassessment (SRA) Report for the Redwood Road Dump site (referred to as the "Site"). The Site was the primary landfill for Salt Lake City from 1923 until 1962. The Site is estimated to contain approximately 1,340,000 cubic yards of refuse and fill. Interstate 215 was constructed through the center of the Site in 1988 creating an eastem and westem refuse pile. The northem portion of the westem landfill is used for the City's automobile impound lot. Salt and gravel are stored on the southem portion of the westem landfill. A City vehicle washing and refueling facility is under construction on City property northwest of the eastem landfill. Snow cleared from downtown Salt Lake City in the winter is placed on the highest portion of the eastem landfill by City streets personnel, potentially increasing the volume of contaminated landfill leachate. A 1991 Site Investigation and a 2000 Targeted Brownfields Assessment have established the following: Elevated concentrations of lead (2,610 mg/kg), benzo (a) pyrene (5,000 /ig/kg) and dibenz (a, h) anthracene (1,000 /xg/kg) were identified in subsurface soils. Elevated concentrations of arsenic. (1,290 ng/L) antimony (34.2 /ig/L), selenium (14.8 /ig/L) and pentachlorophenol (3 /ig/L) have been found in Site groundwater. The sampling of downgradient wells was not included in the previous studies. Therefore, the extent of downgradient groundwater contamination is unknown. City Drain Canal surface water lead concentrations rise from a non-detectable background concentration to a high of 59.2 /ig/L downstream from the Site. This concentration significandy exceeds the surface water Criteria Continuous Concentration of 2.5 /ig/L. Arsenic levels increase from a background concentration of 61 /ig/L to 82.8 /ig/L after surface water passes the Site. A wetland environment exists ten miles downstream of the Site at the Great Salt Lake. Approximately 50 miles of wetland frontage occur within the 15 mile target distance Hmit. Several duck hundng clubs are located within these wedand areas. Site.drainage enters the Great Salt Lake at Farmington Bay Wildlife Refuge. 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144840 • Salt Lake City, UT 84114-4840 Telephone (801) 536-4100 "Fax (801) 359-8853 -T.D.D. (801)536-4414 www.deq.ulah.gnv Printed on 100% recycled paper Page 2 We recommend that an Expanded Site Invesdgation include; (1) the sampling of downgradient shallow wells and wedands and, (2) the resampling of groundwater and surface water. Inorganic and organic sampling data can then be evaluated with previously collected results to better understand threats to wedands and wildlife and the potential for site listing on the Nadonal Priorides List. After reviewing the SRA report, please inform us of any comments or changes that need to be incorporated in the final version of the document. Please contact Neil Taylor at (801) 536-4102 if you have any quesdons. Sincerely, Dale T. Urban P.G. Site Assessment Secdon Manager Division of Environmental Response and Remediadon DTU/NBT/eds Enclosure(s) SITE RE-ASSESSMENT (SRA) REPORT Redwood Road Dump Salt Lake County, Utah UTD980961502 Utah Department of Environmental Quality Division of Environmental Response and Remediation Prepared by: Neil Taylor SITE RE-ASSESSMENT (SRA) REPORT Approved: Redwood Road Dump Salt Lake County, Utah UTD980961502 Prepared by: Neil Taylor Utah Department of Environmental Quality Division of Environmental Response and Remediation //• Date: Neil Taylor, UDEQ Project Manager Approved: l/rji^ /\ IjJUv-^-^ Date: ^/^j7.o\\ DaleT. Urban, UDEQ Site Assessment Secfion Manager Approved: Date: Margaret Williams, Site Assessment Manager, EPA Region 8 TABLE OF CONTENTS 1.0 INTRODUCTION 1 2.0 SITE OBJECTIVES 1 3.0 SITE LOCATION DESCRIPTION 1 3.1 SITE HISTORY AND PREVIOUS WORK 1 3.2 CURRENT SITE CONDITIONS AND NEAR FUTURE USES 4 3.3 GEOLOGY, HYDROGEOLOGY, HYDROLOGY AND METEOROLOGY 4 3.4 SITE CONCEPTUAL MODEL 6 4.0 PATHWAY ANALYSIS 6 4.1 SITE WASTE SOURCES QUANTITY AND CH/\RACTERISTICS 6 4.2 GROUNDWATER MIGRATION PATHWAY ^ 6 4.2.1 T/\RGETS 6 4.2.2 SUMMARY OF PAST RESULTS 7 4.2.2.1 DERR 1991 Site Inspection 7 4.2.2.2 DERR 2000 Targeted Brownfields Assessment 7 4.2.3 DATA GAPS, 8 4.3 SOIL EXPOSURE PATHWAY 8 4.3.1 TARGETS 8 4.3.2 SUMMARY OF PAST RESULTS 8 4.3.2.1 UDOT 1977 Preliminary Inspection '.: 8 4.3.2.2 DERR 1991 Site Inspection :.. 9 4.3.2.3 DERR 2000 Targeted Brownfields Assessment 9 4.3.3 DATA GAPS 10 4.4 SURFACE WATER PATHWAY 10 4.4.1 T/VRGETS 10 4.4.2 SUMMARY OF PAST RESULTS : 10 4.4.2.1 DERR 1991 Site Inspection 10 4.4.2.2 DERR 2000 Targeted Brownfields Assessment 11 4.4.3 DATA GAPS 11 4.5 AIR MIGRATION PATHWAY 11 4.5.1 TARGETS 11 4.5.2 SUMMARY OF PAST RESULTS 12 4.5.2.1 UDOT 1977 Preliminary Inspection 12 4.5.2.2 DERR 2000 Targeted Brownfields Assessment 12 4.5.3 DATA GAPS 12 5.0 SUMMARY AND CONCLUSIONS 12 6.0 REFERENCES 15 LIST OF FIGURES, TABLES AND APPENDICES LIST OF FIGURES Figure 1 Figure 2 Figure 3 Site Locadon Map Site Map Conceptual Site Model LIST OF TABLES Table 1 Table 2 Table 3 Populadon Receiving Groundwater from Wells Located within Four Miles of the Site Redwood Road Dump 1991 Site Inspecfion Metals Detected in Groundwater above SCDM Benchmarks Population Estimates within Four Miles of the Redwood Road Dump LIST OF APPENDICES Appendix A Site Visit Report Appendix B EPA Preliminary Assessment Worksheet Appendix C Utah Department of Transportafion 1977 Preliminary Invesfigafion- Borehole Data Table and Utah Division of Environmental Response and Remediadon 1991 Site Invesdgation -Selected Figures and Data Tables Appendix D Utah Division of Environmental Response and Remediadon Targeted Brownfields Assessment Analytical Results Report Westem Portion of the Redwood Road Dump and the Salt Lake City Road Maintenance and Automobile Impound Lot-Selected Figures and Data Tables 1.0 INTRODUCTION Under authority of the Comprehensive Environmental Response, Compensafion, and Liability Act (CERCLA), as amended by the Superfund Amendments and Reauthorizadon Act (SARA), and in accordance with applicable provisions of the Nadonal Confingency Plan, the Utah Department of Environmental Quality, Division of Environmental Response and Remediation (DERR) has prepared this Site Reassessment Report (SRA) for the Redwood Road Dump, UTD980961502 (referred to as the "Site") in Salt Lake City, Salt Lake County, Utah. This SRA was prepared under a cooperadve agreement between DERR and the U.S. Environmental Protecdon Agency, Region 8 (EPA). The purpose of the Site details described herein is to report informafion conceming current Site conditions, assess the threat posed to human health and the environment from hazardous materials or potendal releases of hazardous materials and to support decisions regarding further invesdgadon under CERCLA or other appropriate authority. Addidonally, contaminant pathways/targets and near future uses of the Site were examined to identify if any possible changes to the property were imminent. The Site Visit Report is included as Appendix A. The EPA Preliminary Assessment Worksheet is provided as Appendix B. 2.0 SITE OBJECTIVES The objecdves of the acdvides performed during the SRA were related to assessing if hazardous substances located on-site pose a threat to human health or the environment. The objectives of this SRA were to: Determine the condnued presence of contamination in selected media; Assess the potendal contaminadon characterisdcs; Assess the potendal routes for contaminant migradon; Assess the suspected exposure pathways; Idendfy potendal targets that may be affected by on-site contaminadon as well as other targets that may be impacted by the migradon of the contamination via the suspected exposure pathways; and • Determine if condnued assessment under CERCLA is warranted. 3.0 SITE LOCATION DESCRIPTION 3:1 SITE HISTORY AND PREVIOUS WORK The Site extends west from 1900 West Street to 2200 West Street, and south from 500 South Street to Indiana Avenue (800 South) in Salt Lake City, Utah (Figure 1). The Site is approximately 70 acres in size and is owned by Salt Lake City Corporation (DERR, 1995). The Site is located in the SE 1/4 of the SE 1/4 of the NE 1/4 of Section 9, Township 1 South, Range 1 West, Salt Lake Base Meridian (USGS, 1962). The Site is bisected by Interstate 215 (1-215) and includes an eastem and westem refuse pile. The Salt Lake City Road Maintenance and Automobile Impound Lot is located directly north (across 500 South Street) of the westem portion of the Site. The Site was the primary landfill for Salt Lake City from 1923 to 1962, when it was closed to public dumping (DERR, 1995). The Site is estimated to contain approximately 1,340,000 cubic yards of refuse and fill (DERR, 1995). A manifest system was not in place at the landfill during its operation and no records remain of waste content or quantities dumped at the Site (UBSHW, 1987). In addition, no regulations were in place to limit possible hazardous waste additions to the landfill. The Site was reported to take in household, commercial and industrial wastes. The Site has experienced numerous sub- surface fires, occasional bad odors, caving and differential settling due to decomposing refuse (UBSHW, 1987). The eastem portion of the Site was used from 1962 to 1995 by Salt Lake City Corporation's Parks and Recreation Department and Public Services Department for the disposal of leaves, grass clippings, tree trimmings and storm sewer sludge (DERR, 1995). 1-215 was constructed through the center of the Site in 1988 creating an eastem and . westem refuse pile. It is believed that waste characteristics at the Site include municipal wastes such as household, commercial, industrial and organic materials. A report entitled "Preliminary Investigations Disposition of Garbage Materials in Abandoned Landfill" (PI) was prepared for the Utah Department of Transportation (UDOT), Salt Lake City, Utah, by Dr. David W. Eckhoff in July of 1977 (Eckoff, 1977). The investigation found that mixed garbage and refuse had been dumped and burned on the Site. Twenty auger holes were drilled into the landfill. Forty three measurements for explosive gas were taken at five foot intervals within the drill holes. The borehole explosive gas concentrations are provided in Appendix C, Table 1. The refuse and cover material in the interstate right-of-way was moved to the east pile during the construction of 1-215 in 1988 (DERR, 1995). A Preliminary Assessment (PA) of the Site was prepared by the Utah Department of Health's Bureau of Solid and Hazardous Waste in 1987. A 1991 Site Inspection (SI) sampling event included seven groundwater samples, three surface water samples, ten soil samples and three sediment samples (DERR, 1992). The monitoring well physical groundwater parameters are provided in Appendix C, Table 2. The organic data results for groundwater and surface water samples are provided in Appendix C, Table 3. The inorganic analyses for groundwater and surface water samples are provided in Appendix C, Table 4. The organic analyses for soil and sediment samples are provided in Appendix C, Table 5. The inorganic analyses for soil and sediment samples are provided in Appendix C, Table 6. The original report sample location map is provided as Appendix C, Figure 5. Figure 5a places the approximate sample locations on a 2008 satellite photograph. Figure 5b provides arsenic concentrations for soil and groundwater samples. The original report Site groundwater map is provided as Figure 6. EPA Region 8 gave the Site a higher priority for further investigation under CERCLA on January 27, 1992 (USEPA, 1992). DERR conducted a Site Inspection Prioritization (SIP) for the Site in September, 1995. The report concluded that the Site may present hazards to those working and living near it, as well as to transients and bottle collectors (DERR, 1995). Although the Site is vegetated and surface runoff is slow, the SIP concluded that the accumulated refuse, soil, and shallow groundwater contain hazardous substances and these present a threat to human health and the environment. Chromium and lead contaminated soils were illegally placed on the central part of the eastem landfill some time during December of 1991 by Tool Design Engineering and Manufacturing facility personnel (DSHW, 2010). Chromium concentrations in samples collected from the soil ranged from 1,240 mg/kg to 3,300 mg/kg. Lead concentrations ranged from 1,000 mg/kg to 1,800 mg/kg. The contaminated soils were discovered in 1992.. Approximately 310 cubic yards of soil was removed from the landfill under the supervision of the Division of Solid and Hazardous Waste and Terracon Consultants in November 1997. All eight cleanup verification samples were non-detect for chromium. Seven of eight confirmation samples were non-detect for lead with the remaining sample yielding 0.1 mg/kg lead (Terracon, 1997). The EPA residential screening level for lead is generally 400 mg/kg. DERR conducted a Targeted Brownsfields Assessment (TBA) for the westem portion of the Site and the Salt Lake City Road Maintenance and Automobile Impound Lot in June, 2000. Selected figures from that assessment together with 2008 satellite photo overlays are provided as Appendix D. Field work was conducted to assist Salt Lake City Corporation in gathering additional information about the Site (DERR, 2001). Appendix D, Figure 1 identifies the approximate location of trenches cut and sample locations. Phase I consisted of using a backhoe to cut trenches into the subsuiface to evaluate the extent and type of refuse present. Soil samples were collected from selected locations. Phase II consisted of installing 15 direct push borings across the westem landfill. Soil, soil gas, groundwater and surface water samples were collected and submitted for laboratory analysis of volatile organics, semivolatile organics, metals and pesticides. Field observations from the June 15, 2000 trenching and investigation activities suggest the extent of refuse in the westem landfill is potentially limited to the landfill's eastem bench. The Portland Cement Superfund site is located directly south of the eastem landfill and Indiana Avenue on approximately 71 acres. The risks posed by the Portland cement site were derived from cement kiln dust and chromium bearing bricks which were landfilled within the Site boundaries. The dust contained several heavy metals including: arsenic, cadmium, chromium, lead, manganese and molybdenum. The contaminated soil, kiln dust and chromium bricks were removed from the Portland cement site from 1992 through 1997. The Portland Cement site Record of Decision for Operable Unit Three (groundwater) states that groundwater contamination is contained in the shallowest aquifer within the Portland Cement site boundaries by a canal on the eastem boundary of the Portland Cement site known as the "City Drain", a City sewer line on the east and north of the site, and a storm water ditch west of 1-215. Analytical results of semiannual groundwater monitoring beneath the Portland Cement site indicate that the contaminant plume is limited to shallow groundwater within the Portland Cement site boundaries (DERR, 2007). 3.2 CURRENT SITE CONDITIONS AND NEAR FUTURE USES The northem portion of the westem landfill and the sliver of land directly north of the westem landfill across 500 South Street are used for Salt Lake City's automobile impound lot. Salt and gravel are stored on the southem portion of the westem landfill. Both landfills are perimeter fenced (DERR, 2010a). The landfills are closed to the public with no dumping allowed (Pope, 2010). The eastem landfill is elevated about 10 feet above the natural ground surface and is covered with soil and natural vegetation. The landfill is about 300 yards wide and 400 yards long. Various materials are stored on a flat area northeast of the eastem landfill. Some of these materials include soil from the City cemetery, wooden posts, large flowerpots for decorative downtown projects, and large utility poles. A City vehicle washing and refueling facility is under construction on City property northwest of the eastem landfill. The City chips trees, limbs and leaves on a large asphalted area southeast of the eastem landfill. This material is later hauled to the county landfill for composting. Plans are being considered to extend this asphalted area further north and convert the area into a temporary model airplane airport. Access to the landfill outside the asphalted area will remain restricted (Pope, 2010). Snow cleared from downtown Salt Lake City is placed on the highest portion of the eastem landfill by City streets personnel. An area on the elevated eastem landfill has been leveled and covered with clay and gravel for this purpose. 3.3 GEOLOGY, HYDROGEOLOGY, HYDROLOGY AND METEOROLOGY The Site is located within the Jordan River Valley of the Great Basin Section of the Basin and Range Physiographic Province. The Jordan River Valley is bounded by the Wasatch Mountains to the east, the Oquirrh Mountains to the west, the Traverse Mountain Range , to the south, and the Great Salt Lake to the north. Basin-fill deposits were eroded from the Wasatch and Oquirrh Mountains and deposited in the Salt Lake Valley. The general stratigraphy of the area is characterized by several hundred to several thousand feet of unconsolidated and semi-consolidated basin fill deposits. Mountain streams and historical lakes carried most of the sediment into the basin and ancient Lake Bonneville. The fine-grained sediments were deposited in deeper portions of Lake Bonneville. The coarser-grained sediments were deposited along the margins of ancient Lake Bonneville near the mountains as its level eventually receded to its present level as the Great Salt Lake (Waddell, et al, 1987). Precipitation that falls as rain or snow in the mountain ranges flows down the range fronts and recharges the deep aquifer within the Salt Lake Valley. The shallow water table aquifer is geiierally recharged by downward infiltration from precipitation, canals, irrigated lands and streams as well as by upward leakage from the underlying confined aquifer (Waddell, et al, 1987). Surficial basin fill deposits within the Salt Lake Valley generally consist of a series of Quaternary lacustrine, alluvial fan, sand dune, mud-rock flow, ash falls, glacial and flood plain sediments. Groundwater occurs within these valley fill deposits as a complex series of aquifers (Waddell, et al, 1987). The deeper aquifer lies in Quaternary deposits of clay, silt, sand, and gravels that are hydraulically interconnected with individual beds of sand and gravel ranging in thickness from less than one foot to tens of feet. The maximum thickness of the principal aquifer is greater than 1,000 feet in the northem portion of the valley. Most deep wells in the Salt Lake Valley are completed in sediments at depths of less than 1,200 feet. Municipal wells within four miles of the Site are completed at depths of 1,100 feet and less (DERR, 1992). There are no wells currently in use on-site (DERR, 2010a). Drilling logs from the four monitoring wells installed at the Site in 1991, in addition to the well logs from the neighboring Portland Cement site (UTD980718670) reveal a lithology of clay, silt and sand beneath the landfill (DERR, 1995). A soil survey of the Salt Lake area identified the soils at the Site as dumps (Du), Salt Air Siity Clay Loam (Sa), Loamy Borrow Pits (Lo), Sandy Terrace Escarpments (Sc), and Decker Fine Sandy Loam (De) (DERR, 1992). Groundwater flow in the shallow aquifer although complex, due to the interaction with local surface water and underground utility pathways, is generally to the northwest. Appendix C, Figure 6 provides known groundwater contours and the anticipated groundwater flow direction. A 42 inch sanitary sewer is buried at an average depth of 17 feet below grade on the eastem border of the Site. The bedding material of the sewer line appears to be removing groundwater from the shallow aquifer and routing it to the City Drain. Groundwater flow under the eastem landfill also appears to be toward the City Drain (DERR, 1992). The Salt Lake Valley is located in the Great Basin drainage system, which is a closed system with no outlets. The Jordan River and its tributaries form the main drainage for the valley. The Jordan River is a Class 3C stream and discharges into the Great Salt Lake. The Surplus Canal and the City Drain are located in close proximity to the Site. The City Drain is located west of 1-215 and just east of the westem landfill. The surplus Canal is a losing stream and likely receives no contribution from contaminated groundwater (EPA, 1998). The "North Ditch" drains the City property northeast of the ; eastem landfill. The ditch is piped to a storm drain that flows to the City Drain. The City Drain is the primary groundwater discharge point. The City Drain joins the Sewer Canal approximately six miles to the north of the site. The Sewer Canal eventually discharges into the Great Salt Lake. The Surplus Canal is located approximately 1,000 feet to the west of the Site. The discharge points for the Jordan River, the Surplus Canal and the Sewer Canal into the Great Salt Lake are characterized by freshwater marshes. The discharge points are within the confines of the Farmington Bay Waterfowl Management Area (DERR, 1992). The Salt Lake Valley is characterized as being semiarid. The normal maximum temperature ranges from 37.0° F. in January to 93.7° F in July. The normal minimum temperature ranges from 19.7° F in January to 61.8° F in July. The average annual rainfall is 15.31 inches per year with a normal monthly high of 2.21 inches in April and a normal monthly low of 0.72 inches in July. The average annual snowfall is 58.0 inches. The estimated pan evaporation is a 3.91 inches per year. The winds are predominantly from the south and southeast and have a mean speed of four to five miles per hour (Ashcroft, 1992). 3.4 SITE CONCEPTUAL MODEL Water from precipitation and snow dumping flow through the unlined landfill waste. The leachate contaminates shallow groundwater. The contaminated groundwater flows to the City Drain Canal which bisects the site and is carried north by surface water flow into wetlands and bird habitats. Contaminated groundwater also flows to the northwest in the subsurface, potentially contaminating shallow, private water wells. The site conceptual model is illustrated as a flow chart in Figure 3. 4.0 PATHWAY ANALYSIS 4.1 SITE WASTE SOURCES QUANTITY AND CHARACTERISTICS Both west and east landfills contain municipal trash and unknown quantities of hazardous materials. Both petroleum and chemical wastes were found in soil borings that were part of a 1977 UDOT landfill waste investigation. The volume of the landfills is calculated at approximately 1,338,000 cubic yards (Eckoff, 1977). The landfills are not properly contained to minimize leaching of materials into the shallow groundwater. 4.2 GROUNDWATER MIGRATION PATHWAY 4.2.1 TARGETS Seventeen municipal wells from three cities are located within the four mile target distance range. All wells are located east or south of the Site and hydraulically upgradient (DDW, 2010a; DDW, 2010b). All three city water systems are blended with multiple groundwater and surface water sources. Table 1 identifies the population served by the three public water systems having wells located within four miles of the Site. Table 1 Population Receiving Groundwater from Wells Located within Four Miles of the Site System Name Population Served Granger-Hunter Improvement District 106,000 Salt Lake City 387,506 South Salt Lake 18,000 Total Population Served 511,506 Approximately 4,102 underground points of diversion are located within four miles ofthe Site. The uses for the large majority are for "domestic" or irrigation purposes and most are upgradient of the Site (DWR, 2010). The closest downgradient well is approximately 400 yards northwest of the Site, north of 500 South and east of the Surplus Canal. The well is 2 inches in diameter, 280 feet deep and was drilled in 1947. All downgradient wells within 1.5 miles are from 200 to 400 feet deep, artesian wells, drawing from the deeper, confined aquifer. It is likely that shallow groundwater flows into the City Drain Canal that bisects the site. 4.2.2 SUMMARY OF PAST RESULTS 4.2.2.1 DERR 1991 Site Inspection Four monitoring wells installed by EPA and two Portland Cement CERCLA Site monitoring wells to the south of the Site were sampled (Appendix C, Figure 5). A duplicate sample was also collected from RD-MW-02. Appendix C, Tables 3 and 4 summarize the analytical results for the seven groundwater samples. All samples were analyzed for volatiles, base-neutral/acid extractables, pesticides, PCBs and metals. There were no pesticide or volatile compounds detected in the groundwater samples. There were no organic chemical concentrations found above Superfund Chemical Data Matrix (SCDM) benchmarks (SCDM, 2004). Appendix C, Table 4 lists the inorganic analyses. A summary of the metals detected near or above SCDM benchmarks is provided in the table below. Arsenic was detected at 314 /ig/L, 248 /ig/L and 179 /ig/L in three of the four downgradient wells compared to 19 /ig/L in the background well.. Sample RD-MW-05 contained 34.2 /ig/L antimony. Selenium was detected in RD-MW-01 at 14.8 /ig/L. Table 2 Redwood Road Dump 1991 Site Inspection Metals Detected in Groundwater above SCDM Benchmarks Metal MCL RDSC CRSC Highest (/ig/L) (Mg/L) (Mg/L) Concentration Detected (Mg/L) Arsenic 10 11 0.57 314 Antimony 6 15 -34.2 Selenium 50 180 14.8 MCL = Drinking Water Maximum Contaminant Leve RDSC = Reference Dose Screening Concentration CRSC = Cancer Risk Screening Concentration 4.2.2.2 DERR 2000 Targeted Brownfields Assessment Approximately 15 direct push borings were installed across the Site during the 2000 TBA. Soil, soil gas, groundwater and surface water samples were collected and submitted for volatile organic, semivolatile organic, pesticides, PCBs and dissolved metals analysis. Sampling results from the June 2000 TBA revealed pentachlorophenol in sample RRD- 11 at an estimated concentration of 3 /ig/L. The MCL for this compound is 1 /ig/L. No . other organics were detected in the groundwater above SCDM benchmarks (DERR, 2001). Arsenic was detected in many groundwater samples above the MCL of 10 /ig/L. Arsenic was found in sample RRD-1 at 1,290 /ig/L and in RRD- 2 at 1,000 /ig/L. Both sample locations are north of the Site (Appendix D, Figure 5). Dissolved arsenic was reported in RRD-7 at an estimated concentration of 1,170 /tg/L. Other groundwater samples ranged from 2.4 /ig/L to 236 /xg/L. No other dissolved metals were detected in the groundwater above SCDM benchmarks. The sampling locations and groundwater arsenic concentrations from the June 2000 sampling event are included as Appendix D, Figure 5. 4.2.3 DATA GAPS No shallow groundwater samples have been collected farther downgradient (northwest) ofthe Site than the City impound lot north of 500 South. The closest downgradient well, located approximately 400 yards northwest of the Site, has not been sampled. No groundwater sampling has been conducted since June 2000. The present extent of downgradient arsenic groundwater contamination is therefore unknown. 4.3 SOIL EXPOSURE PATHWAY. 4.3.1 TARGETS The Redwood Road Dump is enclosed by chain link and barbed wire fences. This barrier prevents unauthorized vehicle access (DERR, 2010a). There is no on-site population or residences. There are no schools or day cares located within 200 feet of the site. 4.3.2 SUMMARY OF PAST RESULTS 4.3.2.1 UDOT 1977 Prehminary Inspection One rotary hole and 19 auger holes were drilled into the landfill from April to May 1977. Forty three refuse (soil) samples were analyzed for total solids, volatile solids, BOD, and moisture content. Explosive gas concentrations were measured for a few holes in April 1977 and measured twice in May 1977 for all holes at various depths. Borehole explosive gas concentrations ranged from zero to 27 percent by volume (Eckoff, 1977). Explosive gas concentrations are provided as Appendix C, Table 1. Several locations repeatedly yielded methane concentrations above the lower explosive limit (LEL). Two of the sampling locations showed methane concentrations above 10 percent by volume. In 12 of the 20 borings, petroleum products were found at or near the water table. One of the drill holes, G-3C, cited the presence of a "chemical waste" at a depth of 8-10 feet. Thickness of the refuse in the landfill was determined to vary between one foot and 29 feet, with the refuse-natural ground interface undulating between elevations of 4216-4224 feet above sea level. 4.3.2.2 DERR 1991 Site Inspection Ten soil samples were collected numbering RD-SO-01 through RD-SO-10. Sample locations are shown in Appendix C, Figure 5 and 5a. Eight of the ten were surface samples. Sample RD-SO-02 is the background sample. Samples RD-SO-06 and RD-SO- 07 can be considered source samples of "oily waste" taken near the water table from monitoring wells MW- 2 and MW-4. It does not appear that these two samples were submitted for inorganic analysis. Sample results can be found in Appendix C, Tables 5- 6. Appendix C, Tables 5 and 6 sunmfiarize the analytical data results for soil and sediment samples. Site soils contain above background concentrations of 21 BNA compounds, five VOA compounds, 12 pesticide compounds, and one PCB compound. None are above SCDM benchmarks. The PCB compound, aroclor-1260, was detected in RD-SO- 09 at 150 ppb. Table 6 indicates a release of at least 10 metals to the soil has occurred at the Site. Concentrations of barium, calcium, chromium, copper, iron, lead, mercury, nickel, sodium, and zinc were detected over three times that of the background sample. None were above SCDM benchmarks. However, lead has no established SCDM benchmark. Lead was detected in sample SO-10 at 2,610 mg/kg in the northem comer of the westem landfill. This sample was taken directly above the refuse inside a hole previously used to excavate old bottles about three feet below ground surface. 4.3.2.3 DERR 2000 Targeted Brownfields Assessment Soil samples were collected during installation of the direct push groundwater samples and from selected trench locations across the Site. Soil samples were collected directly at the soil/water interface. Most soil samples were collected between seven to nine feet below ground surface. Soil sample locations are provided as Appendix D, Figure 1 and provide 2008 satellite imagery for the sample locations. Lead was reported in sample T-3 at 1,760 mg/kg. Lead was reported in sample SB-2 at an estimated concentration of 1,930 mg/kg. Poly nuclear aromatic hydrocarbon compounds were detected from the base of a trench cut (SB-2) along the central portion of the east bench. Soil samples collected from the base of the 10 foot trench cut revealed benzo (a) pyrene at 5,000 ug/kg and dibenz (a,h) anthracene at 1,000 ug/kg. The SCDM CRSC for both compounds is 880 ug/kg. Selected figures from the study are provided in Appendix D. Figure 4 is the original report sample map identifying the benzo (a) pyrene concentrations found in soil samples from the westem landfill. Figure 4a is the historic report sample map detailing the lead concentrations at the westem landfill. No VOCs, SVOCs or PCBs/Pesticides were detected in any other samples above SCDM benchmarks or the EPA Region 3 commercial/industrial soil screening criteria. Arsenic was reported in all soil samples collected from the westem landfill. The highest reported concentration was 43.9 mg/kg with the remaining concentrations ranging from 6.0 mg/kg to 25 mg/kg. 4.3.3 DATA GAPS Only limited subsurface soil hazardous constituent analysis has'been conducted for the eastem landfill. . 4.4 SURFACE WATER PATHWAY 4.4.1 TARGETS There are no surface drinking water sources within the 15 mile target distance limit. Surface waters are not used for fishing within 15 downstream miles. A wetland environment exists at the Great Salt Lake which is approximately 10 miles downstream of the Site (Appendix B, Figures on pages 10 and 11). Approximately 50 miles of wedand frontage occur within the 15 mile target distance limit (USDI, 1990). Several duck hundng clubs are located within these wetland areas (DWLR, 2010). The Site is located in a 100 year flood zone (FEMA, 2010). 4.4.2 SUMMARY OF PAST RESULTS 4.4.2.1 DERR 1991 Site Inspection Three surface water samples were collected at the Site, as well as three sediment samples (see Appendix C, Figure 5 and 5a). A quality control trip blank water sample was also taken. Upgradient and downgradient water samples were collected from the City Drain and a water sample was taken from the unnamed north ditch. The up-gradient City Drain sample served as the background sample. Sediment samples were taken in the same general location as the surface water samples. Surface water sample results tables from this investigation are provided in Appendix C (Tables 3-6). The SCDM surface water environmental pathway benchmark for acute exposure is the Criteria Maximum Concentration (CMC) and the benchmark for chronic exposure is the Criterion Chronic Concentration (CCC). The environmental toxicity of metals in surface water depends upon water hardness. As the water hardness of the City Drain has not been determined, the default CMC and CCC values for a water hardness of 100 mg/L is provided. Lead was detected in the north ditch sample at 23.6 /ig/L. The CMC for lead is 65 /tg/L and the CCC for lead is 2.5 /ig/L. Antimony was detected at 25 /ig/L from RD-SW-02. No CMC or CCC for antimony has been established. Arsenic was also detected in the upgradient City Drain sample at 53.4 /ig/L and in the downgradient sample at 59.2 /tg/L (CMC = 340 /ig/L, CCC = 150 /ig/L). . Appendix C, Table 5 identifies the 11 BNA, six pesticide and two VOA compounds that were detected in the sediment samples. The majority of these contaminants were detected in the north ditch, indicating they most probably originated from the landfill. 10 The north ditch sediment sample contained three metal concentrations that were more than three times the concentration in the upgradient City Drain sediment sample. These metals include lead (68.2 mg/kg), magnesium (33,000 mg/kg) and zinc (222 mg/kg). 4.4.2.2 DERR 2000 Targeted Brownfields Assessment Surface water samples RRD-SW-1, RRD-SW-2 and RRD-SW-3 were collected from the City Drain which borders the westem landfill on the east. RRD-SW-4 was collected from the northem portion of a possible wedand area identified on the central portion of the eastem landfill. RRD-SW-5 was a duplicate of RRD-SW-4. Appendix D, Tables 3, 6, 9 and 12 summarize the surface water analytical results. Arsenic was reported in the southemmost (background) surface water sample (RRD-SW- 1) at 61 /ig/L, in RRD-SW-2 at 79.7 /ig/L and in RRD-SW-3 at 82.8 /ig/L. All measured surface water arsenic concentrations were below the CMC (340 /tg/L) and the CCC (150 /ig/L). Lead increased from the background non-detect concentration to 56.1 /ig/L at RRD-SW-2 and 50.3 /ig/L at RRD-SW-3 (CMC = 65 /ig/L, CCC = 2.5 /ig/L). No other metals were reported above SCDM benchmarks. 4.4.3 DATA GAPS Determining the appropriate metal toxicity benchmark requires knowing the average hardness of City Drain surface water. This value has not yet been determined. 4.5 AIR MIGRATION PATHWAY 4.5.1 TARGETS There is no on-site population or residences at the Redwood Road Dump. There are no schools or day cares located within 200 feet of the site. There is a population of 130,095 within the four-mile Target Distance Limit (DERR, 2010b). Table 3 lists the target population within various distances. Both westem and eastem landfills are fenced. Two means of access are available to the eastem landfill; one is from the north through a gate which is locked at night, and one from the south through a road barrier. Approximately 50 miles of wedand frontage occur within the 15 mile target distance limit (USDI, 1990). Table 3 Population Totals within Four Miles of tlie Redwood Road Dump Distance Population Cumulative Population 0.25 Miles 50 50 0-0.5 Miles 2,202 2,252 0.5-1 Miles 8,644 10,896 1-2 Miles 23,053 33,950 2-3 Miles 33,186 67,136 3-4 Miles 62,959 130,095 11 4.5.2 SUMMARY OF PAST RESULTS 4.5.2.1 UDOT 1977 Preliminary Inspection One rotary hole and 19 auger holes were drilled into the landfill from April to May 1977. Explosive gas concentrations were measured for a few holes in April 1977 and measured twice in May 1977 for all holes at various depths. Several locations repeatedly yielded methane concentrations above the lower explosive limit (LEL). 4.5.2.2 DERR 2000 Targeted Brownfields Assessment Soil gas samples were collected from two locations along the eastem bench of the westem landfill in accordance with the protocol established in the TBA Workplan and analyzed for methane. Methane was reported in SG-1 at 23,000 ppmV (46 percent of the lower explosive limit). Methane was not reported in SG-2 above the level of detection. 4.5.3 DATA GAPS None identified. 5.0 SUMMARY AND CONCLUSIONS The Site was the primary landfill for Salt Lake City from 1923 until 1962 and is . estimated to contain approximately 1,340,000 cubic yards of refuse and fill. The Site was reported to take in household, commercial and industrial wastes. 1-215 was constmcted through the center of the Site in 1988 creating an eastem and westem refuse pile. The refuse and cover material in the interstate right-of-way was moved to the east pile during the construction. Thickness of the refuse in the landfill varies between one foot and 29 feet, with the refuse-natural ground interface undulafing between elevations of 4216-4224 feet. Chromium and lead contaminated soils were illegally placed on the central part of the eastem landfill some time during December of 1991. The contaminated soils were removed from the landfill in November 1997. The northem portion of the westem landfill is used for Salt Lake City's automobile impound lot. Salt and gravel are stored on the southem portion of the westem landfill. The eastem landfill is elevated about 10 feet above the natural ground surface and is covered with soil and natural vegetafion. The eastem landfill is about 300 yards wide and 400 yards long. Various materials are being stored on a flat area northeast of the eastem landfill. A City vehicle washing and refueling facility is under constmction on City property northwest of the eastem landfill. Plans are being considered to extend this asphalted area further north and convert the area into a temporary model airplane airport. Snow cleared 12 from downtown Salt Lake City in the winter is placed on the highest portion of the eastem landfill by City streets personnel. The Portland Cement Superfund site is located directly south of the eastem landfill and south of Indiana Avenue. Semiannual monitoring of the contaminated groundwater beneath the Portland Cement site indicates that the shallow aquifer contaminant plume confinues to be contained within the Portland Cement site boundaries. The 1991 SI and 2000 Targeted Brownfields Assessment have established the following: • Soil - Concentrations of barium, calcium, chromilim, copper, iron, mercury, nickel, sodium, and zinc were detected in surface soils over 3 times that ofthe background sample. In particular, lead was detected in the subsurface soils as high as 2,610 mg/kg. Concentrations of benzo (a) pyrene (5,000 /ig/kg) and dibenz (a, h) anthracene (1,000 /xg/kg) were identified in subsurface soils above SCDM benchmarks. The SCDM CRSC for both compounds is 880 /xg/kg. There is no on-site population or residences at the Redwood Road Dump. There are no schools or day cares located within 200 feet of the site. • Groundwater - The presence of arsenic (1,290 Mg/L) antimony (34.2 /xg/L), selenium (14.8 /xg/L), pentachlorophenol (3 Mg/L) have been found in Site groundwater above SCDM benchmarks. Arsenic contamination above the 10 ng/L groundwater MCL is widespread. However, the closest downgradient well, located approximately 400 yards northwest of the Site, has not been sampled. The extent of downgradient groundwater contamination to the northwest is, therefore, unknown. Seventeen municipal wells from three cities are located within the four mile target distance limit. All are located east or south of the Site and hydraulically upgradient. All downgradient wells are privately owned. Surface water - The City Drain Canal bisects the site. Water from the canal eventually enters the Great Salt Lake at Farmington Bay Wildlife Refuge approximately 10 miles downstream of the site. Approximately 50 miles of wetland frontage occur within the 15 mile target distance limit (USDI, 1990). Several duck hunting clubs are located within these wetland areas. There are no surface drinking water sources within the 15 mile target distance limit of the Site. Surface waters are not used for fishing within 15 downstream miles. City Drain Canal surface water lead concentrations rise from a non-detectable background concentration to a high of 59.2 /xg/L downstream of the Site. This concentration significantly exceeds the surface water CCC of 2.5 /xg/L. However, although elevated levels of lead have been detected in subsurface site soils, elevated levels of lead have not been detected in Site groundwater. Arsenic levels 13 increase from a background concentration of 61 /xg/L to 82.8 /ig/L downstream of the Site. 14 6.0 REFERENCES Ashcroft, G.L., D.T. Jensen, and J.L. Brown, 1992, Utah Climate. Eckoff, David W., 1977. Preliminary Investigations Disposition of Garbage Materials in Abandoned Landfill. (Submitted to Utah Department of Transportation). Federal Emergency Management Agency (FEMA), Flood Zone Map for Salt Lake City, Utah, 1986, at fema.gov, checked April 8, 2010. Salt Lake City Parks, 2010, personal conversation with Val Pope (Pope), Director, March 22, 2010. Superi'und Chemical Data Matrix (SCDM), USEPA, 28 January 2004. Terracon, 1997, Soil Removal and Sampling Report, Tool Design Engineering and Manufacturing Inc. Indiana Landfill Site Salt Lake City, Utah Terracon Project Number 61967065, December 4, 1997. U.S. Department of the Interior (USDI) (1990), Fish and Wildlife Service, National Wedands Inventory Maps of Salt Lake City North, Utah, 7.5 minute quadrangle. U.S. Geological Survey, 1962, 7.5 Minute Topographic Map, Salt Lake City North, Utah. U.S. Geological Survey (USGS) Water Annual Statistics for the Nation website: http://waterdata.usgs.gov/usa/nwis/sw and visited December 8, 2009. U.S. Environment Protection Agency (USEPA), 1998, Portland Cement Superfund Site, Salt Lake City, Utah, Record of Decision Operable Unit Three-Groundwater, August 17, 1998. U.S. Environment Protection Agency Region VIII (USEPA), 1992, Site Inspection Decision Sheet, January 27, 1992, Redwood Road Dump. Utah Bureau of Solid and Hazardous Waste, 1987. Preliminary Assessment, Redwood Road Dump, Salt Lake City, Utah, UTD980961502. Utah Division of Drinking Water (DDW) (2010a) geographic information system database reviewed April 12, 2010. Utah Division of Drinking Water (DDW) (2010b) public water system database reviewed April 12, 2010. Utah Division of Environmental Response and Remediation, 1992. Analytical Results Report, Redwood Road Dump Site, Salt Lake City, Utah, UTD980961502. 15 Utah Division of Environmental Response and Remediation (DERR), 1995, Site Inspection Prioritization Redwood Road Dump Site, Salt Lake County, Utah, UTD980961502, September 27, 1995. Utah Division of Environmental Response and Remediation (DERR), 2001, Targeted Brownfields Assessment and Analytical Results Report, Utah Division of Environmental Response And Remediation Westem Portion ofthe Redwood Road Dump and the Salt Lake City Road Maintenance and Automobile Impound Lot, Salt Lake County, Utah William L. Rees, September 5, 2001. Utah Division of Environmental Response and Remediation (DERR), 2007, Semiannual Monitoring Report, Portland Cement Site OU #3, Salt Lake City, Utah. October 2007. Utah Division of Environmental Response and Remediation (DERR), 2010a, Site Visit for Redwood Road Dump, March 9 and 22, 2010. Utah Division of Environmental Response and Remediation (DERR); 2010b, Census 2000 rfato, GIS layer name: pop_blkgrp shp. Utah Division of Solid and Hazardous Waste (DSHW) Tool Design Site Files reviewed April 7, 2010. Utah Division of Water Rights (DWR); 2010, Water Rights Points of Diversion Data. Utah State Geographic Information Database (GIS) layer name: wrpad.shp. Accessed April 12, 2010. Utah Division of Wildlife Resources (DWLR), 2010, Farmington Bay Waterfowl Management Area http://wildlife.utah.gov/habitat/farmington bay.php accessed April 12, 2010. Waddell et al, 1987; K.M. Waddell, R. L. Deiler, Mehssa Santini, and D.K. Soloman; Ground-Water Conditions in Salt Lake Valley, Utah, 1969-83, and Predicted Effects of Increased Withdrawals from Wells; State of Utah, Department of Natural Resources, Technical Publication No. 87. 16 FIGURES I- Site Boundary I Landfills 0.25 0.125 0 0.25 Miles Utah Department of Environmental Quality Division of Environmental Response and Remediation Figure 1 Site Location Map Redwood Road Dump Site Salt Lake County, Utah by: Neil B. Taylor Date: 04/08/2010 4 •*' if' » I 1 f f i ll \' fiiil" liiil ; 'v-ir^ • i f' • TV I* -•.^L*' I Sewer I Landfills City Drain """"" NorthDrain 400 200 0 400 Feet Utah Department of Environmental Quality Division of Environmental Response and Remediation Figure 2 Site Map Redwood Road Dump Site Salt Lake County, Utah by: Neil B. Taylor Date: 04/08/2010 CS 3 HI s o u I 3 Q cs o Pi O O u So O t/3 • B O ou n d w t o ai n cS c Q rt ? c o (5 00 „ o I I.i 5 s D. E o U ajSByW iBdpiunjv i|ijpuBq APPENDIX A SITE VISIT REPORT SITE VISIT REPORT For the Redwood Road Dump CERCLIS ID UTD980961502 On March 9 and 22, 2010 Neil Taylor with the Utah Department of Environmental Quality, Division of Environmental Response and Remediation conducted a site visit of properties associated with the investigation of the Redwood Road Dump (Site). This report describes the Site visits. Supporting photographs can be found at the end of the visit description. On March 22, Neil Taylor was accompanied by Val Pope, Parks ^ Division Manager with the Salt Lake City Department of Public Services. The Site is located between 500 South on the North and Indiana Avenue on the South and from 1900 West on the East to 2200 West on the West. The Redwood Road Dump consists of westem and eastem covered landfills. Historically the landfills were one unit but are now bisected by 1-215. Both landfills are covered with soil and vegetated with native grasses. We first entered the eastem landfill using an access road located directly behind the Parks Division building which is located at 1963 West 500 South. Various materials are being stored on the flat area northeast of the elevated and covered eastem landfill. Some of these materials include soil from the city cemetery, wooden posts, large flowerpots for decorative use downtown, and large utility poles. A city vehicle washing and refueling facility is under construction just northwest of the eastem landfill. Trees limbs and leaves are chipped up on a large asphalted area southeast of the eastem landfill. This material is later hauled to the county landfill for composting. Snow cleared from downtown in the winter is dumped on the highest portion of the eastem landfill. An area on the elevated eastem landfill has been leveled and covered with clay and gravel for this purpose. An open ditch runs north northeast from the Southeastem property drainage to behind the Parks Division building. The drainage is then piped from the Southwest quarter of the Parks building to a storm drain on 500 South. The "North Drain" described in previous site investigation reports, no longer appears to exist. The narrow, elevated, westem portion of the landfill is located just west of 1-215 and the City Drain canal and east of a variety of city and private properties mnning down Delong Street (2105 West). A row of commercial businesses are located on the northem portion of Delong Street. The city impound lot is located east of these properties. The northem half of the westem landfill is located east of the city impound lot. The Salt Lake City Streets Division owns the southem half of Delong Street. This includes the southem half of the westem landfill. The elevated southem half of the landfill is being used for storage of a variety of gravel used in street repair and tree limbs. Figure 1 Looking southwest on site access road, east of the eastem landfill. Soil piles are from city cemetery. Elevated area in the background is the eastem landfill. Figure 2 Stored logs in front of raised edge of eastem landfill. Figure 3 City vehicle washing and fueling facility under constmction north of the eastem landfill (looking south). Figure 4 Large truck washing facility north of the eastem landfill. Elevated area in the background is the eastem landfill (looking south). Figure 5 An asphalted area located southeast of the eastem landfill and used for storage of chipped trees, limbs and leaves (looking northeast). Figure 6 Northem end of the westem landfill located next to 1-215 and east of the city impound lot in the foreground (looking southeast). Figure 7 Looking east at the high-voltage power poles installed through the top of the westem landfill. Observation point is from the city's storage yard located directly west of the westem landfill. Figure 8 Looking northeast from the Salt Lake City Streets Division Delong storage yard to the cleared summit of the westem landfill. Note the pile of vegetation stored at the top of the westem landfill. APPENDIX B EPA PRELIMINARY ASSESSMENT WORKSHEET PREPARER'S NAME: Neil Taylor SITE NAME: Redwood Road Dump DATE: July 5, 2011 B-l PA Worksheet Page 2 MAJOR CONSIDERATIONS A) DOES ANY QUALITATIVE OR QUANTITATIVE INFORMATION EXIST THAT MAY INDICATE AN OBSERVED RELEASE TO AIR, GROtlNDWATER, SOIL OR SURFACE WATER? ^ YES Q NO Describe: A 1991 Site Investigation (SI) identified the presence of 21 Base Neutral Extractable (BNA) compounds, five Volatile Organic Compounds (VOCs), 12 pesticides and aroclor -1260, a PCB compound. Widespread arsenic contamination above the 10 /xg/L drinking water MCL was found in shallow groundwater. Analytical results from a 2001 Targeted Browndsfield Assessment (TBA) for the western portion of the Site revealed levels of benzo (a) pyrene as high as 5,000 mg/kg in soil and lead in soils at concentrations ranging from 204 mg/kg to 1760 mg/kg Dissolved arsenic was reported in the groundwater at concentrations as high as 1,290 ng/h . B) IF THE ANSWER TO #1 IS YES, IS THERE EVIDENCE OF DRINKING WATER SUPPLY CONTAMINATION OR ANY OTHER TARGET CONTAMINATION (i.e. food chain, recreation areas, or sensitive environments)? • YES ^ NO Describe: C) ARE THERE SENSITIVE ENVIRONMENTS WITHIN A 4-MILE RADIUS OR 15 DOWNSTREAM MILES OF THE SITE? ^ YES Q NO IF YES, DESCRIBE IF ANY OF THE FOLLOWING APPLY: 1) Multiple sensitive environments? A wetland environment exists at the Great Salt Lake which is 10 miles downstream of the site. Approximately 50 miles of wetland frontage occur within the target distance limit (USDI, 1990) . Several duck hunting clubs are located within these wetland areas. 2) Federally designated sensitive environment(s)? Site drainage enters the Great Salt Lake at Farmington Bay Wildlife Refuge. 3) Sensitive environment(s) downstream on a small or slow flowing surface water body? Wetlands are located along the perifery of the Great Salt Lake as described in question 1. D) IS THE SITE LOCATED IN AN AREA OF KARST TERRAIN? Q YES ^ NO Describe: E) DOES THE WASTE SOURCE LIE FULLY OR PARTIALLY WITHIN A WELLHEAD PROTECTION AREA AS DESIGNATED ACCORDING TO SECTION 1428 OF THE SAFE DRINKING WATER ACT? Q YES NO Describe: F) DOES ANY QUALITATIVE OR QUANTITATIVE INFORMATION EXIST THAT PEOPLE LIVE OR ATTEND SCHOOL ON ONSITE CONTAMINATED PROPERTY? Q YES ^ NO B-2 PA Worksheet Page 3 Describe: SITE INFORMATION 1. SITE NAME: Redwood Road Dump ADDRESS: 2000 West Indiana Ave CITY: Salt Lake City COUNTY: Salt Lake STATE: UT ZIP: 84104 EPA ID: UTD980961502 LATITUDE: 40 45 18 LONGITUDE: 111 56 52.5 2. DIRECTIONS TO SITE (From nearest public road): In Salt Lake City, proceed west from Redwood Road and 500 South to 500 South and 2000 West. SITE OWNERSHIP HISTORY (Use additional sheets, if necessary) A. Name of current owner: Salt Lake City Corporation Address: 2001 South State St Suite S4400 City: Salt Lake City County: Salt Lake State: 0 Zip: 84190 Dates: From 1923 To Present Phone: 801-468-2299 B. Name of previous owner: Address: City: County: State: Zip: Phone: C. Name of previous owner: Address: City: County: Dates: From State: 0 Zip: Phone: D. Name of previous owner: Address: Dates: From To To B-3 PA Worksheet Page 4 City: ' County: State: 0 Zip: Dates: From To_ Phone: Source of ownership data: BSHW, 1987 4. TYPE OF OWNERSHIP (Check all that apply): Q Private Q State ^ Municipal Q Federal Q County ^ Other (describe): 5. NAME OF SITE OPERATOR: Val Pope, Director, Salt Lake City Parks Address: 1965 West 500 South City: Salt Lake City County: Salt Lake State: 0 Zip: 84101 Dates: From To Phone: 801-972-7800 BACKGROUND/OPERATING HISTORY 6. DESCRIBE OPERATING HISTORY OF SITE: The Site was the primary landfill for Salt Lake City from 1923 until 1962. The Site is estimated to contain approximately 1,340,000 cubic yards of refuse and fill. The Site was reported to take in household, commercial and industrial wastes. 1-215 was constructed through the center of the Site in 1988 creating an eastern and western refuse pile. The refuse and cover material in the Interstate right-of-way was moved to the east pile during the construction. Thickness of the refuse in the landfill varies between one foot and 29 feet, with the refuse-natural ground interface undulating between elevations of 4216- 4224 feet. Source of information: BSHW, 1987; DERR, 1995; Eckoff, 1977 7. DESCRIBE THE NATURE OF SITE OPERATIONS (property size, manufacturing, waste disposal, storage, etc.): The northern portion of the western landfill is used for the-City's automobile impound lot. Salt and gravel are stored on the southern portion of the western landfill. The eastern landfill is elevated about 10 feet above the natural ground surface and is covered with soil and natural vegetation. The landfill is about 300 yards wide and 400 yards long. Various materials are being stored on a flat area northeast of the eastern landfill. Source of information: DERR, 2010a; Terracon, 1997 B-4 PA Worksheet Page 5 8. DESCRIBE ANY EMERGENCY OR REMEDIAL ACTIONS THAT HAVE OCCURRED AT THE SITE: Chromium and lead contaminated soils were illegally placed on the central part of the eastern landfill some time during December of 1991. The contaminated soils were removed from the landfill in November 1997. Several drums were removed on August 10, 1993 that contained investigation derived wastes from monitoring well installation by EPA contractors during sampling activities in the spring of 1991. Source of information: Terracon, 1997; DERR, 1995 ARE THERE RECORDS OR KNOWLEDGE OF ACCIDENTS OR SPILLS INVOLVING SITE WASTES? • YES NO Describe: Source of information: DISCUSS EXISTING SAMPLING DATA AND BRIEFLY SUMMARIZE DATA QUALITY (e.g., sample objective, age/comparability, analytical methods, detections limits and QA/QC): Samples collected during the 1991 SI and 2001 TBA were collected according to the EPA protocols and analyzed at EPA contract laboratories. Data collected from the site was validated by EPA or EPA contractors. Source of information: DERR, 1992; DERR 2001 WASTE CONTAINMENT/HAZARDOUS SUBSTANCE IDENTIFICATION 11. FOR EACH SOURCE AT THE SITE, SUMMARIZE ON TABLE 1 (attached): 1) Methods of ha,zardous substance disposal, storage or handling; 2) size/volume/area of all features/ structures that might contain hazardous waste; 3) condition/integrity of each storage disposal feature or structure; 4) types of hazardous substances handled. 12.BRIEFLY EXPLAIN HOW WASTE QUANTITY WAS ESTIMATED (e.g., historical records or manifests, permit applications, air photo measurements, etc.): A report entitled "Preliminary Investigations Disposition of Garbage Materials in Abandoned Landfill" (PI) was prepared for the Utah Department of Transportation (UDOT), Salt Lake City, Utah, by Dr. David W. Eckhoff in July of 1977. The investigation found that mixed garbage and refuse had been dumped and burned on the site. Twenty auger holes were drilled into the landfill from which the volume and type of waste was calculated. Source of information: Eckhoff, 1977 13. DESCRIBE ANY RESTRICTIONS OR BARRIERS ON ACCESSIBILITY TO ONSITE WASTE MATERIALS: Both east and west landfills are fenced and access restricted Source of Information: DERR, 2010a B-5 PA Worksheet Page 6 GROUNDWATER CHARACTERISTICS 14. IS THERE ANY POSITIVE OR CIRCUMSTANTIAL EVIDENCE OF A RELEASE TO GROtJNDWATER? ^ YES • NO Describe: In 1991, arsenic was detected at 314 ug/'L, 248 /xg/L and 179 ixg/'h in three of four downgradient wells compared to 19 /xg/L in a background well. Antimony was detected at 34.2 /xg/L in one well and above background concentrations. In 2000, arsenic was detected in many groundwater samples above the MCL of 10 /xg/L. Arsenic was found at 1,2 90 /xg/L and at 1,000 /xg/L in two sample wells located noriih of the Site. Dissolved arsenic was reported in on the western edge of the western landfill at an estimated concentration of 1,170 /xg/L. Other groundwater samples ranged from 2.4 /xg/L to 236 /xg/L Source of information: DERR, 1992; DERR, 2001 15. ON TABLE 2 (attached), GIVE NAMES, DESCRIPTIONS, AND CHARACTERISTICS OR GEOLOGIC/ HYDROGEOLOGIC UNITS tJNDERLYING THE SITE. 16. NET PRECIPITATION: 2 inches Source of information: Ashcroft, 1992 SURFACE WATER CHARACTERISTICS 17. ARE THERE SURFACE WATER BODIES WITHIN 2 MILES OF THE SITE? 1^ Ditches Q Lakes Q Pond Q Creeks Q Rivers Other (Describe) Canals 18. DISCUSS THE PROBABLE SURFACE RUNOFF PATTERNS FROM THE SITE TO StIRFACE WATERS: The Surplus Canal and the City Drain are located in close proximity to the site. The "North Ditch" drains the City property northeast of the eastern landfill. The ditch is piped to a storm drain that flows to the City Drain. The City Drain is located west of 1-215 and just east of the western landfill. The City Drain is the primary groundwater discharge point. The City Drain joins the Sewer Canal approximately six miles to the north. The Sewer Canal eventually discharges into the Great Salt Lake approximately 10 miles downstream of the Site. The Surplus Canal is located approximately 1,000 feet to the west of the Site. The discharge points for the Jordan River, the Surplus Canal and the Sewer Canal into the Great Salt Lake are characterized by freshwater marshes. The discharge points are within the confines of the Farmington Bay Waterfowl Management Area 19. PROVIDE A SIMPLIFIED SKETCH OF SURFACE RtJNOFF AND StJRFACE WATER FLOW SYSTEM FOR 15 DOWNSTREAM MILES (see item #35). B-6 PA Worksheet Page 7 20. IS THERE ANY POSITIVE OR CIRCUMSTANTIAL EVIDENCE OF SURFACE WATER CONTAMINATION? 13 YES • NO Describe: Arsenic was reported in the background City Drain water sample at 61 /xg/L and at 82.8 /xg/L downstream of the Site. Lead rose from the background non-detect concentration to 56.1 /xg/L downstream of the Site. Source of information: DERR, 2 000 21. ESTIMATE THE SIZE OF THE UPGRADIENT DRAINAGE AREA FROM THE SITE: Unknown acres Source of information: 22. DETERMINE THE AVERAGE ANNUAL STREAM FLOW OF DOWNSTREAM SURFACE WATERS Water Body: City Drain Flow: 1 cfs Water Body: Flow: cfs 23. IS THE SITE OR PORTIONS THEREOF LOCATED IN SURFACE WATER? Q YES ^ NO . 24. IS THE SITE LOCATED IN A FLOODPLAIN ^ YES • NO (indicate flood frequency)?. 100 yr 25. IDENTIFY AND LOCATE (see item #35) ANY SURFACE WATER RECREATION AREA WITHIN 15 DOWNSTREAM MILES OF THE SITE: The Great Salt Lake is used for recreational boating and waterfowl hunting. 26. TWO YEAR 24-HOUR RAINFALL: 1.79 Source of information: Ashcroft, 1992 TARGETS 27. DISCUSS GROUNDWATER USAGE WITHIN FOUR MILES OF THE SITE: Seventeen municipal wells from three cities are located within the 4-mile target distance range. All are located east or south of the Site and hydraulically up-gradient. Approximately 4,102 underground points of diversion are located within four miles of the Site. The uses for the large majority are for "domestic" or irrigation purposes and most are upgradient of the Site. The closest downgradient well is approximately 400 yards northwest of the site, north of 500 South and east of the surplus canal. The well is 2 inches in diameter, 280 feet deep and was drilled in 1947. Source of information: DDW, 2010a; DDW, 2010b; DWR, 2010 B-7 PA Worksheet Page 8 28. SUMMARIZE THE POPULATION SERVED BY GROUNDWATER ON THE TABLE BELOW: DISTANCE (miles) POPULATION CUMULATIVE POPUIiATION 0 - i4 50 50 y* - y2 2202 2252 ya - 1 8644 10896 1-2 23053 33950 2-3 33186 67136 3-4 62959 130095 Source of information: DDW, 2010a 29. IDENTIFY AND LOCATE (see item #35) POPULATION SERVED BY SURFACE WATER INTAKES WITHIN 15 DOWNSTREAM MILES OF THE SITE: 0 Source of information: DDW, 2010b 30. DESCRIBE AND LOCATE FISHERIES WITHIN 15 DOWNSTREAM MILES OF THE SITE (i.e., provide Standing crop of production and acreage, etc.): None Source of information: USDI, 1990; UtahFishing, 2010 31. DETERMINE THE DISTANCE FROM THE SITE TO THE NEAREST OF EACH OF THE FOLLOWING LAND USES Description Distance (Miles) Commercial/Industrial/Institutional 0 Single Family Residential 0 Multi-Family Residential 0 Park 1 Agricultural 3 Source of information: DERR, 2010a 32. SUMMARIZE THE POPULATION WITHIN A FOUR-MILE RADIUS OF THE SITE: DISTANCE (miles) POPULATION CUMULATIVE POPULATION 0 - y* 50 50 y* - Va 2202 2252 V4 - 1 8644 10896 1-2 23053 33950 2-3 33186 67136 3 - 4 62959 130095 Source of information: DERR, 2010b B-8 PA Worksheet Page 9 OTHER REGULATORY INVOLVEMENT 33. DISCUSS ANY PERMITS: County: None State: None Federal: None Other: None Source of information: B-9 PA Worksheet Page 10 34. SKETCH OF SITE Include all pertinent features, e.g., wells, storage areas, underground storage tanks, waste areas, buildings, access roads, areas of ponded water, etc. Attach additional sheets with sketches of enlarged areas, if necessary. \ \ Site Boundary ! Landfills I 0.3 015 0 0 3 Mile: Utah Department of Enviromnental Qualit>' Division of Environmental Response and Remedianon Figure 1 Site Location Map Redwood Road Dump Site Salt Lake Countv, tJtah byNeUB.Tiyloi D»te:M08 :!010 B-10 PA Worksheet Page 11 35. SURFACE WATER FEATtH^ES Provide a simplified sketch of the surface runoff and surface water flow system for 15 downstream miles. Include all pertinent features, e.g., intakes, recreation areas, fisheries, gauging stations, etc. Site Boundary 15 Mile Pathway • Mle Markers — Streams 2 1 0 2 Miles Utah Department a[ Environmental Qualit>' Di\ision of Emironmental Response and Remediation Figure 2 Redwood Road Dump 15 Mile Downstream Pathway SdtLiic* Comly, Uuh byNeUBIaylot Dtls:04.13 2010 B-11 h3 4J as as xi m u H o ^ as < nJ I2i O H H H 01 H PI >< H H O g O CO o U o o o 00 n n 12 nJ D. -H U -l-l s >1 u CO 0) u 0) Dl 4J (U (U ^! Dl ni O •H 4J -H X) T) nJ (U [0 D o S 0 X, Xs. ni 4) ft 0) 4J (d c o u tn M-I (U (U fl -H cn u • (U 0) 4J — ni ni 0) u ^: nS +j M.I nl u ft CQ fl O • ^ ^! 4J fl m nl u 4J ^.^ cn •H 0) o e tTl 4-) m ^1 u 0 ni 4J CQ IU CQ B M-I Ti u 0 C TS ;3 0) 0 cn > ^4 fl •H cn -H 4-) u O (U m (U Ti ft fl CO 0) tn CQ ft fl as •H H 4) Ti •H ^; 0 ft U in e 0 m 0 u H CO M-I u as Q) as H U fl U -H m H 4J o CQ m O fl •H xi 4J o 0) 1 m .cl 0) JJ u fl •H M-I >i m 0 CO 4J u CQ fl 0 ^! o w as u O H E-I O H u H o o o w o o ct! Q >^ K H H ^ > O H 0) EH M U ^ o u ra ra H ^ H » EH o o H H >i >i H rH as as 4J 4J m m e B -l-l •H X X 0 0 u u ft ft ft 8< < ro >1 JJ H •H CQ Tl fl fl CQ m •H XJ u •H cn Its CQ XJ as 0 rH XI ft •rl as CQ u T) >1 te as (U m fl •H m U H Tl XJ o fl CQ m 73 fl U m 0 Its r-i br cl TS as MH fl 0 fl -iH •H m Tl +J u as vS tn CQ a H 1 0 CQ u 0) as ft Tl as > fl g fl XJ m -iH 0 nS H u m rt; cn IS XJ as XJ 0 CQ •H u cn as as XJ -H CQ as Xi 4J g o I CQ >i u m CQ CQ IU u IU fl MH •H CQ XJ as as XJ Xi as CQ as Xi H CQ m ro fl U H o O -H OJ XJ tn -H rt; m TS P) TS m as to * CO as rH •rl B I O MH fl •H Xi XJ •H >i XJ •H ^ fl •rl XJ fl O O CQ •rl Tl MH O as XJ flJ ^! XJ MH •H XJ C (U TS H PA Worksheet Page 14 • REFERENCES Ashcroft, G.L., D.T. Jensen, and J.L. Brown, 1992, Utah Climate Eckoff, David W., 1977. Preliminary Investigations Disposition of Garbage Materials in Abandoned Landfill. (Submitted to Utah Department of Transportation) Salt Lake City Parks and Recreation, 2010, personal conversation with a Val Pope, Director, March 22, 2010 Terracon, 1997, Soil Removal and Sampling Report, Tool Design Engineering and Manufacturing Inc. Indiana Landfill Site Salt Lake City, Utah Terracon Project Number 61967065, December 4, 1997 U.S. Department of the Interior (USDI) (1990), Fish and Wildlife Service, National Wetlands Inventory Maps of Salt Lake City North, Utah, 7.5 minute quadrangle. Utah Division of Environmental Response and Remediation, 1992. Analytical Results Report, Redwood Road Dump Site, Salt Lake City, Utah, UTD980961502 Utah Bureau of Solid and Hazardous Waste, 1987. Preliminary Assessment, Redwood Road Dump, Sah Lake City, Utah, UTD980961502 Utah Division of Drinking Water (DDW) (2010a) geographic information system database reviewed April 12, 2010 Utah Division of Drinking Water (DDW) (2010b) public water system database reviewed April 12, 2010 Utah Division of Environmental Response and. Remediation (DERR), 2001, Targeted Brownfields Assessment and Analytical Results Report Utah Division of Environmental Response And Remediation Western Portion of the Redwood Road Dump and the Salt Lake City Road Maintenance and Automobile Impound Lot, Salt Lake County, Utah William L. Rees, September 5, 2001 Utah Division of Environmental Response and Remediation (DERR), 2001 Analytical Results Report, Redwood Road Dump Salt Lake City, Utah, January 14, 1992 Utah Division of Environmental Response and Remediation (DERR), 1995, Site Inspection Prioritization Redwood Road Dump Site, Salt Lake County, Utah, UTD980961502, September 27, 1995 Utah Division of Environmental Response and Remediation (DERR), 20l0a, Site Visit for Redwood Road Dump, March 9 and 22, 2010 Utah Division of Environmental Response and Remediation (DERR); 2010b, Census 2000 data, GIS layer name: pop_blkgrp.shp Utah Division of Water Rights (DWR); 2010, Water Rights Points of Diversion Data. Utah State Geographic Information Database (GIS) layer name: wrpad.shp. Accessed April 12, 2010 Utah Division of Wildlife Resources (DWLR), 2010, Farmington Bay Waterfowl Management Area http://wildlife.utah.gov/habitat/farmington_bay.php accessed April 12, 2010 UtahFishinlnfo website: http://www.utahfishinginfo. Accessed April 14, 2010 B-14 APPENDIX C REDWOOD ROAD DUMP UTAH DEPARTMENT OF TRANSPORTATION 1977 PRELIMINARY INVESTIGATION BOREHOLE DATA TABLE AND UTAH DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION 1991 SITE INVESTIGATION SELECTED FIGURES AND DATA TABLES FIGURES LIST OF FIGURES Figure 5 Sample Location Map Redwood Road Dump Site 1991 Site Investigation Map Figure 5a Approximate Sample Location Map 1991 Site Investigation Redwood Road Dump Site 2008 Satellite Photo Overlay Figure 5b Soil and Groundwater Arsenic Concentrations 1991 Site Investigation Redwood Road Dump Site of the 2008 Satellite Photo Overlay Figure 6 Groundwater Map Redwood Road Dump Site • Monitor Well Location X Sample Location UTAH DEPARTMENT OF HEALTH BUREAU OF ENVIRONMENTAI. RESPONSE AND REMEDIATION Sample Location Map Redwood Road Dump Site Figure 5 TH Date 6/11/91 Scale Not to Scale • Soil Sannple • Monitoring Well • Surface Water/Sediment Landfills L . . 130 65 0 130 Meters Utah Department of Environmental Quality Division of Enviromnental Response and Remediation Figure 5a Approx. Sample Location Map Redw^ood Road Dump Site 2008 Satellite Photo Overlay Salt Lake County, Utah by: Neil B. Taylor Date: 04/08/2010 I Soil Sample Monitoring Well I Landfills 400 200 0 400 Feet Utah Department of Enviromnental Quality Division of Environmental Response and Remediation Figure 5b Soil and Groundwater Arsenic Concentrations Redwood Road Dump Site Salt Lake County, Utah by: Neil B. Taylor Date: 04/08/2010 A222 — — Groundwater Contour (shallow) • Groundwater and Suface Water Flow Direction Monitor Well Location • —42" Sewer Line UTAH DEPARTMENT OF HEALTH BUREAC; OF ENVIRONMENTAL RESPONSE AND REMEDIATION Groundwater Map Redwood Road Dump Site Figure 6 By TH Date 6/11/91 Scale Not to Scale (based upon monitor well data and Portland Cement 2 S 3 Sites potentiometric maps) TABLES LIST OF TABLES Table 1 1977 Landfill Borehole Explosive Gas Concentrations Table 2 1991 Site Investigation Monitoring Well Groundwater Parameters Table 3 1991 Site Investigations Sampling Results Organic Data Results for Groundwater and Surface Water Samples Table 4 1991 Site Investigations Sampling Results Inorganic Analyses for Groundwater and Surface Water Samples Table 5 1991 Site Investigations Sampling Results Organic Analyses for Soil and Sediment Samples Table 6 1991 Site Investigations Sampling Results Inorganic Analyses for Soil and Sediment Samples TABLE 1 1977 LANDFILL BOREHOLE EXFLOSrra CAS CONCENTRATIONS * ALL VALUES ARE PERCENT BY VOLUME PROBE NO. 28 April '77 3 May '77 5 M.y •• G-U-5-6 N.R.** 0 0 G-U-IO-U N.E. 0.3 0 G-2A-5-6 N.R. 0 0 G-Z/-10-11 H.R. 0 0 G-3A-5-6 N.R. 0 0 G-3A-10-11 N.E. 0 T<1 C-3A-15-16 N.R. 6.0 11 A-4A-5-6 N.R. 0 0 G-4A-10-11 N.R. 0 0 G-4A-1A-15 N.R. 0 0 G-5A-5-6 N.R. 0 0 G-5A-10-11 N.R. 0 0 G-7A-5-6 N.R. 0 0 G-7A-9-10 N.R. 0 0 G-lB-4236 6.7 2.25 9 G-lB-5-6 T< 1 0 0 G-2B-5-6 0 0 0 G-2B-10-11 1-2 2.25 1.5 G-2B-15-16 6 0 5 G-3B-5-6 0-3 0 0 G-3B-10-11 8 0 0 G-3B-15-16 18 9 15 G-4B-5-6 20 19 17 G-4B-10-11 20 17 20 G-4B-15-16 20 17 27 G-5B-1.5 + 6.5 N.R. 0 0 G-5B-10-11 N.R. 0 0 G-6B-5-6 N.R. 0 0 C-6B-10-11 N.R. 0 0 G-7B-4235 N.R. 0 0 G-7B-5-6 N.R. 0 0 G-8B-5-5 1/2 N.R. 0 0 G-lC-5-6 N.R. 0 0 G-lC-10-11 N.R. 0.7 5 G-2C-5-6 N.R. 0 0 C-2C-10-11 N.R. 0.8 0 G-3C-5-6 N.R. 0 0 C-3C-10-11 N.R. 1.8 3 G-3C-15-16 N.R. No Probe No Probe G-5C-5-6 0 0 0 G-5C-10-11 <1 0.7 0.7 G-6C-5-6 N.R. 0 0 G-6C-9-10 N.R. 0.4 0 • Lower Explosive Limit Is approxltaate ly U percent No Reading Taten VI C3 ca a. u OJ CO C o >-l o VI >. a, CQ < C o '5 o o C3 > c ON ON rt C o O C Ol d o u c OJ e •3 LO o 3 TJ C 3 O G 4-1 c o o 4-1 c e (0 in < CO ir 111 1- i LLI < 5 Q o Z O < 05 w (0 cL §1 §^ §! u- o W 9 !:l LU a: CN CM W 1- _J W LU a: o z CO UJ _I CD < 1- < < o I-co LU > z LU H CO (3) CO LU _l CL < CO a: 111 UJ o < cc CO Q 2 < UJ O CU CD CU O u_ CO UJ CO > 3 o O CO CO CL E Q •a 03 o a: T3 O O •a 0) OH < o z < CD DH O r5 9 § Q 9 5 "? Q 9 § Q a: 9 (O 9 I Q DC in 9 5 z I • ce: 9 Q Q cr: CM 9 Q cr: Q CO o CO in o CO CM m oo CO CO CM O CM V CO T— OO CM CM Tf O) CM CO V CO V 0) CL E ID 03 E 3 C E o lri V o o 00 in m o o Tf o o (O o" CO CM od CJ) ID Q. Q. O o o oo o CO o o o CM" o CM O o o o" CM Tf CO oo in E (A I 1 5 £ i if a: E IK O CO H _1 CO lU DH O < CO z g < CD H CO LU > z LU H CO T— cn cn D Q ° -I 3 D XI ra o a: < ~ o < o n 9 UJ •9 Q a: lU Ul I Q ir: 9 Ul Q IK: O «9 Q ft: O) 9 o <? o a: o o a: 9 o <? Q 9 o <? o a: 9 o •? o a: o o • 9 o «? 9 o «? a a: m o a, HI Q O ft) •B f ^ 3 Ift 3 i lii fl CO Q. E 3 D •o CO o DH T3 O O T3 CU DH CO LU < CO x: h-z 5 UJ . >^ .4-' Q i LU O CO O Q ^ CO O CO W CL O 3 LL Q CO rj m g DH T3 O O 5 T3 O <s> DH < CD DH O o o 8 CO N CO H _l CO LU DH CD < CD CO LU Z 0) -a d 3 "c CO l 0) at e o ow E « es E .S2 c o V CO c Q. w 0) E 03 o n 5 (A CO .5 V > "co o c o u T3 (U E o TJ c 0) C O 0) •D O •D la t e ^ un t o CD o o 3 E IS S o ra < o CO UJ > UJ H CO cn cn 5 ^ (0 CL CJ) Ci E Q. = « B to V- C T- 0) o > CM >• ^ • Ul (2 D o o c 2| 2^ <D t5 « 2 c o 3 o APPENDIX D UTAH DIVISION OF ENVIRONMENTAL RESPONSE AND REMEDIATION TARGETED BROWNFIELDS ASSESSMENT ANALYTICAL RESULTS REPORT WESTERN PORTION OF THE REDWOOD ROAD DUMP AND THE SALT LAKE CITY ROAD MAINTENANCE AND AUTOMOBILE IMPOUND LOT SELECTED FIGURES AND DATA TABLES LIST OF FIGURES Figure 1 Approximate Sample Location Map Redwood Road Dump Site 2001 TBA, 2008 Photo Figure 4 Benzo (a) Pyrene Concentrations in Soil Redwood Road Dump 2001 TBA Map Figure 4a Lead Concentrations in Soil Redwood Road Dump 2001 TBA Map Figure 5 Dissolved Arsenic in Groundwater Redwood Road Dump TBA FIGURES • A LI J TBA Soil Sample TBA Trench TBA Surface Water Sample TBA Soil/Groundwater Landfills 320 160 320 Feet Utah Department of Envirormiental Quality Division of Environmental Response and Remediation Figure 1 Approx. Sample Location Map Redwood Road Dump 2001 TBA, 2008 Photo Salt Lake County, Utah by: Neil B. Taylor Date: 04/08/2010 CD a E E o o vs a CD E E o CJ 0-4 ft 150 J RRD-11 • 7-9 ft 430 U RRD-12 • 6-8 tt 400 U RRD-13 •6-Bft 370 U 200 400 600 flOO Feet LEGEND Roads Soil Sample Location 5000 - Benzo (a) pyrene concentration (ug/kg) 7 - 9 ft - Deptti of Soil Sample NS - Sample not collected from this location U - Laboratory Quantitation Limit J - Estimated Value Site Location Utah Department of Environmental Quality Division of Environmental Response and Remediation Figure 4 Benzo (a) Pyrene Concentrations in Soil Redwood Road Dump TBA By: B. Rees Date: April 30.2001 500 South (0 0) E E o o CO S Ui c o -J <ss a RRD-7» 7-11ft 16.9 J SB-1 •NS RRD-10 168 J 0-4 ft RRD-8 • 7-9 ft 25.9 J RRD-9^T-4 2-6 ft 57.1 J RRD-1U 7-9 ft 28.7 J RRD-12 6-8 ft 14-2 J RRD-13 • 6.8ft 19.9 J 200 400 600 800 Feet LEGEND Roads Soil Sample Location 28.7 J - Estimated Lead Concentration (mg/kg) 7 -9 ft - Depth of Soil Sample NS - Sample not collected N Site Location Utah Department of Environmental Quality Division of Environmental Response and Remediation Figure 4a Lead Concentrations in Soil Redwood Road Dump TBA By: B. Rees Date: May 1, 2001 Roads • Groundwater Sample Location 178 J - Dissolved Arsenic (ug/L) NS - Sannple not coiiected J 1 * Site Location Figure 5 Dissolved Arsenic in Groundwater Redw/ood Road Dump TBA By: B. Rees Date: April 27, 2001 TABLES E <n « < t) — |i » e u m « § « 1 = " B ~ (B F «8 H-It = 5 S -a O (d •n V cc _1 (fl .a •5 .0 „ I? IS i ll E 3 S 3 I 8 S •c 3 (A 2 s & .s S o s & 6 s I 5 Q. _ So .s I B 8 s o *• 5 o « £ I o « ? o ? •y • * Is s 5 S 15 5 n I « I CL Its I 8 5 •I S i 1 « -) 3 z DC rf Tables VOC* in Surfica Wat«r SLC Redwood Road Dump Torgsted Brownlieldi AsseBanwnt Sample Number N/A RRD-SW>1 RRO-SW-2 nRD-SW-3 RRD^W-4 RRD^W'S Trattic Number N/A HX437 HX435 HX434 HX43a HX439 Sempic Locetion N/A Southem portion ol canal Central portion ot canal Norihem portion ol canal Northern portion ot wetlands DupUcate ol SW-4 Sample Date N/A 6/23/2000 8/23/2000 6/23/2000 6/23/2000 6123/2000 Sample Type MCL or EPA Hculon in Tap Water Screening Criteria Surtice Water Surlace Wtter . Surface Water Surface .Water Surtece Water Cas No. Analyte nan. ng/L Q ug/L 1 Q UQfl. Q MQ/L 1 Q iigiL Q 75-71-8 Didilorodifluorom ethane 350 10 U 10 j u 10 u 10 j U 10 u 74-87-3 Chloromethane Z.1 10 ! u 10 1 u 10 u 10 1 u 10 u 75-01-4 Vinvl Chloride 2 10 u 10 ' u 10 u 10 1 u 10 u 74-B3-9 Bromamethans 8.5 10 u 10 u 10 u 10 1 u 10 u 75-00-3 Chloroethane 3.6 10 1 u 10 1 u 10 u 10 u 10 : u 75-89-4 Tftchlorotiuoromethane 1,300 10 u 10 u 10 u 10 ! u 10 ! u 75-35-1 1,)-Dichtofoe(tiene 7 10 u 10 ! u (0 u 10 1 u 10 ! u 76-13-1 TnchlorotriHjoroethane ss.ooo 10 i u 10 i u 10 u 10 ! u 10 r U 67-64-1 Acetone 610 10 1 12 1 10 u 10 u 10 u 75-15-0 Carbon Diaulfide 1,000 10 1 u 10 1 u 10 u 10 u 10 u 79-20-9 Melhvl Acetate 6,100 10 i u 10 1 u 10 u 10 1 u 10 u 75-09-2 Methylene Chloride 4.1 10 i u 10 i u 10 u 10 u 10 u 156-BM lrans-1.2-Dtchloroethene too 10 ) u 10 u 10 u 10 u 10 : u 1B34-04-4 Mathvl Tert-Butvl Ether 8,300 10 u 10 u 10 u 10 u 10 u 75-34-3 1,1-Dichloroethane 800 10 u 10 u 10 u 10 u 10 u 156-59-2 cis-1,2-Dichloroethene 70 10 u 10 \ u 10 u 10 u 10 u 7B-B3-3 2-Bu1anone <MEK| 1,900 10 ; u to u 10 u 10 u 10 u 67-68-3 Chlorotoim 0.1S o.e 1 J 0.4 J 10 u 10 u ID u 71-55-6 1,1,1 -Trichloroethane 200 10 1 u 10 u 10 u 10 _ u 10 u 110-82-7 Cvdohexane 180,000 10 1 u 10 u 10 u 10 1 u 10 u 56-23-5 Carton Telrachioriile 5 10 1 u 10 u 10 u 10 u 10 u 71-43-2 Benzene 5 10 1 u 10 u 10 u 10 u 10 u 107-06-2 1,2-Dlchloroe thane 5 10 j u 10 u ID U 10 u 10 u 79-01-6 TrichlorDelttene (TCE) 5 10 i u 10 u 10 u 10 u 10 u 108-87-2 Melhylcvdoheiaria 6.300 10 u 10 u 10 . u 10 u 10 u 7B-87-5 1,2-DlchlDrDpro|)ane 5 10 u 10 V 10 u 10 : u 10 u 75-?7-4 BromodMMorcHnelhane 0.17 10 u 70 .' U JO 1 u to u 10 u 10061-01-S cis-l, 3-Dichloropropene 10 u 10 ' u 10 : u 10 u 10 1 u 108-10-1 4-Meth¥l-2-PenlanonB (MIK) 140 10 u 10 i u 10 u 10 u 10 ; u 10a-BB-3 Toluene 1,000 .10 u 10 i u 10 u 10 1 u 10 , u 10061-02-6 ttane-i ,3-Dichloropropene 10 1 . u 10 i u 10 u 10 u 10 u 79-00-5 1,1,2-Trichloroethane s 10 u 10 u 10 ! u 10 u 10 u 127-18-4 TelratWoroettiene (PCE) 5 10 i u 10 u 10 u 10 u , 10 u 591-78-8 2-He«anone 1,500 10 i u 10 u 10 u 10 u 10 u 124-18-1 Dibromochloromethane 0.13 10 : u 10 ; u 10 u ID ; u 10 u 106-93-4 1.2-Dlbromoett)ane 0.0OO75 to ; u 10 u 10 u 10 ; u 10 u 108-9O-7 Chlorobenzene 110 10 u 10 u 10 ! U 10 i u 10 u 100-41-4 Ethylbenzene 700 10 u 10 u 10 u 10 j u 10 u 1330-20-7 Xylene (Total) 10.000 10 u 10 ; u 10 u 10 ' u 10 100-42-5 Styrene too 10 u 10 1 u 10 u 10 1 u 10 1 u 75-25-2 Bromotorm (trt>ramomettttne) 8.5 10 u 10 ! U 10 { u 10 u 10 u 98-62-8 IsoproDvlberusne 10 u 10 ; u 10 • u 10 u 10 u 79-34-5 1,1.2,2-Tetrachloroethane 0.41 10 i u 10 u 10 u 10 tJ 10 u 541-73-1 1,3-Dichlorobenzene 5.5 10 ; U 10 u 10 u 10 u 10 u 106-48-7 1,4-Dchlorabenrene 0.47 10 i u 10 u 10 u 10 u 10 u 95-50-1 1,2-DichlorobenzBna 550 10 j u 10 u 10 i U 10 u 10 1 u 96-12-8 1,2-Dibrrano-3-cblwDDroBBne 0.047 10 u 10 u 10 u 10 u 10 u 120-82-1 1,2,4-Trichlorobenzene 70 10 ; u 10 u 10 1 u 10 u 10 u Results equal lo or greater than MCLs or EPA. Region III Tap Water Screening crHxia are stxiwn In bold. bQfl - below g'ouno aurioce NA . Not ApplicaUa Q - Quallllar ug/L • pani per tihian J - The aesociaied numerical value It an eilimsted quanlily because the Oualitv Control cmeria wars not msi. UJ • Ttw raported amount B estimatBd because Qjallly Coniral cnierla iwora nol met Element or compound was noi detected. NJ - Tlie analysis inrficales Itie presence oi an analyla lhal haa been 'lentaUvely identified' and Iiie associeied numencal value represents Its approximate concentration. R - Reported value Is "rejecloo." U - Tile anaiyla waa not detectod aErave Ihe lobof atory quantilalion llmil. Page 1 ol 1 Tables SVOCs in Surface Water SLC Redwood Road Dump Targeted Brownfields Assessntent Sample Number N/A RFID^W-2 RRO-SW-3 RRD-SW-4 RRD-SW-5 Traffic Numb«r N/A HX437 HX435 HX434 HX43B HX439 Sampte Location N/A Southern ponion ol canaf Central portion ol canal rtortttern portion of canal Northem portion of wetlartds Duplicate of 3W-4 Sampla Date N/A e«3/2000 6/23/2000 6/23aM0 6/23/2000 6/23/2000 Sample Type MCL Or EPA Region III Tap Water Screening Criteria Surface Water Surface Waler Surface Water Surface Water Surface Water Gas No. Analyte Q Q Q jig/L 0 jig/L Q 1CX)-52-7 Benzaldehyde 3.700 10 UJ 10 UJ 10 UJ 10 UJ 10 UJ 10e-95-2 Phenol 22,000 to u fO u 10 u 10 u 10 U 111-44-4 b*s(2-Ch1oroethyl) ether 0.0096 10 u 10 u 10 u 10 u 10 u 95-57-S 2-Chlorophenot 30 10 u 10 u 10 u 10 u. 10 u 95-48-7 2-Methylphenol 1.B00 10 u 10 u 10 u 10 u 10 u 10B-60-1 2,2'-oxybi9{1-Chloropropane) 10 u 10 u 10 u 10 u 10 u 98-86-2 Acetophanone 0.042 10 u 10 u 10 u 10 u 10 u 106^4-5 4-Methylphenol 180 10 u 10 u 10 u 10 u 10 u 621-64-7 N-Nitroao-di-rt-propytamine 10 u 10 u 10 u 10 u 10 u 67-72-1 Hexachloroethane 10 u 10 u 10 u 10 u 10 u 98-95-3 Nitrobenzene 3.5 10 u 10 u 10 u 10 u 10 u 78-59-1 Isophorone 70 10 u 10 u 10 u 10 u 10 u 88-75-5 2-Nitrophetiol 10 u 10 u 10 u 10 u 10 u 105-67-9 2,4-DimelhylphenoI 730 10 u 10 u 10 u 10 u 10 u 111-9M bis(2-Chloroeihoxy) methane 10 u 10 u 10 u 10 u 10 u 1ZO-B3-2 2,4-Dichlorophsnol 110 10 u 10 u 10 u 10 u 10 u 91-20-3 Naphthalene 65 10 u 10 u 10 u IQ u 10 ' u 106-47-8 4-CNoroaniline 150 10 u 10 u 10 u 10 u 10 u 67-66-3 Hexachlorobutadiene 0.86 10 u 10 u 10 u 10 u 10 u 105-60-2 Caprolactam 18,000 10 u 10 u 10 u . 10 u 10 u S9-50-7 4-Chloro-3-melhy1pheno) 10 u 10 u 10 u 10 u 10 u 91-57-6 2-MethylnepMhalene 120 10 u 10 u 10 u 10 u 10 u 77-47-4 Hexachlcfocyclopenladiene 260 10 u 10 u 10 u 10 u 10 u 86-06 2 2,4,6-TrichlorDphenol 6.1 10 u 10 u 10 u 10 u 10 u 95-95-4 2.4,5-Trichlorophenol 3,700 25 u 25 u 25 u 25 u 25 u 92-52-4 1,1-Biphenyt 10 u 10 u 10 u 10 u 10 u 91-58-7 2-Chloranaphthalene 10 u 10 u 10 u 10 u 10 u 88-74-4 2-Nitroaniline 25 u 25 u 25 u 25 u 25 u 131-11-3 Dimethylphlhalala 370.000 10 u W u 10 u to u 10 u 606-20-2 2,S-Din'itrcitcAuen« 37 10 u ID u 10 u 10 u 10 . u 206-96-8 Acenaphthylene 10 u 10 u 10 u 10 u 10 u 99-09-2 3-NltroBnillne 26 u 25 u 25 u 25 u 25 -u B3-32-9 Acenaphthene 370 10 u 10 u 10 u 10 u 10 . u 51-28-5 2,4-Dinitrophenol 73 25 u 25 u 25 u 25 u 25 u 100-02-7 4-NitrophenoI 290 25 u 2S u 25 u 25 u 25 u 132-64-9 Dibenzofuran 24 10 u 10 u 10 u 10 u 10 u 12M4-2 2,4-Dinilrotoluene 73 10 u to u 10 u 10 u 10 u 84-66-2 Diethylphthalate 29.000 10 u 0.4 J 10 u 10 u 10 u B6-73-7 Fluorene 240 10 u 10 u 10 u 10 u 10 u 7005-72-3 4-Chloropheny(-phenylether 10 u 10 u 10 u to u 10 u 10001-6 4-Niln^aniline 25 u 25 u 25 u 25 u 25 u 534-52-1 4,6- Dinitro-2-methylphenol 25 u 25 u 25 u 25 u 25 u 86-30-6 N-nitrosodphenylamine (1) 10 u 10 u 10 u 10 u 10 u 101-55-3 4-Bromophanyl-phenylrther 10 u 10 u 10 u 10 u 10 u 118-74-1 Hexachlorobenzene 0.042 10 u 10 u 10 u 10 u 10 u 1912-24-9 Atrazine 0.3 10 UJ 10 LtJ 10 •J 10 UJ 10 UJ 87-86-5 Pentachlofoptiend 0.56 25 u 25 u 25 u 25 u 25 u 85-01-8 Phenanthrene 10 u 10 u 10 u 10 u 10 u 120-12-7 Anlhracens 1.800 10 u 10 u 10 u to u 10 u 86-74-8 Carbazole 3.3 10 u 10 u 10 u 10 u 10 u 84-74-2 Di-n-butytphthalata 10 u 10 u 10 u to u 10 u 206-44-0 Fluoranthene 1.500 10 u 10 u 10 u 10 u to u 129-00-0 Pyrene 180 10 u 10 u 10 u 10 u 10 u 85-68-7 6uty)t>enzyl[^thalate 7.300 10 u 10 u 10 u 10 u 10 u 91-94-1 3,3' -Dichlorotwnzidine 0.15 10 u 10 u 10 u 10 u 10 u 56-55-3 Benzo (a) anthracene 0.092 to u 10 u 10 u 10 u 10 u 218-01-9 Chrysene 9.2 10 u 10 u to u. 10 u 10 u 117-81-7 bis (2-Ethylhexyl) phttialate 4.8 10 u 10 u 10 u 10 u . 10 u. 117-84-0 Di-rvodyiphthalale 10 u 10 u 10 u 10 u 10 u 205-99-2 Benzo (b) fluoranthene 0092 10 u 10 1 u 10 u 10 u 10 u 207-08-9 Benzo (k) fluoranthene 0.92 10 u 10 u 10 u 10 u 10 u 50-32-8 Benzo (a) pyrene 0.0092 10 u 10 u 10 u 10 u 10 u 193-39-5 Iriderio (l,2,3'-"c(J)"pyr6he~ 10 u 10 u 10 u 10 u - 10 u 53-70-3 Dtbenz (a, h) anthracene 0.0092 10 u 10 u 10 u 10 u 10 u 191-24-2 Benzo (g,hj) peryler>e 10 : u to u fO u 10 u to u Hasults equal to or greater than MCLs or EPA, Region III Tap Water Screening criteria are shown in bold. bgs - below ground surface NA - Not /Applicable O - OuaRlier ug/L - parts per billion J • The associated numeirTcal VBIUB is an estimaled quantity because the Ouality Control critwia were nol rnet. UJ - The reported amount is estimated because Oi«Jity Control criteria were not met. Element or compound was not detected. NJ - The analysis indicales the presence ot an analyte that has been 'twilatively identified' and the associated numerical value represents ils approximate concentration. R - Reponed s^lue is 'rejected.' U - Tt>e analyte was not detected above Itte laboratory ^lantitation BmiL Page 1 of 1 I I I I I I I I I I I I I I I I I I I V I CM as _o Ifl « a, "S m o (L c o a E c »> C M 5 * O ei TO O Ul •o .2 § i •o s o "g o ? a- n » * 8 V s a ' a I- '; = s ii at" iS £ 3 o c S S g s e § 3 % •5 o o. g ^ a. ll i i. S 5 i i I a s S. 8 I I ? l-l. •{. J 11 -> 3 Z IT 3