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Home My WebLink AboutDSHW-2018-008773 - 0901a068808cbde9WASATCH IJVIRONN4Lin'AL Div of Waste Management and Radiation Control AUG 2 4 2018 --D54v-zoo-o(90773 Mr. Raphael Mordo June 7, 2018 2996 Vista Circle Project No. 1659-032B Bountiful, Utah 84010 SUBJECT: Phase II Environmental Site Assessment - Subsurface Investigation Clearfield Tyre Pros 1275 South 1000 East Clearfield, Utah Wasatch Environmental Inc., (Wasatch) has completed subsurface investigation activities at the Clearfield Tyre Pros property (Site), located at 1275 South 1000 East, Clearfield, Utah. The investigation activities consisted of advancing six soil borings to facilitate the collection of groundwater samples, and the collection of two sub-slab soil gas samples. BACKGROUND Wasatch prepared an April 13, 2018, Phase I Environmental Site Assessment for the subject property. During the completion of the Phase I Environmental Site Assessment, Wasatch identified the following: • Staining and pooled liquids were observed around the aboveground storage tank (AST) in the lube shop. The lube shop basement floor is constructed of concrete, and several cracks in the concrete were observed during the site visit that would provide a direct pathway for contaminants to enter the subsurface. • Five in-ground hoists were observed within the auto shop building. These hoists have likely been present since the original development of the building (1973) and have not been appropriately decommissioned. It has been our experience that there is a high likelihood of releases from in- ground hoist systems. • All floor drains within the buildings are connected to one of two oil/water separators (OWSs) located outside each of the buildings. The floors of the auto shop and lube shop are washed routinely and receive wash water that includes spilled automotive fluids. The OWSs were inspected and an odor of automobile fluids was noted. The OWSs are reportedly cleaned "every couple of years" and management practices prior to 1999 are unknown. At the time of our site visit, the interior of the OWSs were inspected and there was a distinct petroleum odor. It is our experience that there is a high likelihood of releases from long-term use of OWSs that have received hazardous substances or petroleum products. • The basement of each building is equipped with a sump pump that reportedly discharges groundwater to the storm drains along 1000 East. The subject property owner stated he disconnected the groundwater sump in the lube shop basement because of concerns that the sump could collect oil from lube operations. At the time of our site visit, a dark, thick, oily sheen was observed in this sump. Oil that enters this sump would discharge directly to the subsurface. OBJECTIVES The current scope of work was intended to evaluate the Site for environmental impacts related to the past uses of the property. The environmental sampling activities were not intended to fully delineate all potential releases to the Site. 2410 WEST CALIFORNIA AVENUE • SALT LAKE CITY, UTAH 84104 PHONE (801) 972-8400 • FAX (801) 972-8459 Website: wwwwasatch-environmentaLcom • e-Mail: wei@wasatch-environmental.com SITE INVESTIGATION ACTIVITIES Wasatch conducted the following investigative activities at the facility as depicted on Figure 1: • Two soil borings (GP-1 and GP-6) were completed inside of the Auto Shop Building near the in- ground hoists and trench drains, in areas of staining and potential releases through cracks. • Two soil borings (GP-2 and GP-3) were completed outside of the Lube Shop Building and Auto Shop Building next to the OWSs where distinct petroleum odors were observed. • One soil boring (GP-5) was completed outside of the Auto Shop Building adjacent to the sump location where potential releases to the subsurface could occur. • One soil boring (GP-4) was completed outside of the Lube Shop Building near the concrete drain and hydraulically down-gradient of the trench drain. • Two soil gas samples (SG-1 and SG-2) were completed in the basement of the Lube Shop Building near staining and pooled liquids around the AST and two basement sumps. Additional sampling locations were considered in the Auto Shop Building; however, access limitations were present in the areas of the northeast and southeast hoists in the Auto Shop Building, which prohibited drilling activities. Additionally, immovable automobiles were located in the south-central and southwest garage bays of the Auto Shop Building which prohibited drilling activities in these areas. FIELD METHODOLOGY Soil Sampling On May 16, 2018, Wasatch Field Geologist, Stephen Strehl, directed the completion of six soil borings (GP-1 through GP-6), using direct-push drilling techniques, to evaluate soil and groundwater conditions at the Site. Direct Push Services (DPS) advanced the soil borings using a GeoProbe Model 7822 DT. The boring locations are shown on Figure 1. Each of the soil borings were advanced to a depth of 20 feet below ground surface (bgs). Soil samples from the borings were collected using 5-foot long, by 1.5-inch diameter, discrete interval push samplers equipped with disposable polybutyrate liners. Drill rods were decontaminated between each soil boring. The soil cores were field logged by an experienced geologist. The field logging included a description of color, consistency, odor, staining, and soil type based on the Unified Soil Classification System. The soil cores were screened in the field with a photoionization detector (PID) equipped with a 10.6 electron volt (eV) lamp. The PID was calibrated with a 100-parts per million (ppm) isobutylene standard calibration gas. The PID is utilized to identify soils which may have been impacted by volatile organic compounds (VOCs) such as those found in petroleum fuels and some solvents. Following the completion of sampling activities, the borings were backfilled with bentonite pellets, hydrated, and patched with asphalt or concrete to match the existing surface at each boring location. Groundwater Sampling Groundwater samples were collected from each of the soil borings (GP-1 through GP-6). The boring locations are shown on Figure 1. Groundwater samples were collected using stainless steel well-points and a peristaltic pump. Groundwater was initially purged from the borings to reduce the turbidity of the samples; however, groundwater remained turbid, resulting in turbid samples. Groundwater samples were analyzed for VOCs by U.S. Environmental Protection Agency (EPA) Method 8260C and total recoverable petroleum hydrocarbons (TRPH) by U.S. EPA Method E1664B-SGT. Groundwater samples collected for Wasatch Environmental Inc. Page 2 VOCs were dispensed into 40-milliliter capacity, glass vials with Teflon® septa caps. The vials were supplied by the analytical laboratory and contained several drops of hydrochloric acid as a preservative. The vials were filled slowly until a meniscus formed at the top of each vial, then each vial was sealed with a septa cap. This procedure eliminates headspace within the vials and minimizes the loss of volatiles. Groundwater samples collected for TRPH were dispensed into single 1.0 L, unpreserved, amber glass jars. The sample vials/bottles were each labeled with the sample location, sample identification, date and time of sample collection, and requested analysis. The samples were placed in a cooler with ice and transported under chain-of-custody protocol to American West Analytical Laboratory (AWAL) for analysis. Sub-Slab Soil Gas Sampling Wasatch personnel collected sub-slab soil gas samples from two locations (SG-1 and SG-2) beneath the floor slab in the basement of the Lube Shop Building where staining was observed near the ASTs and sump pumps. The sample locations are shown on Figure 1. The technique for collecting the soil gas sample began by checking for a vacuum in the 6-liter Summa canister supplied by ALS Laboratories (ALS). The initial vacuum was recorded on the chain-of-custody form provided by ALS. A %-inch hole was drilled through the concrete slab at the sampling location using a percussion hammer drill to a depth of approximately 1% feet below the concrete slab. A brass vapor pin equipped with a silicone sleeve was inserted into the hole and a bentonite paste seal was placed around the silicone sleeve and vapor pin. Next, tubing was attached to the vapor pin. The bentonite paste was allowed to set for a minimum of %-hour while the hole equilibrated. A sample regulator equipped with a flow restrictor was provided by ALS for the sample. A sample regulator was attached to the 6-liter Summa sample canister. The tubing from the vapor pin was then attached to the sample regulator and the valve on the sample canister was opened. The vacuum gauge on the flow restrictor was monitored, with decreasing vacuum indicating that soil gas was being collected into the sample canister. The sample was collected for approximately %-hour. Alcohol pads were placed near the drilled hole and near the Summa canister to check for leaks. The final vacuum was recorded on the chain-of-custody form provided by ALS. The valve on the sample canister was then closed, sample regulator removed, and brass cap tightened to the inlet of the sample canister. The vapor pin was removed from the hole and the hole was filled and finished with concrete. The sample canister was labeled with the appropriate sample location, as well as initial and final vacuum readings. Chain-of- custody documentation was completed, and the samples were delivered to ALS for analysis of VOCs using U.S. EPA Method TO-15. FIELD OBSERVATIONS AND LABORATORY ANALYTICAL RESULTS Soil Samples Soils at the Site generally consist of fill, gravelly sand (SW), silt (ML), and silty clay (CL). Depth to groundwater was approximately 16 feet bgs. No soil staining, odors, or elevated PID readings that would be indicative of contaminated soils were observed in the soil borings; therefore, no soil samples were submitted for analytical analyses. Boring logs are presented in Appendix A. Groundwater Samples Analyte concentrations in groundwater were compared to the applicable Utah Initial Screening Levels (ISLs) and the United States Environmental Protection Agency (U.S. EPA) federal Maximum Contaminant Levels (MCLs). No VOCs were detected in any of the groundwater samples. Groundwater sample GP-1 (13.1 milligrams per liter [mg/L]), exhibited a concentration slightly exceeding its applicable Utah ISL for TRPH of 10 mg/L. Groundwater sample GP-5 (5.02 mg/L), exhibited a concentration of TRPH below its applicable Utah ISL of 10 mg/L. TRPH was not detected in any other Wasatch Environmental Inc. Page 3 groundwater samples. The laboratory analytical report and chain of custody documentation are presented in Appendix B. Sub-Slab Soil Gas Samples Analyte concentrations in sub-slab soil gas were compared to U.S. EPA Vapor Intrusion Screening Level (VISL) Residential Target Sub-slab and Exterior Soil Gas Concentrations and the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentrations; from the U.S. EPA VISL calculator spreadsheet, version 3.5.2. Sub-slab soil gas analytical data are summarized in Table 1. The laboratory analytical report is presented in Appendix C. Sample locations are shown on Figure 1. Benzene was detected in the sub-slab soil gas sample SG-1 at a concentration of 75 micrograms per cubic meter (pg/m3), exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 12 pg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 52 pg/m3. Benzene was detected in the sub-slab soil gas sample SG-2 at a concentration of 28 pg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 12 pg/m3, but below the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 52 pg/m3. Trichloroethene (TCE) was detected in the sub-slab soil gas sample SG-1 at a concentration of 1,000 pg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 16 pg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 100 pg/m3. TCE was also detected in the sub-slab soil gas sample SG-2 at a concentration of 1,400 pg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 16 pg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 100 pg/m3. Tetrachloroethene (PCE) was detected in the sub-slab soil gas sample SG-2 at a concentration of 2,900 pg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 360 pg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 1,600 pg/m3. PCE was detected in sub-slab soil gas sample SG-1 (31 pg/m3), but was not detected at a concentration exceeding its U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration. Ethylbenzene was detected in the sub-slab soil gas sample SG-1 at a concentration of pg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 37 pg/m3, but below the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 160 pg/m3. Ethylbenzene was detected in the sub-slab soil gas sample SG-2 at a concentration of pg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 37 pg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 160 pg/m3 The following VOCs were detected in the sub-slab soil gas samples at concentrations below their applicable U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration (if established): acetone, carbon disulfide, 2-butanone, cis-1,2-dichloroethene, hexane, cyclohexane, heptane, toluene, m,p-xylene, o-xylene, 4-methy1-2-pentanone, 4-ethyl toluene, 1,3,5-trimethylbenzene, and 1,2,4-trimethylbenzene. No other VOCs were detected in the sub-slab soil gas samples. CONCLUSIONS Based on the analytical results, no VOCs were detected in groundwater at concentrations exceeding applicable Utah ISLs or U.S. EPA federal MCLs. Although one groundwater sample exhibited TRPH at a concentration slightly above its applicable Utah ISL of 10 mg/L, it is our experience that this would not likely trigger regulatory enforcement action. Wasatch Environmental Inc. Page 4 Both sub-slab soil gas samples located in the basement of the Lube Shop Building exhibited concentrations of benzene, TCE, PCE, and ethylbenzene above its applicable U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration. Sample SG-2 exhibited the highest concentrations of TCE, PCE, and ethylbenzene above their applicable U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentrations. Additionally, both sub-slab soil gas samples exhibited TCE concentrations well above its applicable U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration. Based on the sub-slab vapor analytical results, it is in our opinion that there has been a release of VOCs at the subject property. As there were no detections of VOCs in groundwater samples collected from borings GP-3 and GP-4, located hydraulically down-gradient from the Lube Shop Building, it appears that these releases are not significant and are likely localized beneath the building. Wasatch recommends further subsurface investigation to delineate the extent of impacts in the area of the Lube Shop Building. Our services consist of professional opinions and recommendations made in accordance with generally accepted environmental engineering principles and practices. This warranty is in lieu of all other warranties either expressed or implied. Should you have any questions, please do not hesitate to contact us. Sincerely, WASATCH ENVIRONMENTAL, INC. Stephen Strehl Field Geologist TABLES Table 1 — Sub-Slab Soil Gas Analytical Data FIGURES Figure 1 — Sample Location Map APPENDICES Appendix A — Boring Logs Appendix B — Groundwater Analytical Results Appendix C — Soil Gas Analytical Results Rebecca Studenka Senior Geologist and Senior Project Manager UST Certified Consultant Wasatch Environmental Inc. Page 5 2410 WEST CALIFORNIA AVENUE • SALT LAKE CITY, UTAH 84104 PHONE (801) 972-8400 • FAX (801) 972-8459 Website: www.wasatch-environmental.com • e-Mail: wei@wasatch-environmental.com Mr. Raphael Mordo June 7, 2018 2996 Vista Circle Project No. 1659-032B Bountiful, Utah 84010 SUBJECT: Phase II Environmental Site Assessment - Subsurface Investigation Clearfield Tyre Pros 1275 South 1000 East Clearfield, Utah Wasatch Environmental Inc., (Wasatch) has completed subsurface investigation activities at the Clearfield Tyre Pros property (Site), located at 1275 South 1000 East, Clearfield, Utah. The investigation activities consisted of advancing six soil borings to facilitate the collection of groundwater samples, and the collection of two sub-slab soil gas samples. BACKGROUND Wasatch prepared an April 13, 2018, Phase I Environmental Site Assessment for the subject property. During the completion of the Phase I Environmental Site Assessment, Wasatch identified the following: • Staining and pooled liquids were observed around the aboveground storage tank (AST) in the lube shop. The lube shop basement floor is constructed of concrete, and several cracks in the concrete were observed during the site visit that would provide a direct pathway for contaminants to enter the subsurface. • Five in-ground hoists were observed within the auto shop building. These hoists have likely been present since the original development of the building (1973) and have not been appropriately decommissioned. It has been our experience that there is a high likelihood of releases from in- ground hoist systems. • All floor drains within the buildings are connected to one of two oil/water separators (OWSs) located outside each of the buildings. The floors of the auto shop and lube shop are washed routinely and receive wash water that includes spilled automotive fluids. The OWSs were inspected and an odor of automobile fluids was noted. The OWSs are reportedly cleaned “every couple of years” and management practices prior to 1999 are unknown. At the time of our site visit, the interior of the OWSs were inspected and there was a distinct petroleum odor. It is our experience that there is a high likelihood of releases from long-term use of OWSs that have received hazardous substances or petroleum products. • The basement of each building is equipped with a sump pump that reportedly discharges groundwater to the storm drains along 1000 East. The subject property owner stated he disconnected the groundwater sump in the lube shop basement because of concerns that the sump could collect oil from lube operations. At the time of our site visit, a dark, thick, oily sheen was observed in this sump. Oil that enters this sump would discharge directly to the subsurface. OBJECTIVES The current scope of work was intended to evaluate the Site for environmental impacts related to the past uses of the property. The environmental sampling activities were not intended to fully delineate all potential releases to the Site. Wasatch Environmental Inc. Page 2 SITE INVESTIGATION ACTIVITIES Wasatch conducted the following investigative activities at the facility as depicted on Figure 1: • Two soil borings (GP-1 and GP-6) were completed inside of the Auto Shop Building near the in- ground hoists and trench drains, in areas of staining and potential releases through cracks. • Two soil borings (GP-2 and GP-3) were completed outside of the Lube Shop Building and Auto Shop Building next to the OWSs where distinct petroleum odors were observed. • One soil boring (GP-5) was completed outside of the Auto Shop Building adjacent to the sump location where potential releases to the subsurface could occur. • One soil boring (GP-4) was completed outside of the Lube Shop Building near the concrete drain and hydraulically down-gradient of the trench drain. • Two soil gas samples (SG-1 and SG-2) were completed in the basement of the Lube Shop Building near staining and pooled liquids around the AST and two basement sumps. Additional sampling locations were considered in the Auto Shop Building; however, access limitations were present in the areas of the northeast and southeast hoists in the Auto Shop Building, which prohibited drilling activities. Additionally, immovable automobiles were located in the south-central and southwest garage bays of the Auto Shop Building which prohibited drilling activities in these areas. FIELD METHODOLOGY Soil Sampling On May 16, 2018, Wasatch Field Geologist, Stephen Strehl, directed the completion of six soil borings (GP-1 through GP-6), using direct-push drilling techniques, to evaluate soil and groundwater conditions at the Site. Direct Push Services (DPS) advanced the soil borings using a GeoProbe Model 7822 DT. The boring locations are shown on Figure 1. Each of the soil borings were advanced to a depth of 20 feet below ground surface (bgs). Soil samples from the borings were collected using 5-foot long, by 1.5-inch diameter, discrete interval push samplers equipped with disposable polybutyrate liners. Drill rods were decontaminated between each soil boring. The soil cores were field logged by an experienced geologist. The field logging included a description of color, consistency, odor, staining, and soil type based on the Unified Soil Classification System. The soil cores were screened in the field with a photoionization detector (PID) equipped with a 10.6 electron volt (eV) lamp. The PID was calibrated with a 100-parts per million (ppm) isobutylene standard calibration gas. The PID is utilized to identify soils which may have been impacted by volatile organic compounds (VOCs) such as those found in petroleum fuels and some solvents. Following the completion of sampling activities, the borings were backfilled with bentonite pellets, hydrated, and patched with asphalt or concrete to match the existing surface at each boring location. Groundwater Sampling Groundwater samples were collected from each of the soil borings (GP-1 through GP-6). The boring locations are shown on Figure 1. Groundwater samples were collected using stainless steel well-points and a peristaltic pump. Groundwater was initially purged from the borings to reduce the turbidity of the samples; however, groundwater remained turbid, resulting in turbid samples. Groundwater samples were analyzed for VOCs by U.S. Environmental Protection Agency (EPA) Method 8260C and total recoverable petroleum hydrocarbons (TRPH) by U.S. EPA Method E1664B-SGT. Groundwater samples collected for Wasatch Environmental Inc. Page 3 VOCs were dispensed into 40-milliliter capacity, glass vials with Teflon® septa caps. The vials were supplied by the analytical laboratory and contained several drops of hydrochloric acid as a preservative. The vials were filled slowly until a meniscus formed at the top of each vial, then each vial was sealed with a septa cap. This procedure eliminates headspace within the vials and minimizes the loss of volatiles. Groundwater samples collected for TRPH were dispensed into single 1.0 L, unpreserved, amber glass jars. The sample vials/bottles were each labeled with the sample location, sample identification, date and time of sample collection, and requested analysis. The samples were placed in a cooler with ice and transported under chain-of-custody protocol to American West Analytical Laboratory (AWAL) for analysis. Sub-Slab Soil Gas Sampling Wasatch personnel collected sub-slab soil gas samples from two locations (SG-1 and SG-2) beneath the floor slab in the basement of the Lube Shop Building where staining was observed near the ASTs and sump pumps. The sample locations are shown on Figure 1. The technique for collecting the soil gas sample began by checking for a vacuum in the 6-liter Summa canister supplied by ALS Laboratories (ALS). The initial vacuum was recorded on the chain-of-custody form provided by ALS. A ⅝-inch hole was drilled through the concrete slab at the sampling location using a percussion hammer drill to a depth of approximately 1½ feet below the concrete slab. A brass vapor pin equipped with a silicone sleeve was inserted into the hole and a bentonite paste seal was placed around the silicone sleeve and vapor pin. Next, tubing was attached to the vapor pin. The bentonite paste was allowed to set for a minimum of ½-hour while the hole equilibrated. A sample regulator equipped with a flow restrictor was provided by ALS for the sample. A sample regulator was attached to the 6-liter Summa sample canister. The tubing from the vapor pin was then attached to the sample regulator and the valve on the sample canister was opened. The vacuum gauge on the flow restrictor was monitored, with decreasing vacuum indicating that soil gas was being collected into the sample canister. The sample was collected for approximately ½-hour. Alcohol pads were placed near the drilled hole and near the Summa canister to check for leaks. The final vacuum was recorded on the chain-of-custody form provided by ALS. The valve on the sample canister was then closed, sample regulator removed, and brass cap tightened to the inlet of the sample canister. The vapor pin was removed from the hole and the hole was filled and finished with concrete. The sample canister was labeled with the appropriate sample location, as well as initial and final vacuum readings. Chain-of- custody documentation was completed, and the samples were delivered to ALS for analysis of VOCs using U.S. EPA Method TO-15. FIELD OBSERVATIONS AND LABORATORY ANALYTICAL RESULTS Soil Samples Soils at the Site generally consist of fill, gravelly sand (SW), silt (ML), and silty clay (CL). Depth to groundwater was approximately 16 feet bgs. No soil staining, odors, or elevated PID readings that would be indicative of contaminated soils were observed in the soil borings; therefore, no soil samples were submitted for analytical analyses. Boring logs are presented in Appendix A. Groundwater Samples Analyte concentrations in groundwater were compared to the applicable Utah Initial Screening Levels (ISLs) and the United States Environmental Protection Agency (U.S. EPA) federal Maximum Contaminant Levels (MCLs). No VOCs were detected in any of the groundwater samples. Groundwater sample GP-1 (13.1 milligrams per liter [mg/L]), exhibited a concentration slightly exceeding its applicable Utah ISL for TRPH of 10 mg/L. Groundwater sample GP-5 (5.02 mg/L), exhibited a concentration of TRPH below its applicable Utah ISL of 10 mg/L. TRPH was not detected in any other Wasatch Environmental Inc. Page 4 groundwater samples. The laboratory analytical report and chain of custody documentation are presented in Appendix B. Sub-Slab Soil Gas Samples Analyte concentrations in sub-slab soil gas were compared to U.S. EPA Vapor Intrusion Screening Level (VISL) Residential Target Sub-slab and Exterior Soil Gas Concentrations and the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentrations; from the U.S. EPA VISL calculator spreadsheet, version 3.5.2. Sub-slab soil gas analytical data are summarized in Table 1. The laboratory analytical report is presented in Appendix C. Sample locations are shown on Figure 1. Benzene was detected in the sub-slab soil gas sample SG-1 at a concentration of 75 micrograms per cubic meter (µg/m3), exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 12 µg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 52 µg/m3. Benzene was detected in the sub-slab soil gas sample SG-2 at a concentration of 28 µg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 12 µg/m3, but below the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 52 µg/m3. Trichloroethene (TCE) was detected in the sub-slab soil gas sample SG-1 at a concentration of 1,000 µg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 16 µg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 100 µg/m3. TCE was also detected in the sub-slab soil gas sample SG-2 at a concentration of 1,400 µg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 16 µg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 100 µg/m3. Tetrachloroethene (PCE) was detected in the sub-slab soil gas sample SG-2 at a concentration of 2,900 µg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 360 µg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 1,600 µg/m3. PCE was detected in sub-slab soil gas sample SG-1 (31 µg/m3), but was not detected at a concentration exceeding its U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration. Ethylbenzene was detected in the sub-slab soil gas sample SG-1 at a concentration of µg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 37 µg/m3, but below the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 160 µg/m3. Ethylbenzene was detected in the sub-slab soil gas sample SG-2 at a concentration of µg/m3, exceeding the U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration of 37 µg/m3, and exceeding the U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration of 160 µg/m3. The following VOCs were detected in the sub-slab soil gas samples at concentrations below their applicable U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration (if established): acetone, carbon disulfide, 2-butanone, cis-1,2-dichloroethene, hexane, cyclohexane, heptane, toluene, m,p-xylene, o-xylene, 4-methyl-2-pentanone, 4-ethyl toluene, 1,3,5-trimethylbenzene, and 1,2,4-trimethylbenzene. No other VOCs were detected in the sub-slab soil gas samples. CONCLUSIONS Based on the analytical results, no VOCs were detected in groundwater at concentrations exceeding applicable Utah ISLs or U.S. EPA federal MCLs. Although one groundwater sample exhibited TRPH at a concentration slightly above its applicable Utah ISL of 10 mg/L, it is our experience that this would not likely trigger regulatory enforcement action. Wasatch Environmental Inc. Page 5 Both sub-slab soil gas samples located in the basement of the Lube Shop Building exhibited concentrations of benzene, TCE, PCE, and ethylbenzene above its applicable U.S. EPA VISL Residential Target Sub-slab and Exterior Soil Gas Concentration. Sample SG-2 exhibited the highest concentrations of TCE, PCE, and ethylbenzene above their applicable U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentrations. Additionally, both sub-slab soil gas samples exhibited TCE concentrations well above its applicable U.S. EPA VISL Commercial Target Sub-slab and Exterior Soil Gas Concentration. Based on the sub-slab vapor analytical results, it is in our opinion that there has been a release of VOCs at the subject property. As there were no detections of VOCs in groundwater samples collected from borings GP-3 and GP-4, located hydraulically down-gradient from the Lube Shop Building, it appears that these releases are not significant and are likely localized beneath the building. Wasatch recommends further subsurface investigation to delineate the extent of impacts in the area of the Lube Shop Building. Our services consist of professional opinions and recommendations made in accordance with generally accepted environmental engineering principles and practices. This warranty is in lieu of all other warranties either expressed or implied. Should you have any questions, please do not hesitate to contact us. Sincerely, WASATCH ENVIRONMENTAL, INC. Stephen Strehl Rebecca Studenka Field Geologist Senior Geologist and Senior Project Manager UST Certified Consultant TABLES Table 1 – Sub-Slab Soil Gas Analytical Data FIGURES Figure 1 – Sample Location Map APPENDICES Appendix A – Boring Logs Appendix B – Groundwater Analytical Results Appendix C – Soil Gas Analytical Results Sample ID Sample Collection Date Ac e t o n e Ca r b o n d i s u l f i d e 2- B u t a n o n e ci s - 1 , 2 - D i c h l o r o e t h e n e 1, 1 - D i c h l o r o e t h e n e ( D C E ) He x a n e Be n z e n e Cy c l o h e x a n e Tr i c h l o r o e t h e n e ( T C E ) He p t a n e To l u e n e Te t r a c h l o r o e t h e n e ( P C E ) Et h y l b e n z e n e m, p - X y l e n e o- X y l e n e 4- M e t h y l - 2 - p e n t a n o n e 4- E t h y l t o l u e n e 1, 3 , 5 - T r i m e t h y l b e n z e n e 1, 2 , 4 - T r i m e t h y l b e n z e n e SG-1 5/16/18 6,800 38 130 330 9.7 860 75 710 1,000 500 1,300 31 150 800 440 75 41 110 99 SG-2 5/16/18 14,000 7.5 58 3,800 <5.9 24 28 <5.2 1,400 45 170 2,900 190 710 200 160 <15 16 21 1,100,000 24,000 5,200 --- 7,000 24,000 12 210,000 16 14,000 170,000 360 37 3,500 3,500 3,100 --- --- 2,100 4,500,000 100,000 22,000 --- 29,000 100,000 52 880,000 100 58,000 730,000 1,600 160 15,000 15,000 13,000 --- --- 8,800 NOTES: Only analytes that were detected at concentrations above the reporting limit in one or more samples are presented in the table. < = concentration was below the reporting limit BOLD ITALICS = measured concentration is greater than the applicable United States (U.S.) Environmental Protection Agency (EPA) Vapor Intrusion Screening Level (VISL) calculator spreadsheet, version 3.5.1, Residential Target Subslab Soil Gas Concentration (TCR = --- = No U.S. EPA VISL Target Subslab Soil Gas Concentration has been established VISL Commercial Target Sub-Slab and Exterior Soil Gas Concentration VISL Residential Target Sub-Slab and Exterior Soil Gas Concentration Table 1 Soil Gas Analytical Data Point-S Fowers Tire & Auto Service Clearfield, Utah all concentrations are expressed in micrograms per cubic meter (µg/m 3) except as noted otherwise The use or reuse of this information is restricted to the referenced document unless otherwise authorized. Wasatch Environmental Copyright 2006 Figure 1Sample Location Map Approximate Location of Subject Property M a i n S t r e e t 10 0 0 E a s t 1225 South Gr a v e l C o v e r e d S t o r a g e Lube Shop Building Auto Shop Building O/W Separator O/W Separator Gr o u n d w a t e r M W ( M W -5 ) Pa v e m e n t Propane Former UST Point-S Fowers Tire & Auto Service WEI 1659-032B Pa v e m e n t Pavement Trench Drains In-ground Hoists Floor Drain Sump Trench Drains AST Location (Basement) Boring Location Sub-Slab Soil Gas Sample Location N S EW GP-2 GP-5 GP-1 GP-6 GP-4 GP-3 SG-1 SG-2 Inaccessible Areas Groundwater Flow Direction Appendix A Boring Logs N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DATE DRILLED: LOGGED BY: REFERENCE ELEVATION: DRILL RIG: TOTAL DEPTH: DEPTH TO GROUNDWATER: DESCRIPTION AND CLASSIFICATION Description and Remarks Color Soil Type Consist.De p t h ( f e e t ) Sa m p l e r Bl o w s / F o o t PI D ( p p m ) Wat e r L e v e l Temporary Well Construction WELL LOG BORING NO.:PROJECT NO.:Environmental Science and Engineering Point-S Fowers Tire & Auto Service 1275 S 1000 East St Clearfield, Utah, 84015 1659-032B GP-1 Medium Dense SW End of Boring Loose 5/16/2018 Stephen Strehl GeoProbe 7822DT 20’ ML CL Light Brown Silty Clay: medium plasticity, moist Very Stiff Brown Light Brown 16’ Concrete top 2” Silt: with clay, low plasticity, moist No recovery 10’ to 15’ Gravelly Sand (fill): fine to medium-grained, small to medium sub-rounded gravel, moist temporary piezometer screen placed at 15’ to 19’ 0.1 0.0 0.0 0.1 Dark Brown MLSilt: with clay, some very fine-grained sand, low plasticity, moist Medium Dense Light Brown CLSilty Clay: medium plasticity, moist Very Stiff Brown CLSilty Clay: low plasticity, some very fine-grained sand, moist, 2” gravelly sand at 16’, saturated at 16’ Very Stiff Light Brown 0.1 0.0 0.0 0.0 N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DATE DRILLED: LOGGED BY: REFERENCE ELEVATION: DRILL RIG: TOTAL DEPTH: DEPTH TO GROUNDWATER: DESCRIPTION AND CLASSIFICATION Description and Remarks Color Soil Type Consist.De p t h ( f e e t ) Sa m p l e r Bl o w s / F o o t PI D ( p p m ) Wat e r L e v e l Temporary Well Construction WELL LOG BORING NO.:PROJECT NO.:Environmental Science and Engineering Point-S Fowers Tire & Auto Service 1275 S 1000 East St Clearfield, Utah, 84015 1659-032B GP-2 Medium Dense SW End of Boring Loose 5/16/2018 Stephen Strehl GeoProbe 7822DT 20’ ML Light Brown 16’ Asphalt top 4” Silt: with clay, low plasticity, moist, some very fine-grained sand from 6’ to 9’ Gravelly Sand (fill): fine to medium-grained, small to medium sub-rounded gravel, moist temporary piezometer screen placed at 15’ to 19’ 0.0 0.0 0.0 Dark Brown CLSilty Clay: low plasticity, some very fine-grained sand, moist, small to coarse-grained sand from 16’ to 17’, small sub-rounded gravels from 16’-17’, saturated at 16’ StiffLight Brown Soft 0.0 0.0 0.0 0.0 Stiff DenseLight Brown N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DATE DRILLED: LOGGED BY: REFERENCE ELEVATION: DRILL RIG: TOTAL DEPTH: DEPTH TO GROUNDWATER: DESCRIPTION AND CLASSIFICATION Description and Remarks Color Soil Type Consist.De p t h ( f e e t ) Sa m p l e r Bl o w s / F o o t PI D ( p p m ) Wat e r L e v e l Temporary Well Construction WELL LOG BORING NO.:PROJECT NO.:Environmental Science and Engineering Point-S Fowers Tire & Auto Service 1275 S 1000 East St Clearfield, Utah, 84015 1659-032B GP-3 Medium Dense SW End of Boring Loose 5/16/2018 Stephen Strehl GeoProbe 7822DT 20’ ML Light Brown Light Brown 16’ Asphalt top 4” Silt: with clay, low plasticity, moist, some very fine-grained sand from 6’ to 9’ Gravelly Sand (fill): fine to medium-grained, small to medium sub-rounded gravel, moist temporary piezometer screen placed at 15’ to 19’ 0.0 0.0 Dark Brown Silty Clay: low plasticity, some very fine-grained sand, moist, small to coarse-grained sand from 16’ to 18’, small sub-rounded gravels from 16’-18’, saturated at 16’ Soft 0.0 0.0 0.0 0.0Stiff StiffCL 0.3 N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DATE DRILLED: LOGGED BY: REFERENCE ELEVATION: DRILL RIG: TOTAL DEPTH: DEPTH TO GROUNDWATER: DESCRIPTION AND CLASSIFICATION Description and Remarks Color Soil Type Consist.De p t h ( f e e t ) Sa m p l e r Bl o w s / F o o t PI D ( p p m ) Wat e r L e v e l Temporary Well Construction WELL LOG BORING NO.:PROJECT NO.:Environmental Science and Engineering Point-S Fowers Tire & Auto Service 1275 S 1000 East St Clearfield, Utah, 84015 1659-032B GP-4 Medium Dense SW End of Boring Loose 5/16/2018 Stephen Strehl GeoProbe 7822DT 20’ ML Light Brown Light Brown 16’ Asphalt top 4” Silt: with clay, low plasticity, moist, some very fine-grained sand Gravelly Sand (fill): fine to coarse-grained, small to large sub-angular gravel, moist temporary piezometer screen placed at 15’ to 19’ 0.0 Dark Brown Stiff Soft Stiff Medium Dense CLSilty Clay: low plasticity, some very fine-grained sand at 8’, moist, saturated at 16’ 0.0 N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DATE DRILLED: LOGGED BY: REFERENCE ELEVATION: DRILL RIG: TOTAL DEPTH: DEPTH TO GROUNDWATER: DESCRIPTION AND CLASSIFICATION Description and Remarks Color Soil Type Consist.De p t h ( f e e t ) Sa m p l e r Bl o w s / F o o t PI D ( p p m ) Wat e r L e v e l Temporary Well Construction WELL LOG BORING NO.:PROJECT NO.:Environmental Science and Engineering Point-S Fowers Tire & Auto Service 1275 S 1000 East St Clearfield, Utah, 84015 1659-032B GP-5 Medium Dense SW End of Boring Loose 5/16/2018 Stephen Strehl GeoProbe 7822DT 20’ ML Dense Light Brown Light Brown 16’ Asphalt top 4” Silt: with clay, low plasticity, moist, some very fine-grained sand Gravelly Sand (fill): fine to medium-grained, small to medium sub-rounded gravel, moist temporary piezometer screen placed at 15’ to 19’ 0.0 Brown CLSilty Clay: low plasticity, some very fine-grained sand, moist, small to coarse-grained sand from 16’ to 17’, small sub-rounded gravels from 16’-17’, saturated at 16’ StiffLight Brown Medium Dense CLSilty Clay: low plasticity, some very fine-grained sand at 7’, moist Light Brown LooseSWGravelly Sand: fine to coarse-grained, small to medium sub-rounded gravel, moist 0.0 N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DATE DRILLED: LOGGED BY: REFERENCE ELEVATION: DRILL RIG: TOTAL DEPTH: DEPTH TO GROUNDWATER: DESCRIPTION AND CLASSIFICATION Description and Remarks Color Soil Type Consist.De p t h ( f e e t ) Sa m p l e r Bl o w s / F o o t PI D ( p p m ) Wat e r L e v e l Temporary Well Construction WELL LOG BORING NO.:PROJECT NO.:Environmental Science and Engineering Point-S Fowers Tire & Auto Service 1275 S 1000 East St Clearfield, Utah, 84015 1659-032B GP-6 Medium Dense SW End of Boring Loose 5/16/2018 Stephen Strehl GeoProbe 7822DT 20’ MLLight Brown Light Brown 16’ Concrete top 2” Silt: with clay, low plasticity, moist Gravelly Sand: with silt, fine to coarse-grained, small to large sub-rounded gravels, moist Gravelly Sand (fill): fine to medium-grained, small to medium sub-rounded gravel, moist temporary piezometer screen placed at 15’ to 19’ 0.0 Dark Brown CLSilty Clay: low plasticity, some very fine-grained sand, moist, 2” gravelly sand at 16’, saturated at 16’ Very Stiff Light Brown 0.0 SW LooseLight Brown Appendix B Groundwater Analytical Results 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Wasatch Environmental Rebecca Studenka Dear Rebecca Studenka: Clearfield Tire / 1659-032B Lab Set ID:1805415 (801) 972-8400 2410 West California Avenue Salt Lake City,UT 84104 RE: TEL: American West Analytical Laboratories received sample(s) on 5/16/2018 for the analyses presented in the following report. American West Analytical Laboratories (AWAL)is accredited by The National Environmental Laboratory Accreditation Program (NELAP)in Utah and Texas;and is state accredited in Colorado,Idaho,New Mexico,Wyoming,and Missouri. All analyses were performed in accordance to the NELAP protocols unless noted otherwise.Accreditation scope documents are available upon request.If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr"found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection,extraction,and/or purging efficiency.The "Reporting Limit"found on the report is equivalent to the practical quantitation limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit.Analytical results are reported to three significant figures for quality control and calculation purposes. Thank You, Approved by: _____________________________ Laboratory Director or designee            3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Project:Clearfield Tire /1659-032B Contact:Rebecca StudenkaClient:Wasatch Environmental INORGANIC ANALYTICAL REPORT Lab Sample ID:1805415-001 Client Sample ID:GP-1 Collection Date:5/16/2018 Received Date:5/16/2018 935h 1730h Compound Analytical Result QualUnits Date Prepared Method Used Reporting Limit Date Analyzed Analytical Results 13.15.00mg/LSGT-HEM/Non-Polar Material 5/24/2018 E1664B-SGT2026h 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Project:Clearfield Tire /1659-032B Contact:Rebecca StudenkaClient:Wasatch Environmental INORGANIC ANALYTICAL REPORT Lab Sample ID:1805415-002 Client Sample ID:GP-2 Collection Date:5/16/2018 Received Date:5/16/2018 1055h 1730h Compound Analytical Result QualUnits Date Prepared Method Used Reporting Limit Date Analyzed Analytical Results <5.005.00mg/LSGT-HEM/Non-Polar Material 5/24/2018 E1664B-SGT2026h 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Project:Clearfield Tire /1659-032B Contact:Rebecca StudenkaClient:Wasatch Environmental INORGANIC ANALYTICAL REPORT Lab Sample ID:1805415-003 Client Sample ID:GP-3 Collection Date:5/16/2018 Received Date:5/16/2018 1150h 1730h Compound Analytical Result QualUnits Date Prepared Method Used Reporting Limit Date Analyzed Analytical Results <5.005.00mg/LSGT-HEM/Non-Polar Material 5/24/2018 E1664B-SGT2026h 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Project:Clearfield Tire /1659-032B Contact:Rebecca StudenkaClient:Wasatch Environmental INORGANIC ANALYTICAL REPORT Lab Sample ID:1805415-004 Client Sample ID:GP-4 Collection Date:5/16/2018 Received Date:5/16/2018 1300h 1730h Compound Analytical Result QualUnits Date Prepared Method Used Reporting Limit Date Analyzed Analytical Results <5.005.00mg/LSGT-HEM/Non-Polar Material 5/24/2018 E1664B-SGT2026h 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Project:Clearfield Tire /1659-032B Contact:Rebecca StudenkaClient:Wasatch Environmental INORGANIC ANALYTICAL REPORT Lab Sample ID:1805415-005 Client Sample ID:GP-5 Collection Date:5/16/2018 Received Date:5/16/2018 1440h 1730h Compound Analytical Result QualUnits Date Prepared Method Used Reporting Limit Date Analyzed Analytical Results 5.025.00mg/LSGT-HEM/Non-Polar Material 5/24/2018 E1664B-SGT2026h 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Project:Clearfield Tire /1659-032B Contact:Rebecca StudenkaClient:Wasatch Environmental INORGANIC ANALYTICAL REPORT Lab Sample ID:1805415-006 Client Sample ID:GP-6 Collection Date:5/16/2018 Received Date:5/16/2018 1540h 1730h Compound Analytical Result QualUnits Date Prepared Method Used Reporting Limit Date Analyzed Analytical Results <5.005.00mg/LSGT-HEM/Non-Polar Material 5/24/2018 E1664B-SGT2026h 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Client:Wasatch Environmental ORGANIC ANALYTICAL REPORT Contact:Rebecca Studenka Project:Clearfield Tire /1659-032B Lab Sample ID:1805415-001A Client Sample ID:GP-1 Collection Date:5/16/2018 Received Date:5/16/2018 Analytical Results VOAs AWAL List by GC/MS Method 8260C/5030C 935h 1730h Test Code:8260-W Units:µg/L Dilution Factor:10 Analyzed:5/19/2018 021h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual 1,1,1-Trichloroethane 20.0 <20.071-55-6 1,1,2,2-Tetrachloroethane 20.0 <20.079-34-5 1,1,2-Trichloro-1,2,2-trifluoroethane 20.0 <20.076-13-1 1,1,2-Trichloroethane 20.0 <20.079-00-5 1,1-Dichloroethane 20.0 <20.075-34-3 1,1-Dichloroethene 20.0 <20.075-35-4 1,2,4-Trichlorobenzene 20.0 <20.0120-82-1 1,2-Dibromo-3-chloropropane 50.0 <50.096-12-8 1,2-Dibromoethane 20.0 <20.0106-93-4 1,2-Dichlorobenzene 20.0 <20.095-50-1 1,2-Dichloroethane 20.0 <20.0107-06-2 1,2-Dichloropropane 20.0 <20.078-87-5 1,3-Dichlorobenzene 20.0 <20.0541-73-1 1,4-Dichlorobenzene 20.0 <20.0106-46-7 2-Butanone 100 <10078-93-3 2-Hexanone 50.0 <50.0591-78-6 4-Methyl-2-pentanone 50.0 <50.0108-10-1 Acetone 100 <10067-64-1 Benzene 20.0 <20.071-43-2 Bromodichloromethane 20.0 <20.075-27-4 Bromoform 20.0 <20.075-25-2 Bromomethane 50.0 <50.074-83-9 Carbon disulfide 20.0 <20.075-15-0 Carbon tetrachloride 20.0 <20.056-23-5 Chlorobenzene 20.0 <20.0108-90-7 Chloroethane 20.0 <20.075-00-3 Chloroform 20.0 <20.067-66-3 Chloromethane 50.0 <50.074-87-3 cis-1,2-Dichloroethene 20.0 <20.0156-59-2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Lab Sample ID:1805415-001A Client Sample ID:GP-1 Units:µg/L Dilution Factor:10 Analyzed:5/19/2018 021h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual cis-1,3-Dichloropropene 20.0 <20.010061-01-5 Cyclohexane 20.0 <20.0110-82-7 Dibromochloromethane 20.0 <20.0124-48-1 Dichlorodifluoromethane 20.0 <20.075-71-8 Ethylbenzene 20.0 <20.0100-41-4 Isopropylbenzene 20.0 <20.098-82-8 Methyl Acetate 50.0 <50.079-20-9 Methyl tert-butyl ether 20.0 <20.01634-04-4 Methylcyclohexane 20.0 <20.0108-87-2 Methylene chloride 20.0 <20.075-09-2 Naphthalene 20.0 <20.091-20-3 Styrene 20.0 <20.0100-42-5 Tetrachloroethene 20.0 <20.0127-18-4 Toluene 20.0 <20.0108-88-3 trans-1,2-Dichloroethene 20.0 <20.0156-60-5 trans-1,3-Dichloropropene 20.0 <20.010061-02-6 Trichloroethene 20.0 <20.079-01-6 Trichlorofluoromethane 20.0 <20.075-69-4 Vinyl chloride 10.0 <10.075-01-4 Xylenes,Total 20.0 <20.01330-20-7 The pHof the sample was>2.Analysis was performed within the 7 day holding time. The reporting limits were raised due to sample matrix interferences.Oily sheen on sample surface. Surrogate CAS Result Amount Spiked %REC Limits QualUnits:µg/L 500.0 98.8Surr:1,2-Dichloroethane-d4 17060-07-0 72-151494 500.0 105Surr:4-Bromofluorobenzene 460-00-4 80-152525 500.0 95.8Surr:Dibromofluoromethane 1868-53-7 72-135479 500.0 103Surr:Toluene-d8 2037-26-5 80-124515 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Client:Wasatch Environmental ORGANIC ANALYTICAL REPORT Contact:Rebecca Studenka Project:Clearfield Tire /1659-032B Lab Sample ID:1805415-002A Client Sample ID:GP-2 Collection Date:5/16/2018 Received Date:5/16/2018 Analytical Results VOAs AWAL List by GC/MS Method 8260C/5030C 1055h 1730h Test Code:8260-W Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2243h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual 1,1,1-Trichloroethane 2.00 <2.0071-55-6 1,1,2,2-Tetrachloroethane 2.00 <2.0079-34-5 1,1,2-Trichloro-1,2,2-trifluoroethane 2.00 <2.0076-13-1 1,1,2-Trichloroethane 2.00 <2.0079-00-5 1,1-Dichloroethane 2.00 <2.0075-34-3 1,1-Dichloroethene 2.00 <2.0075-35-4 1,2,4-Trichlorobenzene 2.00 <2.00120-82-1 1,2-Dibromo-3-chloropropane 5.00 <5.0096-12-8 1,2-Dibromoethane 2.00 <2.00106-93-4 1,2-Dichlorobenzene 2.00 <2.0095-50-1 1,2-Dichloroethane 2.00 <2.00107-06-2 1,2-Dichloropropane 2.00 <2.0078-87-5 1,3-Dichlorobenzene 2.00 <2.00541-73-1 1,4-Dichlorobenzene 2.00 <2.00106-46-7 2-Butanone 10.0 <10.078-93-3 2-Hexanone 5.00 <5.00591-78-6 4-Methyl-2-pentanone 5.00 <5.00108-10-1 Acetone 10.0 <10.067-64-1 Benzene 2.00 <2.0071-43-2 Bromodichloromethane 2.00 <2.0075-27-4 Bromoform 2.00 <2.0075-25-2 Bromomethane 5.00 <5.0074-83-9 Carbon disulfide 2.00 <2.0075-15-0 Carbon tetrachloride 2.00 <2.0056-23-5 Chlorobenzene 2.00 <2.00108-90-7 Chloroethane 2.00 <2.0075-00-3 Chloroform 2.00 <2.0067-66-3 Chloromethane 5.00 <5.0074-87-3 cis-1,2-Dichloroethene 2.00 <2.00156-59-2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Lab Sample ID:1805415-002A Client Sample ID:GP-2 Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2243h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual cis-1,3-Dichloropropene 2.00 <2.0010061-01-5 Cyclohexane 2.00 <2.00110-82-7 Dibromochloromethane 2.00 <2.00124-48-1 Dichlorodifluoromethane 2.00 <2.0075-71-8 Ethylbenzene 2.00 <2.00100-41-4 Isopropylbenzene 2.00 <2.0098-82-8 Methyl Acetate 5.00 <5.0079-20-9 Methyl tert-butyl ether 2.00 <2.001634-04-4 Methylcyclohexane 2.00 <2.00108-87-2 Methylene chloride 2.00 <2.0075-09-2 Naphthalene 2.00 <2.0091-20-3 Styrene 2.00 <2.00100-42-5 Tetrachloroethene 2.00 <2.00127-18-4 Toluene 2.00 <2.00108-88-3 trans-1,2-Dichloroethene 2.00 <2.00156-60-5 trans-1,3-Dichloropropene 2.00 <2.0010061-02-6 Trichloroethene 2.00 <2.0079-01-6 Trichlorofluoromethane 2.00 <2.0075-69-4 Vinyl chloride 1.00 <1.0075-01-4 Xylenes,Total 2.00 <2.001330-20-7 The pHof the sample was>2.Analysis was performed within the 7 day holding time. Surrogate CAS Result Amount Spiked %REC Limits QualUnits:µg/L 50.00 99.3Surr:1,2-Dichloroethane-d4 17060-07-0 72-15149.7 50.00 107Surr:4-Bromofluorobenzene 460-00-4 80-15253.5 50.00 98.6Surr:Dibromofluoromethane 1868-53-7 72-13549.3 50.00 104Surr:Toluene-d8 2037-26-5 80-12452.1 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Client:Wasatch Environmental ORGANIC ANALYTICAL REPORT Contact:Rebecca Studenka Project:Clearfield Tire /1659-032B Lab Sample ID:1805415-003A Client Sample ID:GP-3 Collection Date:5/16/2018 Received Date:5/16/2018 Analytical Results VOAs AWAL List by GC/MS Method 8260C/5030C 1150h 1730h Test Code:8260-W Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2302h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual 1,1,1-Trichloroethane 2.00 <2.0071-55-6 1,1,2,2-Tetrachloroethane 2.00 <2.0079-34-5 1,1,2-Trichloro-1,2,2-trifluoroethane 2.00 <2.0076-13-1 1,1,2-Trichloroethane 2.00 <2.0079-00-5 1,1-Dichloroethane 2.00 <2.0075-34-3 1,1-Dichloroethene 2.00 <2.0075-35-4 1,2,4-Trichlorobenzene 2.00 <2.00120-82-1 1,2-Dibromo-3-chloropropane 5.00 <5.0096-12-8 1,2-Dibromoethane 2.00 <2.00106-93-4 1,2-Dichlorobenzene 2.00 <2.0095-50-1 1,2-Dichloroethane 2.00 <2.00107-06-2 1,2-Dichloropropane 2.00 <2.0078-87-5 1,3-Dichlorobenzene 2.00 <2.00541-73-1 1,4-Dichlorobenzene 2.00 <2.00106-46-7 2-Butanone 10.0 <10.078-93-3 2-Hexanone 5.00 <5.00591-78-6 4-Methyl-2-pentanone 5.00 <5.00108-10-1 Acetone 10.0 <10.067-64-1 Benzene 2.00 <2.0071-43-2 Bromodichloromethane 2.00 <2.0075-27-4 Bromoform 2.00 <2.0075-25-2 Bromomethane 5.00 <5.0074-83-9 Carbon disulfide 2.00 <2.0075-15-0 Carbon tetrachloride 2.00 <2.0056-23-5 Chlorobenzene 2.00 <2.00108-90-7 Chloroethane 2.00 <2.0075-00-3 Chloroform 2.00 <2.0067-66-3 Chloromethane 5.00 <5.0074-87-3 cis-1,2-Dichloroethene 2.00 <2.00156-59-2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Lab Sample ID:1805415-003A Client Sample ID:GP-3 Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2302h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual cis-1,3-Dichloropropene 2.00 <2.0010061-01-5 Cyclohexane 2.00 <2.00110-82-7 Dibromochloromethane 2.00 <2.00124-48-1 Dichlorodifluoromethane 2.00 <2.0075-71-8 Ethylbenzene 2.00 <2.00100-41-4 Isopropylbenzene 2.00 <2.0098-82-8 Methyl Acetate 5.00 <5.0079-20-9 Methyl tert-butyl ether 2.00 <2.001634-04-4 Methylcyclohexane 2.00 <2.00108-87-2 Methylene chloride 2.00 <2.0075-09-2 Naphthalene 2.00 <2.0091-20-3 Styrene 2.00 <2.00100-42-5 Tetrachloroethene 2.00 <2.00127-18-4 Toluene 2.00 <2.00108-88-3 trans-1,2-Dichloroethene 2.00 <2.00156-60-5 trans-1,3-Dichloropropene 2.00 <2.0010061-02-6 Trichloroethene 2.00 <2.0079-01-6 Trichlorofluoromethane 2.00 <2.0075-69-4 Vinyl chloride 1.00 <1.0075-01-4 Xylenes,Total 2.00 <2.001330-20-7 The pHof the sample was>2.Analysis was performed within the 7 day holding time. Surrogate CAS Result Amount Spiked %REC Limits QualUnits:µg/L 50.00 99.1Surr:1,2-Dichloroethane-d4 17060-07-0 72-15149.5 50.00 107Surr:4-Bromofluorobenzene 460-00-4 80-15253.5 50.00 98.6Surr:Dibromofluoromethane 1868-53-7 72-13549.3 50.00 104Surr:Toluene-d8 2037-26-5 80-12452.1 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Client:Wasatch Environmental ORGANIC ANALYTICAL REPORT Contact:Rebecca Studenka Project:Clearfield Tire /1659-032B Lab Sample ID:1805415-004A Client Sample ID:GP-4 Collection Date:5/16/2018 Received Date:5/16/2018 Analytical Results VOAs AWAL List by GC/MS Method 8260C/5030C 1300h 1730h Test Code:8260-W Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2322h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual 1,1,1-Trichloroethane 2.00 <2.0071-55-6 1,1,2,2-Tetrachloroethane 2.00 <2.0079-34-5 1,1,2-Trichloro-1,2,2-trifluoroethane 2.00 <2.0076-13-1 1,1,2-Trichloroethane 2.00 <2.0079-00-5 1,1-Dichloroethane 2.00 <2.0075-34-3 1,1-Dichloroethene 2.00 <2.0075-35-4 1,2,4-Trichlorobenzene 2.00 <2.00120-82-1 1,2-Dibromo-3-chloropropane 5.00 <5.0096-12-8 1,2-Dibromoethane 2.00 <2.00106-93-4 1,2-Dichlorobenzene 2.00 <2.0095-50-1 1,2-Dichloroethane 2.00 <2.00107-06-2 1,2-Dichloropropane 2.00 <2.0078-87-5 1,3-Dichlorobenzene 2.00 <2.00541-73-1 1,4-Dichlorobenzene 2.00 <2.00106-46-7 2-Butanone 10.0 <10.078-93-3 2-Hexanone 5.00 <5.00591-78-6 4-Methyl-2-pentanone 5.00 <5.00108-10-1 Acetone 10.0 <10.067-64-1 Benzene 2.00 <2.0071-43-2 Bromodichloromethane 2.00 <2.0075-27-4 Bromoform 2.00 <2.0075-25-2 Bromomethane 5.00 <5.0074-83-9 Carbon disulfide 2.00 <2.0075-15-0 Carbon tetrachloride 2.00 <2.0056-23-5 Chlorobenzene 2.00 <2.00108-90-7 Chloroethane 2.00 <2.0075-00-3 Chloroform 2.00 <2.0067-66-3 Chloromethane 5.00 <5.0074-87-3 cis-1,2-Dichloroethene 2.00 <2.00156-59-2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Lab Sample ID:1805415-004A Client Sample ID:GP-4 Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2322h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual cis-1,3-Dichloropropene 2.00 <2.0010061-01-5 Cyclohexane 2.00 <2.00110-82-7 Dibromochloromethane 2.00 <2.00124-48-1 Dichlorodifluoromethane 2.00 <2.0075-71-8 Ethylbenzene 2.00 <2.00100-41-4 Isopropylbenzene 2.00 <2.0098-82-8 Methyl Acetate 5.00 <5.0079-20-9 Methyl tert-butyl ether 2.00 <2.001634-04-4 Methylcyclohexane 2.00 <2.00108-87-2 Methylene chloride 2.00 <2.0075-09-2 Naphthalene 2.00 <2.0091-20-3 Styrene 2.00 <2.00100-42-5 Tetrachloroethene 2.00 <2.00127-18-4 Toluene 2.00 <2.00108-88-3 trans-1,2-Dichloroethene 2.00 <2.00156-60-5 trans-1,3-Dichloropropene 2.00 <2.0010061-02-6 Trichloroethene 2.00 <2.0079-01-6 Trichlorofluoromethane 2.00 <2.0075-69-4 Vinyl chloride 1.00 <1.0075-01-4 Xylenes,Total 2.00 <2.001330-20-7 The pHof the sample was>2.Analysis was performed within the 7 day holding time. Surrogate CAS Result Amount Spiked %REC Limits QualUnits:µg/L 50.00 99.9Surr:1,2-Dichloroethane-d4 17060-07-0 72-15149.9 50.00 107Surr:4-Bromofluorobenzene 460-00-4 80-15253.4 50.00 97.5Surr:Dibromofluoromethane 1868-53-7 72-13548.8 50.00 104Surr:Toluene-d8 2037-26-5 80-12452.2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Client:Wasatch Environmental ORGANIC ANALYTICAL REPORT Contact:Rebecca Studenka Project:Clearfield Tire /1659-032B Lab Sample ID:1805415-005A Client Sample ID:GP-5 Collection Date:5/16/2018 Received Date:5/16/2018 Analytical Results VOAs AWAL List by GC/MS Method 8260C/5030C 1440h 1730h Test Code:8260-W Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2342h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual 1,1,1-Trichloroethane 2.00 <2.0071-55-6 1,1,2,2-Tetrachloroethane 2.00 <2.0079-34-5 1,1,2-Trichloro-1,2,2-trifluoroethane 2.00 <2.0076-13-1 1,1,2-Trichloroethane 2.00 <2.0079-00-5 1,1-Dichloroethane 2.00 <2.0075-34-3 1,1-Dichloroethene 2.00 <2.0075-35-4 1,2,4-Trichlorobenzene 2.00 <2.00120-82-1 1,2-Dibromo-3-chloropropane 5.00 <5.0096-12-8 1,2-Dibromoethane 2.00 <2.00106-93-4 1,2-Dichlorobenzene 2.00 <2.0095-50-1 1,2-Dichloroethane 2.00 <2.00107-06-2 1,2-Dichloropropane 2.00 <2.0078-87-5 1,3-Dichlorobenzene 2.00 <2.00541-73-1 1,4-Dichlorobenzene 2.00 <2.00106-46-7 2-Butanone 10.0 <10.078-93-3 2-Hexanone 5.00 <5.00591-78-6 4-Methyl-2-pentanone 5.00 <5.00108-10-1 Acetone 10.0 <10.067-64-1 Benzene 2.00 <2.0071-43-2 Bromodichloromethane 2.00 <2.0075-27-4 Bromoform 2.00 <2.0075-25-2 Bromomethane 5.00 <5.0074-83-9 Carbon disulfide 2.00 <2.0075-15-0 Carbon tetrachloride 2.00 <2.0056-23-5 Chlorobenzene 2.00 <2.00108-90-7 Chloroethane 2.00 <2.0075-00-3 Chloroform 2.00 <2.0067-66-3 Chloromethane 5.00 <5.0074-87-3 cis-1,2-Dichloroethene 2.00 <2.00156-59-2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Lab Sample ID:1805415-005A Client Sample ID:GP-5 Units:µg/L Dilution Factor:1 Analyzed:5/18/2018 2342h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual cis-1,3-Dichloropropene 2.00 <2.0010061-01-5 Cyclohexane 2.00 <2.00110-82-7 Dibromochloromethane 2.00 <2.00124-48-1 Dichlorodifluoromethane 2.00 <2.0075-71-8 Ethylbenzene 2.00 <2.00100-41-4 Isopropylbenzene 2.00 <2.0098-82-8 Methyl Acetate 5.00 <5.0079-20-9 Methyl tert-butyl ether 2.00 <2.001634-04-4 Methylcyclohexane 2.00 <2.00108-87-2 Methylene chloride 2.00 <2.0075-09-2 Naphthalene 2.00 <2.0091-20-3 Styrene 2.00 <2.00100-42-5 Tetrachloroethene 2.00 <2.00127-18-4 Toluene 2.00 <2.00108-88-3 trans-1,2-Dichloroethene 2.00 <2.00156-60-5 trans-1,3-Dichloropropene 2.00 <2.0010061-02-6 Trichloroethene 2.00 <2.0079-01-6 Trichlorofluoromethane 2.00 <2.0075-69-4 Vinyl chloride 1.00 <1.0075-01-4 Xylenes,Total 2.00 <2.001330-20-7 The pHof the sample was>2.Analysis was performed within the 7 day holding time. Surrogate CAS Result Amount Spiked %REC Limits QualUnits:µg/L 50.00 99.2Surr:1,2-Dichloroethane-d4 17060-07-0 72-15149.6 50.00 106Surr:4-Bromofluorobenzene 460-00-4 80-15253.2 50.00 97.5Surr:Dibromofluoromethane 1868-53-7 72-13548.8 50.00 105Surr:Toluene-d8 2037-26-5 80-12452.4 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Client:Wasatch Environmental ORGANIC ANALYTICAL REPORT Contact:Rebecca Studenka Project:Clearfield Tire /1659-032B Lab Sample ID:1805415-006A Client Sample ID:GP-6 Collection Date:5/16/2018 Received Date:5/16/2018 Analytical Results VOAs AWAL List by GC/MS Method 8260C/5030C 1540h 1730h Test Code:8260-W Units:µg/L Dilution Factor:1 Analyzed:5/19/2018 001h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual 1,1,1-Trichloroethane 2.00 <2.0071-55-6 1,1,2,2-Tetrachloroethane 2.00 <2.0079-34-5 1,1,2-Trichloro-1,2,2-trifluoroethane 2.00 <2.0076-13-1 1,1,2-Trichloroethane 2.00 <2.0079-00-5 1,1-Dichloroethane 2.00 <2.0075-34-3 1,1-Dichloroethene 2.00 <2.0075-35-4 1,2,4-Trichlorobenzene 2.00 <2.00120-82-1 1,2-Dibromo-3-chloropropane 5.00 <5.0096-12-8 1,2-Dibromoethane 2.00 <2.00106-93-4 1,2-Dichlorobenzene 2.00 <2.0095-50-1 1,2-Dichloroethane 2.00 <2.00107-06-2 1,2-Dichloropropane 2.00 <2.0078-87-5 1,3-Dichlorobenzene 2.00 <2.00541-73-1 1,4-Dichlorobenzene 2.00 <2.00106-46-7 2-Butanone 10.0 <10.078-93-3 2-Hexanone 5.00 <5.00591-78-6 4-Methyl-2-pentanone 5.00 <5.00108-10-1 Acetone 10.0 <10.067-64-1 Benzene 2.00 <2.0071-43-2 Bromodichloromethane 2.00 <2.0075-27-4 Bromoform 2.00 <2.0075-25-2 Bromomethane 5.00 <5.0074-83-9 Carbon disulfide 2.00 <2.0075-15-0 Carbon tetrachloride 2.00 <2.0056-23-5 Chlorobenzene 2.00 <2.00108-90-7 Chloroethane 2.00 <2.0075-00-3 Chloroform 2.00 <2.0067-66-3 Chloromethane 5.00 <5.0074-87-3 cis-1,2-Dichloroethene 2.00 <2.00156-59-2 3440 South 700 West Salt Lake City, UT 84119 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer    Lab Sample ID:1805415-006A Client Sample ID:GP-6 Units:µg/L Dilution Factor:1 Analyzed:5/19/2018 001h Method:SW8260C Analytical ResultCompound Reporting Limit CAS Number Qual cis-1,3-Dichloropropene 2.00 <2.0010061-01-5 Cyclohexane 2.00 <2.00110-82-7 Dibromochloromethane 2.00 <2.00124-48-1 Dichlorodifluoromethane 2.00 <2.0075-71-8 Ethylbenzene 2.00 <2.00100-41-4 Isopropylbenzene 2.00 <2.0098-82-8 Methyl Acetate 5.00 <5.0079-20-9 Methyl tert-butyl ether 2.00 <2.001634-04-4 Methylcyclohexane 2.00 <2.00108-87-2 Methylene chloride 2.00 <2.0075-09-2 Naphthalene 2.00 <2.0091-20-3 Styrene 2.00 <2.00100-42-5 Tetrachloroethene 2.00 <2.00127-18-4 Toluene 2.00 <2.00108-88-3 trans-1,2-Dichloroethene 2.00 <2.00156-60-5 trans-1,3-Dichloropropene 2.00 <2.0010061-02-6 Trichloroethene 2.00 <2.0079-01-6 Trichlorofluoromethane 2.00 <2.0075-69-4 Vinyl chloride 1.00 <1.0075-01-4 Xylenes,Total 2.00 <2.001330-20-7 The pHof the sample was>2.Analysis was performed within the 7 day holding time. Surrogate CAS Result Amount Spiked %REC Limits QualUnits:µg/L 50.00 100Surr:1,2-Dichloroethane-d4 17060-07-0 72-15150.1 50.00 107Surr:4-Bromofluorobenzene 460-00-4 80-15253.4 50.00 97.0Surr:Dibromofluoromethane 1868-53-7 72-13548.5 50.00 106Surr:Toluene-d8 2037-26-5 80-12452.8 Appendix C Soil Gas Analytical Results ANALYTICAL REPORT Rebecca Studenka Wasatch Environmental, Inc. 2410 West California Ave Salt Lake City, UT 84104 Phone: Fax: E-mail: (801) 972-8400 (801) 972-8459 rs@wasatch-environmental.com Report Date:May 23, 2018 34-1813740Workorder: Clearfield Tire 051618 Clearfield TirePurchase Order: Project ID: Project Manager Kevin W. Griffiths Sampling SiteReceive DateCollect DateLab IDClient Sample ID 1813740001 05/16/18SG-1 05/16/18 Clearfield Tire 1813740002 05/16/18SG-2 05/16/18 Clearfield Tire Page 1 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 ADDRESS 960 West LeVoy Drive, Salt Lake City, Utah, 84123 USA PHONE FAX+1 801 266 7700 +1 801 268 9992 ALS GROUP USA, CORP.An ALS Limited Company || ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 Analytical Results Sample ID:05/16/2018 05/16/20181813740001Lab ID: Collected: Received: SG-1 Clearfield Tire Sampling Parameter:Air Volume 6 LMatrix: Media: Air Summa 6 Liter Canister Sampling Site: Analysis:EPA TO-15, Air Analyzed:05/18/2018 07:32 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 5.0<7.4ND 1.5 UDichlorodifluoromethane10 5.0<3.1ND 1.5 UChloromethane10 5.0<10ND 1.5 UFreon 114 10 5.0<3.8ND 1.5 UVinyl chloride 10 5.0<3.3ND 1.5 U1,3-Butadiene 10 5.0<5.8ND 1.5 UBromomethane10 5.0<4.0ND 1.5 UChloroethane10 5.0<8.4ND 1.5 UFreon 11 10 5.0<11ND 1.5 UFreon 113 10 5.09.72.4 1.5 J1,1-Dichloroethene 10 5.038121.5Carbon disulfide 10 5.0<5.2ND 1.5 UMethylene chloride 10 5.0<5.9ND 1.5 Utrans-1,2-Dichloroethene 10 5.0<5.4ND 1.5 UMethyl t-butyl ether 10 5.0<7.0ND 2.0 UVinyl acetate 10 5.0130451.52-Butanone 10 5.0330841.5cis-1,2-Dichloroethene 10 5.0<6.1ND 1.5 U1,1-Dichloroethane 10 10<11ND 3.0 UEthyl acetate 10 5.08602401.5Hexane 10 5.0<7.3ND 1.5 UChloroform10 5.0<4.4ND 1.5 UTetrahydrofuran10 5.0<6.1ND 1.5 U1,2-Dichloroethane 10 5.0<8.2ND 1.5 U1,1,1-Trichloroethane 10 5.0<9.4ND 1.5 UCarbon tetrachloride 10 5.075241.5Benzene 10 5.07102101.5Cyclohexane 10 5.010001901.5Trichloroethene 10 5.0<7.3ND 1.5 U1,2-Dichloropropane 10 5.0<10ND 1.5 UBromodichloromethane10 5.05001201.5Heptane 10 5.0<6.8ND 1.5 Ucis-1,3-Dichloropropene 10 5.075181.54-Methyl-2-pentanone 10 5.0<6.8ND 1.5 Utrans-1,3-Dichloropropene 10 Page 2 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 Results Continued on Next Page ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 Analytical Results Sample ID:05/16/2018 05/16/20181813740001Lab ID: Collected: Received: SG-1 Clearfield Tire Sampling Parameter:Air Volume 6 LMatrix: Media: Air Summa 6 Liter Canister Sampling Site: Analysis:EPA TO-15, Air Analyzed:05/18/2018 07:32 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 5.0<8.2ND 1.5 U1,1,2-Trichloroethane 10 5.013003401.5Toluene 10 10<13ND 3.2 U2-Hexanone 10 5.0314.5 1.5 JTetrachloroethene10 5.0<13ND 1.5 UDibromochloromethane10 5.0<12ND 1.5 U1,2-Dibromoethane 10 5.0<6.9ND 1.5 UChlorobenzene10 5.0150361.5Ethyl benzene 10 108001803.0m,p-Xylene 10 5.04401001.5o-Xylene 10 10<13ND 3.0 UStyrene10 10<31ND 3.0 UBromoform10 5.0<10ND 1.5 U1,1,2,2-Tetrachloroethane 10 10418.4 3.0 J4-Ethyl toluene 10 10110223.01,3,5-Trimethylbenzene 10 1099203.01,2,4-Trimethylbenzene 10 10<18ND 3.0 U1,3-Dichlorobenzene 10 10<18ND 3.0 U1,4-Dichlorobenzene 10 10<19ND 3.7 UBenzyl chloride 10 10<18ND 3.0 U1,2-Dichlorobenzene 10 10<31ND 4.2 U1,2,4-Trichlorobenzene 10 10<32ND 3.0 UHexachlorobutadiene10 Analysis:EPA TO-15, Air Analyzed:05/18/2018 09:56 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 1006800290030Acetone 100 Analysis:EPA TO-15, Air Analyzed:05/18/2018 07:32 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Tentatively Identified Compound Retention Time Dilution Qual Analysis Method - EPA TO-15 J5.011300 10Propene Page 3 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 Results Continued on Next Page ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 Analytical Results Sample ID:05/16/2018 05/16/20181813740001Lab ID: Collected: Received: SG-1 Clearfield Tire Sampling Parameter:Air Volume 6 LMatrix: Media: Air Summa 6 Liter Canister Sampling Site: Analysis:EPA TO-15, Air Analyzed:05/18/2018 07:32 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Tentatively Identified Compound Retention Time Dilution Qual Analysis Method - EPA TO-15 J5.601500 101-Propene, 2-methyl- J6.78810 10Isopropyl Alcohol J8.60160 10Butane, 2,3-dimethyl- J8.68360 10Pentane, 2-methyl- J9.073700 102-Propanethiol, 2-methyl- J10.26540 10Cyclopentane, methyl- J11.38140 10Pentane, 2,3-dimethyl- J11.54180 10Hexane, 3-methyl- J11.94390 10Pentane, 2,2,4-trimethyl- J12.54150 10Propane, 2-methyl-2-(methylthio)- J12.85210 10Cyclohexane, methyl- J13.54230 10Pentane, 2,3,4-trimethyl- J14.3297 10Hexane, 2,2,5-trimethyl- Sample ID:05/16/2018 05/16/20181813740002Lab ID: Collected: Received: SG-2 Clearfield Tire Sampling Parameter:Air Volume 6 LMatrix: Media: Air Summa 6 Liter Canister Sampling Site: Analysis:EPA TO-15, Air Analyzed:05/18/2018 08:22 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 5.0<7.4ND 1.5 UDichlorodifluoromethane10 5.0<3.1ND 1.5 UChloromethane10 5.0<10ND 1.5 UFreon 114 10 5.0<3.8ND 1.5 UVinyl chloride 10 5.0<3.3ND 1.5 U1,3-Butadiene 10 5.0<5.8ND 1.5 UBromomethane10 5.0<4.0ND 1.5 UChloroethane10 5.0<8.4ND 1.5 UFreon 11 10 5.0<11ND 1.5 UFreon 113 10 5.0<5.9ND 1.5 U1,1-Dichloroethene 10 5.07.52.4 1.5 JCarbon disulfide 10 Page 4 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 Results Continued on Next Page ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 Analytical Results Sample ID:05/16/2018 05/16/20181813740002Lab ID: Collected: Received: SG-2 Clearfield Tire Sampling Parameter:Air Volume 6 LMatrix: Media: Air Summa 6 Liter Canister Sampling Site: Analysis:EPA TO-15, Air Analyzed:05/18/2018 08:22 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 5.0<5.2ND 1.5 UMethylene chloride 10 5.0<5.9ND 1.5 Utrans-1,2-Dichloroethene 10 5.0<5.4ND 1.5 UMethyl t-butyl ether 10 5.0<7.0ND 2.0 UVinyl acetate 10 5.058201.52-Butanone 10 5.0<6.1ND 1.5 U1,1-Dichloroethane 10 10<11ND 3.0 UEthyl acetate 10 5.0246.9 1.5Hexane 10 5.0<7.3ND 1.5 UChloroform10 5.0<4.4ND 1.5 UTetrahydrofuran10 5.0<6.1ND 1.5 U1,2-Dichloroethane 10 5.0<8.2ND 1.5 U1,1,1-Trichloroethane 10 5.0<9.4ND 1.5 UCarbon tetrachloride 10 5.0288.8 1.5Benzene 10 5.0<5.2ND 1.5 UCyclohexane10 5.014002601.5Trichloroethene 10 5.0<7.3ND 1.5 U1,2-Dichloropropane 10 5.0<10ND 1.5 UBromodichloromethane10 5.045111.5Heptane 10 5.0<6.8ND 1.5 Ucis-1,3-Dichloropropene 10 5.0160401.54-Methyl-2-pentanone 10 5.0<6.8ND 1.5 Utrans-1,3-Dichloropropene 10 5.0<8.2ND 1.5 U1,1,2-Trichloroethane 10 5.0170451.5Toluene 10 10<13ND 3.2 U2-Hexanone 10 5.029004201.5Tetrachloroethene 10 5.0<13ND 1.5 UDibromochloromethane10 5.0<12ND 1.5 U1,2-Dibromoethane 10 5.0<6.9ND 1.5 UChlorobenzene10 5.0190431.5Ethyl benzene 10 107101603.0m,p-Xylene 10 5.0200461.5o-Xylene 10 10<13ND 3.0 UStyrene10 10<31ND 3.0 UBromoform10 Page 5 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 Results Continued on Next Page ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 Analytical Results Sample ID:05/16/2018 05/16/20181813740002Lab ID: Collected: Received: SG-2 Clearfield Tire Sampling Parameter:Air Volume 6 LMatrix: Media: Air Summa 6 Liter Canister Sampling Site: Analysis:EPA TO-15, Air Analyzed:05/18/2018 08:22 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 5.0<10ND 1.5 U1,1,2,2-Tetrachloroethane 10 10<15ND 3.0 U4-Ethyl toluene 10 10163.2 3.0 J1,3,5-Trimethylbenzene 10 10214.3 3.0 J1,2,4-Trimethylbenzene 10 10<18ND 3.0 U1,3-Dichlorobenzene 10 10<18ND 3.0 U1,4-Dichlorobenzene 10 10<19ND 3.7 UBenzyl chloride 10 10<18ND 3.0 U1,2-Dichlorobenzene 10 10<31ND 4.2 U1,2,4-Trichlorobenzene 10 10<32ND 3.0 UHexachlorobutadiene10 Analysis:EPA TO-15, Air Analyzed:05/18/2018 10:48 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Analyte Result (ug/m³)MDL (ppb)QualRL (ppb)Dilution Analysis Method - EPA TO-15 10014000580030 EAcetone100 50380095015cis-1,2-Dichloroethene 100 Analysis:EPA TO-15, Air Analyzed:05/18/2018 08:22 Batch: Instrument ID: IVOA/4007 (HBN: 215300)Percent Solid:NA 5975-K Report Basis:Wet Preparation:Not Applicable Result (ppb)Tentatively Identified Compound Retention Time Dilution Qual Analysis Method - EPA TO-15 J5.61200 101-Propene, 2-methyl- J6.791900 10Isopropyl Alcohol J11.5421 10Hexane, 3-methyl- J12.5454 10C8 Hydrocarbon J21.9924 106-Dodecene, (E)- Comments Workorder:1813740 TO-15 Comment; Compounds flagged with an "E" qualifier should be considered semiquantitative. Page 6 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 Report Authorization Analyst Peer ReviewMethod (/S/ is an electronic signature that complies with 21 CFR Part 11) EPA TO-15 /S/ Benson Boy 05/22/2018 13:29 05/23/2018 13:54 /S/ Lisa M. Reid Laboratory Contact Information (801) 266-7700 alslt.lab@ALSGlobal.com www.alsslc.com ALS Environmental 960 W Levoy Drive Salt Lake City, Utah 84123 Phone: Email: Web: The results provided in this report relate only to the items tested. Samples were received in acceptable condition unless otherwise noted. Samples have not been blank corrected unless otherwise noted. This test report shall not be reproduced, except in full, without written approval of ALS. General Lab Comments ALS provides professional analytical services for all samples submitted. ALS is not in a position to interpret the data and assumes no responsibility for the quality of the samples submitted. All quality control samples processed with the samples in this report yielded acceptable results unless otherwise noted. ALS is accredited for specific fields of testing (scopes) in the following testing sectors. The quality system implemented at ALS conforms to accreditation requirements and is applied to all analytical testing performed by ALS. The following table lists testing sector, accreditation body, accreditation number and website. Please contact these accrediting bodies or your ALS project manager for the current scope of accreditation that applies to your analytical testing. Testing Sector Accreditation Body Certificate Number Website Environmental PJLA (DoD ELAP) Utah (TNI) Nevada Oklahoma Iowa Page 7 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8 ANALYTICAL REPORT Project Manager:Kevin W. Griffiths Client:Wasatch Environmental, Inc. Workorder:34-1813740 MDL = Method Detection Limit, a statistical estimate of method/media/instrument sensitivity. RL = Reporting Limit, a verified value of method/media/instrument sensitivity. CRDL = Contract Required Detection Limit Reg. Limit = Regulatory Limit. ND = Not Detected, testing result not detected above the MDL or RL. < This testing result is less than the numerical value. ** No result could be reported, see sample comments for details. U = Qualifier indicates that the analyte was not detected above the MDL. J = Qualifier Indicates that the analyte value is between the MDL and the RL. It is also used to indicate an estimated value for tentatively identified compounds in mass spectrometry where a 1:1 response is assumed. B = Qualifier indicates that the analyte was detected in the blank. E = Qualifier indicates that the analyte result exceeds calibration range. P = Qualifier indicates that the RPD between the two columns is greater than 40%. Result Symbol Definitions Qualifier Symbol Definitions Page 8 of 8 Wed, 05/23/18 1:57 PM ENVREP-V4.8