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U ound Storage Tank Removal Report <br /> 730 E.Channel Street,Stockton,CA <br /> Page 4 <br /> collected from beneath the southern end of the tank pit. TPH-G and TPH-D were also detected at <br /> concentrations of 2.0 and 200 mg/kg,respectively, in sample "Filter" collected from beneath the location <br /> of the diesel filter. TPH-G was also detected in the composite soil sample "Stockpile-(N,S)" at a <br /> concentration of 120 mg/kg. 1,1-Dichloroethane (1,I-DCA), ethyl benzene, p-isopropyltoluene, <br /> naphthalene, n-propylbenzene, tetrachloroethene ' (PCE), toluene, 1,2,4-trimethylbenzene, 1,3,5- <br /> trimethylbenzene, and total xylenes were also detected in sample "SouthTK-8"'. N-Butylbenzene, ethyl <br /> benzene, naphthalene, n-propylbenzene, 1,2,4-trimethylbenzene, 1,3,5-trimethyIbenzene, and total <br /> xylenes were also detected in sample "Filter". None of the other requested analytes were detected at or <br /> above the laboratory reported detection limits in these samples. However, the laboratory reported <br /> detection limit was raised for all analytes in sample"SouthTK-8"'. <br /> TABLE 2—Sail Salm le Laboratory Analytical Results (April 29 2003 <br /> Sample ID: orthTK-8'SouthTK-8' Trench-N Dispenser Filter Trench-E Stockpile-(N,S) <br /> Date: 4/29/2003 4/29/2003 4!2912003 4/29/2003 4/29/2003 4/29/2003 4/29/2003 <br /> Constituent Analytical nits PRG <br /> Method <br /> M <br /> 0100 mg/kg 31 NA <2.5 NA NA NA NA NA <br /> 010 rng/kg 0.39*122** NA 3.4 NA NA NA NA NA <br /> 010C mg/kg 5400 NA 140 NA NA NA NA NA <br /> 01 OC mg/kg 150 NA 0.57 NA NA NA NA NA <br /> 010C mg/kg 37 NA <0.5 NA NA NA NA NA <br /> 01 OC mg/kg 210 NA 32 NA NA NA NA NA <br /> 010C mg/kg 900 NA II NA NA NA NA NA <br /> Copper 6010C mg/kg 3100 NA 28 NA NA NA NA NA <br /> Lead 7420/60IOC mg/kg 150 18 33 26 790 28 25 250 <br /> Mercury 7471A mg/kg 23 NA <0,06 NA NA NA NA NA <br /> Molybdenum 60 OC mg/kg 390 NA <2.5 NA NA NA NA NA <br /> Nickel 601 OC mg/kg 1600 NA 32 NA NA NA NA NA <br /> Selenium 7010 mg/kg 390 NA <2.5 NA NA NA NA NA <br /> Silver 6010C mg/kg 390 NA <lA NA NA NA NA NA <br /> Thallium 7010 mg/kg 5.2 NA <2.5 NA NA NA NA NA <br /> Vanadium 6010C mg/kg 550 NA 53 NA NA NA NA NA <br /> Zioc 60100 mg/kg 23000 NA 100 NA NA NA NA NA <br /> PRG:United States Environmental Protection Agency,Region IX,Preliminary Remediation Goal(residential) <br /> Cancer endpoint PRG,where noncancer PRG< 100X cancer PRG <br /> *'Non-cancer endpoint PRG <br /> Concentrations in bold print are above the PRG for that constituent. <br /> Unit Conversions <br /> mg/kg:milligmrns per kilogram,parts per million <br /> The total lead concentrations detected in soil samples "Dispenser" and "Stockpile-(N,S)" are above the <br /> 150 mg/kg California-modified U.S. EPA Region IX Preliminary Remediation Goal (PRG) value <br /> established for residential soils. <br /> CONDOR <br />