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i Site Background Information • PREM DOR 433 West Scotts Street, Stockton, California collected from all three borings at maximum concentrations of 550 µg/1 (B3), 23,000 gg/l (131), 6,100 gg/1(B1)and 33,000 gg/l(B1),respectively 1,2-DCA was detected in ground water samples collected from all three borings at a maximum concentration of 54 µg/1 in sample B3 EDB was detected in ground water samples collected from all three borings at a maximum concentration of I190 gg/1 in sample B2 No additional target analytes were detected at or above laboratory detection limits in the ground water samples analyzed IFour soil borings, MWI, MW2, MW3 and B4 were advanced on 09, 10 and 16 October 2003 for collection of soil samples and installation of three ground water monitoring wells (MW-1, MW-2 I and MW-3), B4 was properly abandoned with a grout slurry to EHD specifications Pilot borings MW1, MW2 and MW3 were completed as ground water monitoring wells using 2-inch diameter PVC casing,with 0 020-inch slotted screen installed from approximately 14 feet to 34 feet bsg The filter pack (No 2/12 Lonestar sand) was installed from approximately 12 feet to 34 feet bsg, and a nominal 2-foot bentonite chip plug was then installed above the filter pack and hydrated The wells were then grouted to near the surface with portland cement,and water-tight,traffic-rated well boxes were installed over the wells A total of 13 soil samples were analyzed for TPH-g, TPH-d, BTEX, five fuel additives, lead I scavengers and total lead TPH-g was detected in soil samples collected from borings B4 and MW2 at concentrations of 12 milligrams per kilogram (mg/kg) (B4-25) and 1 8 mg/kg (MW2-35) Benzene, toluene, ethylbenzene and total xylenes were detected in soil samples collected from Ibonngs B4 and MW2 at maximum concentrations of 0 044 mg/kg (MW2-35), 0 27 mg/kg (MW2-35), 0 15 mglkg(134-25) and 0 35 mg/kg (MW2-35), respectively Total lead was detected in all samples analyzed from bonngs MW 1 through MW3 at concentrations ranging from 6 3 mg/kg (MW2-35)to 15 mg/kg(MW 1-35), total lead was not detected above the laboratory detection level or 5 0 mg/kg in the samples analyzed from B4 No additional analytes were detected at or above laboratory reporting limits One"grab" ground water sample(B4-H20) was taken from boring B4 at an approximate depth of 53 feet bsg and was analyzed for TPH-g, TPH-d, BTEX, five fuel additives and lead scavengers TPH-g and TPH-d were detected in the ground water sample collected from boring B4 at a concentration of 14,000 micrograms per liter(µg/1)and 11,000 gg/l,respectively Benzene,toluene, ethylbenzene and total xylenes were detected m the ground water sample collected from boring B4 at concentrations of 11 µg/1,260 gg/l,430 µg/1 and 2,650 gg/l,respectively The lead scavenger 1,2- DCA was detected in the ground water sample collected from boring B4 at concentration of 2 2 pg/1 No additional analytes were detected at or above laboratory reporting limits I Advanced GeoEnvironmeatal,Inc