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' Site Background Information • PREM DOR ' 433 West Scotts Street, Stockton, California collected from all three borings at maximum concentrations of 550 µg/l (B3), 23,000 µg/1 (111), 6,100 µg/1(B 1) and 33,000µg/l(Bl),respectively 1,2-DCA was detected in groundwater samples collected from all three borings at a maximum concentration of 54 µg/1 in sample 133 EDB was detected in ground water samples collected from all three bonngs at a maximum concentration of 190 µ.g/l in sample B2 No additional target analytes were detected at or above laboratory detection limits in the ground water samples analyzed ' Four soil borings, MW1, 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 and MW-3), B4 was properly abandoned with a grout slurry to EHD specifications Pilot borings MWl, MW2 and MW3 were completed as ground water monitoring wells using 2-inch diameter FVC 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 . 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 borings B4 and MW2 at maximum concentrations of 0 044 mg/kg (MW2-35), 0 27 mg/kg (MW2-35), 0 15 mg/kg (B4-25) and 0 35 mg/kg (MW2-35), respectively Total lead was detected in all samples analyzed from borings 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(µg11)and 11.,000 ug/l,respectively Benzene,toluene, ethylbenzene and total xylenes were detected in the ground water sample collected from boring B4 at concentrations of 11 µg/l,260 gg/l,430µg/1 and 2,650µg/1,respectively The lead scavenger 1,2- DCA was detected in the groundwater sample collected from boring B4 at concentration of 2 2 µg/1 INo additional analytes were detected at or above laboratory reporting limits • Advanced GeoEnvironmental,Inc