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i ISite Background Information Prem Dor Page 3 of 7 - A total of 13 soil samples were analyzed for petroleum hydrocarbon products TPH-g was detected I in soil samples collected from borings B4 and MW2 at concentrations of 12 milligrams per kilogram (mg/kg)(B4-25)and 18 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 MWIthrough MW3 at concentrations ranging from 6 3 mg/kg (MW2-35) to 15 mg/kg (MW1-35), total lead was not Idetected 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 detection limits in the samples analyzed One grab ground water sample(B4-H20)collected from boring B4 at an approximate depth of 53 feet bsg and analyzed for petroleum hydrocarbon products TPH-g and TPH-d were detected in the ground water sample collected from boring B4 at a concentration of 14,000 micrograms per titer (µg/1)and 11,000µg/1,respectively Benzene,toluene,ethylbenzene and total xylenes were detected in the ground water sample collected from boring B4 at concentrations of 11 µg/1,260µg/1,430 µg/l ' and 2,650 µg11,respectively The lead scavenger 1,2-DCA was detected in the ground water sample collected from boring B4 at concentration of 2 2 µg/1 No additional analytes were detected at or above laboratory detection limits in the sample analyzed On 19 and 25 July 2005, two soil probe borings (B5 and B6) were advanced to a total depth of 35 feet bsg to the north and south of the site, respectively,utilizing a van-mounted Geoprobe 5400 direct-push probing unit Groundwater was encountered at approximately 19 feet bsg,a grab ground water sample was collected at 30 feet bsg in boring B5 and 25 feet bsg in boring B6 TPH-d was detected in sample B5-W, collected between 20 feet and 30 feet bsg, at a concentration of ' 19,000 µg/1 Soil samples were collected and analyzed for petroleum hydrocarbon constituents, no constituents of concern were detected at or above laboratory reporting limits in the soil samples analyzed IOn 20 July ,one paired aired soil boring(CPT-1)was advanced on-site to a total depth of 97 feet bsg for cone penetrometer testing Grab ground water samples were collected in a twin boring advanced rimmediately adjacent to the initial CPT sounding Three grab ground water samples were collected and analyzed for petroleum hydrocarbon constituents, no constituents of concern were detected at ' or above laboratory reporting hnuts On 21 July 2005, a LAR drill ng was utilized to advance pilot soil borings MW-4 and MW-5 to a ' total depth of 35 feet below surface grade (bsg) using 8-inch diameter hollow-stem augers Pilot borings MW-4 and MW-5 were completed as ground water monitoring wells of the same designations using 2-inch diameter polyvmylchlonde(PVC)casing with a 0 020-inch slotted screen ' installed from 15 feet to 35 feet bsg Soil samples were collected and analyzed for petroleum hydrocarbon constituents,no constituents of concern were detected at or above laboratory reporting limits in the soil samples analyzed ' Advanced GeoEnvironmental,Inc. I