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i lie 20 December 2001 AGE-NC Project No 95-0144 Page 2 of 7 ' Four soil probe borings (probmgs GP5 to GP8) were advanced near the former location of UST No 1, a 250-gallon waste oil tank Petroleum hydrocarbons were detected in a soil sample collected from a depth of 15 feet bsg directly below the former UST location Petroleum hydrocarbons were ' not detected at depths of 20 and 25 feet bsg below the former UST No 1 nor in samples collected from three probmgs approximately 15 feet from the former UST location Hydrocarbons were not detected in a grab ground water sample collected from beneath the UST location ' Four robe boriii s GP9 to GP 12 were advanced near the former location of UST No 2 a 1,000- gallon g � ) > ' gallon waste oil tank Analytical results and field observations indicated that soil and water in the vicinity of UST No 2 were not adversely effected by the operation of the UST Details of the soil investigation were described m the Quarterly Report-June 1995 prepared by AGE ' Between September and November 1995, monitoring wells MW-11, MW 12, MW-13 and MW-18 were installed at the site Petroleum hydrocarbons were not detected in the analyzed soil samples collected during advancment of the pilot borings Procedures and results were summarized in Quarterly Report -December 1995 prepared by AGE . In January 1996, two in-situ air sparging wells (IAS-1 and IAS-2)were installed at the site An in- situ air spargmg (IAS) pilot test was performed at the site in February 1996 Increased induced pressure, organic vapor, ground water elevation and dissolved oxygen were generally measured at ' monitoring wells throughout the test Procedures and results were summarized in the Corrective Action Plan - February 1996 prepared by AGE ' In June 1998, three dual-completed wells (MW-19, MW-20 and MW-21) were installed near the former UST No 8 Petroleum hydrocarbons were detected in soil samples collected from pilot borings MW-19 and MW-21 Procedures and results were summarized in Quarterly Report-August ' 1998, dated 08 December 1998, prepared by AGE In March 2001, two ground water extraction wells (EW-1 and EW-2) were in stalled at the former ' UST No 8 location Additionally, approximately 110 cubic yards of petroleum hydrocarbon- impacted soil were excavated from the former UST No 1 (waste oil) area Soil samples were ' collected from the floor and sidewalk of the excavation and from the stockpiled soil TPH-g, TPH-d and TPH-mo were detected in samples collected from the stockpile Toluene was detected in the ` sample collected from the south wall at a concentration of 0 016 mg/kg TPH-d was detected in the ' floor sample at a concentration of 1 1 mg/kg No other petroleum hydrocarbon contamination was detected in the five soil samples collected from the excavation Procedures and results were summarized in Quarterly Report-First Quarter 2001, dated 23 May 2001, prepared by AGE ' An aquifer pumping test was performed at the UST No 8 location utilizing EW 1 in May 2001 iResults of the test indicated that ground water extraction would be a feasible remediation alternative Advanced Geo$nvironmental,Lac