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' Project No S8080-06-01C r August 31, 1994 1 ' Uriah performed eight additional borings (EB-4 through EB-11) at the site between December 1991 and April 1992 The borings were extended to depths between 60 and 70 feet bgs A ' review of the laboratory test results indicate that TPHg, TPHd and BTEX concentrations were not reported for soil samples collected from borings EB-4 and EB-7 located at the ' southwestern site boundary TPHg and TPHd concentrations ranging from 1 5 to 200 mg/Kg ' were reported for soil samples obtained from depths between 21 and 41 feet bgs in boring EB- 5 located in the central portion of the parking area TPHg concentrations at or below 26 ' mg/Kg were reported for soil samples collected at depths between 25 and 45 feet bgs in Iborings EB-6 and EB-9 located in the southeastern portion of the site TPHg concentrations ranging between 3 8 and 11,000 mg/Kg and TPHd concentrations between 47 and 2,400 mg/Kg were reported for soil samples collected at depths between 15 and 35 feet bgs in borings EB-8 and EB-11, respectively Laboratory test results were not reported for boring EB-10 The laboratory test results reported by Uriah for soil samples collected from borings ' SB-1, SB-2, SB-3, EB-4 through EB-9, and EB-11 are summarized on Table I ' Uriah completed borings EB-7, EB-9 and EB-10 as groundwater monitoring wells MW-1, MW- ' 2 and MW-3, respectively The monitoring wells were reportedly sampled by Uriah in July 1992 and January 1993 Groundwater was encountered at depths between 55 and 56 feet bgs ' with a reported southwesterly groundwater flow direction The results of the reported ' groundwater sample analyses indicate that TPHg was detected in each well at concentrations - 17 -