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i28 January 2004 . AGE-NC Project No 97-0230 Page 5 of 8 No additional analytes were detected, analytical results of soil samples are summarized in Tables 1 and 2 The laboratory report(Castle Analytical Laboratory report nos 6211 and 6212)and chain-of- custody are included in Appendix B 3 4 ANALYTICAL RESULTS OF GRAB GROUND WATER SAMPLE One grab ground water sample was collected from boring P-9 and submitted to a DHS-certified laboratory (Castle Analytical Laboratory) for analysis Utilizing EPA method 8015M, TPH-d and I TPH-mo were detected at concentrations of 3,600 micrograms per liter (p.g/1) and 17,000 pg/l, respectively TPH-g was not detected from the grab ground water sample analysis Utilizing EPA method 8020, the BTEX compound benzene was detected at a concentrations of 0 64 µg/1 The BTEX compounds toluene, ethylbenzene and xylene were not detected from the analysis method 826Q the fuel additive MTBE was detected at a concentration of 0 59 1, Utilizing EPA et µ� lie1,2-DCA was detected at a concentration of 12 µg/1 No additional analytes were detected, analytical results of the grab ground water sample are summarized In Tables 3 and 4 The laboratory report(Castle Analytical Laboratory report no 6211) and chain-of-custody are included in Appendix B s ' 4.0. PETROLEUM HYDROCARBON DISTRIBUTION IN SOIL I Between August 1999 and October 2003, twelve soil borings (P-i through P-12) and three ground water monitoring wells (MW-1 through MW-3) were installed at the site as part of an ongoing subsurface investigation (Tables 1Ind 2) A total of 58 soil samples have been collected at the site VM at depths ranging from 5 feet to 9 feet bsg and submitted for laboratory analysis of petroleum ' hydrocarbons, TPH-g/d/mo, BTEX constituents and MTBE were detected in 14 of the 58 soil samples analyzed The highest concentrations of petroleum hydrocarbon-impacted soil was ' encountered between 10 and 35 feet bsg at soil boring P-3, with TPH-g concentrations detected as high as 60 mg/kg, TPH-d as high as 1 6 mg/kg, BTEX compounds as high as 4 4 mg/kg (xylenes) Vh� is,— and MTBE as high as 39 mg/kg eQ 1, Based on the existing data,there appears to be three separate TPH-g/d/mo and four MTBELimpacted soil areas Area No 1 appears to have a lateially-limited extent for TPH-g/d/mo/nd MTBE- impacted soil consisting of soil borings P-1,T-1j)and tank removal soil sample'TK2 N,,the vertical extent of area no 1-impacted soil does not appear to extend beyond 20 feet bsg Area no 2 appears ' to have a laterally-limited extent for TPH-g and MTBE-impacted soil consisting of soil borings P-3 Advanced GeoPnviron mental,Inc 1