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I 01 March 2002 AGE-NC Project No 95-0130 Page 7of10 Various BTEX compounds were detected in the same five MW-6 soil samples at concentrations as high as 140 mg/kg The greatest benzene concentration was detected in the 43-foot soil sample collected from MW-6 at 14 mg/kg MTBE was detected in two MW-6 soil samples collected between 37 feet and 43 feet bsg at concentrations as high as 3 3 mg/kg Analytical results of the soil samples are summarized in Table 1 The laboratory reports(McCampbell Analytical Inc Lab I D 80026 through 80038) and chain-of- custody forms are presented in Appendix F Analytical results of MW-6 and MW-7 soil samples are depicted in cross sectional views B-B'and C-C'(F>gures 9 and 10) 3 5 LABORATORY RESULTS OF INITIAL MULTI-LEVEL WELL WATER SAMPLES A total of eight ground water samples were submitted to a DHS-certified laboratory in October 2001 � �' p rY TPH-g was detected in water samples collected from well MW-6 (B, C, D and E) at concentrations as high as 7,900 micrograms per liter(µg/l) and MW-7 (B, C, D and E) at concentrations as high as 160,000 micrograms per liter(µg11) BTEX compounds were detected in ground water samples collected from well MW-6 (B, C, D and E) at concentrations as high as 2,200µg/1 (1\4W-6B, benzene) and from MW-7 (B, C, D and E) at concentrations as high as 38,000 µg/1 (MW-7B, benzene) MTBE was detected in ground water samples collected from MW-6 (B and C) at concentrations as high as 130µgll and from MW-7 (B, C and D) at concentrations as high as 420µg/1, 1,2-DCA was detected in samples collected from MW-6 (B and C) at concentrations as high as 37 µg/l and from MW-7B at a concentration of 210µg11 No other fuel oxygenated or lead scavenger compounds were detected above the laboratory reporting limits Analytical results of the ground water samples are summarized In Table 2 The laboratory reports (McCampbell Analytical Inc I D No 83008 through 883015 and Castle Analytical Laboratory Reference No 4187) and chain-of-custody forms are presented in Appendix G 4.0. SUMMARY AND CONCLUSIONS The implications of the September and October 2001 investigation results are as follows • Geologic cross sections B-B' and C-C' were generated from previous investigation and continuous-core sampling data collected from MW-6 and MW-7 and depict general lrthology beneath the site in cross sectional view (Figures 3 and 4,respectively) Permeable lithology iconsisting of poorly graded, unconsolidated, fine to medium sand was observed at depths Advanced Geo Environmental,Inc I