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' 15 June 2004 AGE-NC Prod ect No 01-0815 ' Page 7 of 8 ' summarized on Table 4 The laboratory report (CTEL Lab Project No CT214-0404004), QA/QC report and chain-of-custody form are included in Appendix G A plane view map depicting the lateral extent of petroleum hydrocarbon contamination are included in Figure 9 Cross sectional ' views showing the extent of dissolved petroleum hydrocarbon contamination are included in Figures 10 and 11 4.0. SUMMARY AND CONCLUSIONS ' Based on the data collected from the site, AGE concludes • Generally, an orange-brown, dry, clayey silt (fill material),was encountered from'surface grade to approximately 6 feet bsg Orange brown to brown, dry, silts and clayey silts were encountered from approximately 6 feet bsg to 26 feet bsg Orange brown to blue grey hydrocarbon stained, slightly moist, clay was encountered from approximately 26 feet to 36 I feet bsg in MW I, MW2 and MW3 and from 20 to 24 feet bsg in the area of MW4 Gray hydrocarbon stained, moist to saturated silty sand was encountered from approximately 36 feet bsg to 53 feet bsg Blue hydrocarbon stained,clay was encountered from approximately I53 feet bsg to 55 feet bsg • TPH-g was detected in soil samples collected from borings MW1 through MW4 at a I maximum concentration of 5 7 mg/kg (MW3-45), BTEX compounds were detected at maximum concentrations of 0 054 mg/kg benzene, 0 072 mg/kg toluene, 0 12 mg/kg ethylbenzene and 0 20 mg/kg total xylenes • MTBE was detected in soil samples collected from borings MW2 and MW4 at maximum concentrations of 0 30 mg/kg in sample MW2-35 ' • The vertical extent of petroleum hydrocarbon impacted soil is defined in bonngs MW1, MW3 and MW4 Hydrocarbon contamination was not detected below 50 feet bsg in MW 1, MW3 and MW4 ' • The lateral!extent of soil contamination has not been defined • TPH-g, MTBE, BTEX compounds were detected in groundwater samples collected from Iwells MW 1 through MW4 at maximum concentrations of 82,000 gg/1 TPH-g, 11,000 gg/1 MTBE, 6,300 gg/1 benzene,,4,000 gg/1 toluene, 1,100 gg/l ethylbenzene and 5,200 gg/l xylenes • 1,2-DCA was detected in the ground water sample from well MW2 at a concentration of 4 6 gg/l • Petroleum hydrocarbon impact to ground water is not defined in any direction Advanced GeoEnvironmental,Inc