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1 - ' 20 March 2002 AGE-NC Project No 01-0877 ' Page 6 of 7 Fuel additives were not detected at or above laboratory reporting limits in the soil samples The ' approximate extent of Impacted soil is depicted in cross-sectional view in Figure 3 Analytical results of soil samples are summarized in Table 2 The laboratory report (CTEL Lab I D 0201-031-5 ' through 0201-031-12) and chain-of-custody are Included in Appendix B ' 4 3 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g and TPH-d were detected in the ground water samples collected from borings B 1 through B4 ' at concentrations as high as 5,400,000 micrograms per liter (µg/1) and 390,000 µg/l, respectively TPH-mo was detected in the ground water sample collected from boring B2 at a concentration of 12,000 µg/1 BTEX compounds were detected in the same samples at concentrations as high as ' 210,000 µg/1 benzene, 540,000 µg/1 toluene, 630,000 µg/1 ethylbenzene and 3,820,000 µg/1 total xylenes (B3) Oil and grease was detected in the samples collected from B1, B2 and B3 at concentrations as high as 1,500,000µg/1(133) BTEX compounds were detected in the ground water ' samples at concentrations as high as 8 5 µg/1 benzene, 150 µg/1 toluene, 120 µg/1 ethylbenzene and 1,300 µg/1 total xylenes Seven additional volatile organic compounds were detected in the ground water samples at concentrations ranging from 2,100 µg/1 to 2,000,000 µg/1 ' Fuel additives were not detected at or above laboratory reporting limits In the ground water samples Analytical results of groundwater samples are summarized m Table 3 The laboratory report(CTEL ' Lab I D 0201-031-1 through 0201-031-4)and cham-of-custody forms are included In Appendix B ' 5.0. ` SUMMARY AND CONCLUSIONS ' Based upon data collected on 04 January 2002, AGE concludes the following • Generally, light brown to bluish gray, damp to moist, silty clay, clayey silt to silt with sand ' were encountered from surface grade to approximately 10 feet bsg and at 20 and 25 feet bsg Bluish gray to very dark red, moist, silty sand was encountered at 15 feet bsg and at 30 feet bsg in boring B3 Moderate brown to very dark red, very moist, sandy silt to silt with sand ' was commonly encountered at 30 feet bsg Soil underlying the site, in the area of the former USTs is impacted by TPH-g, TPH-d, TPH-mo,TRPH and BTEX compounds from 2 5 feet bsg in the southern portion of the UST ' area and 10 feet bsg in the northern portion of the UST area to at least 30 feet bsg The lateral and vertical extent of petroleum hydrocarbon-impacted soil has not been defined ' - Ground water on-site is Impacted by TPH-g, TPH-d, TPH-mo, oil and grease and BTEX compounds in the area of the former USTs The lateral and vertical extent of petroleum hydrocarbon-impacted ground water has not been defined Advanced GeoEnvironmental,Inc