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i 23 December 1998 AGE-NC Project No 96-0235 ' Page 4 of 7 • Volatile aromatics (BTE&X)with MTBE in accordance with EPA Method 60218020, and ' • Oxygenated compounds(DIPS, ETBE, MTBE, TAME and TBA) In accordance with EPA Method 8260 Modified I 3.0. FINDINGS ' 31 STRATIGRAPHY ' Sand was encountered in boring MW-6 at depths of 30 and 35 feet bsg, in boring MW-7 at a depth of 30 feet bsg and in boring MW-8 at a depth of 15 feet bsg Silt and clay were encountered In the remaining soil samples collected The boring logs are included as Appendix A ' 32 ANALYTICAL RESULTS OF SOIL SAMPLES Organic vapor was not detected in soil samples collected from borings MW-6, MW-7 or MW-8 lieBenzene and xylenes were both detected at a concentration of 0 012 parts per million (ppm, reported as milligrams per kilogram) in the sample collected from a depth of 45 feet in boring MW-8 Other petroleum hydrocarbons and oxygenates were not detected in the soil samples collected at the site ' Analytical results of soil samples are summarized on Table I The laboratory report (MAI Sample Nos 94282-94288) and chain-of-custody form are included in Appendix B ' 3 3 GROUND WATER GRADIENT AND FLOW DIRECTION ' The elevation of ground water In each well was calculated by subtracting the depth to ground water from the surveyed casing elevations Depths-to-ground water ranged from 16 14 feet to 19 84 feet below the tops of the well casings Ground water elevations at the site ranged from -9 72 feet in ' MW-3 and MW-6A to -12 87 feet mean sea level (MSL) In MW-6B, an average rise of elevation of 0 88 feet ' Ground water elevation was lower in MW-I and MW-2; with screen intervals from 40 to 60 feet bsg and in wells MW-6B and MW-BB, with screened Intervals from 40 to 45 feet bsg Ground water ' elevations were higher In the remaining wells, which have shallower screened intervals The inferred ground water flow direction was examined with the data divided into two sets, based ' upon the well screen intervals Figure 3 Illustrates the ground water elevation based upon wells MW- 1, MW-2, MW-613 and MW-8B, which have the deeper screened intervals A gradient of 0 02 ft/ft directed N 30° W was calculated using data from these wells Ground water elevations, based upon ' Advanced GeoEmlronmental,Inc Y