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' 07 April 1999 . AGE-NC Project No 98-0540 Page 6 of 9 I41 SOIL PROFILE A Light brown to brown, moist silty sand, was encountered from surface grade to depths of approximately 30 feet in each boring A mixture of moist light brown to dark brown silty sand and sandy silt, with some possible oxidation, was generally encountered from 30 feet to 45 feet bsg A brown moist , sandy clay, silty clay, medium plasticity,was encountered from 45 feet to 65 feet bsg Lenses approximately six inches thick of well graded sands, gravelly sands, were encountered from 45 feet to 65 feet bsg A brown, silty sand, sand-silt mixture, low plasticity, moist, was generally encountered at depths between 65 feet and 75 feet bsg Saturated soil was encountered in each boring at depths between 75 feet and 80 feet bsg Boring logs Iare included in Appendix A 4 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER Neither petroleum hydrocarbon odor nor discoloration were observed in soil or ground water samples collected from B3 Organic vapor was detected in soil sample duplicates collected from B 1(MW-1)and B5(MW-3)at concentrations of 4 to 136 parts per million(ppm) Organic vapor was not detected in other soil samples 43 GROUND WATER ELEVATION AND GRADIENT On 11 March 1999 the depths to round water in monitoring well W- - - p g g s M 1, MW 2, and MW 3 were measured at 75 02, 75 11, and 75 14 feet below the tops of well casings respectively The ground water elevation data for MW-1, MW-2, and MW-3 collected during March's ground water monitoring event is depicted in Appendix B In March 1999, the gradient was calculated to be 0 004 ft/ft, or approximately 15 feet per mile for the area located between wells MW-I, MW-2, and MW-3 The ground water monitoring data I indicates suggests that the ground water flow direction was generally northeast Due to the low gradient at the site, slight variations in ground water measurements or changes of recharge/discharge of the local ground water could greatly modify the gradient calculations y 44 RESULTS OF SOIL SAMPLE ANALYSIS The • soil probe boring samples from P1 and P2 were submitted for analysis of TPH-g, BTEX, Fuel Advanced LieoEmtronmental,Inc