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i <br /> Contamination detected'in MW-1 maybe moving differentlythan that-detected in MW-2 and MW-3 <br /> • due to different sand bodies contributing to the wells. <br /> 1 , . ..`, . .. i, is , .x „f ,. •. '' E c ,. <br /> v Silty sand was encountered at 10°feet bsg in MWS.and MW6 and at 20 feet bsg in 1VIW6 and B7. . ' <br /> Silty clay was encountered at 5 feet and.15 feet through 34 feet bsg in MWS and at 5, feet,.15 feet; <br /> 25 feet; and 30:feet inMW6. Silty clay was also-encountered at 5 feet through 15 feet, 25;feet, and- <br />! 30 feet in boringB7. The sand at 10 feetbsg a ears to have anorth-northeast to south-southwest <br /> g pP <br /> orientation-the sand at 20,feet bsg appears to'have aeast-northeast tawest-southwest orientation and <br />' ^ limited lateral extent.: <br /> D'ainp;f saturated, gray to brown, silty sand was encountered at 10 feet and 20 feet bsg in borings <br />' MW7'acid MW8. Dry to,saturated, brown,.-silty clay,and clay were encountered at allother depths in borin s MW7 throw h MW10. <br />' Saturated.soil was'encountered_in each,boring at depths of approximately 10 feet bsg. <br /> GROUND'WATER GRADIENT AND FLOW DIRECTION- WELL NETWORK <br /> Depths,to,ground water averaged 12 feet below the well casing tops. The depth to ground-water has <br /> • ,ranged frdrh 9,78 to 14.01 feet`. below the well casing tops. Ground water elevations at the site <br /> ranged'from 26'.45..to 30.68 feet above mean sea level.(MSL) in'well MW_I, over the monitoring <br /> period. Ground water levels have"steadily'decreased over the past four to five years..The water . <br /> elevations were within-the screened intervals of all the monitoring wells on-site. The ground water . <br /> flow direction was inferred using ground water elevation data.`The ground water at the site has <br /> inferred to be flowing to the north:under an average gradient of 0.005 feet/feet across the:-area <br /> -monitored. <br /> Advaieeed GeoEnviron ncntal,Inc. <br />