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L <br /> Contamination detected in MW-1 may be moving differently than that detected in MW-2 and MW-3 <br /> Ldue to different sand bodies contributing to the wells. <br /> Silty sand was encountered at 10 feet bsg in MW 5 and MW6 and at 20 feet bsg in MW6 and B7. <br /> L Silty clay was encountered at 5 feet and 15 feet through 30 feet bsg in MW5 and at 5 feet, 15 feet, <br /> 25 feet,and 30 feet in MW6. Silty clay was also encountered at 5 feet through 15 feet,25 feet,and <br /> 30 feet in boring B7.The sand at 10 feet bsg appears to have a north-northeast to south-southwest <br /> L orientation;the sand at 20 feet bsg appears to have a east-northeast to west-southwest orientation and <br /> limited lateral extent. <br /> Damp to saturated, gray to brown, silty sand was encountered at 10 feet and 20 feet bsg in borings <br /> MW7 and MW8. Dry to saturated, brown, silty clay and clay were encountered at all other depths <br /> in borings MW7 through 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 from 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-1,over the monitoring <br /> L 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 /> L inferred to be flowing to the north under an average gradient of 0.005 feettfeet across the area <br /> monitored. <br /> L <br /> L <br /> L <br /> L <br /> L <br /> L <br /> Adtiwneed GeoEnArenmenul,Ine. <br /> L <br />