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F 404 WEST FREMONT STREET WKA No. 1628.02 September 2, 1994 FPage 6 F Soil Conditions i Soil types encountered beneath the site were brown and gray clays and silts to a depth of approximately 19 feet. The clays and silts were underlain from a depth of 20 to 40 feet by a brown silty and poorly graded sand. Analytical results revealed no detectable TPH-g or BTEX in the soil samples collected during $ drilling of MW5 and MW6. A summary of test results for the soil samples collected from monitoring wells MWS and MW6 is included as Table 1. Complete laboratory reports and F1chain-of-custody documents for the soil samples are included in.Appendix B. ' Ground Water Conditions Ground water was encountered during drilling at a depth of approximately 26 feet below grade. The most recent ground water measurements (February 24, 1993) indicate the ground water remains at 26 feet below grade. Based on these latest water level measurements, the ground water flow direction beneath the site appears to be flowing generally to the northwest with a Fhydraulic gradient of 0.005 ft/ft as shown on Plate 6. Fi Monitoring wells MWS and MW6 were developed and purged as described in Appendix A. Ground water samples were subsequently collected from wells MW2, MW3, MW4, MW5 and MW6 on May 5, 1994. A sample from well MW1 was not obtained due to a 1/8- to 1/4-inch thickness of product observed floating on the water. Detectable TPH-g concentrations were found in the water samples collected from wells MW3, MW4 and MW6. Elevated BTEX P. concentrations were detected in well MW4; trace BTEX concentrations were detected in water samples from wells MW5 and MW6. A summary of analytical results for the water samples Fcollected to date is included as Table 2. Plate 2 includes a summary of petroleum hydrocarbon concentrations in ground water. Laboratory reports and chain-of-custody documents are included in Appendix B. Fi` - R' WALLACE.KUHL Recycled paper &ASSOCIATES INC. 4