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Walk TABLE 1 ` WATER LEVEL INFORMATION SUMMARY Well Top of Casing Depth to Groundwater Depth to Groundwater ss Number Elevation Groundwater Elevation Groundwater Elevation 3122191 3122191 3/25/31 3/25/91 MW-1 0.07 13.10 -13.03 12.57 -12.54 MW-2 0.67 13.87 -13.20 13.36 -12.69 MW-3 0.59 13.55 -12.96 13.01 -12.42 Casing elevations an in fest above Mean Sea level and were surveyed relative to beedtn a k coated appronimneV 3000 feet to the west at the intmection of Sey�Wnin Holl Drive and Cumberland Place. All depths to groundwater ars measured[nm tap of swung. casing volumes. A summary of this activity is given in the Groundwater Sampling Field till Notes given in Appendix D. a +. Groundwater samples were collected with a Teflon bailer equipped with a ball-check valve, and sample containers were fi!!t`d directly from the bailer as scan after purging as possible. The samples were placed immediately on ice in a Cooler and later transported to the laboratory under standard chain-of-custody procedures. Chain-of-custody forms used in this process are contained in Appendix C. Samples were analyzed for TPH by EPA Method 418.1 and BTEK by EPA Method 602. All bailers used for purging and/or sampling were decontaminated before and after sampling each well. The equipment was rinsed with deionixed water, cleaned with an Alconox (brand-name) solution, and then rinsed three times with deionized water. The nylon-hoisting line on the bailer was similarly rinsed prior to sampling the next well. Also, sounders used for measuring water levels were similarly decontaminated. Sampling personnel wore outer gloves while purging, and disposable inner gloves while filling sample containers to prevent cross-contamination. FREE-PRODUCT MONITORING Thickness of possible free product was monitored by .j,sing an electronic interface probe with a + or - 0.01 foot detection limit. This was perFW.rned at the completion of 67" ..,L 3-4 175-07M 4124/91