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b 1� and between each use. The pump was thoroughly cleaned prior to first use and between each use with a high pressure, potable 3. water spray rinse. With the development completed, the holding tank was sampled June 20, 1988 using a teflon bailer lowered into the tank from the top of the tank. Sampling and Analysis followed the roce- dures as discussed in the Groundwater Sampling section below. The sample was designated DEV-1. As the resultsof the holding tank sampling were all nondetectable the holding was discharged into the plant storm drainage system ndathewater tank was cleaned out on July 29 and August 1, 1988. On August 8, 1988, :.� the tank was removed from site. i Well S"rve in on July 8, 1988, the monitor wells were surveyed by two WESTON r personnel using a Nikon A2-1 level. The survey established elevations to the too of the locking riser at each well relative k to an arbitrary bench mark (ABM) located on the northwest corner of a concrete pad which supports high voltage transformers (see Figure 1 in report Section 3) . The ABM was set at 100.00 feet. � .' Top of casing elevations were obtained by measuring from the locking riser survey ,point at each well to the high point of the � .. PVC well casing; the relative elevations are as follows: MW-1 at 99.11 feet; MW-2 at 99.97 feet; and MW-3 at 98.34 feet. Groundwater Samplinct Groundwater samples were first collected on July 29, 1988. However, due to a laboratory accident, the samples were unusable. A second sampling was performed on August 19, 1988. All wells were first checked for the existence of a floating product layer by the use of an electronic oil-water probe (an MMC ,Model - D-2401-2UI) . The probe also served to give the depth to water and total well depth measurements. No product layer was regis- tered by the probe at any of the wells. The total petroleum hydrocarbons sample was then collected. The sample was obtained using a clean, transparent teflon bailer _lowered into each well using new, clean monofillament line until the bailer was partial- ly submerged. The bailer was retrieved and inspected for visual - confirmation of the oil-water probe results and its contents were poured into a clean, kilned 1 liter, unpreserved amber glass container and capped with teflon lined screw cap. It was neces- sary to lower the bailer more than once in order to obtain a liter of water. The development water in the holding tank was sampled in the same TT� C - 4