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3.0 Summary of Findings 3.1 Site H dro eolo Y 9 9Y The well casing elevations were previously surveyed relative to an arbitrary bench mark at the site that was set to 100 00 feet The water table elevation on November 1, 1995 was measured between 34 46 feet and 35 83 feet (corresponding to depths between 63 82 feet and ' 62 51 feet) A summary of the groundwater elevation data is provided in Table 1 A potentiometric surface map for the site (Figure 2) indicates that the groundwater flows to the ' northwest with a gradient between 0 001 ft/ft and 0 025 ft/ft The variation in the groundwater gradient is likely to be a result of the groundwater elevation measured in MW-3 ' Groundwater at MW-3 was measured approximately 1 33 feet above the average groundwater level in the other three wells 3.2 Groundwater Quality Data Groundwater samples were collected from four monitoring wells - MW-3, MW-4, MW-5 and MW-6 TPH as diesel was detected in the groundwater sample collected at MW-3 (190 Ng/L), MW-4 (85 pg/L) and MW-5 (120 pg/L) None of the groundwater samples yielded concentrations of TPH as gasoline or BTEX above the method detected limits Toluene (0 55 pg/L) was detected in the quality control sample collected The method detection limit for toluene is 0 5 pg/L Although the source of the toluene detection is unknown, the measured concentration is only 0 05 pg/L above the method detection limit. Since toluene was not ' detected in any of the monitoring well samples, the quality of the analytical results is acceptable The Iaboratory quality control data was determined to be acceptable The laboratory report, which includes the results for all the samples that were analyzed, is presented in Appendix C Table 2 provides a summary of the groundwater analytical results MZJ04-30-96/V DB F/95-0045 if 3-1