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Therefore, groundwater was monitored again in October, and samples were collected. The purpose of <br /> this report is to present the results of the August and October monitoring. <br /> 3.0 MONITORING PROCEDURES <br /> Monitoring took place on August 25 and October 12, 1995. On both days, the wells were opened and <br /> the depth to groundwater was measured, using a Solinst water level meter. The water depths are <br /> shown in Table 1 and Appendix A. <br /> Prior to collecting water samples on October 12, a two-stage submersible pump was used to purge the <br /> wells of starling water, which was deposited in 55-gallon drurns. During purging, the temperature, <br /> pH, and conductivity of the water were measured at 2-gallon intepials with a Corning Checkmate <br /> meter until these parameters stabilized (see Appendix A). To prevent cross-contamination, the-pu;ap <br /> was washed in a TSP-solution between wells. The water samples were collected with a disposable <br /> plastic bailer and placed in 40-m1 vials. The vials were labelled and logged, placed in a cooled ice chest, <br /> and shipped to McCampbell Analytical for analysis. The chain-of-custody form and laboratory report <br /> are included in Appendix B. <br /> 4.0 RESULTS <br /> • 4.� �e���a do Grog; <br /> The depth to groundwater was approximately the same in August as it had been in March. By October, <br /> the depth had increased from an average depth of 14 feet to 16.5 feet. The elevation of the water table <br /> is slightly more than 14.5 feet below mean sea level at the present time. <br /> 4.2 Groundwater Gradient <br /> The data in Table 1 were used to calculate the groundwater gradient and determine the flow direction, <br /> which are illustrated in Figure 3. The flow direction rotated several degrees to the southeast between <br /> December and March, but has now returned to a more eastward direction. The gradient has decreased <br /> to 0.0007 ft/ft. <br /> 4.3 Laboratory Results <br /> A strong gasoline odor was noticeable in all wells when they were purged. As shown in Table 2, <br /> concentrations of most analytes in KF-3 were essentially unchanged between December 1994 and <br /> March 1995, but have markedly decreased since then. In contrast, concentrations in the other two wells <br /> increased between December and March, in some cases more than 100 %, but have decreased again <br /> and are now between their December and March levels. The laboratory noted that the chromatograms <br /> 3 <br />