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1 <br /> After removal from the sampler, the ends of the lead tube were covered with aluminum <br />' sheets, capped, and sealed with tape. The samples were labelled and transported under <br /> chain-of-custody to Sparger Technology in Sacramento for analysis Sample descriptions <br /> were recorded on the boring logs (Appendix A). <br /> 3.4 Laboratory Analysis <br />' Water samples were analyzed for total petroleum hydrocarbons (TPH as gasoline, diesel, <br /> and motor oil) and purgeable aromatics (BTE&X) in accordance with EPA methods <br /> 8015m and 602. Seven soil samples were analyzed for TPH as gasoline and diesel and <br /> BTE&X in accordance with methods 8015m and 8020. The laboratory reports and chains <br /> of custody are presented in Appendix B <br /> 1 <br /> 4.0 FINDINGS <br />' 4.1 Groundwater Elevation <br />' Table 4 shows the relative groundwater elevations for the monitoring wells Comparison <br /> of the September 1993 and January 1994 measurements indicates that water levels have <br /> dropped approximately 1-1/2 feet in all wells This fall is a continuation of the decline <br />' that began during the summer months The depth to groundwater has varied between 10 <br /> and 15 feet since the excavation was dug in 1991 <br /> As in the previous sampling events, the water level is highest in MW-3 and lowest in <br /> MW-1, and groundwater flow continues to be to the southeast, although somewhat more <br /> eastward than before The current hydraulic gradient is 0 0117 ft/ft oriented S 65°E <br />' (Figure 4) <br /> TABLE 4 <br /> Groundwater Data* <br /> Depth to Groundwater Relative Groundwater <br />' Well No Relative Elevation <br /> Casing 9/93 1/94 9/93 1/94 <br /> Elevation <br /> MW-1 10031 961 1136 9070 8895 <br /> MW-2 9977 895 1144 9082 8833 <br /> MW-3 10013 867 1111 9146 8902 <br /> * All measurements in feet <br /> 10 <br />