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1 <br /> 3.3 Monitoring Well Sampling <br /> On March 25, 1994, the water levels in each well were measured relative to the top of the <br /> casing using a Solinst water level meter (Table 1) No free hydrocarbon product has ever <br /> been observed in any well. <br /> TABLE 1 <br />' RELATIVE GROUNDWATER ELEVATIONS <br /> Depth to Groundwater Relative Groundwater <br />' Relative Elevation <br /> Well No Casing 9/93 3/94 9/93 3/94 <br /> Elevation <br /> MW-1 4971 1208 1072 3763 3899 <br />' MW-2 4840 1070 932 3770 3908 <br /> W-3 4874 1086 948 3788 3926 <br />' MW-4 4694 956 815 3738 3879 <br /> `All measurements m feet <br /> After water levels were measured, a purge pump was used to purge standing water from <br /> each well Approximately 7 to 8 gallons of water were removed from each well to stabilize <br /> temperature, pH and conductivity (Appendix A) Groundwater parameters were measured <br />' at one-gallon intervals using an ICM water analyzer The purge water was stored in 55- <br /> gallon drums on-site Water samples were collected from each well in 40-m1 EPA vials and <br /> 1-liter amber bottles using a new disposable plastic bailer <br />' 3.4 Laboratory Analyses or Water and Soil Samples <br /> The water and soil samples were placed in a chilled container and transported under chain- <br /> of-custody to Western Environmental Science & Technology (WEST) in Davis, California <br /> The water samples were analyzed for TPH as gasoline and diesel and BTE&X in accordance <br /> with EPA methods 8015m and 602 Soil samples were composited, and analyzed for TPH <br /> as gasoline and diesel and BTE&X in accordance with EPA methods 8015m and 8020 <br /> 4.0 Findings <br /> t4.1 Groundwater Elevation and Gradient <br /> The elevation of groundwater in each well was calculated by subtracting the groundwater <br /> depth from the surveyed casing elevation (Table 1) The depth to groundwater ranges from <br /> G_6$_1%&,s.—M Im <br /> srea.m same ap_Ws4Mi s 6 <br />