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1 <br /> 2.0 GROUNDWATER MONITORING, SAMPLING AND ANALYSIS <br />' On January ry27 2000, Ramage Environmental monitored and sampled groundwater <br /> at <br />' the site <br /> 2.1 Groundwater Monitoring <br /> 1 <br /> Depth-to-groundwater measurements were taken in all three groundwater monitoring <br />' wells to evaluate groundwater flow and gradient characteristics The depth to <br /> groundwater beneath the site ranged from 39 35 feet bgs in MW-2 to 40 38 feet bgs in <br /> MWA The corresponding groundwater surface elevation ranged from a high of 21 01 <br /> feet below mean sea level (msl) at MW-3 to a low of 21 53 feet below msl at MW-2 <br /> Groundwater levels have risen an average of 0 26 feet, since the wells were last <br /> monitored on October 14, 1999 Cumulative groundwater monitoring data are <br /> summarized in Table 1 <br />' The groundwater flow direction and gradient are shown on the groundwater surface map <br /> (Figure 3) In general, the resulting groundwater surface appears as a plane dipping to <br /> the south-southeast at a gradient of approximately 0 05 foottfoot This is consistent with <br /> groundwater surface measurements taken in previous quarters <br /> 2.2 Groundwater Sampling and Analysis <br />' Groundwater from all three wells was sampled to evaluate the concentration of gasoline <br /> hydrocarbons in groundwater beneath the site Each of the wells was purged of at least <br /> three well volumes using a decontaminated bailer Temperature, pH and electrical <br />' conductivity measurements were taken during purging Following purging, groundwater <br /> samples were collected from all three wells using dedicated and disposable sampling <br /> bailers The groundwater samples were contained in laboratory-supplied glassware, <br /> labeled and packed in an iced cooler for transport with chain-of-custody documentation <br /> to Kiff Analytical, LLC (Kiff), a state of California certified analytical laboratory (#2236) <br /> Kiff analyzed the groundwater samples for TPH-as-gasoline, BTEX, methyl-t-butyl ether <br /> (MTBE), diisopropyl ether (DIPS), ethyl-t-butyl ether(ETRE), tert-amyl methyl ether <br /> (TAME), and tent-butanol (TBA) by EPA Method 8260B The laboratory report and chain <br /> of custody are included in Appendix A <br /> 5 <br />