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2 1 The groundwater sampling and analysis procedures are discussed in Section 2 2 The <br /> depth to groundwater results are discussed in Section 2 3, and the groundwater analytical <br /> results are discussed in Section 2 4 Depth to groundwater and groundwater sampling <br /> methodology are described in Appendix A <br /> 2.1 DEPTH TO GROUNDWATER PROCEDURES <br />' On January 16 and July 11, 1997, depth to groundwater was measured, in feet below <br /> ground surface (bgs), in each of the five monitoring wells at the Site using an electronic water <br /> level Indicator per the methodology specified in Appendix A 1 1 <br /> 2.2 GROUNDWATER SAMPLING AND ANALYSIS PROCEDURES <br />' Groundwater samples were collected from site monitoring wells on July 11, 1997, per <br /> the methodology specified In Appendix A 1 Field parameters were recorded on Field Record <br /> of Water Sampling Forms, copies of which are presented in Appendix B A duplicate sample <br /> was collected from monitoring well DMW-1 and was identified as "DMW-10 " After <br /> collection, the samples were hand delivered under chain-of-custody to Quanterra <br /> Environmental Laboratories (Quanterra) In West Sacramento, California for analysis Quanterra <br /> Is a State of California Department of Toxic Substances Control (DTSC) certified laboratory <br /> The chain-of-custody (Appendix B) requested that the water samples be analyzed for total <br /> petroleum hydrocarbons as diesel (TPH-d) by EPA Method 8015 modified <br />' 2.3 DEPTH TO GROUNDWATER RESULTS <br />' Current and past depth to groundwater data are provided below in Table 1 In July <br /> 1997, the depth to groundwater In the five site monitoring wells ranged from 46 23 to 46 91 <br /> feet bgs, with an average depth of 46 62 feet bgs Based on these data, groundwater levels <br />' have risen an average of six feet between the September 6, 1996, and July 11, 1997 <br /> measurements This increase in groundwater elevation is likely due to the average or greater <br />' rainfall during 1995 and 1996 when compared to pre-1995 drought conditions, and not <br /> necessarily Indicative of a trend in rising elevation It is anticipated that groundwater elevations <br /> will continue to fluctuate seasonally within the range demonstrated In Table 1 <br /> I <br /> 2 R\5AC1044MIS09708 05 WPD <br /> DAMES& MOORE <br />