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03 January 2000 <br /> AGE-NC Project No 99-0612 <br />' Page 2of3 <br /> and the PHS-EHD <br />' GROUND WATER ELEVATION MONITORING <br /> On 12 December 2000, a Solinst water level meter was used to measure the depth to ground water <br />' in ground water monitoring wells MW-1, MW-2, MW-3, MW-3A, MW-3D, MW-4 through <br /> MW-13, MW-13A and MW-13B relative to the tops of the well casings Ground water elevation in <br /> each well was determined from these data(Table 1) Ground water elevation contours are illustrated <br />' on Figure 1 <br /> WELL PURGING <br /> After recording water level measurements, each monitoring well was purged of standing water by <br />' utilizing a down-hole pump The down-hole pump was decontaminated prior to insertion In each <br /> well as described below Approximately 5 to 85 gallons of water were removed from each of the <br />�. wells (a minimum of 3 casing-water volumes per well) Ground water temperature, pH and <br /> conductivity were measured at regular purge-volume intervals using ICM and Hydac water analyzers <br /> Field sheets and data are included in Appendix A Purged water was stored on-site in labeled, 55- <br /> gallon DOT-approved drums <br /> SAMPLE COLLECTION AND ANALYSIS <br /> Water samples were collected from each purged well using new disposable plastic bailers These pre- <br />' cleaned bailers are disposed of after one use, thereby minimizing cross contamination due to <br /> sampling devices The samples were drawn and collected in such a manner that agitation and <br /> exposure of the groundwater to the atmosphere was minimal Sample containers were filled using <br /> the appropriate disposable sampling attachment which allows controlled flow out of the bottom of <br /> the bailer <br />' Each water sample was transferred into 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid <br /> as a sample preservative After collection, the samples were properly labeled, placed in a chilled <br /> container and transported under chain-of-custody to McCampbell Analytical, Inc (MAI), a State of <br />' California Department of Health Services (DHS)-certified analytical laboratory The samples were <br /> shipped via Cal-Overnight, and overnight delivery service Laboratory notes on the chain-of-custody <br />' form indicate that the samples were received iced, in good condition and with no head space MAI <br /> analyzed the samples for <br /> i <br /> Advanced GeoEnnronmental,Inc <br /> 1 <br />