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I <br /> CgobgicalT¢clutus!". Page 4 <br /> I " Groundwater Monitoring Report <br /> Project No. 750.2 <br /> May 14,2002 <br /> Purging continued until the temperature, conductivity and pH of the groundwater stabilized <br /> + (<10% variation among three readings) indicating that formation water representative of <br /> aquifer conditions was entering the well. These waterualit <br /> q y parameters were measured at � <br /> intervals of each well volume purged. <br /> LF Once purging was complete, a water sample was collected from the Waterra tube. Care was <br /> y <br /> taken to minimize sample agitation from the initial filling of the bailer to the transfer of the <br /> sample to the VOA vials. Once the sample containers were filled and capped, thebottles <br /> were inverted, tapped and checked for headspace bubbles. Each sample container was <br /> identified and labeled with a unique designation, inserted into foam holders and placed in an <br /> ice chest cooled to VC for transport to the laboratory. All non-disposable sampling <br /> equipment was decontaminated using a steam cleaner before and between uses. Disposable <br /> gloves were used by the technician to collect all samples and were changed with each <br /> # sampling event. <br /> A chain of custody document, listing all samples collected, accompanied the samples from <br /> field to laboratory, thereby providing a means to track their movement and ensure their <br /> integrity. <br /> The purge water was placed in a properly labeled 55 gallon DOT approved container and <br /> stored on site until itsro er disposition can be arranged. <br /> p p P <br /> �F Groundwater monitoring field logs are included in Appendix C. <br /> 1.3 Laboratory Analyses <br /> 1 The groundwater samples collected on March 2, 2002, were delivered to Sherwood Labs <br /> � Corporation of Hilmar, California (Department of Health Services Certification No. 1400), <br /> L` <br /> � for analysis. <br /> 1 � The groundwater samples were analyzed for: <br /> • Benzene, Toluene, Ethyl Benzene, and Xylene (BTEX) by EPA method 8020/8015 <br /> , <br /> { • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 5030/8015(M) <br /> Additional samples were sent to Entech Analytical Labs, Inc. from Sherwood Labs for the <br /> analysis of <br /> • Fuel oxygenated compounds MTBE DIPS ETBE TA <br /> E, yg ounds p ( ME & TBA) by EPA method <br /> 8260 <br /> i The detection limits for the above analyses are listed in Table 2 of Appendix A and the lab <br /> data are presented in Appendix B. <br /> l , <br />