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,a gW10gkothckoddInc. Page <br /> Groundwater Monitoring Report <br /> Project No. 750.2 <br /> j November 18,2003 <br /> Lt pump into 40-m1 VOA vials preserved with hydrochloric acid or trisodium phosphate. Each <br /> sample container was checked for headspace bubbles, identified and labeled with a unique <br /> designation, inserted into foam holders and placed in a chilled ice chest for transport to the <br /> laboratory. All non-disposable sampling equipment was decontaminated using a steam <br /> i' cleaner before and between uses. Disposable gloves were used by the technician to collect <br /> all samples and were changed with each sampling event. <br /> j <br /> _ A chain of custody document, listing all samples collected and their intended analyses, <br /> accompanied the samples from field to the laboratory, thereby providing a means to track <br /> the movement of and ensure the integrity of the samples. <br /> Groundwater monitoring field logs are included in Appendix C. <br /> 1.3 Laboratory Analyses <br /> The groundwater samples collected on September .6, 2003, were delivered to Sherwood <br />+ Labs of Hilmar, California (Department of Health Services Certification No. 1400), for <br /> analysis. <br /> The groundwater samples were analyzed for: <br /> • Benzene, Toluene, Ethyl Benzene, and Xylene(BTEX)by EPA method 8020/8015 <br /> • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 8020/8015(M) <br /> • Fuel oxygenated compounds (MTBE, DIPE, ETBE, TAME & TBA) by EPA method <br /> 8260 <br /> k The detection limits for the above analyses are listed in Table 2 of Appendix A and the lab <br /> Y pp <br /> data are presented in Appendix B. <br /> L.: As required under AB2886, the laboratory data was submitted electronically to GeoTracker <br /> r on September 26, 2003: The confinnation number is 8560797452. <br /> I <br /> 2.0 FINDINGS & RECOMMENDATIONS <br /> Findings <br /> The results of the groundwater sample analyses show the following: <br /> • All six monitoring wells were non-detect for all analyzed compounds. <br /> • MW-1 was completely non-detect for the third consecutive monitoring event. Figure 5 <br /> illustrates groundwater elevation and TPH-G concentrations in MW-1 versus time. <br /> I , <br />