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} Ga&g1cj1TccWcs1xc. Page 4 Groundwater Monitoring Report Project No. 750.2 i 'April 10,2003 +Lv cleaner before and between uses. Disposable gloves were used by the technician to collect all samples and were changed with each sampling event. A.chain of custody document, listing all samples collected, accompanied the samples from i field to laboratory, thereby providing a means to track their movement and ensure their L` integrity. The purge water was placed in a properly labeled 55 gallon DOT approved container and stored on site until its proper disposition can be arranged. Groundwater monitoring field logs are included in Appendix C. 1.3 Laboratory Analyses Theroundwater samples collected on December 30 2002 were delivered to Sherwood -• g p o Labs of Hilmar, California (Department of Health Services Certification No. 1400), for al C analysis. { The groundwater samples were analyzed for: • Benzene,Toluene,Ethyl Benzene, and Xylene (BTEX)by EPA method 8020/8015 • Total Petroleum Hydrocarbons as Gasoline (TPH-G)by EPA method 5030/8015(M) i Additional samples were sent to Entech Analytical Labs, Inc. from Sherwood Labs for the analysis of- • Fuel oxygenated compounds (MTBE, DIPS, ETBE, TAME & TBA) by EPA method �1 8260 The detection limits for the above analyses are listed in Table 2 of Appendix A and the lab data are presented in Appendix B. As required under A132886, the laboratory data was submitted electronically to GeoTracker on Aprill0, 2003, with confirmation number 7463127553. 4 L4 i 2.0 FINDINGS & RECOMMENDATIONS Findings The results of the groundwater sample analyses show the following: • Well MW-1 has only shown trace levels of Xylene for the last two monitoring events. • Figure 4 illustrates groundwater elevation and TPH-G concentrations in MW-1 versus �.-. g time.