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Geological recwcs Inc. <br /> Page 4 <br /> Groundwater Monitoring Report <br /> Project No.750.2 <br /> May 15,2003 <br /> CA return trip was made to the site on March 7, 2003 to purge and sample MW-101. Purging <br /> and'sampling followed the above protocol. <br /> t A chain of custody document, listing all samples collected, samples accompanied the les from <br /> p p <br /> field to- laboratory, thereby providing a means to track their movement and ensure their <br /> r integrity. <br /> L <br /> The purge water was placed in a properly labeled 55 gallon DOT approved container and <br />�f stored on site until its proper disposition can be arranged. <br /> Groundwater monitoring field logs are included in Appendix C. <br /> I <br /> 1.3 Laboratory Analyses <br /> The;groundwater samples collected on March 6, 2003, were delivered to Sherwood Labs of <br /> Hiltnar, California(Department of Health Services Certification No. 1400), for analysis. <br /> The'groundwater samples were analyzed for: <br /> r <br /> • Benzene, Toluene,Ethyl Benzene, and Xylene (BTEX) by EPA method 8020/8015 <br /> 0 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, DIPE, ETBE, TAME & TBA) by EPA method <br /> 8260 <br /> The detection limits for the above analyses are listed in Table 2 of Appendix A and t <br /> y pp he lab <br /> data are presented in Appendix B. <br /> As required under AB2886, the laboratory data was submitted electronically to GeoTracker <br /> on May 2, 2003, with confirmation numbers 4725751936 & 5446490466. <br /> 2.0' FINDINGS & RECOMMENDATIONS <br /> rL <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 first event. Figure 4 illustrates groundwater <br /> relevation and TPH-G concentrations in MW-1 versus time. <br /> 1 <br /> j <br />