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i <br /> t <br /> 1 <br /> Quarterly Monitoring Report <br /> I , <br /> Second Quarter - 2004 <br /> � I <br /> ' 1 .0 Introduction <br /> I <br /> 1.1 Scope of Work <br /> Envnbneenng Inc (EI) has been retained by California Tank Lines, Inc (CTL) to provide <br /> professional environmental services at 3105 South El Dorado Street, Stockton, CA thite) <br /> The location of the Site is shown on Figures 1 and 2 This report documents the n er of VA <br /> ' groundwater sampling conducted at the Site on June 16, 2004 The period covered in this Z�"p <br /> report is from April 2004 to June 2004 <br /> 1.2 Monitoring Activities Performed <br /> Groundwater monitoring and sampling at the Site during this quarter took place on June 16, <br /> 1 2004 This quarter's sampling included the following <br /> • Groundwater elevation measurements in all wells <br /> i • Testing for natural attenuation indicators of groundwater samples, including pH, ' <br /> conductivity,and temperature <br /> ■ Removal of free product in MW-2 �t <br /> 1 <br /> • Quarterly groundwater sampling of monitor wells MW-1,MW-2,MW-3,and MW4 E <br /> ' ■ Laboratory analysis of ground water samples for <br /> i <br /> o Volatile Organic Compounds [benzene, toluene, ethylbenzene and xylenes <br /> (BTEX)],Fuel Oxygenates [methyl-tert-butyl ether(MTBE),di-isopropyl ether i <br /> (DIPE), ethyl-tertiary-butyl ether (EtBE), tertiary-amyl-methyl ether (TAME), <br /> ternary-butanol (TBA), 1,2-dibromoethane (EDB), 1,2-dichloroethane <br /> (DCA12)], and TPH-gasolme by EPA Method 8260B Volatile Organic <br /> Compounds by Gas Chromatography/Mass Spectrometry(GC/MS) <br /> 1 o Total petroleum hydrocarbons as diesel and motor oils (TPH-diesel and TPH- <br /> oil)by Method LUFT GUMS <br /> i <br /> The locations of all monitor wells as well as historical boreholes are shown on Figure 3 <br /> I Appendix A provides a historical summary of field activities at the site and Appendix B <br /> contains this quarters original Well Purging and Sampling Documentation The laboratory <br /> results of the groundwater analyses for the current monitoring period as well as historical <br /> results are shown on Table 2 Laboratory Analytical Reports and the Cham-of-Custody Form <br /> are provided in Appendix <br /> 1 <br />