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Quarterly Monitoring Report <br /> I <br /> Third Quarter - 2004 <br /> 1 .0 Introduction <br /> ' <br /> 7.9 Scope of Work <br /> Environeering 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 (the Site) <br /> The location of the Site is shown on Figures 1 and 2 This report documents the third quarter of <br /> ' groundwater sampling conducted at the Site on September 22,2004 The period covered in this <br /> report is from July 2004 to September 2004 <br /> E <br /> 1.2 Monitoring Activities Performed <br /> Groundwater monitoring and sampling at the Site during this quarter took place on September <br /> 22,2004 This quarter's sampling included the following <br /> ' ■ Groundwater elevation measurements in all wells <br /> ■ Testing for natural attenuation indicators of groundwater samples, including pH, <br /> ' • conductivity,and temperature <br /> a Removal of free product in MW-2 <br /> ■ Quarterly groundwater sampling of monitor wells MW-1,MW-2,MW-3,and MW-4 <br /> ■ Laboratory analysis of ground water samples for <br /> o Volatile Organic Compounds [benzene, toluene, ethylbenzene and xylenes <br /> (BTEX)],Fuel Oxygenates[methyl-tort-butyl ether(MTBE),di-isopropyl ether <br /> ! (DIPE), ethyl-tertiary-butyl ether (EtBE), tertiary-amyl-methyl ether (TAME), <br /> tertiary-butanol (TBA), 1,2-dibromoothane (EDB), 1,2-dichloroethane <br /> (DCA12)], and TPH-gasoline by EPA Method 8260B Volatile Organic <br /> ' Compounds by Gas Chromatography/Mass Spectrometry(GC/MS) <br /> r <br /> 3 <br /> o Total petroleum hydrocarbons as diesel and motor oils (TPH-diesel and TPH- <br /> I oil)by Method LUFT GC/MS <br /> The locations of all monitor wells as well as historical boreholes are shown on Figure 3 <br /> Appendix A provides a historical summary of field activities at the site and Appendix B <br /> contains this quarter's 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 Chain-of-Custody Form <br /> E are provided in Appendix Q( <br /> y�i <br /> —0J <br />