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{ <br /> Quarterly Monitoring Report <br /> Fourth Quarter - 2005 <br /> 1 0 Introduction <br /> 1 1 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 fourth quarter <br /> of groundwater sampling conducted at the Site on 20 December 2005 The period covered in <br /> this report is from October 2005 to December 2005 <br /> 9.2 Monitoring Activities Performed <br /> Groundwater monitoring and sampling at the Site during this quarter took place on 20 <br /> December 2005 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 /> ■ Removal of free product in MW-2 <br /> ■ Quarterly groundwater sampling of monitor wells MW-1,MW-2,MW-3,and MW4 <br /> ■ Laboratory analysis of ground water samples for <br /> o Volatile Organic Compounds [benzene, toluene, ethylbenzene and xylenes <br /> (BTEX)],Fuel Oxygenates [methyl-tert-butyl ether(MTBE),di-isopropyl ether <br /> (RIPE), ethyl-tertiary-butyl ether (EtBE), tertiary-amyi-methyl ether (TAME), <br /> tertiary-butanol (TBA), 1,2-dzbromoethane (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 /> o Total petroleum hydrocarbons as diesel and motor oils (TPH-diesel and TPH- <br /> 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 monitonng period as well as historical <br /> results are shown on Table 2 Laboratory Analytical Reports and the Cham-of-Custody Form <br /> provided in Appendix C , <br /> MO <br />