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z <br /> I� y <br /> • Quarterly Report - Fourth Quarter 2004 <br /> MEL BOKIDES PETROLEUM, INC. <br />' 444 Mossdale Road, Lathrop, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Nick Bokides of Mel Bokides Petroleum,Inc ,Advanced GeoEnvzronmental, <br />' Inc (AGE)has prepared the enclosed report for the former Mel Bokides Petroleum facility located <br /> at 444 Mossdale Road,Lathrop,California(site) The scope of work included gauging and sampling <br /> of the ground water monitoring well network on the site and preparation of this report The site <br />' setting is illustrated on Figure 1 Site structures,previous borings, and monitoring well locations are <br /> depicted on Figure 2 <br />' Field work was performed in accordance with Central Valley Regional Water Quality Control Board <br /> (CVRWQCB)and San Joaquin County Environmental Health Department(EHD)guidelines for the <br />' subsurface investigation of underground storage tank(UST) sites and ground water monitoring well <br /> sampling procedures, respectively The site history, a description of work previously performed at <br /> the site with analytical data from the previous investigations and a site conceptual model, are <br />' summarized in Appendix A <br />' . 2.0 PROCEDURES <br /> On 26 October 2004, ground water monitoring and sampling were performed at the site on wells <br />' MW-1 through MW-5 <br />' 21 PURGE WATER DISPOSAL <br /> On 22 October 2004, approximately 275 gallons of non-hazardous purge water were pumped from <br />' on-site 55-gallon drums The purge water had been generated by previous groundwater monitoring <br /> events Pumping and disposal was completed by American Valley Waste Oil, Inc of Delhi, <br />' California The purge water was transported to Cascade General, Inc in Portland, Oregon for <br /> disposal A copy of the waste disposal manifest is included in Appendix B ` <br /> 2 2 WELL MONITORING AND EVACUATION <br />' A Solinst water level meter was used to measure the depth to ground water in monitoring wells <br /> MW-1 through MW-5 After depth to ground water measurements were obtained, approximately <br /> 3 75 to 4 5 gallons of water were removed from each well (a minimum of 3 casing-water volumes) <br />' using dedicated,disposable bailers Temperature,pH,and conductivity of purged ground water were <br /> measured at regular intervals using an Oakton water analyzer Field data sheets are included in <br /> Appendix C - � <br /> Advanced GeoEnvironmentaf,Inc <br />