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' Quarterly Report -First Quarter 2003 <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 GeoEnvironmental, <br /> Inc (AGE) has prepared the enclosed report for the former Mel Bokides Petroleum facility located <br /> at 444 Mossdale Road, Lathrop, California (the site) The scope of work included gauging and <br />' sampling of the groundwater monitoring well network on the site and preparation of this report The <br /> site setting is illustrated on Figure 1 Site structures,previous bonngs and monitoring well locations <br /> are depicted on Figure 2 <br /> The field work was performed in accordance with Central Valley Regional Water Quality Control <br /> Board(CV-RWQCB)and San Joaquin County Environmental Health Department(EHD)guidelines <br /> for subsurface investigations of underground storage tank(UST)sites and ground water monitoring <br /> well s ampling p rocedures, r espectively T he s rte h istory a nd a d escription o f w ork p reviously <br /> performed at the site were presented in the AGE-prepared Preliminary Investigation and Evaluation <br />' Report(PIER), dated 01 March 2000 <br /> 2.0. PROCEDURES <br /> I On 28 January 2003,groundwater gauging and sampling were performed at the site on wells MW-1 <br /> through MW-5 <br /> 2 1 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, a minimum of <br /> 3 casing-water volumes were purged from each well to be sampled using dedicated, disposable <br /> bailers Seven to eight gallons of water were removed from each well Temperature, pH and <br /> conductivity of purged ground water were measured at 1-gallon intervals using an ICM water <br /> analyzer The field data sheets are included in Appendix A <br /> Purged water was temporarily stored on-sits in 55-gallon DOT-approved drums pending proper <br /> disposal Following purging, the depth to ground water was measured to ensure that a minimum of <br /> 80% well-volume recharge had been achieved prior to sampling <br /> I <br /> IAdvanced GcoEnvironnwntal,Inc <br />