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' Quarterly Report - Second Quarter 2006 <br /> • MEL BOKIDES PETROLEUM, INC. - MOSSDALE <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(site) The scope of work included gauging and sampling <br /> the on-site ground water monitoring well network, submission of monitoring and analytical data to <br />' the State Water Resources Control Board's GeoTracker information management system, and <br /> preparation of this report The site setting is illustrated on Figure 1 Site structures, previous soil <br /> borings, and monitoring well locations are depicted on Figure 2 <br />' Field work waserformed in accordance with Central Valle Regional Water Quality Control Board <br /> p Y g <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 /> included in Appendix A <br />' . 2.0. PROCEDURES <br /> Field procedures were performed in accordance with CVRWQCB guidelines for the investigation <br /> of UST sites and EHD guidelines for the sampling of groundwater monitoring wells The procedures <br /> were performed in accordance with the AGE-prepared and EHD-approved Preliminary Site <br />' Assessment Work Plan, dated 15 September 1999 <br /> 2 1 WELL MONITORING AND EVACUATION <br /> On 08 May 2006,a Solinst water level meter was used to measure the depth to ground water in <br />' monitoring wells MW-1 through MW-5 relative to the tops of the well casings After depth to ground <br /> water measurements were obtained, approximately seven to eight gallons of water were removed <br /> from wells MW-1 through MW-5 (a minimum of three casing water volumes per well) using <br /> dedicated; disposable bailers Temperature, pH, and conductivity of purged ground water were <br /> measured at regular intervals for stabilization using an Oakton water analyzer Field data sheets are <br />' included in Appendix B <br /> Purged water was stored on-site in properly labeled,Department of Transportation(DOT)-approved <br /> 55-gallon drums pending proper disposal Following purging, the depth to ground water was re- <br /> measured to ensure that a minimum 80%well-volume recharge had been achieved prior to sampling <br /> Advanced CcoEnvironmental,Inc <br /> 1 <br />