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_Quarterly Report, 21 <br /> Fourth Quarter 2004 <br /> • .' WELDON CHRCH PROPERTY <br /> 104 West-Beverly Place, Tracy,.California - <br />' 1.0. INTRODUCTION. <br /> 'At the request.of Mr. Weldon Church,.Advanced GeoEnvironmental;Inc.,(AGE)has prepared-this- <br />' quarterly ground water monitoring report for the site at'104 West Beverly Place,Tracy, California. , <br /> "The scope of-work-included the, monitoring and sampling of eight wells and preparation of this " <br /> report. The site location is illustrated on Figure L.Locations of structures,borings, and monitoring <br />' wells related.to the site are 'illustrated on Figure I. Site background information is provided-in <br /> Appendix A. <br /> 2.00 ' PROCEDURES <br />' The December 2004 monitoring.event was peiformed'in accordance with Central Valley Regional <br /> Water Quality Control-Board(RWQCB)and San Joaquin County Environmental Health Department ; <br /> (EHD)guidelines for investigation of underground storage tank(UST)sites and for sampling ground <br /> water monitoring wells. <br /> 14 '12-.1'." <br /> NITORING AND EVACUATION WELL MO • <br /> On 16 December 2004, a Solinst water Ievel meter was used to measure the depth to ground water <br /> . ..• -' 'in ground water monrtonngwells MW-1 through MW-7 relative to the tops of the well casings.After <br /> ground water depth measurements were collected, each monitoring-Well was.purged using a new <br /> disposable, plastic bailer: Between 2.25 and 7.5 gallons of water were evacuated from each <br /> monitoring'well, a minimum.of three casing-water volumes per-well. <br /> ;Temperature,pH, and,conductivity were measured at regular gallon intervals,as appropriate,using' <br /> an Oakton water.analyzer to monitor stabilization of these ground water parameters. Field data logs' <br /> are•included in Appendix B. Purged water was temporarily stored on-site in 55-gallon Department . <br />' of Transportation(DOT)-approved storage drums pending proper disposal. <br />' 2.2. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br />' .J Water samples were collected from rrioriitoririg wells'MW-1 through'MW=7 using new disposable, <br /> bailers..The samples were transferred into 40-milliliter(ml)EPA-approved volatile organic analysis <br /> (VOA)vials containing 0:5 ml 1$%hydrochloric acid solution as a preservative. The sample vials ; <br /> were them labeled with the monitoring well designation, date, time of sampling, and the sampler's <br />' <br /> initials., e,,.; <br /> IAdvanced GeoEnvironmental,Inc. <br /> 1 <br /> t <br />