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Quarterly Report First.Quarter 2005 WELD_ ON CHURCH PROPERTY '. 104 West Beverly•Place,Tracy., California 1.0.- INTRODUCTION ' At the fequest.of Mr.,Weldon Church,Advanced GeoEnvironmental, Inc..(AGE),has.prepared this,. quarterly-ground water monitoring report for the site at 104 West Beverly Place, Tracy, California. .. The-scope of.work included'the monitoring and sampling of eight wells and preparation of this. report. The site location is illustrated-on Figure 1..-Locations of structures,borings, and-monitoring wells related to the,site are illustrated on,Figure 2. Site background information is provided in Appendix A'. ; 2.0. PROCEDURES, The March 2005 monitoring event was performed in accordance with Central Valley Regional Water .Quality Control Board.(RWQCB) and.San"Joaquin County Environmental Health Department (EHD)guidelines for.investigation of underground storage tank(UST)sites and for sampling ground. water monitoring well's. 2.1. WELL MONITORING AND EVACUATION ' On 22 March 2005, a Solinst water level meter.was used to measure the depth to groundwater in groundwater monitoring wells MW-1 through MW-7 relative to the tops of the well casings: After ground water.depth measufemehts were collected, each monitoring well was purged using`a new disposable plastic bailer. Between 3 and 7 gallons of water were evacuated from each monitoring well, a minimum.of three casing-water,volumes per well. I1 Temperature,pH,and conductivity were measured at regular gallon intervals, as appropriate, using an,O. akton water analyzer to monitor stabilization of these ground water parameters.Field data logs are included in Appendix B. Purged water was temporarily stored on-site in 55-gallon•Department , of Transportation.(DOT)-approved storage drums.pending,proper disposal. 2.2. COLLECTION AND ANALYSIS.OF GROUNDWATER SAMPLES `Water samples-were collected from monitoring wells MW4,through MW-7 using.new disposable ' bailers.-The samples were transferred into 40-milliliter(ml)EPA-approved:volatile organic'analysis (VOA) vials containing 0.5 ml 18%hydrochloric acid solution as a preservative. The sample vials were then labelled with the monitoring well designation, date, time of sampling, and the sampler's ' initials. Advanced GeoEnvirnnmental,Inc.