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Quarterly•Report - Fourth Quarter 2005 f f WELDON CHURCH PROPERTY 104 West Beverly.Place, Tracy, California 1.0. INTRODUCTION At:the request'of Mr. Weldon Church,Advanced GeoEnvironmental, Inc. (AGE)has prepared,this ' quarterly ground water monitoring report for the site at 104 West Beverly Places Tracy, California. The scope of work included the.monitoring and sampling of eight well's and preparation of this r, 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 December 2005 monitoring event was,performed in accordance with,Central Valley Regional Water Quality Control Board (CVRWQCB) and San Joaquin County Environmental Health Department (EHD) guidelines for investigation of underground storage tank (UST) sites and far " ' sampling ground water monitoring wells. 2.1. WELL MONITORING AND EVACUATION On 10 December 2005, a Solirist water level meter was used to measure the depth to ground water 1 in ground water monitoring wells MW-1 through MW-7 relative to the tops of the well casings.After groundwater depth rileasurements were collected, a minimum of three casing-water volumes.were ' purged.:from each monitoring well using;'a dedicated ,disposable piastic .bailer. In--addition, temperature,pH, and conductivity were measured at regular purge intervals-using an Oakton water analyzer to monitor stabilization of these ground water,parametefs. 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 GROUND,WATER SAMPLES '! Water samples-were collected frorn.monitoring wells MW-1 through MW-7 using new disposable bailers.The samples were transferred into 40-milliliter(ml)EPA-approved volatile organic analysis. (VOA) vial's containing 0.5.m1'.18%Hydrochloric,acid'solution asia preseivative..The sample vials' ' were then labeled,with the monitoring well designation, date;time of sampling, and the sampler's initials. ' 'The'' samples were .transported in a chilled container under chain; of custody' to Cal Tech Environmental Laboratories (CTEL), a State of California Department of Health Services (DHS)-' ' F Advanced GeoEnvironmental,Inc.