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Quarterly. Report•-,Fourth.Quarter 2002 WELDON CHURCH PROPERTY I104 West Beverly Place, Tracy, California ' 1.0. INTRODUCTION At the request of Mr. Weldon Church,Advanced GeoErivironriienta1, Inc. (AGE) has prepared this IV quarterly ground water monitoring report for the site'at 104 West Beverly Place, Tracy, California ; (the site). The scope of work included monitoring and sampling eight wells and preparation of this I report. The site location.is illustrated on Figure.l..Locations of structures, borings and monitoring, Wells related to the site'aare illustrated'on Figure 2., Site background information is provided in' , Appendix A. 2.0: ' PROCEDURES ' The December-2002 monitoring event was erformed in accordance with Central Vallcy;Regional . Water Quality Control Board (CVRWQCB) and San Joaquin County Environmental Health ' Department (EHD) guidelines for investigation of underground storage tank (UST);sites and for sampling ground-water monitoring wells, respectively. 2.1. WELL MONITORING AND EVACUATION Ori.T9"December 2002, a Solinst water levelmeter was used to measure the depth to ground water in groundwater monitoring wells MW-'l through MW-7 relative to the top of the well casing.After groundwater depth,measurements were collected,each measured monitoring well was purged using ' a new disposable plastic bailer. Between approxi'rriately 4 and 9.7 gallons of water were evacuated from each monitoring well, a minimum of three-casing-water volumes per well. ' Temperature;pH and conductivity were measured at 1 to 3-gallon intervals, as appropriate,using an Oakton water analyzer to monitor stabilization oftheseground water parameters. Field data'logs are included in Appendix B. .Purged water was 'temporarily' stored on-site in 55-gallon ' DOT-approved H-17.storage drums pending'proper.disposal. ' 2.2.' COLLECTION AND ANALYSIS OF'GROUND WATER SAMPLES" ' Water sa'mp' les were collected from monitoring wells MW=1 through MW-7 using'new disposable bailers..The samples' were transferred into 40-mi .EPA-approved vials containing 0.5,.ml 18% T hydrochloric acid as a preservative. 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 McCampbell' Analytical, Inc. (MAI); a California Advanced CeoEnvfronmental,.Ine.