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' Quarterly Report - First Quarter,2006 10 WELDON CHURCH PROPERTY. 104 West Beverly Place, Tracy, California. 1`A: INTRODUCTION y VAt the.request of Mr. Weldon Church,Advanced GeoEn'vironmental, Inc (AGE).has prepared this -quarterly ground water monitoring report for the site at 104 West Beverly Place, Tracy, California. " Thc,scope of work included she 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 Figuie 2. Site background information is provided in Appendix A.' 2.4. PROCEDURES " J The March2006monitoring event wasperformed,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 for sampling ground t water monitoring wells. 2.1. WELL MONITORING AND EVACUATION On 18 March-2006,,a Solinst water level'meter was used to measure the depth to ground water in ' ground water monitoring wells MW-1 ifirough MW-7 relative to the tops of the well casings. After ground Water depth measurements were collected, a minimum of three casing-water volumes were, ' purged, from. each monitoring well using a dedicated disposable plastic bailer. In"addition, temperature,;pH, and conductivity were measured at'zegular purge intervals using an Oakton 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 5 5-gallon Department of Transportation DOT =a o roved storage drums pending proper disposal: 2.2.- . COLLECTION AND'ANALYSIS,OF GROUND WATER SAMPLES Water samples were collected from 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)vials containing 0.5 in1.18%hydrochloric acid solution as a preservative.,The sample vials t ; " were then labeled with the monitoring well designation, date,'time of'sampling, and the gampler's initials. The samples were, transported: in 'a chilled container ,under chain of custody. to Cal Tech Environmental"Laboratorie's.,(CTEL),a',State"of California Department of Health Services (DHS)- 'Advanced GeoEnvironmental,Inc.