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• Quarterly.Report -Second Quarter 2003 WELDON CHURCH PROPERTY ' 104 West Beverly'.Place, Tracy,'California 1.0. INTRODUCTION . .,At the`request of Mr Weldon Church,Advanced Geo'Enviroz mental, Inc. (AGE) has prepared this t 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 .. ' 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 June 2003 monitoringevent was performed in accordance with Central Valle Re onal Water p Y � Quality Control Board(CVRWQCB) and San Joaquin County Environmental Health Department I (EHD)guidelines for.investigation of underground-storage tank(UST)sites and for sampling ground water monitoring wells, respectively. 2.1. WELL MONITORING AND EVACUATION On 20 June 2003, a Solinst water level meter was used to measure the depth to ground water in , ground water monitoring wells MW-1 through MW-7 relative to the top of the well casing. After ground water depth measurements were collected,each measured monitoring well was purged using a new disposable plastic bailer: Between approximately 4 and 10'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 and 2 gallon intervals, as appropriate,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 55-gallon DOT-approved H-17 storage drums pending proper disposal. 2.2. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES . I Water samples were collected from monitoring wells MW-1 through MW-7 using new disposable bailers. The samples.were transferred into 40-m1 EPA-appr6ved volatile organic analysis (VOA) vials containing 0.5 ml 18%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. . Advanced GeoEnvironmentai;Inc.