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.. t <br /> . Quarterly Report - September 1997 <br /> WELDON CHURCH PROPERTY <br /> 104 West Beverly Place <br /> Tracy, California <br /> 1.0. INTRODUCTION <br /> In accordance with the request of Mr. Weldon Church,Advanced GeoEnvironmental, Inc. (AGE) <br /> has prepared the enclosed Quarterly Report for the site at 104 West Beverly Place, Tracy, California <br /> (the site). The scope of work included monitoring and sampling six wells, obtaining laboratory <br /> analyses of the samples, and preparation of this report. The site and its surroundings are illustrated <br /> on Figure 1 -Location Map. Locations of structures and monitoring wells on the site are illustrated <br /> on Figure 2 -Site Plan. <br /> The work was performed in accordance with San Joaquin County Public Health Services <br /> m - <br /> Environmental Health Division (FHS-EHD) and Central Valley Regional Water Quality Control <br /> Board guidelines for investigation of underground storage tank (UST) sites. <br /> Site history and findings from previous investigations and previous monitoring events at the site are <br /> detailed in the Preliminary Investigation and Evaluation Report- September 1996 (PIER) prepared <br /> by AGE. These details were reviewed for the proposed recommendations listed in this quarterly <br /> report. <br /> 2.0. PROCEDURES <br /> 2.1. MONITORING WELL PURGE PROCEDURES <br /> On 05 September 1997, a Solinst water level meter was used to measure the depth to ground water <br /> in each well relative to the top of the well casings. After ground water depth measurements were <br /> collected, each monitoring well was purged using a two-stage submersible pump. Approximately <br /> 6 gallons of water were evacuated from monitoring wells MW-1 through MW-4, 3 gallons were <br /> removed from MW-5 and upper MW-6, and 8 gallons were removed from lower MW-6. Each of <br /> these volumes of purge water are a minimum three well casing volumes for each well. <br /> Temperature, pH and conductivity were measured at 1-gallon or 2-gallon intervals, as appropriate <br /> for each well, using an TCM model 52200 water analyzer to monitor stabilization of these ground <br /> water parameters. Stabilization data and field logs are included in Appendix A. Purged water was <br /> stored in 55-gallon drums temporarily on-site. <br /> 2.2. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from each monitoring well using new disposable bailers. The samples <br /> Advanced GeoEnvironmenta[,Inc. <br />