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IGround Water Monitoring Report - Second Quarter 2001 •' WELDON CHURCH PROPERTY ' ' 104 West Beverly Place' Tracy, California lA. INTRODUCTION ; At the request of Mr. Weldon Church,Advanced GeoEnvironmental;Inc. (AGE)has prepared'this. : '. quarterly ground watermonitoring report for the site at 104,West Beverly Place,•Tracy, California -•(the site). The scope of work.included monitoring and sampling seven-wells, obtaining laboratory analyses of the samples and preparation of this report. The site setting is illustrated on Figure 1. Locations'of structures, borings and monitoring wells related to the site,are illustrated on Figure 2. ; Site history and findings from previous investigations and previous monitoring events at the site are detailed in Preliminary Investigation and Evaluation Report =,September 1.996 (PIER), dated., -4 September 1996, and Ground Water Monitoring Report -First Quarter 2000, dated 09 August, 2000, both prepared by AGE. 2.0. BACKGROUND The site is located in a residential area of central Tracy,California,in San Joaquin County(Figure 1'). I • y . One house and a detached garage/storage area are currently located on the property. An apartment complex is located immediately west of the former-UST area;'residences are located to the south and east of the site. One small capacity(550-gallon)UST was installed at the site in the.early 1980s.The tank was used to fuel vehicles associated with Church Refrigeration,a company owned and operated ' I' by Mr: Weldon Church. 3.0.' PROCEDURES The May 2001,monitoring event was.perforrned in accordance with Regional Water Quality Control Board'-CentrUValleyRegion (RWQCB-CVR)'and'San'Joaquiri'County Public Health Services- ' Envirom-venial Health Division(PHS-EHD).guidelines for investigation of underground storage tank` h (UST) sites and for sampling ground water monitoring wells, respectively.- 3.1. .3 1. MONITORING WELL PURGE PROCEDURES` K , On 17 May 2001, a Solinst water Ievel�'incter was used to measure fie depth to ground water in each well relative.to the top of the well casing. After,ground,water.depth measurements-were collected, . each monitoring well was purged•using a PVC two-stage submersible pump.Approximately 4 to 9.5 gallons"of'water were evacuated from each monitoring well, a minimum of•three casing-water volumes per well. Advanced GeoEnvirownental,Inc.