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1 <br /> Quarterly Report - Fourth Quarter 2002 <br /> QUICKI-KLEEN CAR WASH <br /> ' 707 East Yosemite Avenue, Manteca, California <br /> ' 10. INTRODUCTION <br /> At the request of Ms MaryLou Pontes of Quicki-Kleen Car Wash,Advanced GeoEnvironmental, <br /> Inc (AGE)has prepared this quarterly report for the property located at 707 East Yosemite Avenue, <br /> Manteca, California The scope of work included monitoring and sampling three ground water <br /> monitoring wells and preparation of this report The site and the surrounding area are illustrated on <br /> Figure 1 Structures, boring and well locations are illustrated on Figure 2 Background information <br /> is summarized in the AGE-prepared Preliminary Investigation and Evaluation Report, dated <br /> ' 19 March 2001 Ground water analytical data from the current and previous investigations can be <br /> found in Tables I and 2 <br /> ' 2.0. PROCEDURES <br /> ' Field work was conducted and this report was prepared in accordance with guidelines issued by the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB) for subsurface investigation <br /> of underground storage tank (UST) sites and guidelines issued by the San Joaquin County <br /> ' Environmental Health Department (EHD) for sampling ground water monitoring wells <br /> ' 2 1 WELL MONITORING AND EVACUATION <br /> Ground water sampling of wells MW 1,MW2 and MW3 was conducted on 07 November 2002 For <br /> the sampling event,a Solmst water level meter was used to measure the depth to ground water in the <br /> three wells relative to the tops of the well casings The ground water elevations and gradient were <br /> determined from this data(Table 1) <br /> ' Amer recordingwater level measurements, disposable plastic bailers were used to urge the wells <br /> p p P <br /> of standing water,approximately 3 0 to 3 35 gallons ofwater(a minimum of 3 casing water-volumes <br /> ' per well) were removed from each well Ground water temperature, pH and conductivity were <br /> measured at regular intervals during purging using an Oakton water analyzer Purged ground water <br /> was containerized in properly labeled DOT-approved model 17H 55-gallon drums and stored on-site <br /> ' Field sheets and data are included in Appendix A <br /> ' 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> ' Water samples were collected from each purged well using new disposable plastic bailers after <br /> . allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> sample was transferred into three 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />