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' Quarterly Report - Third Quarter 2001 <br /> I K & S GAS & GROCERY <br /> 701 East Charter Way, Stockton, California <br /> I1.0. INTRODUCTION <br /> At the request of Mr Khaldoon Othman of K & S Grocery, Advanced GeoEnvironmental, Inc <br /> (AGE)has prepared this quarterly report for the property located at 701 East Charter Way, Stockton, <br /> California The scope of work included quarterly ground water monitoring and preparation of this <br />' report The site setting is illustrated in Figure 1 Structures and monitoring well Iocations are <br /> illustrated in Figure 2 <br /> Site background information was summarized in the AGE-prepared Monitoring Well Installation <br /> Report, dated 02 June 1999 Data from previous ground water monitoring events is summarized in <br /> the tables of this report <br /> 2 0. PROCEDURES <br />' Field work wasp erformed in accordance with guidelines established by the California Regional <br /> Water Quality Control Board-Central Valley Region for investigation of underground storage tank <br /> (UST) sites <br /> I2 1 WELL MONITORING AND EVACUATION <br />' On 14 September 2001, a Solinst water level meter was used to measure the depth to ground water <br /> in monitoring wells MW1 through MW3 relative to the tops of the well casings (well heads) The <br /> ground water elevations and gradient were determined from these data(Table 1) <br />' After recording water level measurements, disposable polyethylene bailers were used to evacuate <br /> each well of standing water Approximately 3 casing-water volumes were removed from each well- <br />' 10 gallons from MW-1 and 6 5 gallons each from MW-2 and MW-3 Ground water temperature,pH <br /> and conductivity were measured at regular purge-volume intervals during evacuation using an <br /> Oakton water analyzer Field sheets and data are included in Appendix A Evacuated water was <br />' stored on-site in labeled, 55-gallon DOT-approved drums <br />' 22 COLLECTION OF GROUND WATER SAMPLES <br /> The depth to ground water was measured in each well following evacuation to assure a mmimum <br /> of 80%recharge prior to sampling Water samples were then collected using new disposable plastic <br /> bailers Each water sample was transferred into 40-m1 VOA vials containing 0 5 ml 18% <br /> hydrochloric acid as a sample preservative The sample vials were then labeled with the monitonng <br /> Advanced GeoEnvironmental,Inc <br />