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Quarterly Report - Second Quarter 2001 <br />' K& S GAS & GROCERY <br /> 701 East Charter Way, Stockton, California <br />' 1.0. 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 locations 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 <br />' 2.0. PROCEDURES <br />' All field work was performed in accordance with California Regional Water Quality Control Board <br /> guidelines for sampling ground water monitoring wells and investigations of underground storage <br /> tank (UST) sites <br />' 2 1 MONITORING WELL PURGE PROCEDURES <br /> On 20 June 2001, a Solinst water level meter was used to measure the depth to ground :eater in <br />' 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 polyvinyl chloride (PVC) bailers were used <br /> to purge each well of standing water Approximately 3 casing-water volumes were removed from <br /> each well, 12 gallons from MW-1 and 8 gallons each from MW-2 and MW-3 Ground water <br />' temperature,pH and conductivity were measured at regular purge-volume intervals during purging <br /> using a Hydac water analyzer Field sheets and data are included in Appendix A Purged water was <br /> stared on-site in labeled, 55-gallon DOT-approved drums <br /> 2 2 COLLECTION OF GROUND WATER SAMPLES <br />' e water was measured in each well following purging to assure a minimum of <br /> Th depth to ground g P g g <br /> 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 monitoring <br /> well designation,date,time of sampling and the sampler's initials The samples were transported in <br /> Advanced GeoEnvirenmental,Inc <br />