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A <br /> ^' I Quarterly Report - First Quarter1 2004 <br /> • FLAME MINI-MART { <br />' 1301 West Kettleman Lane, Lodi, California <br />' 1.0. INTRODUCTION <br /> Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for 1301 West <br />' Kettleman Lane (the site), Lodi, California The scope of work included conducting a quarterly <br /> ground water monitoring event and preparation of this report, the objective of the work was to <br /> assess, characterize and monitor dissolved petroleum hydrocarbon concentrations in ground water <br />' and to calculate ground water flow direction and gradient on the site The site setting is illustrated <br /> in Figure 1 Site structures and monitoring well locations are depicted in Figure 2 <br />' This report has been prepared in accordance with guidelines issued by the California Regional Water <br /> Quality Control Board(RWQCB)-Central Valley Region for investigation of underground storage <br />' tank (UST) sites <br /> History and findings from previous investigations at the site are summarized in Appendix A <br /> 2.0. PROCEDURES <br />' Six monitoring wells (MW-1 through MW4, MW6 and MW-7) were monitored, purged and <br /> sampled in February 2004 Field work was performed in accordance with San Joaquin County <br /> Environmental Health Department (EHD) guidelines for sampling ground water monitoring wells <br />' and Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for <br /> investigations of underground storage tank(UST) sites <br />' <br /> 21 WELL MONITORING AND PURGE PROCEDURES <br /> On 12 February 2004 the depth to ground water in the six monitoring wells was measured from the <br /> top of each well casing to the nearest 0 01-foot utilizing a Solinst water level meter After water <br />' levels were measured, approximately 5 5 to 6 0 gallons of water (a minimum of 3 casing-water <br /> volumes per well) were purged from monitoring wells MW-1 through MW-4 and MW-6 and <br /> approximately 17 75 gallons ofwater were removed from well MW-7 using a Watera hydrolift pump <br /> and dedicated tubing Ground water temperature, pH and conductivity were measured at regular <br />' intervals during purging using an Oakton water analyzer Field sheets and data are included in <br /> Appendix B Purged water was stored in properly labeled Department of Transportation (DOT)' <br />' approved 55-gallon drums and stored on-site <br /> Due to technician error AGE returned to the site on 23 February 2004 to re-measure the depth to <br />' ground water in the six monitoring wells using the above mentioned techniques Ground water <br /> . elevation in each well was then calculated by subtracting the 23 February 2004 measured depth to <br /> ground water from the surveyed casing elevation (Table 1) Field sheets and data are included in <br />' Appendix B <br /> Advanced GcoEnvironmental,Inc <br /> ' I r <br />