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Quarterly Report - October 1997 <br />' ART & ARTISTS <br /> 204 East Lodi Avenue, Lodz, California <br /> 10. INTRODUCTION <br />' In accordance with a request from Ms Mary Lehr,Advanced GeoEnvironmental, Inc (AGE) has <br /> prepared this Quarterly Report for 204 East Lodi Avenue, Lodi, California Quarterly ground water <br /> monitoring activities were performed on 23 October 1997 Background information on the site was <br />' summarized in the Closure Summary Report prepared by AGE in April 1997 The location of the <br /> site and its surroundings are illustrated in Figure 1 -Location Map Structures and well locations on <br /> the site are illustrated in Figure 2 - Site Plan <br />' The monitoring activities were perfa <br /> rmed in accordance with guidelines for investigation of <br /> underground storage tank (UST) sites established by the San Joaquin County - Public Health <br /> Services - Environmental Health Division (PHS-EHD) and by the Central Valley Regional Water <br /> Quality Control Board(CVRWQCB) <br /> 1 <br /> 20 PROCEDURES <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br />' On 23 October 1997, a Solmst water level meter was used to measure the depth to ground water in <br /> each well, except MW-2, relative to the tops of the well casings The relative ground water <br /> elevations were calculated by subtracting the measured ground water depths from the surveyed <br /> 1 casing elevations (Table 1) <br /> After recording the depth to ground water measurements, monitoring wells MW-1 and MW-3 <br />' through MW-8 were purged using pre-cleaned PVC bailers A minimum of three well volumes of <br /> water was removed from each well Ground water stabilization parameters (temperature, pH and <br /> electrical conductivity)were measured during purging at regular intervals in each well using an ICM <br /> water analyzer Purged water was stored on-site in 55-gallon drums Stabilization data and field logs <br /> are included in Appendix A <br /> 22 COLLECTION OF GROUND WATER SAMPLES <br /> 1 Water samples were retrieved from each purged well using new disposable bailers The samples <br /> were transferred into 40-m1 EPA-approved VOA vials containing 0 5 ml of 18% hydrochloric acid <br />' as a preservative and were transported in a chilled container, under chain-of-custody, to Alpha <br /> r� Analytical Laboratories (AAL) in Ukiah All samples were analyzed for total petroleum <br /> hydrocarbons quantified as gasoline(TPH-g)in accordance with method 5030, for volatile aromatics <br /> 1 <br /> AiNanced GeoEnvironmentai,Inc <br />