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1 <br /> AZURE ENVIRONMENTAL <br />' Water table elevation data collected at the Site indicate the general direction of ground-water <br /> flow is toward the northeast, with local variations of flow direction in the area adjacent to the <br /> former tank locations at the Site (Figure 3) These data are generally consistent with <br /> tpotentiometric data and interpretations of ground-water flow direction at the Site presented in <br /> previous investigation reports Shallow ground water in the site vicinity flows toward the <br /> northeast under a hydraulic gradient of approximately 0 002 ft/ft <br />' .2 3Ground-Water Sam lin <br /> .�. and Laboratory Analysis <br />' On March 26, 1996, ground-water samples were collected from two downgradient monitoring <br /> wells at the Site (MW-9 and MW-10) Historical laboratory analysis results are summarized in <br />' Table 3, laboratory certificates are included in Appendix A and field sampling data sheets are <br /> included in Appendix B Most recent ground-water monitoring data are illustrated in Figure 4 <br />' Monitoring data collected for wells MW-9 and MW-10 in March 1996 indicate petroleum <br /> hydrocarbons, including benzene (<0 5 ppb) and MTBE (<50 ppb), were not detected <br /> These data are generally consistent with historical monitoring results, which indicate benzene <br />' has not been detected at MW-9 since January 1995 (0 6 ppb) and at MW-10 since October <br /> 1994 (0 6 ppb) These data continue to indicate the petroleum hydrocarbon plume has <br /> stabilized and is restricted to shallow ground water in the area adjacent to the former tank <br /> locations at the Site <br /> 4.0 TECHNICAL STATUS REPORT <br /> Work Completed Durmg the Janua1y through March 1996 <br />' Work completed during the previous quarter included performance of the quarterly ground-water <br /> monitoring program <br />' It is estimated that approximately 10,000 gallons of purge water are temporarily stored at the Site <br /> in drums and a Baker tank In March 1996, Azure pumped the drum water into the Baker tank <br />' and collected a water sample for chemical analysis The water sample analysis results will be used <br /> to evaluate purge water disposal options, including permitting and discharge into the sanitary <br /> sewer system or on-site treatment and disposal <br /> Work Expected to be Completed During the April through June 1996 Quarterly Period <br /> T <br />' Work expected to be completed during the next quarter includes continued performance of the <br /> quarterly gi ound-water monitoring program <br />' During the next quarter, Azure plans to evaluate soil treatment cell data and develop a plan for <br /> closure of the soil treatment cell A soil closure plan is expected to be completed during the April <br /> through June quarterly period <br /> 2 <br />