ARCHIVED REPORTS XR0009478 - Laserfiche WebLink

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AZURE ENVIRONMENTAL Ground-water monitoring data continue to indicate the petroleum hydrocarbon plume has stabilized and is restricted to shallow ground water in the area adjacent to the former tank locations at the Site Residual petroleum hydrocarbon concentrations in Site ground water are expected to continue to decrease as a result of biodegradation and/or other attenuation processes 4.0 TECHNICAL STATUS REPORT ' Work Completed During the Fourth Quarter 1996 ' Work completed during the fourth quarter included performance of the quarterly ground-water monitoring program ' The report entitled "Soil Sampling Results and Recommendation for Soil Treatment Cell Closure" was submitted to the San Joaquin County Public Health Services on December 26, 1996 Based on the evaluation of soil sampling results presented in the report, it was recommended that no ' further remedial actions for treatment cell soil at the Site were necessary and that the treatment cell should be approved for closure ' Site closure requirements were discussed in a telephone conversation with Mr Harlan Knoll of the San Joaquin County Public Health Services on November 12, 1996 In our conversation, it was agreed that quarterly monitoring data indicate the petroleum hydrocarbon concentrations in ground water have stabilized and are generally decreasing It was also agreed that remedial actions do not appear to be warranted at the Site In addition to collecting quarterly monitoring data for a period of at least 1 to 2 years, Mr Knoll requested the following information be included with a site closure recommendation 1) an inventory and survey of wells within a 2,000-foot radius of the Site, and 2) the status of the fire prevention system water well and septic system at the Site Work Expected to be Completed During the First Quarter 1997 ' Work expected to be completed during the first quarter includes continued performance of the quarterly ground-water monitoring program 3 "