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Ms Mary Meays <br /> San Joaquin County <br />' December 6, 1994 <br /> Page 3 <br /> Groundwater Monitoring Analytical Results - The analytical results are presented on Table 1 <br /> together with the results from the three previous quarters No petroleum hydrocarbon-related <br /> constituents were detected above analytical method reporting limits during this most recent <br /> sampling period nor during the first and second quarters of this year Only a trace level of diesel <br /> was detected during the initial sampling (October 1993) These results, together with previous <br /> submittals to the San Joaquin County Public Health Service Agency, indicate that the previously F <br /> implemented remedial actions, and naturally occurring degradation, have successfully remediated <br /> the petroleum hydrocarbon-related groundwater conditions at 4110 Industrial Way <br /> We recommend that the Agency consider this site for administrative closure In anticipation and <br /> in compliance with the Agency's request for specific additional information, we have compiled and <br /> presented this data in the following section <br /> Closure Documentation - This data section has been formatted to directly complement the <br /> outline presented in Appendix B of the Central Valley Regional Water Board's (CVRWB) <br /> "Recommendations for Closure Requests" dated 1 March 1994 The numbering is consistent with <br /> ithat in the CVRWB document <br /> 1. " Distance to production wells for municipal, domestic, agriculture, industry <br /> and other uses within 2000 feet of the site" (CVRWB) <br /> This information is illustrated on Figure 3 and additional well data is presented on Table 2 <br /> 2. "Site maps, to scale, of area impacted showing locations of former and <br /> existing tank systems, elevation contours, gradients, and nearby surface waters, <br /> buildings, streets, and subsurface utilities" <br /> Site maps are presented as Figure 2 of this report and Figures lb and 2 in the well <br /> installation report (dated November 18, 1994) presented in Attachment D <br /> 3. "High and low ground water levels (below ground surface)" <br /> 1 <br /> Groundwater was encountered during drilling for monitoring well MW-1, on September <br /> 29, 1993, at a depth of 13 2 feet below ground surface The stabilized water level was <br /> measured at about 10 5 feet on October 4, 1993 and 9 9 feet on September 29, 1994 <br /> 4. "Tabulated results of all sampling and analyses" <br /> All results for groundwater collected from monitoring well MW-i are presented in Table 1 <br /> of this report and the analytical results for soil and groundwater collected subsequent to <br />