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7/12/96 <br /> Mr. Michael Infurna <br /> Page 2 <br /> Taken in aggregate, I believe that the data supports a determination of"no further action" <br /> and a letter of case closure. <br /> You may note that groundwater samples were collected before and after well purging. <br /> This information will be used to evaluate the efficacy of well purging practices for <br /> petroleum hydrocarbon sites. This study is being conducted under the auspices of the <br /> Western States Petroleum Association. Let me know if you are interested in seeing the <br /> results of this work, and I'll send you a copy of the report. <br /> October 31, 1995 Letter <br /> By copy of this letter to Mr. Brady Nagle of Alisto Engineering Group, be certain that all <br /> report drawings show the existing and former configuration of the site, and the <br /> identification of traffic boxes. Also, forward your recommendations for vault repairs <br /> necessary to ensure the collection of representative data to assess the extent of the <br /> release. <br /> March 11, 1996 Letter <br /> First, please note that BP will attempt to keep your office informed of conclusions and <br /> plans for future work in the cover letters accompanying the quarterly monitoring reports. <br /> Your letter also included seven minimum information requirements for quarterly <br /> reporting. I will take this opportunity to provide it, or explain why it may not be <br /> necessary or applicable at this particular site. <br /> Status of the investigation and cleanup activities including the results of all <br /> investigations completed to date. <br /> The status of this investigation is groundwater monitoring. Results will be provided in <br /> written reports, with plans for future work described in the accompanying cover letter. <br /> Please consider this the status quo unless you receive different information in the future- <br /> Proposed, <br /> uture. <br /> Pro osed continuing, or next phase of investigation. <br /> P � g <br /> The investigation at this time consists of quarterly groundwater monitoring. Well MW-7 <br /> is sampled quarterly, with the remaining wells sampled semi-annually. At this time, we <br /> would like to receive a determination of case closure and a letter of"no further action". <br /> If the San Joaquin County Public Health Services cannot grant this request at this time, <br /> please give me a call and let me know what is necessary to close this site. At a minimum, <br /> it seems to me that a reduction in the frequency of sampling and reporting is warranted. <br />