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`7-1996 1 : 1 3PM FROM P_ 5 <br /> en viros,., <br /> October 10, 1996 <br /> Ms. Mary Meays <br /> San Joaquin County Public Health Services <br /> P.O. Box 388 <br /> Stockton, California 95201-0388 <br /> RE: Shell Service Station <br /> 6131 Pacific Avenue <br /> Stockton, California <br /> WIC 204-7525-0104 <br /> Dear Ms. Meays: <br /> This letter is prepared in response to San Joaquin County Public Health Services <br /> (SJCPHS) correspondences dated May 9, 1996 and August 15, 1996. These <br /> correspondences address several issues. Responses to these items have been prepared <br /> individually. <br /> Field Notes for February 28 and May 16, 1996 Sampling Events <br /> As requested, the field notes for these events are enclosed. Additionally, field notes for <br /> future sampling events within SJCPHS's jurisdiction will be included with the quarterly <br /> monitoring events. <br /> Depth to Water Measurements <br /> Depth to water is measured and recorded on the field data sheets prior to purging activities. <br /> Shell's protocol for ground water sampling calls for wells to be recharged to 80% of their <br /> static levels after purging,prior to sampling. This is consistent with GUFF Manual and <br /> SJCPHS guidelines. Typically, wells in this area do not de-water and recharge sufficiently <br /> to meet this sampling protocol immediately after purging. In response to your request,we <br /> propose to measure and record the depth to water immediately following purging activities <br /> during fourth quarter sampling events. Any wells which do not achieve adequate recharge <br /> immediately will be noted and checked again during subsequent sampling events. For <br /> wells which do not pose a problem,collection and recording of post-purge water levels will <br /> be a one-time event. <br /> Collection of Ground Water Samples from Well VE-2 <br /> As requested,ground water samples were collected from this well during the third quarter <br /> sampling event. Results will be reported in the third quarter report,along with an <br /> evaluation of the monitoring capabilities of the site. <br /> Comments on May 1, 1996 Work Plan <br /> Enr/ron. Inc. 310 PerklnS Street Scnpm,0.(;,,Idornr0 Tvl)0]/9!5.4850 <br /> PA 50n Z59 ru W, M.6619 <br />