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�h <br />• October 10, 1996 p` { 1 r AICE <br /> 96 OCT 15 PI1 I= I I <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 LUFT 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 tete tetra quarter report, along with an <br /> evaluation of the monitoring capabilities of the site <br /> Comments on May 1, 1996 Work Plan <br /> Enviros, Inc 270 Perkins Street Sonoma California Tel 707/935 4950 <br /> P 0 Box 259 95476 0259 Fax 707/935 6649 <br />