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EA ENGINEERING, <br /> SCIENCE, AND " <br /> TECHN©LOGY, INC. <br /> San Joaquin Local Health Districts 20 November 1987 <br /> Page' 2 �' <br /> can be opened only with' al <br /> monitoring �'well cover that <br /> wrench, to ,j'protect the ' well fromiunauthorized entry.:; Each well <br /> will be equipped with a well tag ,jcontaining pertinent informa- <br /> tion. ''After completion, each well will be developed using either <br /> a submersible stainless steel pump "or a PVC bailer (.depending on <br /> yield) .;until the water- is free of sand. <br /> Before .,sampling, each well-i will bepurged, with a piecleane'd <br /> bailer, byremoving 4 or 5icasing volumes of water.': Ground water <br /> samples wiil be collected with .precleaned Teflon ..-bailers . <br /> Samples will be analyzed for TPH:jand VOA using the modified EPA <br /> 624 Methodology. All water samples will be colle;c�t4d in i <br /> appropriate containers with Teflon-..lined caps, whi,cY contain <br /> hydrochloric and sulfuric acid as preservatives— A11 soil !and i <br /> water samples will be placed on ice and shipped under chain of <br /> custody to[la State--certified laboratory. ;. <br /> Soil borings will be logged by aisupervising geologist and <br /> described according to the:' Unified"Soil Classification System. <br /> In addition to the above described field activities; sufficient <br /> information on regional geology and hydrogeologyiiwill be ' <br /> collected, 'sand on the basi's of all' data available the problem ! <br /> assessmentrreport will. be 'developed according to the Guidelines <br /> For Site Assessment, Cleanup, and Underground_ Storage Tank ' <br /> Closure of-; the State Water Resoutce Control Board,, July 1982 . <br /> co <br /> � I <br /> t <br /> Ir <br /> e it <br /> CHV7 . 72P <br />