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ff. <br />:.T <br /> t <br /> 8 <br /> DRUJJNG, WELL CON MUCrION,AND SAMPLING PROTOOOLS <br /> FOR <br /> -- BOREHOL>;IMONTI'ORING WELL INSTALLATION <br /> - BO��or�nvsTArrLa►.Troiv <br /> Clayton Environmental Consultants, Inc.acquires the proper governmental agency permits to <br /> bore, drill, or destroy all proposed boreholes and monitoring wells that intersect with <br /> groundwater aquifers and writes a health and safety plan. <br /> Clayton subcontracts only with drillers who possess a current C-57 water well contractor's <br /> -� license issued by the State of California and whose personnel have attended the OSHA.40- <br /> hour Hazardous Materials Safety Training. Prior to starting work, a"tailgate"safety meeting <br /> including discussion of the safety hazards and precautions relevant to the particular job will oe <br /> held with all personnel working on the job. Well drillers are identified on permit applications. <br /> Borings are drily:d dry by hollow-or solid-stem, continuous flight augers. Angers, dell rods, <br /> and other working components of the drilling rig are steam-cleaned before arriving onsite to <br /> prevent the introduction of contaminants. 'These components are also steam-cleaned between <br /> borings away from boring locations. Cleaned augers,rods, and other components are stored, <br /> and/or covered when not in use. <br /> Our bore logs include a detailed description of subsurface stratigraphy. Clayton examines the <br /> soil brought to the surface by drilling operations,and samples undisturbed soil every 5 feet or <br /> as otherwise:spied. Sort cuttings are screened fc:hydrocarbon contamination using a <br /> photoionization detMor. Baring logs are filled out in the field by a professional geologist, <br /> civil geologist who is registered by the State o California,or a <br /> technician w b-ftiaed and working under the supervision of one of the previously <br /> mentioned,using the Unified Soil Classification System. <br /> ......... <br /> SGTil1 SAl1�'LIhdG <br /> Soil samples are taken every 5 feet, at areas of obvious contamination,or as otherwise <br /> specified,with a California modified split-spoon sampler that is lined with three sbc-inch brass <br /> tubes. The.sampler and rod are inserted into the borehole to the current depth and a <br />