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DRILIJIC,WELL,CONSTRUCTION, AND SAMPLING pR0'rCC OLS <br /> FOR <br /> BOREHOLF- MOWORING WELL INSTAiZATiON <br /> OLE <br /> Clayton Environmental Consultants, Inc acquires the proper governmental agency permits to <br /> bore, drty, or destroy all proposed boreholes and monitoring wells that intersect with <br /> groundwater aquifers aad 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 Matenals Safety Tracing. Prior to starting work, a"tailgate"safety meeting <br /> mchxhng discussion of the safety hazards and precautions relevant to the particular job will be <br /> held with all personnel working on the fob. Well drillers are ;demrficd on permit apphcaticiaL <br /> Borings are drilled dry by hollow-or solid-stem,continuous flight augers. Augers, dray rods, <br /> and other worltmg components of the drilling rig are steam-cleaned before arcing onsite to <br /> prevent the introduction of contaminants. These components are also stearin-cleaned bemeen <br /> borings away from boring locations. Cleaned augers, rods, and other components are stored, <br /> and/or covered when not to use. <br /> Our bore logs include a detailed description of subsurface strattgraplry. Clayton eines the <br /> soil brought to the surface by drdlmg operations, and samples undisturbed soil every 5 feet or <br /> as otherwise sperm. Soil cuttings are screened for bydrocarbon contam inatton using a <br /> phot tion detector. guru$logs are filed out in the field by a professional geologist, <br /> civil 9WkV st who is registered by the State of California,or a <br /> tecbntcian w ie traned and working under the supervision of one of the previously <br /> mermoned �&t- <br /> PORM&N using the Unified Soil Classification S)rstenn. <br /> SABRLM <br /> +�l1yr <br /> Soil samples are taken every 5 feet, at area of obvious contamination, or as otherwise <br /> specified,with a California modified spht-spoon sampler that is WW with three sra-inch brass <br /> tubes. The sampler and cod are inserted into the borehole to the current depth and a <br />