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Clayton <br /> ENVIRONMENTAL <br /> CONSULTANTS <br /> Mr. Michael Infurna Page 2 <br /> San Joaquin Co. PHS-EHD Project No. 46514.00 <br /> February 12, 1993 <br /> diameter sampler. Stainless steel cylindrical slee'es (2 inch diameter and 6 inch long) <br /> will be driven into the soil with a drive sampler, The soil sampling cylinder will be <br /> completely filled with soil so that no headspace s present in the ends of the sampling <br /> tube. The ends of the sleeve will be covered wi h Teflon TI sheeting and polyethylene <br /> caps and sealed with Scotch 33+T' electrical tape. The samples will then be labeled, <br /> placed in self-sealing plastic bags, placed under is in a portable cooler and transported, <br /> following standard chain of custody procedures, to a laboratory certified by the State of <br /> California, Department of Health Services for analysis. <br /> The samples will be analyzed for VOCs by means of EPA Method 8015/8020 modified <br /> for gasoline, and for organic lead. <br /> The boreholes and soil samples will be describ d by a Clayton geologist under the <br /> supervision of a California registered geologist using the Unified Soil Classification <br /> System (USCS). A photoionization detection ( ID) meter will be used to measure <br /> breathing zone and borehole concentrations of potential VOCs during the drilling <br /> activities. <br /> After the removal of all drilling and sampling devices from a borehole, the borehole will <br /> be backfilled to three feet below grade either with pure portland cement or with <br /> rehydrated VolclayT"clay chips and then to gradewith concrete. The same abandonment <br /> procedures will be followed for each borehole. <br /> If you have any further questions, please contact me at (714) 229-4806. <br /> Sincerely, Reviewed by: <br /> ( qDk�� <br /> Marco Pecile David H. Randell, R.G. <br /> Environmental Consultant Manager, Environmental Engineering <br /> Pacifix Operations <br /> Attachments <br /> cc: Mark Ingram, Wells Fargo Bank, Corporate Properties Group Manager <br /> Barbara Reeve-Bailey, Wells Fargo Bank, Corporate Properties Group <br /> Jaswant Singh, CIH, Ph.D., Director, Pacific Operations <br /> P:1Pub1ic\EE1 W P511e46514.wp <br />