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RIT <br /> woWLAN FOR SUBSURFACE sorb EVALUATION <br /> U.S. <br /> �7��vv SA <br /> �,;; WALLACE•KUHCSR$�[Flti'ES.IRic. .. <br /> KA No. 1004.41 <br /> December 3, 1990 <br /> Page 2 <br /> drilling in an attempt to distinguish any fill materials from native soils. Soil samples for laboratory <br /> testing will be taken in the native soils, as possible. Samples will be screened in the field with an <br /> organic vapor analyzer (OVA). Sample tubes will be sealed with aluminum foil, plagtic caps and <br /> wrapped with tape. <br /> f <br /> Selected samples will be preserved on ice and submitted under chain-of-custody to a certified <br /> analytical laboratory(Western Environmental Science and Technology)for analysis of total petroleum <br /> hydrocarbons (TPH), benzene, toluene, xylene and ethyl benzene (BTX&E). The samples will be <br /> tested on an immediate basis and the detection levels will be 0.5 mg/kg for TPH and 0.005 mg/kg for <br /> BTX&E. Any contaminated soil generated during drilling will be stored on-site in sealed 55-gallon <br /> drums until disposal or remediation of this soil has been approved by the appropriate regulatory <br /> agency. All borings will be tremie backfilled with a 4 to 5-sack cement grout. All work will be <br /> performed under the direct supervision of a registered geologist. <br /> Upon completion of our field work and the laboratory testing, we will prepare a formal report which <br /> will include: <br /> • a site plan showing locations of borings <br /> • logs of borings <br /> ilaboratory test results with chain-of-custody <br /> • conclusions regarding the extent of soil contamination, if any <br /> • recommendations for remediation of contaminated soil and/or further investigation, <br /> if necessary. <br /> Please call us if you have any questions regarding the proposed scope of work. <br /> Wallace - Kuhl & Associates, Inc. <br /> Anthony Sarac' <br /> Certified Engineering Geologist #1420 <br /> attachments: Site Plan <br /> Laboratory Test Results <br /> Site Safety Plan <br /> Copy of Boring Permit <br /> xc: Jeff Post, Post Tank <br /> i <br />