SITE INFORMATION AND CORRESPONDENCE

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a 4r �J Ge0k9icdTedmics lrw- Page 2 ;`- McGranahan(Gawne Road) Cost Pre-Approval Project 251.2 April 30, 1996 On September 9, 1995, SJCEHD requested that additional work be performed to further define the extent of soil impacted by the release from this tank. GTI prepared a plan for additional site characterization work on October 13, 1995 which was approved on October 19, 1995. Over the next several months the conceptual plan for addressing the characterization of the soil and chemistry of this site changed several times as GTI worked with SJCEHD to evaluate the most cost effective investigative procedures to perform to provide adequate information for the risk evaluation and to determine if engineered remediation will have to be performed to protect human health and the environment. What resulted was a series of work plan addendum's as the thought processes evolved and the new direction was understood a little clearer. The work plan, addendum's and pertinent correspondence is enclosed. Proposed Direction of Project s to get this project into the remedial phase in soon Early in the process, Mr. McGranahan intend as possible. Therefore Mr. McGranahan requested a feasibility study be performed during this phase of the work, with the goal to request bids for site cleanup by Summer 1996 The work settled on was to drill 3 more boreholes and to collect geologic, geochemical, geotechnical/chemical data. This information can then be used in a risk evaluation to evaluate the fate and transport of the chemicals in the subsurface. The risk evaluation will begin with performing a basic R.BCA Tier 1 following the ASTM standard E 1739-95. If the site fails this evaluation, then GTI will work with SJCEHD to evaluate the next best step to take for evaluating the risk of leaving the gasoline in the soil. Proposed Bidding of Project To remain in compliance with the USTCFP, GTI has put out to bid the drilling, soil dispWal, chemical testing and geotechnical testing work that needs to be performed for site characterization. Because the unit costs for Geological Technics Inc. have been reduced from the earlier work, we believe it reasonable that our project planning and preparation, geologic logging, project supervision, report preparation is in line with the USTCFP guidelines. The bids for hollow stem auger the drilling, soil disposal, chemical testing and geotechnical testing are enclosed. These contractors were selected because they have demonstrated: • overall efficiency • the ability to perform work in a professional manner • the ability to keep in budget, unless unforeseen conditions change the scope of work Geological Technics Inc. accepts field support services and lab invoices and adds a 15% overhead fee. We then pay these charges and assist McGranahan in filling out the USTCFP reimbursement claim. Construction contractors will invoice McGranahan direct since Geological Technics Inc. is not a licensed contractor.