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Mr. C. Dean Hubbard –Central Valley RWQCB <br />Additional Soil Investigation Work Plan April 29, 2014 <br />TAOC 6th Street Tracy Rail Yard Page 3 <br />• Mark boring locations for Underground Service Alert (USA), and notify USA at <br />least 48 hours in advance, as required by law. <br />• Subcontract a private utility locator to clear the Site of any potential overhead and <br />underground hazards and/or other potential obstacles. <br />• Subcontract a California-licensed (C-57) driller to advance soil borings using a <br />hand auger to a maximum of 10 feet bgs. <br />• Log each borehole for lithology using the Unified Soil Classification System as a <br />guide, including color, relative moisture content, and other observable and <br />distinguishing characteristics (i.e., color changes, debris). <br />• Soil samples will be submitted to a California-certified laboratory for analysis (as <br />described above) under Leidos chain-of-custody protocol. <br />• Place investigation-derived waste in U.S. Department of Transportation-approved <br />containers pending disposal. <br />• Prepare a report describing the investigation, findings, conclusions, and <br />recommendations. <br />All field work will be directed by a California Professional Geologist. <br />Sincerely, <br />Leidos Engineering, LLC <br /> <br /> <br /> <br /> <br />Michael Hurd, CHG 0068 <br />Senior Environmental Project Manager <br /> <br />Enclosures: <br />Figure 1 – Vicinity Map <br />Figure 2 – Site Plan <br />Figure 3 – Proposed Soil Sampling Locations – West Area (OU-5) <br />