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Central Valley P[JQ1:B TEL: 916 255 3052 RN. 27. 1993 10:38 RM P 2 <br /> - t <br /> FACILITY: Defense Distribution Region West - Sharpe <br /> LOCATION: Lathrop, CA <br /> CONSULTANT: U.S. Army Corps of Engineers/James M. Montgomery <br /> PROPOSAL DATE: January 1993 Draft Final Pre Design Technical Summary Report <br /> and Remedial Design Work Plan - Operable Unit 1 <br /> Re: Soil Sampling in Proposed Holding Pond Area for Treated <br /> Groundwater. Geochemical and Geotechnical Soil Sampling. <br /> C Monitoring Well(s) <br /> [X] _ 7 Soil Boring(s) <br /> L w Soil Excavation(s) Depth to 0 ft. <br /> We have reviewed the above proposal concerning the above check items and the <br /> proposal is acceptable. <br /> V4Date: 1-7'+-9-3 Staff Signature: <br /> Note: <br /> The proposal calls for drilling 7 boreholes, 18 to 20 feet deep or to <br /> groundwater if encountered first. Boreholes will be backfilled with a <br /> suitable impervious material such as neat cement, or cement-bentonite grout by <br /> methods described in Section 23 of Bulletin 74-81 Water Well Standards, <br /> Department of Water Resources. <br /> JAN 2 7 1993 <br /> ENVIRONMENTAL <br /> SERVICES LTH <br />