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• <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> FACILITY: Defense Distribution Region West, Tracy JUN 17 1994 <br /> LOCATION: Tracy, CA ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> CONSULTANT: Montgomery Watson <br /> PROPOSAL DATE: 9 June 1994 Letter from Mr. Daniel M. Johnson (Montgomery <br /> Watson) to Mr. Steve Light (Department of the Army, Army <br /> Corps of Engineers) transmitting the IRM Expansion - <br /> Installation of Injection/Extraction Wells and Chimney Drains <br /> Workplan with copy to Ms. Margaret Lagario (San Joaquin <br /> County Public Health Services, Environmental Health Division). <br /> [x] 10 Piezometer(s) <br /> [x] 7 Extraction Well(s) <br /> [x] 1 Injection Well(s) <br /> [x] 2 Chimney Drain(s) <br /> We have reviewed the above proposal concerning the above check items and the proposal is <br /> acceptable. <br /> Date: 16 June 1994 Staff Signature: <br /> AREN A. ESSETTE <br /> Sanitary Engineering Associate <br /> Comments: <br /> 1. The volume of each filter pak must be verified prior to the placement of the <br /> transition seal material. <br /> 2. Each bentonite transition seal should be allowed to hydrate for at least one <br /> hour prior to placement of remaining seal material in annular space. <br />