SITE INFORMATION AND CORRESPONDENCE_1993-2003

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MEMORANDUM • CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION 3443 Routier Road, Suite A Phone: (916) 255-3000 Sacramento, CA 95827-3098 CALNET: 8-494-3000 TO: enia K. J. Vorster FROM: James Taylor or WRC Engineer Associate Engineering ologist DATE: 4 May 1993 SIGNATURE: SUBJECT: THIRTY PERCENT/DRAFT SUBMITTALS FOR CENTRAL AREA OPERABLE UNIT 1 (OU-1) REMEDIAL DESIGN, DEFENSE DISTRIBUTION REGION WEST (DDRW), SHARPE, SAN JOAQUIN COUNTY I have reviewed the above referenced submittals received 5 March 1993. These documents were prepared by Montgomery Watson (M-W) for the U. S. Army Corps of Engineers (CoE) and include the following 30 percent submittal items: ► Remedial Design Report and Analysis ► Technical Specifications ► Plans The 30 percent submittals are first in a series of submittals which will include 60, 95, and 100 percents Remedial Design documents. Along with the submittal of remedial design documents, copies of draft, draft final , and final work plans will be prepared and submitted for review. The draft plans reviewed include the following: ► Service Contract Document, Personnel Training Plan, Operation and Maintenance Plan ► Construction Quality Assurance Plan ► Field Sampling Plan, Groundwater Monitoring Plan ► Health and Safety Plan ► Remedial Action Work Plan Also reviewed with the 30 percent/draft submittals are the Response to Comments on the Draft Final Pre-Design Technical Summary Report, Remedial Design Work Plan, Draft Work Plan Addendum, and Health and Safety Plan Addendum. Most of our concerns have been addressed in the Response To Comments without significant changes to the Summary Report, however, the Army Environmental Center' s (AEC) involvement and role in the Remedial Design (RD) activities still needs to be clarified. Specifically, AEC is overseeing the construction and testing of the extraction and injection wells. The Remedial Design Plans do not address the coordination between the CoE and AEC with respect to the RD. We expect that DDRW, Sharpe will provide the assurance that the RD work conducted by AEC will be transmitted to and incorporated by the CoE. Overall , the reports in this submittal contain the basic elements needed to proceed with the 60 percent design phase. My comments on the 30 percent, and draft plan submittals referenced above, are listed below.