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STATE OF CALIFORNIA-Environmental Proteq&Agency PETE WILSON, Governor <br /> CALIFJRNIA REGIONAL WATER QUAL-ITY CONTROL BOARD <br /> CENTRAL VALLEY REGION E{NIROVV ENTAL HEALTH <br /> 3443 Routier Road,Suite A <br /> Sacramento, CA 95827-3098 <br /> PHONE: (916) 255-3000 �3 ���� �� PH �. �^ <br /> DOD FAX: (916)255-3052 7 f `J <br /> 4 June 1993 <br /> Mr. Abel Haines <br /> Environmental Protection Office <br /> Bldg. S-108, Sharpe Site <br /> Defense Distribution Region West <br /> P. 0. Box 960001 <br /> Stockton, CA 95296-0710 <br /> DRAFT RECORD OF DECISION (ROD), OPERABLE UNIT NO. 1 (OU-1), DEFENSE DISTRIBUTION <br /> REGION WEST (DDRW), TRACY, SAN JOAQUIN COUNTY <br /> We have reviewed the Draft ROD for DDRW, Tracy submitted on 6 April 1993. Overall , <br /> the Draft ROD is well organized and written. However, we have several concerns with <br /> the ROD that will require revisions prior to our approval . Our primary concern is <br /> that the ROD clearly state that DDRW, Tracy has applied for waste discharge <br /> requirements (WDRs) which will regulate treatment and disposal of the groundwater. <br /> We plan to bring the WDRs to the Board for adoption prior to implementation of the <br /> OU-1 remedial action. In our review of the Draft ROD, we have listed the effluent <br /> limits that we intend to include in the WDRs for OU-1 . The effluent performance <br /> standards listed in the ROD should be consistent with the effluent limits to be <br /> established in the WDRs. <br /> Our other concerns with the Draft ROD involve the discussions and supporting <br /> graphics on the conceptual designs for the extraction and disposal systems for OU-1 . <br /> We are also concerned that the semi-annual ground water monitoring frequency <br /> proposed for the remedial action is too limited and must remain on a quarterly <br /> basis. We have a few specific comments on our Applicable or Relevant and <br /> Appropriate Requirements (ARARs) that should be included in the Final ROD. We have <br /> provided our comments in the enclosed memorandum. If DDRW, Tracy incorporates all <br /> of our comments as discussed in our memorandum, we should be able to approve and <br /> sign the ROD. <br /> If you have anyquer ions, please call me at (916) 255-3069 or Mr. James Taylor at <br /> (916) 255-3065. <br /> SIL C ILLA WILLIAMS <br /> ngineering Geologist <br /> CKW:cw <br /> Enclosure <br />