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STATE OF CALIFORNIA -Environmental Proten Agency <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD PETE WILSON, Governor <br /> CENTRAL VALLEY REGION N"® <br /> 3443 Routier Road, Suite A ENVIPsGNMENTAL HEALTH <br /> Sacramento, CA 95827-3098 Ralr e <br /> PHONE: (916) 255-3000 OO I SERVICE <br /> 93 <br /> Ih 3 <br /> FAX: (916) 255-3015 � 73 AUG i I PM 12t 34 <br /> 6 August 1993 <br /> Mr. Roy Thun, Chair <br /> Stockton Terminals Technical Committee <br /> C/O ARCO Products Company <br /> P.O. Box 2570 <br /> Los Angeles, CA 90051-0570 <br /> WORK PLAN FOR PHASE II SITE ASSESSMENT WORK, STOCKTON TERMINALS <br /> TECHNICAL COMMITTEE, SAN JOAQUIN COUNTY <br /> We have reviewed EMCON Associcates' 12 July 1993 site assessment work plan for the fuel <br /> terminals of the Stockton Terminals Technical Committee at the Port of Stockton. My comments <br /> are presented below. <br /> 1. Contamination sources or source areas such as "hot spots" should be identified to the fullest <br /> extent possible because remediation would be protracted or futile if contamination sources <br /> still exist during remediation. <br /> 2. The effects of features such as manholes, hydrants, etc. on contaminant migration should be <br /> identified since they will affect remediation. <br /> 3. We believe there is enough information to submit an interim remedial action plan (TRAP) for <br /> remediation of the contamination in Zone A. The IRAP must comply with State Water <br /> Resources Control Board Resolution No. 92-49, evaluate remedial alternatives, recommend <br /> one or a combination of alternative actions, and justify the recommendation. <br /> 4. Recommendations for future work should be included in the report. <br /> August 1993. Based on EMCON's revised schedule presented in its 30 July 1993 letter, the <br /> We hereby approve the work plan conditioned on receiving a response to the above comments by 30 report on the Phase II site assessment work is due to the Board by 4 February 1994. In addifinal <br /> tion, <br /> please submit an IRA.P by 15 October 1993. <br />