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k" KLEINFELDER <br /> I ,:I jS�nJIC�S <br /> November 4, 1987 <br /> File: 24-2027-5 <br /> Dave Brent <br /> California Regional Water <br /> Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827-3098 <br /> SUBJECT: Interim Site Characterization Report (ISCR) and <br /> Final Remediation Work Plan (FRWP), Unocal Site at <br /> Pacific Avenue and Robinhood Drive, Stockton, <br /> San Joaquin County. <br /> Dear Dave: <br /> A meeting was held at the Regional Board on 29 October 1987 for the <br /> purpose of discussing and resolving technical issues related to the ISCR <br /> and the FRWP for the above mentioned site. The ISCR was submitted on 29 <br /> July 1987 and the FRWP was submitted on 07 October 1987 for Regional Board <br /> review. Present at this meeting were Dave Brent, RWQCB; Gary Reents, <br /> RWQCB; Dan Goalwin, Unocal Corporation; Mike Cyrocki, Kleinfelder; and <br /> Kent Zenobia, Kleinfelder. The Agenda of the meeting was focused on the <br /> following issues: <br /> • Vapor extraction system <br /> • Vertical extent of ground water contamination <br /> • Offsite ground water contamination <br /> • Ground water remediation <br /> A description of discussions at this 29 October 1987 meeting and the <br /> future direction of the project follows. <br /> VAPOR EXTRACTION SYSTEM <br /> The proposed soil vapor extraction system as described in the FRWP appears <br /> to be located properly to treat the contaminated vadose zone soil. <br /> Concurrence was reached to move forward with the final design and <br /> implementation of the vapor extraction system (VES). Kent Zenobia <br /> indicated that the VES wells could be located under the proposed building, <br /> since access to the wells is not necessary. Plates 1 and 2 show in a flow <br /> diagram format the steps necessary to proceed from VES final design <br /> through ground breaking of the proposed building. Well permits for these <br /> seven vadose zone wells will b. obtained from the San Joaquin County <br /> Health District prior to drilling. (Applications attached to the SJLHD <br /> correspondence) . <br /> KLEINFELDER 9795 Business Park Drive, Suite C, Sacramento, CA 95827 (916) 366-1701 <br />