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A [ _ <br /> p <br /> 100 Pine Street, 1 Oth Floor <br /> San Francisco, CA 94111 <br /> C415) 434-9400 • FAX (415) 434-1365n GEOMATRIX <br /> 9OFEr332o. P , I2- 143 <br /> 28 February 1996 <br /> Project C2677-J <br /> Ms. Wendy L. Cohen <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> Subject: Submittal of Items Requested by RWQCB in Support of Site Closure <br /> Dividend Property <br /> Tracy, California <br /> Dear Ms. Cohen: <br /> On behalf of Chevron Pipe Line Company (CPL) and Texaco Trading & Transportation, Inc. <br /> (TTTI), Geomatrix submits herewith the items requested in your letter to CPL dated 1 February <br /> 1996. These items are: (1) items identified in Appendix B of "Tri-Regional Board Staff <br /> Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites" that <br /> have not already been submitted to your office, and (2) boring logs for all site wells and a <br /> hydrogeologic cross-section parallel to the pipeline and extending from (former) MW-7 to MW- <br /> 15. <br /> Appendix B of Tri-Regional Recommendations• "Requests for Closure" <br /> Most of the material required in the closure report has been submitted previously to RWQCB. <br /> Each of the 11 requirements are addressed as follows: <br /> 1. Distance to production wells for municipal, domestic, agriculture, industry or other uses <br /> within 2000 feet of the site. <br /> Geomatrix performed a well search for the site vicinity using files of the Department of Water <br /> Resources (DWR) on 23 February 1996. We have summarized the information gathered on the <br /> attached figure and table. The locations of the wells were listed in DWR files to the 1/4 1/4 <br /> Section. The figure shows the site and the number of wells within each 1/4 1/4 Section that are <br /> within 2000 feet of the site. Available information about the wells is provided on the attached <br /> table; most of the wells identified are more than 250 feet from the site and are screened at depths <br /> of approximately 90 feet or deeper. <br /> Geomatrix Consultants, Inc. <br /> Engineers,Geologists,and Environmental Scientists <br />