SITE INFORMATION AND CORRESPONDENCE_FILE 1

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" STATE OF CALIFORNIA-Environmental Protect. WIL SON;Governor CENTRAL VALLEY REGION CNVIRONMEN AI H �`��- 3443 Routier Road, Suite A �- Sacramento, CA 95827-098 ¢ }� FAX:N91)9255-3015 5� 94 JUL 18 PH 53 12 July 1994 I Environmental Specialist Chevron Pipeline Company 5080 California Ave., Suite 400 Bakersfield, CA 93309-1671 GROUNDWATER MONITORING PROPOSAL, CHEVRON PIPELINE COMPANY, DIVIDEND PROPERTY, TRACY, SAN JOAQUIN COUNTY ,I We have reviewed the 21 June 1994 ground water monitoring plan for the Dividend Property, prepared by your consultant, Geomatrix Consultants. The plan includes inspection of existing wells for integrity, measurement of ground water levels and free product thickness, ground water sampling and analysis, and quarterly reporting of results. As discussed in our 20 April 1994 meeting, the information obtained will be used to evaluate the need for additional remedial investigation and cleanup at the site. We hereby approve the monitoring plan on the condition that analysis of total _. extractable hydrocarbons_further specifies the types of each hydrocarbon detected, such as gasoline, diesel, kerosene, etc. In add>.ffon, when the well-De amination and first quarter monitoring results are submitted, they should be accompanied with a proposal for the installation of additional monitoring wells to define the lateral and vertical extent of contamination at the site. In your letter of 21 June 1994, you stated that you will be sending the work plan for soil sampling and health risk assessment to the San Joaquin County Health Department. Since the Board is lead agency for the site and evaluation of the results of soil sampling is part of the overall remedial investigation at the site, the work plan should be submitted to us with a copy to San Joaquin County. The health risk assessment will have to be reviewed by the Department of Toxic Substances Control. i