SITE INFORMATION AND CORRESPONDENCE

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Lee Higgins - 3 - 5 August 2010 • Chevron Banta Road-UPRR According to the findings provided in Site characterization reports, I concur that the extent of impacted soil and groundwater is limited and has been adequately delineated. My review of the data indicate that use of the historical crude oil pipelines ceased over 30 years ago, residual petroleum hydrocarbons remaining are within the highway corridor and lie beneath the highway and the newly installed water pipeline. I concur with SAIC's summary provided in the No Further Action Required Request for Banta Road-UPRR, Tracy-Fresno Line Right-of-Way Report and that the property is a candidate for closure. Consistent with other OVP/TAOC sites, Chevron previously provided a site-specific Soil and Groundwater Management Plan (SGMP) dated 22 March 2010. The SGMP serves as a guideline for Chevron to implement for the handling, reuse, and disposal of any soil affected by the degraded crude oil that may be encountered or excavated during future Site activities. The SGMP outlines detailed procedures for future property owners, developers, and/or maintenance firms to follow addressing such topics as dewatering from excavations and health and safety guidelines. Contact telephone numbers for Chevron and San Joaquin County Environmental Health Department are included in the SGMP. The Central Valley Water Board is required to provide the public the opportunity to comment on closure decisions under state law (including Health and Safety Code 25356.1). Central Valley Water Board staff will be notifying the owner(s) of the Site and nearby landowners of closure cases we oversee. Pursuant to Section 2728 of the California Code of Regulations, Title 23, Division 3, Chapter 16, the Central Valley Water Board requests that you conduct a property and offsite property owner survey (Survey). The Survey should determine: a) all properties overlying soil and groundwater that have been impacted by the historical pipelines' release, and b) adjacent/nearby properties within a 200-foot radius of the impacted areas delineated at the Site. The Survey should include assessors' parcel maps for the properties. Upon completion, submit a table or spreadsheet listing property owner names and mailing addresses, business and residence mailing addresses, and assessors' parcel numbers. Include a map(s) showing the approximate outline of affected soil/groundwater and the properties potentially impacted. The results of the property owner(s) Survey needs to be submitted by 15 September 2010.