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California Re _onal Water Quality Cont Board <br /> F N <br /> • Central Valley Region <br /> Katherine Hart Chair <br /> o � <br /> 1685 E Street, Fresno, California 93706 <br /> Linda S.Adams (559)445-5116 - FAX(559)445-5910 Edmund G.Brown Jr. <br /> Acting Secretary for http://www.waterboards.ca.gov/centraIvaIley Governor <br /> Environmental Protection <br /> 2 June 2011 <br /> Michael N. Oliphant <br /> Chevron Environmental Management Company <br /> 6001 Bollinger Canyon Road <br /> P. 0. Box 6012 <br /> San Ramon, CA 94583 <br /> REVIEW - NO FURTHER ACTION REQUIRED REQUEST, FORMER VERNALIS PUMP <br /> STATION, VERNALIS, SAN JOAQUIN AND STANISLAUS COUNTIES, CA <br /> Chevron Environmental Management Company (Chevron) submitted a No Further Action <br /> Required Request (NFAR) Report, TAOC (Tidewater Associated Oil Company) Former <br /> Vernalis Pump Station, at 35500 Welty Road, Vernalis, San Joaquin and Stanislaus Counties <br /> (Site). The Report, dated 30 March 2011 , was prepared for Chevron by Science Applications <br /> International Corporation — Benham Companies, LLC (SAIC). <br /> Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff has <br /> reviewed the NFAR Report and related 2002 — 2009 soil and groundwater investigation reports <br /> and a 2010 human health risk evaluation prepared for Chevron by SAIC. Detailed comments, <br /> provided in the enclosed memorandum, are summarized below. <br /> SAIC concluded that no remedial action is necessary to protect human or ecological health <br /> and a risk management decision for no further action could be made and that the Site is a <br /> candidate for closure. Based on the investigative findings of SAIC's HHSE and the earlier <br /> reports, Central Valley Water Board staff concur that the presence of the residual crude oil <br /> remaining at the Site does not pose an unacceptable risk to potential future onsite resident <br /> under the conditions evaluated. <br /> Consistent with other OVP/TAOC sites, Chevron needs to submit a site-specific Soil and <br /> Groundwater Management Plan (SGMP), designating Chevron as the responsible party. The <br /> SGMP, which documents onsite conditions, will serve as a guideline for Chevron to implement <br /> for the handling, reuse, and disposal of any soil and/or groundwater affected by the degraded <br /> crude oil and/or groundwater that may be encountered or excavated during future Site <br /> activities. The SGMP should be provided to San Joaquin and Stanislaus Counties Health <br /> Services staff and to owners of property that overlie areas of crude oil affected soil and/or <br /> groundwater at the Site. <br /> California Environmental Protection Agency <br /> �aRecycled Paper <br />