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SAIC <br /> HPP-BTR OVP MP#204.3 <br /> Ahem Road <br /> Reports <br /> Accession#06102.20130307.001 <br /> March 29, 2013 <br /> Mr. Mike Oliphant <br /> Environmental Project Manager <br /> Chevron Environmental Management Company <br /> P.O. Box 6012 <br /> San Ramon, California 94583 <br /> Subject: Soil and Groundwater Investigation Report <br /> Ahern Road—Vernalis <br /> Vernalis, San Joaquin County, California <br /> Dear Mr. Oliphant: <br /> SAIC Energy, Environment& Infrastructure, LLC (SAIC)prepared this Soil and <br /> Groundwater Investigation Report on behalf of Chevron Environmental Management <br /> Company(CEMC)for the Ahern Road—Vernalis site (the Site; Figure 1). SAIC <br /> performed this investigation in general accordance with the soil and groundwater <br /> investigation work plan and subsequent revised work plant, which was prepared to limit <br /> the overall extent of the investigation considering a foreseen absence of development <br /> surrounding the Site as outlined in the San Joaquin County General Plana. The work <br /> plans were approved by the Central Valley Regional Water Quality Control Board <br /> (RWQCB)4'5. Between February and December 2012, SAIC advanced nine soil borings <br /> to delineate the lateral and vertical extent of affected soil and groundwater at the Site. <br /> BACKGROUND AND SITE DESCRIPTION <br /> Standard Oil Company and Tidewater Associated Oil Company (TAOC)formerly <br /> operated pipelines within rights of way(ROWs)that ran parallel to Ahern Road <br /> (Highway 33). These ROWS contained the former Old Valley Pipeline (OVP)and the <br /> TAOC pipelines, collectively referred to as CEMC's Historical Pipeline Portfolio— <br /> Bakersfield to Richmond (HPP-BTR). The pipelines carried San Joaquin Valley crude <br /> oil (SJV crude oil)north from the southern San Joaquin Valley to refineries in the Bay <br /> 1. SAIC,2010. Soil and Groundwater Investigation Work Plan,Ahern Road-Vernalis, Vernalis,San Joaquin County, <br /> California. August 26. <br /> 2. SAIC,2011. Revised Soil and Groundwater Investigation Work Plan,Ahern Road-Vernalis, Vernalis,San Joaquin <br /> County,California. November 28. <br /> 3. San Joaquin County,2010. San Joaquin County General Plan. January. <br /> 4. Central Valley RWQCB,2010. Revised Soil and Groundwater Investigation Work Plan,Ahern Road-Vernalis, <br /> Vernalis,San Joaquin County, California. November 28. <br /> 5. Central Valley RWQCB,2011. Revised Soil and Groundwater Investigation Work Plan,Ahern Road-Vernalis, <br /> Vernalis,San Joaquin County, California. November 28. <br /> SAIC Energy,Environment&Infrastructure,LLC <br /> 1000 Broadway I Suite#675 1 Oakland, CA 946071 1 tel:(510)466-7100 1 fax: (510)446-7919 1 saic.com\eeandi <br />