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California -,gional Water Quality Cot A Board .. <br /> Central Valley Region <br /> Karl E. Longley,SCD, P.E.,Chair �e-Y' <br /> Linda S.Adams Arnold <br /> Secretaryfor 1685E Street,Fresno,Cal(559)445 5910 Schwarzenegger <br /> Environmental (559)445-5116•Fax(559)445-5910 Governor <br /> Protection http://ww,",.waterboards,ca.gov/centralvalley <br /> TO: Shelton R. Gray FROM: C. Dean Hubbard <br /> Senior Engineering Geologist Engin fering Geologist <br /> SATE: 17 December 2008 SIGNATURE: — <br /> SUBJECT: REVIEW— SOIL AND GROUNDWATER INVESTIGATION REPORT, CATELLUS <br /> PROPERTY, TRACY, SAN JOAQUIN COUNTY <br /> Chevron Environmental Management Company (Chevron) submitted a Soil and Groundwater <br /> Investigation Report, dated 16 September 2008. The Catellus Property (Site) is along the <br /> former Old Valley Pipeline (OVP) right-of-way (ROW) easement adjacent to Byron Road, <br /> between West Grant Line Road and Van Sosten Road, immediately northwest of Tracy. I <br /> have reviewed the referenced report, prepared for Chevron by Science Applications <br /> International Corporation (SAIC), and my comments are provided below. A reference figure <br /> provided by SAIC is attached. <br /> Background <br /> The historical OVP and Tidewater Associated Oil Company (TAOC) pipelines transported <br /> crude oil between Kern County oil fields and refineries in the Richmond area until the 1960's. <br /> The pipelines were owned/operated by Chevron predecessors until removed from service in <br /> the late 1960s or early 1970s. The OVP is on the west side of the W. Byron Road easement <br /> and the former TAOC pipeline is along the east side of W. Byron Road within the adjacent <br /> Union Pacific Railroad (UPRR) ROW east of the highway. <br /> Reportedly, prior to abandonment one or both of the historical pipelines transported Bunker C <br /> fuel oil from the refineries to locomotive fueling centers in Tracy. In addition to the TAOC line, <br /> two active refined product pipelines, Bay Area Products Line and the Kinder Morgan Line, are <br /> within the ROW. <br /> In 2006, Site investigations were undertaken as part of Chevron's "forward-looking" <br /> environmental assessment of properties along the historical pipelines. In early 2006, crude oil <br /> affected soil and groundwater, later attributed to OVP/TAOC leaks, were identified during a <br /> utility trench excavation. In June 2006, SAIC implemented a workplan to evaluate Site <br /> conditions and the findings were provided in a 28 September 2006 report. Central Valley <br /> Regional Water Quality Control Board (Central Valley Water Board) staff reviewed the report <br /> in a 16 November 2006 response to Chevron, including approval for an additional investigation <br /> workplan. <br /> The adjacent areas are primarily agricultural land, local access roads, and some rural <br /> residences. Another Chevron OVP crude oil investigation site, the former Tracy Pump Station, <br /> is adjacent north of the Catellus Site. California Interstate Highway 205 is less than <br /> one-quarter mile to the southeast. <br /> California Environmental Protection Agency <br /> ca Recycled Paper <br />