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REMEDIAL ACTION REPORT <br /> TRACY PUMP STATION <br /> 1. INTRODUCTION <br /> ' SAIC Energy, Environment& Infrastructure, LLC (SAIL)prepared this report at the request of <br /> Chevron Environmental Management Company(CEMC)regarding site remediation at the <br /> former Tracy Pump Station (the Site; Figure 1). The former crude-oil pump station from <br /> ' Chevron's Historical Pipeline Portfolio—Bakersfield to Richmond(HPP-BTR)existed on the <br /> Site, and past site characterizations documented high concentrations of polynuclear aromatic <br /> hydrocarbons (PAH) from the area of a former blow-off pond at the Site. The soil containing <br /> high PAHs represented an elevated human health risk at the Site. CEMC excavated and removed <br /> soil containing high PAHs from the area of the former blow-off pond to reduce human health <br /> hazards and risks to acceptable levels and aid in obtaining No Further Action Required(NEAR) <br /> status with the Central Valley Regional Water Quality Control Board(RWQCB). Site <br /> remediation was performed in accordance with SAIC's Remedial Action Plan(RAP; SAIC, <br /> 2011) for the Site, which was accepted by the Central Valley RWQCB on July 21, 2011 <br /> ' (RWQCB, 2011; Appendix A). The soil containing high concentrations of PAHs was <br /> successfully removed within the excavation boundaries. <br /> 2. BACKGROUND <br /> 2.1 LOCATION AND SITE DESCRIPTION <br /> The Site is located on a triangular-shaped parcel bounded by Byron Road to the north-northeast <br /> and Grant Line Road to the south(Figure 1). The Site is approximately 35 feet above mean sea <br /> level and has relatively flat topography. Current property use is a mix of agricultural and light- <br /> industrial business. The Union Pacific Railroad(UPRR) is located north-northeast of the Site, <br /> across and parallel to Byron Road. <br /> 2.2 HISTORICAL AND EXISTING PIPELINE FACILITIES <br /> The Site was a booster/heater station for the former Old Valley Pipeline (OVP) system. <br /> Aboveground storage tanks (ASTs),pumps,heaters, and boilers were removed from the Site; <br /> however, buildings that housed the mechanical equipment are still on site and in use. The Site <br /> Iincludes rights of way (ROWs)associated with the former OVP and the former Tidewater <br /> Associated Oil Company(TAOC)pipelines. The OVP was installed between 1902 and 1904 as <br /> a"hot line"(i.e., the oil was heated to facilitate transmission) and carried San Joaquin Valley <br /> ' crude oil north from the Kern River Oil Fields(in and near Bakersfield) to the Richmond <br /> Refinery. The pipeline and associated pump stations operated from 1903 until the early to mid <br /> 1930s. The OVP was again used during the early 1940s to primarily transmit Bunker C fuel oil <br /> from the Richmond Refinery to railroad hubs in Tracy. The pipeline northwest of Tracy may <br /> have also been used to transport crude oil to various markets in the Bay Area until the late 1960s; <br /> the OVP was reportedly abandoned in 1970. Where the pipeline was not abandoned in place, it <br /> was removed and the trenches were likely backfilled with native soil. The OVP ROW at the Site <br /> is aligned with the south side of West Byron Road(Figure 2). <br /> ' The former TAOC ROW lay within the UPRR ROW. The TAOC system was constructed in <br /> 1907 and transmitted heated crude oil from the southern San Joaquin Valley to the Bay Area. <br /> The pipelines reportedly transmitted a cutter stock with the crude oil between Coalinga and the <br /> SAIC <br />