ARCHIVED REPORTS_REMEDIAL ACTION PLAN

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Mr.Michael Oliphant—CEMC Remedial Action Plan ' Former Tracy Pump Station June 23,2011 Page 2 of 4 Tidewater Associated Oil Company(TAOC)pipelines. The OVP was installed between 1902 and 1904 as a"hot line"(i.e., the oil was heated to facilitate transmission) and carried San Joaquin Valley crude oil north from the Kern River Oil Fields (in and near Bakersfield) to the Richmond Refinery. The pipeline and associated pump stations operated from 1903 until the early to mid 1930s. The OVP was again used during the early 1940s to primarily transmit Bunker C fuel oil from the Richmond Refinery to railroad hubs in Tracy. The pipeline northwest of Tracy may have also been used to transport crude oil to various markets in the Bay Area until the late 1960s; the OVP was ' reportedly abandoned in 1970. Where the pipeline was not abandoned in place, it was removed and the trenches likely backfilled with native soil. The OVP ROW at the Site is aligned with the south side of West Byron Road(Figure 2). The former TAOC ROW lay within the UPRR ROW. The TAOC system was constructed in 1907 and transmitted heated crude oil from the southern San Joaquin Valley to the Bay Area. The pipelines reportedly transmitted a cutter stock with the crude oil between Coalinga and the Bay Area; the cutter stock was used to reduce the viscosity of the oil. The TAOC pipelines were abandoned in the 1970s. ' Two active pipelines, the Kinder Morgan Energy Partners, L.P. (KMEP)pipeline and Chevron Pipe Line Company's Bay Area Products Line(BAPL), are also located within the UPRR ROW. The KMEP pipeline reportedly transports gasoline,jet fuel, and diesel. The BAPL reportedly transports gasoline and diesel. Several environmental investigations have been performed at the Site under the direction of, and to the satisfaction of, the Central Valley RWQCB. A summary of site- investigation activities and results are included as Attachment A. ' SCOPE OF WORK SAIC proposes to excavate PAH-affected soil at the northern portion of the Site where PAHs have been detected at high concentrations in the shallow soil associated with the ' former blow-off pond. The location of the proposed excavation is shown on Figure 3. SAIC determined the proposed excavation boundaries by advancing 29 soil borings and collecting shallow soil samples. Boring logs are included as Attachment B. A total of ' 49 soil samples were submitted to Calscience Environmental Laboratories, Inc. for analysis. The shallow soil sample analytical results are provided in Tables 1 and 2. Select shallow soil sample analytical results were used to delineate the lateral and vertical extents of the proposed excavation. Analytical results from the lateral and ' vertical confirmation soil samples are provided in Tables 3 and 4. Copies of the laboratory analytical reports are included as Attachment C, and a Data Usability Summary is included as Attachment D. ' PRELIMINARY ACTIVITIES ' CEMC will select a qualified excavation construction contractor after Central Valley RWQCB acceptance of this RAP. The subcontractor will be responsible for obtaining the required permits from San Joaquin County and other agencies, as appropriate. ' SAIC and the selected contractor will each prepare a site-specific Health and Safety Plan (HASP) in accordance with the requirements of 29 Code of Federal Regulation 1910.120. The HASPS will be provided to all field personnel and copies will be maintained at the Site during all field activities.