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California Regional Water Quality Control Board <br /> a , Central Valley Region . <br /> Katherine Hart, Chair r `o <br /> Arnold <br /> Linda S. Adams 1685 E Street,Fresno, California 93706 Schwarzenegger <br /> Secretary for (559)445-5116• Fax(559)445-5910 Governor <br /> Environmental http'./iwww,waterboards.ca.gov/centralvalley <br /> Protection <br /> FACT SHEET <br /> PROPOSED NO FURTHER ACTION REQUIRED, HISTORICAL OVP AND TAOC CRUDE <br /> OIL PIPELINES, BANTA ROAD-UPRR PROJECT, TRACY, SAN JOAQUIN COUNTY, CA <br /> This Fact Sheet is to inform interested parties of consideration by the Central Valley Regional <br /> Water Quality Control Board (Central Valley Water Board) of a No Further Action Required for <br /> the subject site and to request any comments on the proposed action. The historical Old <br /> Valley Pipeline (OVP) and Tidewater Associated Oil Company (TAOC) pipelines are within a <br /> utility corridor less than 100-feet southwest of the site. The Union Pacific Railroad (UPRR) <br /> tracks are adjacent to the northwest side of the utility corridor. The site is within the South <br /> Banta Road easement, approximately 2.5 miles southeast of Tracy (see enclosed Figure 2). <br /> In 2003, petroleum hydrocarbon affected soil was observed during a horizontal jack-and-bore <br /> excavation for the installation of a water pipeline beneath South Banta Road. The boring was <br /> drilled under the road, the UPRR tracks, and the historical crude oil pipelines which ran along <br /> the southwest side of the tracks and former pipeline alignment. <br /> Between 2003 and 2009, with oversight of Central Valley Water Board staff, site investigations <br /> were completed and soil and groundwater samples collected for analysis by a certified <br /> laboratory. The samples were submitted for analysis of total petroleum hydrocarbons (TPH) <br /> compounds and benzene, toluene, ethylbenzene, and xylenes (BTEX), and polynuclear <br /> aromatic hydrocarbons (PAHs). <br /> The analytical results for soil were non-detect (ND) with two exceptions which exceeded <br /> environmental screening levels for potential future onsite residents. TPH as crude oil (TPHc) <br /> at a concentration of 2,400 milligrams per kilogram (mg/kg) and ethylbenzene at a <br /> concentration of 0.082 mg/kg exceeded the residential screening levels of 370 and 0.0019 <br /> mg/kg, respectively. However, these values do not exceed applicable environmental <br /> screening levels for potential construction/trench maintenance workers, which is the <br /> anticipated future onsite environmental risk exposure scenario. <br /> Findings provided in the reports indicate the extent of crude oil in soil is approximately 8 feet <br /> by 16 feet and 15 feet deep, limited in extent generally beneath and within the South Banta <br /> Road right-of-way easement. <br /> Groundwater samples borings were analyzed for TPH as diesel (TPHd), BTEX, PAHs and <br /> general minerals analysis for water quality evaluation. The only petroleum phgydrocarbon <br /> analyte detected was TPHd at a concentration of 55 micrograms per liter /L). This value is <br /> below the screening level of 100 pg/L considered protective of human health. The TPHd <br /> concentration reported is less than 100 pg/L, which is the taste and odor water quality <br /> objective for TPHd. <br /> California Environmental Protection Agency <br /> 2rJRecycled Paper <br />