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Kennedy/Jenks Consultants <br /> groundwater samples from the five areas of interest within OU-2, at the locations shown on <br /> Figure 4. The sampling program is detailed in Tables 1 and 2 and summarized by AOI below. <br /> • AOI 4— Ponds: Three soil borings, one in the vicinity of each former pond, are proposed <br /> to characterize this area. Soil samples will be collected from each boring at four depth <br /> intervals (0 to 0.5 feet, 2 to 3 feet, 5 to 6 feet, and 10 to 11 feet bgs). Since previous <br /> uses of the ponds are not documented, these samples will be analyzed for a range of <br /> potential constituents, including TPHd, TPHmo, VOCs, semivolatile organic compounds <br /> (SVOCs)and Title 22 total metals. Additionally, one soil sample from 0 to 0.5 feet bgs <br /> will be analyzed for creosote due to the presence of timber debris currently stockpile in <br /> this AOI. One boring has been chosen for collection of a groundwater sample. The <br /> groundwater sample will be analyzed for TPHd, TPHmo, and VOCs. <br /> • AOI 5— Oil Tank: Four soil borings will be advanced in this area to assess whether <br /> undocumented operations associated with oil storage and transmission infrastructure on <br /> the site, including the aboveground oil tank, oil pump house, oil collection drains and oil <br /> pipes, may have resulted in a release of petroleum hydrocarbons or other compounds. <br /> One boring will be located near each of the following features: <br /> ■ Grass swale <br /> ■ Oil collection drain at the end of the grass swale <br /> ■ Oil pipe and the oil tank <br /> • Oil tank and the oil pump house <br /> Soil samples will be collected at four depth intervals (0 to 0.5 feet, 2 to 3 feet, 5 to 6 feet, <br /> and 10 to 11 feet bgs), and analyzed for TPHd, TPHmo, VOCs and SVOCs. One boring <br /> has been chosen for collection of a groundwater sample. The groundwater sample will <br /> be analyzed for TPHd, TPHmo, and VOCs. <br /> • AOI 6 — Roundhouse: Five soil borings will be advanced to assess whether <br /> undocumented operations associated with former oil storage and transmission <br /> infrastructure (oil sump and former railroad-related maintenance facilities) or repair <br /> infrastructure (engine pit, turntable and two roundhouse structures) may have resulted in <br /> a release of organic compounds and metals. One boring will be located in each of the <br /> following areas: <br /> ■ Engine pit <br /> ■ Turntable <br /> ■ Oil sump <br /> ■ Roundhouse (2 borings) <br /> Soil samples will be collected at four depth intervals (0 to 0.5 feet, 2 to 3 feet, 5 to 6 feet, <br /> and 10 to 11 feet bgs), and analyzed for TPHd, TPHmo, VOCs, SVOCs, and <br /> Title 22 total metals. One boring has been chosen for collection of a groundwater <br /> sample. The groundwater sample will be analyzed for TPHd, TPHmo, and VOCs. <br /> Remedial Investigation Work Plan Page 9 <br /> Former Tracy Railyard, Tracy, California <br /> g'lis-WoupWrrinyob10510565777.03_upff%reportslwork plant i AnaNeuldoc <br />