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Kennedy/Jenks Consultants <br /> Section 1: Introduction and Background <br /> Kennedy/Jenks Consultants prepared this Soil Investigation Work Plan (Work Plan) on behalf of <br /> the BNSF Railway Company (BNSF) for the BNSF Mormon Yard in Stockton, California (Site), <br /> which is shown on Figure 1. The objective of the soil investigation is to assess whether residual <br /> diesel is present at the Site associated with a prior spill. <br /> In October 2011, a locomotive experienced an unauthorized release of approximately <br /> 1,400 gallons of diesel at the Site. A BNSF contractor responded to the spill. The spill response <br /> involved stopping the leak, removing the impacted railroad track, excavating the impacted soil, <br /> taking confirmation samples, backfilling, and repositioning the track. After the track had been <br /> repositioned, the results of the confirmation samples were received. The maximum detected <br /> concentration of total petroleum hydrocarbons as diesel (TPHd) in the confirmation samples <br /> was 9,000 milligrams per kilogram (mg/kg). <br /> The San Joaquin County Environmental Health Department (SJCEHD) contacted BNSF in May <br /> 2013 regarding the confirmation sample results. In 2015, SJCEHD requested the Central Valley <br /> Regional Water Quality Control Board (RWQCB) provide oversight for the soil investigation. <br /> This Work Plan was prepared based on a call with the RWQCB on 18 February 2015. <br /> Soil Investigation Work Plan, Page 1 <br /> BNSF Mormon Yard, Stockton, California <br /> g:4sgaiqatlminyob1f3113&'A20.�bnsPA9+apal¢IsoilJnva3-xaMyWlm#tloc <br />