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D I S o_:La„s.consulruiy. <br /> �x^�y fornaturaland <br /> AR <br /> built assets <br /> Mr. Jason Gaitan Arcadis U.S.,Inc. <br /> San Joaquin County Environmental Health Department 101 Creekside Ridge Court <br /> Suite 200 <br /> 1868 East Hazelton Avenue <br /> Roseville <br /> Stockton, California 95205 California 95678 <br /> Tel 916 786 0320 <br /> Fax 916 786 0366 <br /> www.arcadis.com <br /> Subject: <br /> Soil Sample Summary and Excavation Work Plan ENVIRONMENT <br /> 1000 East Roth Road, French Camp, CA 95231 <br /> French Camp, ca—November 10, 2019 Locomotive Diesel Release <br /> Date: <br /> July 13,2020 <br /> Contact: <br /> Dear Mr. Gaitan: <br /> Julie Munn <br /> On behalf of Union Pacific Railroad (UPRR), Arcadis U.S., Inc. (Arcadis) has <br /> prepared this Soil Sample Summary and Excavation Work Plan (Work Plan) Phone: <br /> 916 865 3153 <br /> associated with the November 10, 2019 locomotive diesel release at the UPRR <br /> Lathrop Intermodal Facility located at 1000 East Roth Road in French Camp, Email: <br /> California (Site; Figures 1 and 2). Initial and follow-up response activities were Julie.D.Munn@arcadis.com <br /> conducted in November 2019 and February 2020 that included excavation, soil <br /> Our ref: <br /> boring, and soil sampling activities. A summary of response activities, analytical <br /> results, and proposed additional excavation are presented in this Work Plan. 30042857 <br /> BACKGROUND <br /> On November 10, 2019, diesel was released from a UPRR locomotive engine <br /> along track PX868-5-531. UPRR reported the release to the Response <br /> Management Communication Center(RMCC),which notified local and state <br /> regulatory agencies. UPRR, Patriot Environmental Services (Patriot), and <br /> Arcadis personnel responded to and performed response clean-up activities. San <br /> Joaquin County Environmental Health Department (SJCEHD) representatives <br /> were onsite during the response. <br /> In November 2019, initial response field activities included the excavation of <br /> approximately two cubic yards of diesel-impacted soil and ballast and collection <br /> of one in-place soil sample. Follow-up response field activities performed in <br /> February 2020 included the advancement of nine soil borings and collection of 17 <br /> additional soil samples. <br /> Page: <br /> 2020.07.13_Soil Sample Summary and Excavation Work Plan.docx 1/5 <br />