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Ms. Betty Ho <br />San Joaquin County <br />1868 E. Hazelton Ave <br />Stockton, California S <br />Subject: <br />Lime Powder Spill Ri <br />Union Pacific Railroad <br />Stockton, CA — Septer <br />Dear Ms. Ho: <br />Arcadis U.S., Inc. (Arc <br />Letter on behalf of Uni <br />Joaquin County Envirc <br />summarizes response <br />a hopper car at the OF <br />Stockton, California (Ir- <br />SITE <br />I <br />SITE DESCRIPT <br />The Stockton Yard is <br />approximately 24 acr <br />commercial/industrial <br />BACKGROUND <br />Design & Consultancy <br />for natural and <br />fit assets <br />DEC 211 2017 <br />ENVIRONMENTAL HEALTH <br />DEPARTMENT <br />ivironmental Health Department <br />ue <br />ponse Summary Letter <br />ber 29, 2017 Lime Spill Response <br />dis) has prepared this Lime Spill Response Summary <br />n Pacific Railroad (UPRR) for submittal to the San <br />(mental Health Department (SJCEHD). This letter <br />Ictivities associated with lime powder spilled from beneath <br />ZR Stockton Rail Yard, located at 833 Eight Street, <br />)ckton Yard; Figure 1). <br />active rail yard owned by UPRR that occupies <br />of relatively flat terrain designated for <br />id use. <br />According to UPRR, lia powder spilled from a slightly open gate beneath a <br />hopper car as it moved long tracks during normal railcar staging operations. The <br />lime powder spill occur d to the south and west of the Car Department/One <br />Spot Facility at the Sto kton Yard. The lime spill area (Site) is shown on Figure 2 <br />and smaller scale spill rea details are shown on Figures 3 and 4. <br />Car number GACX001�51 was identified as the source of the lime. UPRR <br />personnel closed the hipper car gate that was slightly open during the response. <br />UPRR staff contacted t <br />September 29, 2017, a <br />SJCEHD. The SJCEHD <br />eir Response Management Communication Center on <br />d notified local and state regulatory agencies, including <br />responded to the notification by visiting the Site and <br />Arcadis U.S., Inc. <br />10205 Westheimer Road <br />Suite 800 <br />Houston <br />Texas 77042 <br />Tel 713 953 4800 <br />Fax 713 977 4620 <br />www.arcadis.com <br />ENVIRONMENT <br />Date: <br />December 20, 2017 <br />Contact: <br />Scott Hackman <br />Phone: <br />916.786.7369 <br />Email: <br />scott.hackman@arcadis.com <br />Our ref: <br />UPRESP18.0000 <br />Page: <br />2017.12.20_Stockton Sept 2017 Lime S ill_Summary Ltr.docx 1/3 <br />