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Emergency Response Action Plan Version :27.10.4 Storage Tank Overfill or Failure • Shut down all tank farm product movement operations and isolate the tank. . Initiate Confined Space Entry procedures, as applicable. . Ensure that the containment area drainage valve(s) is "closed". • If possible, block drainage of spilled material from traveling offsite. . If near tank bottom, consider filling tank with water and maintain water bottom to suspend the discharge. • Determine the direction and expected duration of spill movement. Refer to the maps in Section 6.0. • If the spill escapes the containment area, review the location of socio-economic and environmentally sensitive areas identified in Section 6.0 and the ACP. Determine which of these may be threatened by the spill and direct the response to these locations. Initiate protection and recovery actions. . Qualified personnel should utilize Combustible Gas Indicator, 02 meter, proper colormetric indicator and/or other air sampling measurements to assure that areas are safe to enter for continued response operations. • Stop all traffic in hazardous area (inside and outside of property boundaries), as the situation demands. • Inform local operators such as utilities, telephone company, railway. . Remove product from containment area (at a sump or in a low area) with an intrinsically safe pump, oil skimmer, and/or vacuum truck w/skimmer attachments. • If applicable, process remaining product through the separator system. . Clean up product spill to eliminate any possible environmental problems. Be alert for underground cables. . Stockpile waste for eventual disposal. . Make all necessary repairs. Return the tank to service when repairs are complete and tested. • Complete follow-up and written reporting, as the situation demands. Vapor Cloud (from spill, line rupture, etc.) . The person who discovers the vapor cloud will sound the alarm and notify the supervisor on duty and vacate the area. • Remember: the only proper action in the presence of a vapor cloud is to get away from it. Do not shut off electrical equipment. . All personnel will report to the evacuation muster point for roll call and further instructions. . After all personnel have been accounted for, the Facility Management, the Facility Supervisor or a Facility Operator will initiate the following actions as deemed necessary: Shut down pipeline. Only the fire department will be permitted to enter the Facility. . Contact the appropriate agencies and potentially affected neighbors (refer to Figure 2.5). Shell Supply and Distribution ERAP-36 Stockton Terminal FRP ©2019 Witt O' Brien's Revision Date:October, 2019