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B.Worst Case Discharge Analysis and Scenarios Version:27.10.4 <br /> EPA Worst Case Discharge <br /> The worst-case discharge volume for this site is 2,136,246 gallons of Group 1 oil, Gasoline. <br /> Description <br /> This size discharge would most likely occur due to a natural disaster or catastrophic event. <br /> Examples may include, but not be limited to: <br /> • Loading and Unloading of Surface Transportation; Facility Maintenance; <br /> . Facility Piping; <br /> • Pumping Station and Sumps; Oil Storage Locations; <br /> . Vehicle Refueling Operations; and/or <br /> . Age and Condition of Facility Components. <br /> The worst-case discharge would occur during a natural disaster: <br /> • Heavy rain, 88 degrees with gust up to 15 MPH. <br /> During a severe thunderstorm, tank 24 is struck by lightning, causing tank to shell to crack. <br /> Tank eventually ruptures, causing a tidal wave. Tidal wave breaches tank farm secondary <br /> containment. <br /> . The San Joaquin River is the nearest waterway, located northeast of the Facility. This is the <br /> nearest fish, wildlife and sensitive environment. <br /> . The Facility would contact the contracted OSRO to have boom deployed within one (1) hour. <br /> • Oil recovery devices will be provided by the contracted OSRO within two (2) hours. <br /> . The contracted OSRO will provide all necessary response equipment within the required Tier <br /> time limits. <br /> Protection of Groundwater <br /> The chances of groundwater impact due to a spill are minimal because the pathway between the <br /> Facility and the waterway is improved and/or impervious to a large extent. However, if a spill moved <br /> downward through the soil horizons and reached the groundwater table, then it would be necessary <br /> to contain and recover the product. <br /> Shell Supply and Distribution B-15 Stockton Terminal FRP <br /> ©2019 Witt O' Brien's Revision Date:October, 2019 <br />