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2. A stakeholder of a plant is considering the installation of a new railcar tank unloading facility. The facility will unload nominal 25,000-gal tank cars

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2. A stakeholder of a plant is considering the installation of a new railcar tank unloading facility. The facility will unload nominal 25,000-gal tank cars containing 1,3-butadiene and cyclohexane. The unloading system will be equipped with an emergency shutdown system with remotely operated block valves. The unloading operation will be done by computer control. The railcars are inerted with nitrogen to a pressure of 40psig, and the railcar relief system has a set pressure of 75 psig. The unloading operating instructions are written and have been reviewed by the corporate technical staff. A reactive chemicals review has already been completed on the proposed facility. Combustible gas detectors will be located at the unloading station. A deluge system will be installed at the unloading site with an excellent water supply. A diking system will surround three sides of the facility, with any spills directed to a covered impounding area (Please refer to Table 1). KKKS6233 Table 1 Data for the 1,3-butadiene and cyclohexane (a) What material is required to consider in the DOW F\&EI? Give your reason. (5 marks) (b) By using DOW F\&EI form, determine the DOW F\&EI (40 marks) (c) Determine the minimum spacing from adjacent units

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