Bath Facility, Station #19 - Executive Summary |
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EXECUTIVE SUMMARY The following executive summary was prepared in accordance with 68.155 by the owner/operator of the South Dakota Wheat Growers Association - Bath, SD facility (Station #19). (a) The accidental release prevention and emergency response policies at the stationary source The South Dakota Wheat Growers Association, management and employees of the Bath SD facility have implemented a variety of standard operating procedures, safe work practices, training programs and maintenance procedures designed to protect people, the environment and property. The facility complies with National Fire Protection Association (NFPA) -58 requirements for Liquid Propane Gas Storage and Handling, Occupational Safety and Health Administration (OSHA) 29 CFR 1910.111 Storage and Handling of Anhydrous Ammonia and it is our policy to adhere to all applicable federal, state and local laws. In the event of an emergency accidental release it is the policy of the management of the Bath, SD facilit y to notify the City of Aberdeen Fire Department and request that they respond to the emergency situation. (b) The stationary source and regulated substances handled The South Dakota Wheat Growers Association Bath, SD Facility stores and handles a variety of products and commodities associated with the production of crops. Anhydrous ammonia and liquefied propane gas are two (2) products regulated by Part 68 of the CAA and are in use at this facility above regulated quantities. Anhydrous ammonia, for retail sales, is stored in four (4) above ground storage tanks (AST) on concrete cradles. Two (2) ASTs are 30,000 gallons in capacity (total H20) and two (2) are 18,000 gallons capacity. Incoming product arrives by semi-bulk truck and rail tank car. The facility also has seven (7) rail cars of 80 ton capacity each and sixty (60) nurse trailers {15-1,450 gallons and 45-1000 gallons} The maximum inventory, based on 85% of total H20 capacity, is 2,000,000 pounds. Liquefied propane gas, for retail sales, is stored in four (4) ASTs on concrete cradles with capacities (total H20) of 30,000 gallons (2 ASTs) and 18,000 gallons (2 ASTs). Propane arrives by rail and semi-bulk truck and leaves by semi-bulk truck. The maximum inventory is 840,000 pounds. (c) The worst-case release scenario(s) and the alternative release scenario(s), including administrative controls and mitigation measures to limit the distances for each reported scenario Anhydrous Ammonia: Worst case scenario: The anhydrous ammonia worst case scenario is the failure of the largest vessel when filled to the greatest amount allowed (160,000 pounds), resulting in a toxic gas release. According to Environmental Protection Agency Offsite Consequence Analysis documentation, the distance to the endpoint is 7.30 miles. The estimated residential population within this distance is 28,000 and public receptors include schools, residences, hospitals, prisons/correction facilities, recreation, major commercial, of fice, or industrial, and agricultural production areas. Anhydrous Ammonia: Alternative case scenario: The anhydrous ammonia alternative case scenario which reached an endpoint off site is the failure of a vessel {nurse tank} when filled to the greatest amount allowed (6,400 pounds), resulting in a toxic gas release. EXAMPLE: Tornado or collision shears valve(s) from nurse tank and mitigation devices fail resulting in loss of total vessel capacity. According to Environmental Protection Agency Offsite Consequence Analysis documentation, the distance to the endpoint is 0.50 miles. The estimated residential population within this distance is 175 and public receptors include major commercial, office, or industrial, and agricultural production areas. Liquefied Propane Gas: Worst case scenario: The liquefied propane gas worst case scenario is the failure of the largest vessel when filled to the greatest amount allowed (110,000 pounds), resulting in a vapor cloud explosion. According to Environmental Protection Agency Offsite Consequence Analysis documentation, the distance to the endpoint is 0.40 miles. The estimated residential population within this distance is 175 and public receptors include major commercial, office, or industrial, recreation and agricultural production areas. Liquefied Propane Gas: Alternative case scenario: The liquefied propane gas alternative case scenario which reached an endpoint off site is the failure of a vessel {bulk truck} when filled to the greatest amount allowed (7,400 pounds), resulting in a vapor cloud explosion. EXAMPLE: Tornado or collision shears valve(s) from bulk truck tank and mitigation devices fail resulting in loss of total vessel capacity. According to Environmental Protection Agency Offsite Consequence Analysis documentation, the distance to the endpoint is 0.20 miles. The estimated residential population within this distance is 100 and public receptors include agricultural production areas. (d) The general accidental release prevention program and chemical-specific prevention steps The South Dakota Wheat Growers Association Bath, SD Facility's anhydrous ammonia accidental release prevention program complies with the Environmental Protection Agency accident prevention rule and all applicable state and local codes and regulations. The anhydrous ammonia system is designed, installed and maintained in accordance with Occupational Safety and Health Administration (OSHA) 29 CFR 1910.111 Storage and Handling of Anhydrous Ammonia, , American Society of Testing Materials (ASTM), American National Standards Institute (ANSI) and American Society of Mechanical Engineers (ASME) standards and regulations. The facility's liquefied propane gas accidental release prevention program complies with the Environmental Protection Agency accident prevention rule and all applicable state and local codes and regulations. The propane system is designed, installed and maintained in accordance with National Fire Protection Association (NFPA) 58 Liquid Propane Gas Storage and Handling, ASTM, ANSI and ASME standards and regulations. (e) The five-year accident history The South Dakota Wheat Growers Association Bath, SD Facility has never had an accident involving anhydrous ammonia and/or liquefied propane gas that caused deaths, injuries, property or environmental damage, evacuations or sheltering in place. (f) The emergency response program The South Dakota Wheat Growers Association Bath, SD Facility emergency response program complies with OSHA 1910.38. In the event of an emergency involving the anhydrous ammonia and/or propane system(s), it is policy to notify the City of Aberdeen Fire Department and request that they respond to the emergency. The management of this facility has discussed this policy with the fire department and members of the fire department are aware of our anhydrous ammonia and liquefied propane gas systems. In addition, it is policy to contact Mike Thompson, LEPC C hairman: 111 2nd Ave. SE Aberdeen, SD 57401 and Jesse Luce, Brown Co. Emergency Manager, (605) 626-7122, PO Box 1358, Aberdeen, SD 57407-1358. (g) Planned changes to improve safety As of 1/14/99 no changes to improve safety are planned. However, the management and employees of the South Dakota Wheat Growers Association Bath, SD Facility periodically review procedures, policies and safety program elements to evaluate improvements. |