SWMN Farmers Co-op - Executive Summary |
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Risk Management Plan (RMP) - Propane Executive Summary SWMN Farmers Co-op Magnolia, Minnesota 1. Accidental Release Prevention and Emergency Response Policies We at SWMN Farmers Co-op in Magnolia are strongly committed to employee, public, and environmental safety. This commitment is an inherent part of our comprehensive accidental release prevention program that covers areas such as design, installation, operating procedures, maintenance, and employee training associated with the processes at our facility. It is our policy to implement appropriate controls to prevent possible releases of regulated substances. If such a release does occur, our trained emergency response personnel are at hand to control and mitigate the effects of the release. We also coordinate our response efforts with the Magnolia Fi re Department, which provides additional emergency response expertise. 2. Stationary Source and Regulated Substances Handled Our facility's primary activities include support services for crop production. We have propane stored in a 18,000-gallon tank located at our facility in Magnolia (Figure 1). The maximum amount stored is 15,300 gallons (64,612 pounds) at the maximum fill capacity of 85%. 3. Worst Case Release and Alternative Release Scenarios We utilized RMP PRO for the worst case and alternate case scenarios of the required offsite consequence analysis for our facility. The following details these scenarios. The worst case release scenario involves a catastrophic release of the entire contents of the propane storage tank (64,612 pounds) in gaseous form over a 10-minute period. At Class F atmospheric stability and 1.5 m/s wind speed, the maximum distance to an endpoint of 1 psi overpressure is 0.32 miles (Figure 2). This amount of overpressure can cause partial demol ition of houses and can result in serious injury to people within this distance. The estimated population within a 0.32-mile radius of this facility is 200. The alternative release scenario involves a 30-minute release of propane from a product line that contacts an ignition source and detonates, resulting in a vapor cloud explosion. Under neutral weather conditions, the maximum distance to an endpoint of 1 psi overpressure is 0.13 mile (Figure 3). The estimated population within a 0.13-mile radius of this facility is 50. 4. General Accidental Release Prevention Program Our facility has taken all the necessary steps to comply with the EPA's accidental release prevention requirements as set forth in 40 CFR part 68. The following sections briefly describe the elements of the release prevention program that is in place at our stationary source. Process Safety Information SWMN Farmers Co-op maintains a detailed record of safety information that describes the chemical hazards, o perating parameters, and equipment designs associated with all processes (Appendix D). Process Hazard Analysis Our facility conducts comprehensive studies to ensure that hazards associated with our processes are identified and controlled effectively. Any findings from the hazard analysis are addressed in a timely manner. Operating Procedures SWMN Farmers Co-op maintains written operating procedures to ensure that activities within our covered processes are conducted safely. These procedures address various modes of operation; the information is regularly reviewed and is readily accessible to operators involved in the processes (Appendix B). Training SWMN Farmers Co-op has a comprehensive training program in place to ensure that employees who are operating processes are competent in the operating procedures associated with these processes. Mechanical Integrity SWMN Farmers Co-op conducts documented maintenance checks on process equipment to ensure proper operation. Maintenance ch ecks are performed by qualified personnel with previous training in maintenance practices. Examples of process equipment that would receive maintenance checks include: pressure vessels, storage tanks, piping systems, relief and vent systems, emergency shutdown systems, controls, and pumps. Any equipment deficiencies identified by the maintenance checks are corrected in a safe and timely manner (Appendix C). Management of Change Written procedures are in place at SWMN Farmers Co-op to manage changes in process chemicals, technology, equipment, and procedures. Process operators, maintenance personnel or other employees whose job tasks are affected by a modification in process conditions are promptly notified of the modification and offered training to deal with it. Pre-startup Reviews SWMN Farmers Co-op routinely conducts pre-startup safety reviews related to new processes and modifications in established processes. These reviews are conducted to confirm that construction, equipme nt, and operating and maintenance procedures are suitable for safe startup prior to placing equipment into operation. Compliance Audits SWMN Farmers Co-op conducts compliance audits on a regular basis to determine whether the provisions of the plan, as set out under 40 CFR part 68, are being implemented. Any non- compliance issue discovered during the audit is promptly corrected. Employee Participation SWMN Farmers Co-op truly believes that process safety management and accident prevention is a team effort. Company employees are strongly encouraged to express their views concerning accident prevention issues and to recommend improvements. In addition, our employees have access to all information created as part of the facility's implementation of the RMP particularly information resulting from process hazard analyses. 5. Five-year Accident History SWMN Farmers Co-op has had an excellent record of preventing accidental releases over the last 5 years. Due to our stringent releas e prevention policies, no accidental release has occurred during this period. 6. Emergency Response Plan SWMN Farmers Co-op maintains a written emergency response plan to deal with accidental releases of hazardous materials. The plan addresses all aspects of emergency response including first aid and medical treatment, evacuations, and notification of local emergency response agencies and the public (Appendix A). |