Agland Co-op, Winthrop Location - Executive Summary
Risk Management Plan (RMP) - Propane |
1. Accidental Release Prevention and Emergency Response Policies
We at Agland Co-op in Winthrop 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 Winthrop Fire Depart
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 30,000-gallon tank located at our facility in Winthrop (Figure 1). The maximum amount
stored is 24,000 gallons (101,352 pounds) at the maximum fill capacity of 80%.
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 (101,352 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 0.38
miles (Figure 2). This amount of overpressure can cause partial demolition o
f houses and can result
in serious injury to people within this distance. The estimated population within a 0.38-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
Agland Co-op maintains a detailed record of safety information that describes the chemical hazards,
arameters, 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
Agland 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
Agland 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.
Agland Co-op conducts documented maintenance checks on process equipment to ensure proper
operation. Maintenance checks are performed by qualif
ied 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 Agland 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.
Agland 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,
equipment, and operating and maintenance proced
ures are suitable for safe startup prior to placing
equipment into operation.
Agland 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.
Agland 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
Agland Co-op has had an excellent record of preventing accidental releases over the last 5 years.
Due to our stringent release prevention policies, no accidental release has occurred d
6. Emergency Response Plan
Agland 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