Farmers Union Oil Company, Mahnomen - Executive Summary

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        Executive Summary - Farmers Union Oil Company 
                      Mahnomen (Ammonia) 
 1. Accidental Release Prevention and Emergency Response Policies 
We at Farmers Union Oil Company 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.  Unforeseeably, if such a 
release does occur, our trained emergency response personnel are at hand to control and mitigate the 
effects of the release.    We are also coordinated with the Mahnomen Fire Department which 
provides additional emergency response expertise. 
 2. The Stationary Source and the Regulated Substances Handled 
Our facility's  
primary activities includes support services  for crop production.  We have Anhydrous 
Ammonia  stored in one 30,000 gallon tank located at our facility in Mahnomen, MN (Figure 1).  
The maximum amount stored is 25,800 gallons (132,767 lbs.) at the maximum fill capacity of 86%. 
 3. The Worst Case Release Scenario and the Alternative Release Scenarios 
To perform the required offsite consequence analysis for our facility, we utilized RMP Comp  
provided by the Environmental Protection Agency (EPA).  The following paragraphs provide details 
of the chosen scenarios. 
The worst case release scenario involves a catastrophic release of the entire contents of the 
anhydrous ammonia storage tank (132,767 lbs.) in gaseous form over 10 minutes.   At Class F 
atmospheric stability, 1.5 m/s windspeed  and urban topography, the maximum distance of 5.2 miles 
is obtained corresponding to a toxic endpoint of 0.14 mg/L (Figure 2). 
The alternative release scenario involves a release from a anhydrous ammoni 
a product line.  The 
scenario involves the release of 1280 lbs. of ammonia in a gaseous form over 10 minutes.  Under 
neutral weather conditions, the maximum distance to the toxic endpoint of 0.14 mg/L of Ammonia 
is 0.19 miles (Figure 3). 
 4. The General Accidental Release Prevention Program 
Our facility has taken all the necessary steps to comply with the accidental release prevention 
requirements set out under 40 CFR part 68 of the EPA.  The following sections briefly describe 
the elements of the release prevention program that is in place at our stationary source. 
Process Safety Information 
Farmers Union Oil Company maintains a detailed record of safety information that describes the 
chemical hazards, operating parameters and equipment designs associated with all processes 
(Appendix E). 
Process Hazard Analysis 
Our facility conducts comprehensive studies to ensure that hazards associated with our processes are 
identified and controlled efficiently.  Any findings related to the  
hazard analysis are addressed in a 
timely manner. 
Operating Procedures 
For the purposes of safely conducting activities within our covered processes, Farmers Union Oil 
Company maintains written operating procedures.  These procedures address various modes of 
operation and the information is regularly reviewed and is readily accessible to operators involved 
in the processes (Appendix B). 
Farmers Union Oil Company 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 (Appendix C). 
Mechanical Integrity 
Farmers Union Oil Company carries out highly documented maintenance checks on process 
equipment to ensure proper operations.  Process equipment examined by these checks includes 
among others; pressure vessels, storage tanks, piping systems, relief and vent systems, emergency 
shutdown systems, controls and pumps.  Maintenance operations are carried out by qualifi 
personnel with previous training in maintenance practices.  Any equipment deficiencies identified 
by the maintenance checks are corrected in a safe and timely manner (Appendix D). 
Management of Change 
Written procedures are in place at Farmers Union Oil Company to manage changes in process 
chemicals, technology, equipment and procedures.  Process operators, maintenance personnel or any 
other employee whose job tasks are affected by a modification in process conditions are promptly 
made aware of and offered training to deal with the modification. 
Pre-startup Reviews 
Pre-start up safety reviews related to new processes and to modifications in established processes 
are conducted as a regular practice at Farmers Union Oil Company..  These reviews are conducted 
to confirm that construction, equipment, operating and maintenance procedures are suitable for safe 
startup prior to placing equipment into operation. 
Compliance Audits 
Farmers Union Oil Company has compliance audits conducted  
on a regular basis to determine 
whether the provisions set out under the RMP rule are being implemented.  If the compliance audit 
discover non-compliances  in the system, they are promptly corrected. 
Employee Participation 
Farmers Union Oil Company  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 rule, including 
information resulting from process hazard analyses in particular. 
 5. Five-year Accident History 
Farmers Union Oil Company has had an excellent record of preventing accidental releases over the 
last 5 years.  Due to our stringent release prevention policies, there has been no accidental release 
during this period. 
 6. Emergency Response Plan 
Farmers Union Oil Company carries 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, notification of local emergency response agencies and 
the public (Appendix A).
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