Butte County Rice Growers Association - Executive Summary
Butte County Rice Growers Association |
1. Facility Accidental Release Policy
The owners, management, and employees of Butte County Rice Growers Association, Richvale facility (herein referred to as the Facility) at 1121 Richvale Highway, Richvale, California, 95974 are committed to the prevention of any accidental release of anhydrous ammonia and aqua ammonia. If an accidental release should occur, the facility is prepared to work with the local fire department, or other authorities to mitigate any release and minimize the impact of the release to people and the environment. A detailed emergency response plan has been developed and will be implemented in the event of an accidental release.
2. Facility Information
The primary activity at the Facility is the storage, blending, and sale of fertilizers, in addition to, the sale of pre-packaged agricultural chemicals to farmers.
Anhydrous ammonia is received, stored, and distributed for use in the production of aq
ua ammonia which is used in mixed grade fertilizers.
Anhydrous ammonia is received by truck and stored in one 100-ton and one 30-ton storage tank (bullets) at the site. The maximum quantity of anhydrous ammonia handled in this process is 221,000 pounds.
Aqua ammonia (20% of ammonia by weight) is produced at the site using an aqua ammonia convertor and stored in two 56,000 gallon and one 40,000 gallon above ground tanks at the site. The storage tanks are located within a secondary containment structure. The maximum quantity of aqua ammonia handled is 1,140,000 pounds. The total quantity of ammonia present in the aqua ammonia, based on 20% active ingredient by weight, is 228,000 pounds.
3. The Worst-Case Release Scenario and Alternative Release Scenarios
a. Anhydrous Ammonia Alternative Release Scenarios
The first alternative release scenario is failure of the largest storage tank when filled to the greatest amount would release 170,000 pounds of anhydrous ammonia, which rep
resents the volume of the largest storage tank at 85% capacity as limited by regulations. The distance to the endpoint (point of dispersion to 200 ppm) is 2.87 miles. The second alternative release scenario, based on the PHA scenarios (or the most likely potential incident) and is a release from a broken 3-inch diameter pipe. The distance to the endpoint (point of dispersion to 200 ppm) is 1.56 miles.
b. Aqua Ammonia Worst-Case and Alternative Release Scenarios
The worst-case release scenario is failure of the largest storage tank when filled to the greatest amount would release 420,000 pounds of solution ammonia (containing 84,000 pounds ammonia based on a 20% active ingredient) into the containment area. The distance to the endpoint (point of dispersion to 200 ppm) is 4.2 miles. The alternative release scenario, based on the PHA scenarios (or the most likely potential incident) is a release of 10,000 pounds of solution ammonia (containing 2,000 pounds ammonia based on a 20
% active ingredient) from a storage tank modeled with an increased wind speed and "D" Stability modeling parameters. The distance to the endpoint (point of dispersion to 200 ppm) is 0.3 miles.
4. Accidental Release Prevention Program
Anhydrous Ammonia and Aqua Ammonia: The Facility has implemented the provisions of the "Safety Requirements for Storage and Handling of Anhydrous Ammonia, K-61.1", published by the American National Standards Institute, Inc.; California Code of Regulations, Title 8, Subchapter 1, "Unfired Pressure Vessel Safety Orders"; and the standards of the U.S. Occupational Safety and Health Administration (OSHA), 29 CFR 1910.111, "Storage and Handling of Anhydrous Ammonia."
5. Five-year Accident History
a. There have been no accidental releases or near misses of anhydrous ammonia or aqua ammonia in the past five years that:
1. Have caused any deaths, injuries, or significant property damage at the facility; nor
2. Have resulted in off-site deaths, injurie
s, evacuations, sheltering in place, property damage, or environmental damage.
6. The Emergency Response Program
The facility's emergency response program was written in accordance with the following regulations:
OSHA 29 CFR 1910.38;
OSHA 29 CFR 1910.120; and
Section 25503, Division 6.95 of the California Health and Safety Code
7. Planned Changes to Improve Safety
Safety improvement is an on-going process at the facility. Periodic evaluations are performed to assess the maintenance of safe conditions. Specific planned changes to the anhydrous ammonia and aqua ammonia processes at the facility are listed in the Facility PHAs.