Na-Churs Alpine Solutions - Executive Summary
1. The accidental release prevention and emergency response policies at the facility: |
The Na-Churs Alpine Solutions (Na-Churs) facility located in Corydon, Indiana complies with applicable requirements for ammonia storage, and it is our policy to adhere to all applicable federal, state, and local laws. If an emergency accidental release were to occur involving our ammonia storage system, it is our policy to immediately notify the Harrison County Sherriff's Office, who would notify the local fire department and/or emergency medical services, who would respond to the emergency.
2. A description of the facility and the regulated substances handled:
The Na-Churs facility produces plant food for commercial and private use. The plant food product is produced by mixing several chemicals in a reactor, including ammonia. The ammonia storage process consists of two above ground storage tanks (13,000 gallons each) and associated piping, valves, pumps, and other miscellaneous equipment.
. The worst-case release scenario:
The worst-case release scenario for the Na-Churs facility considers the potential failure of one of the 13,000-gallon storage tanks (the largest vessel) filled to 90% of its holding capacity (administrative controls limit each ammonia storage tank to 90% of capacity), resulting in a liquid spill and subsequent vaporization. Utilizing a computer-based version (RMP*Comp) of the methodology presented in USEPA's "RMP Offsite Consequence Analysis Guidance", USEPA, May 24, 1996, the distance to the toxic endpoint (0.14 mg/L) was determined to be 0.5 miles. The public receptors affected under this worst-case release scenario include: private residences; agricultural land; and, commercial, office, and/or industrial facilities. The residential population within this 0.5-mile radius is approximately 34 persons, which was estimated using an Environmental Data Resources - Offsite Receptor Report.
4. The alternative release scenario:
The alternative relea
se scenario for the Na-Churs facility considers the potential release of ammonia through the transfer hose (i.e., caused by a rupture of the connection between the ammonia unloading station piping and the ammonia delivery tanker truck), resulting in a liquid spill and subsequent vaporization. The release rate of ammonia from the 2" diameter transfer hose with an initial operating flow rate of 745 pounds per minute was determined, using RMP*Comp, to be 1,780 pounds per minute (13.4 pounds per minute to the outside air). It was assumed that the release occurred for a duration of 0.3 minutes. Therefore, the alternative release scenario modeled a release of a total of 534 pounds of ammonia. Utilizing RMP*Comp, the distance to the toxic endpoint was determined to be <0.1 miles. The public receptors affected under this alternative release scenario include private residences and commercial, office, and/or industrial facilities. The residential population within this 0.1-mile radius is a
pproximately 2 persons, which was estimated using an Environmental Data Resources - Offsite Receptor Report.
5. The general accidental release prevention program and chemical-specific prevention steps:
The Na-Churs facility complies with USEPA's accident prevention rule and all applicable federal, state and local codes and regulations. The ammonia system is designed, installed, and maintained in accordance with applicable state law at the Na-Churs facility in Corydon, Indiana.
6. Five-year accident history:
The Na-Churs facility has never had an accident involving its ammonia process. This accident history includes no events resulting in deaths, injuries, property or environmental damage, evacuations, or shelterings in place.
7. The emergency response program:
In the event of an emergency accidental release involving the ammonia storage system, it is Na-Churs' policy to immediately notify the Harrison County Sherriff's Office, who would notify the local fire department and/o
r emergency medical services, who would respond to the emergency. We have communicated this policy with the Harrison County Sherriff's Office.
8. Planned changes to improve safety: NONE