Anhydrous ammonia storage tanks and distribution facilities that meet the following conditions of this section are exempt.
- (1) All valves, connectors, and hoses, associated with permanent storage tanks and any nurse tanks stored on-site, shall be properly maintained in leak-proof condition at all times.
- (2) The capacity of each permanent storage tank is 30,000 gallons or less.
- (3) When transferring ammonia, all vapors shall be vented back to the host tank and never to the atmosphere.
- (4) When relieving pressure from hoses associated with permanent storage tanks and any nurse tanks, all vapors shall be bled into an adequate volume of water and never to the atmosphere.
- (5) Each permanent storage tank and any nurse tanks stored on-site are equipped to prevent unauthorized operation.
- (6) Before construction begins, written site approval must be received from the regional director and the owner or operator shall file with the commission's Office of Air Quality in Austin a completed Form PI-7 and supporting documentation demonstrating that all of the requirements of this section will be met.
- (7) Each permanent storage tank is located at least 1/4 mile from any recreational area or residence or other structure not occupied or used solely by the owner of the property upon which the facility is located.
Source Note:The provisions of this §106.477 adopted to be effective March 14, 1997, 22 TexReg 2439; amended to be effective August 4, 1998, 23 TexReg 7830.