R18-2-506. Relationship to Individual Permits

Any source covered under a general permit may request to be excluded from coverage by applying 

for an individual source permit. Coverage under the general permit shall terminate on the date the 

individual permit is issued.

Historical Note

Former Section R9-3-1008 renumbered effective January 13, 1976 (Supp. 76-1). Former 

Section R9-3-506 repealed, new Section R9-3-506 adopted effective May 14, 1979 

(Supp. 79-1). Amended effective July 9, 1980 (Supp. 80-4). Amended subsection (C), 

paragraph (1) effective June 19, 1981 (Supp. 81-3). Former Section R9-3-506 

renumbered without change as Section R18-2-506 (Supp. 87-3). Amended effective 

September 26, 1990 (Supp. 90-3). Former Section R18-2-506 renumbered to R18-2-706; 

new Section R18-2-506 adopted effective November 15, 1993 (Supp. 93-4).
R18-2-706. Standards of Performance for Existing Nitric Acid Plants

A. No person shall cause, allow or permit discharge from any nitric acid plant producing weak nitric acid, which is either:

1. 30 to 70% in strength by either the increased pressure or atmospheric pressure process, or

2. More than 1.5 kg of total oxides of nitrogen per metric ton (3.0 lbs/ton) of acid produced expressed as nitrogen dioxide.

B. The opacity of any plume subject to the provisions of this Section shall not exceed 10%.

C. A continuous monitoring system for the measurement of nitrogen oxides shall be installed, calibrated, maintained and operated by the owner or operator, in

accordance with Section R18-2-313.

D. The test methods and procedures required by this Section are as follows:

1. The reference methods in 40 CFR 60, Appendix A shall be used to determine compliance with the standard prescribed in subsection (A) as follows:

a. Method 7 for the concentration of NOx;

b. Method 1 for sample and velocity traverses;

c. Method 2 for velocity and volumetric flow rate;

d. Method 3 for gas analysis.

2. For Method 7, the sample site shall be selected according to Method 1 and the sampling point shall be the centroid of the stack or duct or at a point no

closer to the walls than 1 m (3.28 ft.). Each run shall consist of at least four grab samples taken at approximately 15-minute intervals. The arithmetic

mean of the samples shall constitute the run value. A velocity traverse shall be performed once per run.

3. Acid production rate, expressed in metric tons per hour of 100% nitric acid, shall be both:

a. Determined during each testing period by suitable methods, and

b. Confirmed by a material balance over the production system.

4. For each run, nitrogen oxides, expressed in g/metric ton of 100% nitric acid, shall be determined by dividing the emission rate in g/hr by the acid

production rate. The emission rate shall be determined by the equation:

 g/hr = Qs x c

 where Qs = volumetric flow rate of the effluent in dscm/hr, as determined in accordance with subsection (D)(1)(c), and c = NOx concentration in

g/dscm, as determined in accordance with subsection (D)(1)(a).

Historical Note

Former Section R18-2-706 repealed effective September 26, 1990 (Supp. 90-3). New Section R18-2-706 renumbered from R18-2-506 effective

November 15, 1993 (Supp. 93-4).