Ariz. Admin. Code § 18-2-707

Current through Register Vol. 30, No. 45, November 8, 2024

Section R18-2-707 - Standards of Performance for Existing Sulfuric Acid Plants

A. Facilities that produce sulfuric acid by the contact process by burning elemental sulfur, alkylation acid, hydrogen sulfide, organic sulfide and mercaptans or acid sludge shall not discharge into the atmosphere:

1. Greater than 2 kg of sulfur dioxide per metric ton (4 lbs/ton) of sulfuric acid produced (calculated as 100% H₂ SO₄), or

2. Greater than 0.075 kg of sulfuric acid mist per metric ton (0.15 lbs/ton) or sulfuric acid produced (calculated as 100% H₂ SO₄).

B. This Section shall not apply to metallurgical plants or other facilities where conversion to sulfuric acid is utilized as a means of controlling emissions to the atmosphere of sulfur dioxide or other sulfur compounds.

C. A continuous monitoring system for the measurement of sulfur dioxide shall be installed, calibrated, maintained and operated by the owner or operator, in accordance with 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 standards prescribed in subsection (A) as follows:

a. Method 8 for concentration of SO₂ and acid mist;

b. Method 1 for sample and velocity traverses;

c. Method 2 for velocity and volumetric flow rate;

d. Method 3 for gas analysis.

2. The moisture content can be considered to be zero. For Method 8 the sampling time for each run shall be at least 60 minutes and the minimum sample volume shall be 1.15 dscm (40.6 dscf) except that smaller sampling times or sample volumes, when necessitated by process variables or other factors, may be approved by the Director.

3. Acid production rate, expressed in metric tons per hour of 100% H₂ SO₄ , shall be both:

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

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

4. Acid mist and sulfur dioxide emissions, expressed in g/metric ton of 100% H₂ SO₄ , 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-Q_s x c, where Q_s = volumetric flow rate of the effluent in dscm/hr as determined in accordance with subsection (D)(1)(c), and c = acid mist and SO₂ concentrations in g/dscm as determined in accordance with subsection (D)(1)(a).

Ariz. Admin. Code § R18-2-707

Former Section R18-2-707 repealed effective September 26, 1990 (Supp. 90-3). New Section R18-2-707 renumbered from R18-2-507 effective November 15, 1993 (Supp. 93-4).