Section 1200-03-16-.07 - NITRIC ACID PLANTS(1) Applicability. The provisions of this rule shall apply to each nitric acid production unit commenced on or after April 3, 1972, which is the affected facility.(2) Definitions. (a) "Nitric acid production unit" means any facility producing weak nitric acid by either the pressure or atmospheric pressure process.(b) "Weak acid production unit" means acid which is thirty (30) to seventy (70) percent in strength.(3) Standards for nitrogen oxides and opacity. On and after the date on which the performance test required to be conducted by paragraph .01(5) of this chapter is completed, no owner or operator subject to the provisions of this rule shall cause to be discharged into the atmosphere from any affected facility any gases which: (a) Contain nitrogen oxides, expressed as NO2, in excess of 1.5 kg per metric ton of acid produced (3.0 lb. per ton), the production being expressed as 100 percent nitric acid.(b) Exhibit ten (10) percent opacity, or greater.(4) Emission Monitoring.(a) A continuous monitoring system for the measurement of nitrogen oxides shall be installed, calibrated, maintained, and operated by the owner or operator. The pollutant gas used to prepare calibration gas mixtures under paragraph 2.1, Performance Specification 2, Appendix B, Federal Register, Vol. 40, No. 194, and for calibration checks under subparagraph .01(8)(d) of this chapter, shall be nitrogen dioxide (NO2). The span shall be set at 500 ppm of nitrogen dioxide. The method for nitrogen oxides specified in accordance with the provisions of paragraph .01(5) of this chapter shall be used for conducting monitoring system performance evaluations under subparagraph .01(8)(c) of this chapter.(b) The owner or operator shall establish a conversion factor for the purpose of converting monitoring data into units of the applicable standard (kg/metric ton, lb/short ton). The conversion factor shall be established by measuring emissions with the continuous monitoring system concurrent with measuring emissions with the applicable reference method tests. Using only that portion of the continuous monitoring emission data that represents emission measurements concurrent with the reference method test periods, the conversion factor shall be determined by dividing the reference method test data averages by the monitoring data averages to obtain a ratio expressed in units of the applicable standard to units of the monitoring data, i.e., kg/metric ton per ppm (lb/short ton per ppm). The conversion factor shall be re-established during any performance test under paragraph .01(5) of this chapter or any other continuous monitoring system performance evaluation under subparagraph .01(8)(c) of this chapter.(c) The owner or operator shall record the daily production rate and hours of operation.(d) For the purpose of reports required under subparagraph .01(7)(c) of this chapter, periods of excess emissions that shall be reported are defined as any three-hour period during which the average nitrogen oxides emissions (arithmetic average of three contiguous one-hour periods) as measured by a continuous monitoring system exceed the standard under paragraph (3) of this rule.(5) Test methods and procedures: (a) The sampling point for nitrogen oxides shall be the centroid of the stack or duct if the cross-section area is less than 50 ft2 or at a point no closer to the walls than 1 m (3.28 ft), if the area is 50 ft2 or greater. Each run shall consist of at least four (4) grab samples taken at approximately fifteen (15) minute intervals. The arithmetic mean of the samples shall constitute the run value. A velocity traverse shall be performed once per run.(b) Acid production rate, expressed in metric tons per hour of 100 percent nitric acid, shall be determined during each testing period by suitable methods and shall be confirmed by a material balance over the production system.(c) For each run, nitrogen oxides, expressed in g/metric ton of 100 percent 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, and
c = NOx concentration in g/dscm.
Tenn. Comp. R. & Regs. 1200-03-16-.07
Original rule filed January 10, 1977; effective February 9, 1977. Amendment filed September 10, 1981; effective October 19, 1981.Authority: T.C.A. §§ 68-25-105 and 4-5-202.