Tenn. Comp. R. & Regs. 1200-03-12-.03 - SOURCE SAMPLING AND ANALYSIS

The methods set forth in this section shall be applicable for determining compliance with emission standards.

(a) SAMPLE AND VELOCITY TRAVERSES. - Sample and velocity traverses shall be determined by Method 1 outlined in the Federal Register, Volume 42, Number 160, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978.

(b) STACK GAS VELOCITY DETERMINATION. - Stack gas velocity shall be determined by Method 2 outlined in the Federal Register, Volume 42, Number 160, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978, except in such instances where a Type S pitot tube is not applicable.

(c) GAS ANALYSIS. - Gas analysis for carbon dioxide, oxygen, excess air, and dry molecular weight shall be determined by Method 3 outline in the Federal Register, Volume 42, Number 160, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978, or another type of test procedure that is direct indicating and/or recording approved by the Technical Secretary.

(d) DETERMINATION OF MOISTURE CONTENT IN STACK GASES. - Moisture content shall be determined by Method 4 outline in the Federal Register, Volume 42, Number 60, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978, or other technique approved by the Technical Secretary.

(e) DETERMINATION OF PARTICULATE EMISSIONS. - The basic design of the sampling train is left to the individual, if certain criteria are observed to assure high collection efficiency and standard analysis of the collected particulates.

1. DESCRIPTION OF SAMPLING APPARATUS.

(i) This apparatus shall include interchangeable sampling nozzles or probes, of various diameters, a filter effective for the removal of particulates exceeding 0.3 micron diameter of solid or liquid, a suitable number of impingers to reduce condensable vapors to liquid or solid particulate matter, and appropriate connecting tubing at temperatures above the aqueous dewpoint of the gases. All materials of construction shall be resistant to corrosive elements in the flue gases, e.g., SO₂, NO_x and elevated temperatures.

(ii) This filter assembly shall be maintained above the aqueous dewpoint of the flue gases throughout the sampling operation. To accomplish this, the filter assembly may be disposed inside the gas flue to be completely bathed by the hot gas stream; or it may be disposed outside the gas stream, provided the following precautions are taken.

(I) If the filter is disposed outside the hot gas flue, a temperature indicator, e.g., thermocouple, shall be provided at the sample filter gas exit to monitor the filter temperature above the aqueous dewpoint of the flue gases at all times. Auxiliary heating elements for tubing and filter holder shall be provided to maintain specified temperatures when required.

(II) Deposits in the tube connecting the probe to the exterior filter shall be quantitatively removed by washing with a suitable liquid and by brushing, the weight of solids recovered therefrom being added to the weight found in the filter.

(iii) Provisions shall be included for cooling the gas stream to standard conditions (70°F) to reduce condensable vapors to liquid or solid particulate matter, and for cooling the condensed particles, including water that may be formed by condensation of water vapor in the sample. This shall be accomplished by passage through bubblers provided with an orifice submerged in water through which the gas stream passes at a velocity of approximately 100 meters per second. The bubblers should be immersed in an ice bath to minimize evaporation. A trap of suitable shape and dimensions for the collection of overflow or overspray shall be provided downstream from the bubblers.

(iv) An indicating flowmeter shall be provided and preferably located in the train at a point preceding the source of suction, preceded by a trap to prevent condensed water from entering the flowmeter; and a vacuum gauge adjacent to the flowmeter to indicate the absolute pressure of the gas passing through the orifice meter.

(v) Operation charts comprising either graphs or tables shall be prepared and be available as a part of the apparatus, to indicate proper sampling rates as a function of gas density in the stack and at the flowmeter.

2. ANALYTICAL RESULTS. Analytical results shall be accomplished as outlined in the appendix of the Federal Register, Volume 36, Number 160, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978, for the filter catch and washings up to the filter. Inclusion or exclusion of material collected in the impinger train as "particulate matter" and method of analysis will be determined on an individual air contaminant source basis.

3. EQUIVALENT METHODS. Those procedures demonstrated to yield equivalent results and approved by the Technical Secretary may be used for sampling and analysis of particulate matter. Stack sampling methods promulgated by the Environmental Protection Agency for specified air contaminant sources are considered to be equivalent methods and therefore acceptable.

(f) Measurement of Sulfur Dioxide in Stack Gases.

1. The approved procedure for measuring sulfur dioxide in stack gases is the method contained in Chapter 3 of the Tennessee Department of Public Health's January, 1975 edition of the Source Sampling Manual as amended on August 11, 1975.

2. Equivalent Methods. Many new and improved methods of continuous gaseous monitoring in stacks are now in use. Any method of stack sampling approved by the Technical Secretary may be used in accordance with good professional practice. Stack sampling methods promulgated by the Environmental Protection Agency for specified air contaminant sources are considered to be equivalent methods and therefore acceptable.

(g) Determination of Sulfuric Acid (H₂SO₄) in Stack Gases. Sulfuric acid in stack gases shall be determined by Method 8 outlined in the Federal Register, Volume 42, Number 160, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978.

(h) Determination of Nitrogen Oxides in Stack Gases. Nitrogen oxides in stack gases shall be determined by Method 7 outlined in the Federal Register, Volume 42, Number 160, August 18, 1977, as amended in the Federal Register, Volume 43, Number 57, March 23, 1978.

(i) Determination of the Efficiency of Fluoride Control Devices for Potrooms of Primary Aluminum Reduction Plants as follows:

1. The determination shall consist of three sample runs, each of which shall consist of a simultaneous inlet and outlet sample upon the control device or an equivalent test procedure approved by the Technical Secretary. Each sample shall be of eight (8) hours duration and shall contain a minimum of two hundred and forty (240) dry standard cubic feet of air.

2. Other details as to the collection of the samples and their analysis shall be accomplished by either Method 13A or 13B or approved equivalent as outlined in the Federal Register, Volume 40, Number 152, August 6, 1975 and as amended in the Federal Register, Volume 41, Number 230, November 29, 1976.

3. The average efficiency of each fluoride control device shall be calculated as the average of the three control device collection efficiencies as determined by the three sample runs.

(j) Determination of Inorganic Lead Emissions in Stack Gases. Lead emissions in stack gases shall be determined by Method 12 outlined in the Federal Register, Volume 47, April 16, 1982, pp 16574-16579.

Notes

Tenn. Comp. R. & Regs. 1200-03-12-.03

Original rule certified June 7, 1974. Amendment filed March 22, 1976; effective April 21, 1976. Amendment filed March 13, 1978; effective April 12, 1978. Amendment filed October 2, 1979; effective November 16, 1979. Amendment filed December 8, 1981; effective January 22, 1982. Amendment filed July 3, 1984; effective August 1, 1984.

Authority: T.C.A. § 68-25-105 et. seq .