R18-2-528. Renumbered 

Historical Note

Adopted effective May 14, 1979 (Supp. 79-1). Amended effective July 9, 1980 (Supp. 80-4). 

Former Section R9-3-528 renumbered without change as Section R18-2-528 (Supp. 87-3). 

Amended effective September 26, 1990 (Supp. 90-3). Renumbered to R18-2-728 effective 

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

R18-2-728. Standards of Performance for Existing Ammonium Sulfide Manufacturing 

Plants

A. The provisions of this Section are applicable to the following affected facilities in ammonium 

sulfide manufacturing plants: sulfide unloading facilities, reactor-absorbers, bubble cap 

scrubbers, and fume incinerators. 

B. No person shall cause, allow or permit to be emitted into the atmosphere, from any type of 

incinerator or other outlet smoke, fumes, gases, particulate matter or other gas-borne material, 

the opacity of which exceeds 20%.

C. No person shall cause, allow or permit to be emitted into the atmosphere from any emission 

point from any incinerator, or to pass a convenient measuring point near such emission point, 

particulate matter of concentrations in excess of 0.1 grain per cubic foot, based on dry flue gas 

at standard conditions, corrected to 12% carbon dioxide.

D. No person shall allow hydrogen sulfide to be emitted from any location in such manner and 

amount that the concentration of such emissions into the ambient air at any occupied place 

beyond the premises on which the source is located exceeds 0.03 parts per million by volume 

for any averaging period of 30 minutes or more.

E. Where a stack, vent or other outlet is at such a level that fumes, gas mist, odor, smoke, vapor or 

any combination thereof constituting air pollution are discharged to adjoining property, the 

Director may require the installation of abatement equipment or the alteration of such stack, 

vent, or other outlet by the owner or operator thereof to a degree that will adequately dilute, 

reduce or eliminate the discharge of air pollution to adjoining property.

F. The owner or operator of any ammonium sulfide tailgas incinerator subject to the provisions of 

this Section shall do both of the following:

1. Install, calibrate, maintain, and operate a flow measuring device which can be used to 

determine either the mass or volume of tailgas charged to the incinerator. The flow 

measuring device shall have an accuracy of ± 5% over its operating range.

2. Provide access to the tailgas charged so that a well-mixed representative grab sample can be 

obtained.

G. 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 standards prescribed in this Section as follows:

a. Method 5 for the concentration of particulate matter and the associated moisture content;

b. Method 1 for sample and velocity traverse;

c. Method 2 for velocity and volumetric flow rate;

d. Method 3 for gas analysis and calculation of excess air, using the integrated sample 

technique;
e. Method 11 shall be used to determine the concentration of H2S and Method 6 shall be 

used to determine the concentration of SO2.

2. For Method 5, the sampling time for each run shall be at least 60 minutes and the minimum 

sample volume shall be 0.85 dscm (30.0 dscf) except that shorter sampling times and 

smaller sample volumes, when necessitated by process variables or other factors, may be 

approved by the Director.

3. Particulate matter emissions, expressed in g/dscm, shall be corrected to 12% CO2 by using 

the following formula:

C12 = 12c 

%CO2

where:

C12 = the concentration of particulate matter corrected to 12% CO2,

c = the concentration of particulate matter as measured by Method 5, and

%CO2 = the percentage of CO2 as measured by Method 3, or, when applicable, the adjusted 

outlet CO2 percentage.

4. If Method 11 is used, the gases sampled shall be introduced into the sampling train at 

approximately atmospheric pressure. Where fuel gas lines are operating at pressures 

substantially above atmosphere, this may be accomplished with a flow control valve. If the 

line pressure is high enough to operate the sampling train without a vacuum pump, the 

pump may be eliminated from the sampling train. The sample shall be drawn from a point 

near the centroid of the fuel gas line. The minimum sampling time shall be 10 minutes and 

the minimum sampling volume 0.01 dscm (0.35 dscf) for each sample. The arithmetic 

average of two samples of equal sampling time shall constitute one run. Samples shall be 

taken at approximately one-hour intervals. For most fuel gases, sample times exceeding 20 

minutes may result in depletion of the collecting solution, although fuel gases containing 

low concentrations of hydrogen sulfide may necessitate sampling for longer periods of 

time.

5. If Method 5 is used, Method 1 shall be used for velocity traverses and Method 2 for 

determining velocity and volumetric flow rate. The sampling site for determining CO2

concentration by Method 3 shall be the same as for determining volumetric flow rate by 

Method 2. The sampling point in the duct for determining SO2 concentration by Method 3 

shall be at the centroid of the cross section if the cross sectional area is less than 5 m2(54 

ft2) or at a point no closer to the walls than 1 m (3.28 feet) if the cross sectional area is 5 

m2or more and the centroid is more than 1 meter from the wall. The sample shall be 

extracted at a rate proportional to the gas velocity at the sampling point. The minimum 

sampling time shall be 10 minutes and the minimum sampling volume 0.01 dscm (0.36 

dscf) for each sample. The arithmetic average of two samples of equal sampling time shall 

constitute one run. Samples shall be taken at approximately one-hour intervals.

Historical Note

Section R18-2-728 renumbered from R18-2-528 effective November 15, 1993 (Supp. 93-4).