Type of Facility K
Primary Copper Smelter 0.50
Primary Lead Smelter 0.61
(all processes except Sintering
Machine, Discharge End, and
Equipment Ventilation)
Metallurgical Sulfuric Acid Plant 0.61
Primary Zinc Smelter 0.61
Other Primary Smelters 0.90
Primary Lead Smelter Sintering 1.17
Machine Discharge End and Equipment
Ventilation
Secondary Metal Recovery Facilities 1.17
When two or more gas streams either wholly or in part are discharged through a single stack, the combined flow rate of all streams shall be used to determine the required standard effective stack height. If streams with different SO2 concentration allowables, as determined in subsection (b) of this section, are combined into a single stream, the required effective stack height is determined as follows:
(1) Calculate a total combined stream SO2 concentration allowable as follows:
PPMt = (PPM1)(SCFM1)+(PPM2)(SCFM2) + ...(PPMn)(SCFMn)
(SCFM1 + SCFM2 + ...SCFMn)
Where:
PPMt = Allowable SO2 concentration in total combined stream, ppmv
PPM1 = Allowable SO2 concentration in stream No.1, ppmv
PPM2 = Same as PPM1 except for stream No. 2
PPMn = Same as PPM1 except for Nth stream
SCFM1 = Effluent flow rate of stream No. 1, scfm
SCFM2 = Same as SCFM1 except for stream No. 2
SCFMn = Same as SCFM1 except for Nth stream
(2) Calculate interpolation constant (Kt) for the total combined stream as follows:
Kt = (PPMt-PPMx) (Kh-Kx) + K
(PPMh-PPMx)
Where:
Kt = Interpolation constant for use in the following standard effective stack height equation
PPMt = Allowable SO2 concentration in total combined stream
previously calculated and for the stated total ppmv, the other parameters are:
PPMt PPMx PPMh Kx Kh
650 to 1,000 650 1,000 0.50 0.61
1,000 to 2,500 1,000 2,500 0.61 0.90
> 2,500 2,500 3,500 0.90 1.17
(3) Calculate standard effective stack height for total combined stream as follows: