Year of Test 

Data

SV021 

SO2 

lb/hr

SV022 

SO2 

lb/hr

SV023 

SO2 

lb/hr

SV024 

SO2 

lb/hr

SV025 

SO2 

lb/hr

SV026 

SO2 

lb/hr

SV027 

SO2 

lb/hr

SV028 

SO2 

lb/hr

SV029 

SO2 

lb/hr

SV030 

SO2 

lb/hr

SV031 

SO2 

lb/hr

SV032 

SO2 

lb/hr

2010 11.00 15.00 13.00 16.00 21.00 18.00 15.00 8.50 9.10 13.00 18.00 23.00

12.00 14.00 14.00 15.00 21.00 18.00 15.00 8.80 9.40 13.00 19.00 23.00

13.00 12.00 15.00 16.00 22.00 19.00 15.00 8.50 9.40 14.00 19.00 23.00

2005 3.90 6.70 7.80 10.00 7.40 8.60 13.00 14.00

4.40 6.70 11.00 10.00 7.10 8.70 13.00 14.00

4.80 5.10 11.00 9.40 6.50 9.00 14.00 13.00

2004 14.00 11.00 7.10 7.30

16.00 11.00 4.20 5.60

16.00 10.00 8.60 5.30

1999 19.90 8.60 11.20 17.00 8.20 22.30

14.20 10.10 9.60 6.80 3.50 12.80

13.40 14.80 16.20 10.60

16.26 18.37 16.86 11.58 12.04 20.32 16.09 18.48

18.73 18.90 10.68 13.25 12.10 16.75 17.68 23.03

19.68 18.52 16.40 15.27 12.84 15.98 17.03 22.26

May 1994 6.48 8.20 6.54 5.28 7.06 7.31 9.81 11.20

6.15 5.82 7.16 8.06 7.04 5.87 5.17 8.37

6.32 6.61 7.06 8.87 6.94 7.43 5.92 7.35

1994

ppm 5.20 6.00 5.20 4.10 4.90 5.00 7.00 8.00

DSCFM 125200 137200 126300 129400 144600 146700 140700 140600

ppm 5.20 5.00 5.70 6.50 5.60 4.30 3.50 5.30

DSCFM 118800 116900 126200 124500 126200 137000 148200 158600

ppm 5.40 5.00 5.10 6.50 5.10 5.00 3.90 5.60

Line 1 Line 2 Line 3

Oct., Sept. & 

June 1994

Hibbing
DSCFM 117600 132700 139000 137000 136700 149200 152300 131700

1994

ppm 11.70 12.20 10.60 7.10 8.10 11.40 11.00 10.60

DSCFM 139500 151200 159700 163800 149200 179000 146900 175000

ppm 13.30 12.10 6.70 7.80 7.90 9.60 11.80 13.50

DSCFM 141400 156800 160000 170600 153800 175200 150400 171300

ppm 14.50 12.10 10.00 8.80 8.50 9.70 11.90 12.70

DSCFM 136300 153700 164700 174200 151700 165400 143700 176000

Data from 1994 was submitted as ppm and was converted to lb/hr using the equation lb/hr=ppm*DSCFM*60*1.660*10-7. (See 40 

CFR 75 Appendix F for conversion factor.)
SV021 

SO2 

lb/hr

SV022 

SO2 

lb/hr

SV023 

SO2 

lb/hr

SV024 

SO2 

lb/hr

SV025 

SO2 

lb/hr

SV026 

SO2 

lb/hr

SV027 

SO2 

lb/hr

SV028 

SO2 

lb/hr

SV029 

SO2 

lb/hr

SV030 

SO2 

lb/hr

SV031 

SO2 

lb/hr

SV032 

SO2 

lb/hr

1 3.90 5.10 6.54 5.28 6.94 5.87 4.20 5.30 3.50 8.60 13.00 12.80

2 4.40 5.82 7.06 8.06 7.04 7.31 5.17 5.60 6.50 8.70 13.00 13.00

3 4.80 6.61 7.16 8.87 7.06 7.43 5.92 6.80 7.10 9.00 14.00 14.00

4 6.15 6.70 7.80 9.40 13.40 8.60 7.10 7.30 7.40 13.00 16.09 14.00

5 6.32 6.70 11.00 10.00 14.00 10.00 8.60 7.35 8.20 13.00 17.03 18.48

6 6.48 8.20 11.00 10.00 14.20 10.10 9.60 8.37 9.10 14.00 17.68 22.26

7 11.00 12.00 13.00 15.00 16.00 11.00 9.81 8.50 9.40 15.98 18.00 22.30

8 12.00 14.00 14.00 16.00 16.00 11.00 10.68 8.50 9.40 16.75 19.00 23.00

9 13.00 15.00 15.00 16.00 16.26 14.80 11.20 8.80 12.04 20.32 19.00 23.00

10 18.73 18.00 15.00 10.60 12.10 23.00

11 19.68 18.00 15.00 11.20 12.84 23.03

12 19.90 18.37 15.00 11.58

13 21.00 18.52 16.20 13.25

14 21.00 18.90 16.40 15.27

15 22.00 19.00 16.86 17.00

n = 9 9 9 9 15 15 15 15 11 9 9 11

m = (n + 1)*.95 9.5 9.5 9.5 9.5 15.2 15.2 15.2 15.2 11.4 9.5 9.5 11.4

UPL = xm= 13.00 15.00 15.00 16.00 22.00 19.00 16.86 17.00 12.84 20.32 19.00 23.03

59.00 74.86 75.20

Line 1

UPL Line 1 = UPL Line 2 = UPL Line 3 =

Hibbing

Line 2 Line 3