APPENDIX B-5
Department Calculations for Exide Point Sources
Bureau of Air Quality
Department of Environmental Protection
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Exide Emission Rates Used in Modeling
Stacks Affected by Plan Approval 06-05066I – Information taken from plan approval application
Stack
ACFM
Temperature(◦F)
Moisture Content (%)
Convert to DSCFM
S62
120,000
98.3
1.3
112436.33
S64
320,000
100.1
1.7
297655.42
S63
320,000
114.5
2.0
289308.97
S19
60,700
71.3
2.0
59340.45
S47
33,000
100.1
1.7
30695.72
S23A
42,000
103
2.25
38648.58
Permitted Emission Rates from plan Approval 06-05066I
Stack
Emission Rate (grains/dscf)
S62
0.00006
S64
0.00006
S63
0.00006
S19
0.00003
S47
0.000056
S23A
0.000026
Convert grains/dscf to grams/second
grains/dscf * dscf/minute * 1 lb/7,000 grains * 1 minute/60 sec * 453.6 grams/ lb = grams/second
S62 - 0.007286 Grams/sec
S64 - 0.019288 grams/sec
S63 - 0.018747 grams/sec
S19 - 0.001922 grams/sec
S47 - 0.001856 grams/sec
S23A - 0.001085 grams/sec
Sources not affected by Plan Approval 06-05066I
S70 - The rate is based on a stack test completed in July 1998 for S70 where the average lead emission
rate was measured to be 0.0003 lb/hr. The modeled emission rate was calculated by converting to g/s
and using a 4.2 times multiplier for a maximum emission rate of:
S70 Modeled emission Rate= (0.0003 lb)/hr ((453.6 grams)/lb)(hr/(3600 sec))(4.2)=0.00015876 g/s
S55 - The rate is based on a stack test completed in August 2009 for S55 where the average lead
emission rate was measured to be 0.0266 lb/hr. The modeled emission rate was calculated by
converting to g/s and using a 1.5 times multiplier for a maximum emission rate of:
S55 Modeled emission Rate= (0.0266 lb)/hr ((453.6 grams)/lb)(hr/(3600 sec))(1.5)=0.005027 g/s
S13 - The rate is based on a stack test completed in August 2009 for S13 where the average lead
emission rate was measured to be 0.00211 lb/hr. The modeled emission rate was calculated by
converting to g/s and using a 1.5 times multiplier for a maximum emission rate of:
S13 Modeled emission Rate= (0.00211 lb)/hr ((453.6 grams)/lb)(hr/(3600 sec))(1.5)=0.0003987 g/s
Exide Proposed Emission Rates for S62, S63 and S64
Based on an emission rate of 0.04 mg/dscm
(0.04 mg/dscm)(1gm/1000mg)(1 lb/453.6 gm)(1 dscm/35.31 dscf)(7000 gr/lb) = 0.00001748 gr/dscf
Convert grains/dscf to grams/second
grains/dscf * dscf/minute * 1 lb/7,000 grains * 1 minute/60 sec * 453.6 grams/ lb = grams/second
NOTE: It appears that Exide used the actual cubic feet per minute for calculating emission rates, so use
120,000 dscf/min for S62 and 320,000 dscf/min for S63 and S64
S62 - 0.002265 grams/sec
S63 - 0.006041 grams/sec
S64 - 0.006041 grams/sec
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