HomeMy WebLinkAboutAQ_F_0800107_20101201_MOD_RFI-Resp -4S
1836 Eastchester Dr.
Suite 108
/ LLCI High Point,NC 27265
Energy Solutions 0: 360.750.3583
F: 360.750.3483
November 23,2010
Ms. Betsy Huddleston
Environmental Engineer II
Washington Regional Office
NCDENR—Division of Air Quality
943 Washington Square Mall
Washington,NC 27889
Re: Revised Toxic Air Pollutant Modeling Analysis
Wellons Energy Solutions-Lewiston Facility
Dear Ms. Huddleston:
As a follow-up to our email communication from November 17, 2010, please find enclosed a
copy of the revised toxic air pollutant modeling analysis for the proposed Wellons Energy
Solutions (Wellons) Lewiston facility. Per the North Carolina Department of Environment and
Natural Resources(NCDENR)guidance, the toxic air pollutant modeling previously submitted in
September 2010 was revised by establishing a representative stack for the three boilers and
modeling the facility's emissions through that representative stack. Since all three boiler stacks
are proposed to be identical and in very near proximity of one another, a centrally located stack,
Boiler 2 stack, was utilized for this representative stack location. By modeling in this manner, it
is Wellons expectation that NCDENR can establish a permit with a facility wide throughput
limitation rather than a unit-specific throughput limitation.
The attached CD contains a copy of the revised model input and output files, including building
downwash. Revised modeling results tables are also included as an attachment and indicate that
the facility is in compliance with the toxics modeling requirements.
Please do not hesitate to contact me at (360) 750-3583 or via email at
garald.cottrell(ai)wellons.com if you have any questions.
Sincere ,
General Manager
Wellons Energy Solutions
Attachments
D
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DAQ WARO
1
Wellons Energy Solutions-Lewiston Facility
Revised Toxic Air Pollutant Modeling Analysis
11/22/10
Table 4-1.Acrolein Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m3 (m) (m)
1988 1-hour 1.41 300,307.8 4,001,659.6
1989 1.35 300,052.7 4,001,522.3
1990 1.43 300,307.8 4,001,659.6
1991 1.42 300,307.8 4,001,659.6
1992 1.42 300 307.8 4,001,659.6
Table 4-2. Arsenic Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period rn m m
1988 Annual 2.10E-04 300,204.3 4,002,124.1
1989 2.20E-04 300,052.7 4,001,522.3
1990 2.20E-04 300,204.3 4,002,124.1
1991 2.00E-04 300,052.7 4,001,522.3
1992 1.80E-04 300 052.7 4,001,522.3
Table 4-3. Benzene Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m3 m m
1988 Annual 3.97E-02 300,204.3 4,002,124.1
1989 4.13E-02 300,052.7 4,001,522.3
1990 4.15E-02 300,204.3 4,002,124.1
1991 3.90E-02 300,052.7 4,001,522.3
1992 3.47E-02 300,052.7 4,001,522.3
Table 4-4. Beryllium Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m' (m) (m
1988 Annual 1.00E-05 300,204.3 4,002,124.1
1989 1.00E-05 300,052.7 4,001,522.3
1990 1.00E-05 300,204.3 4,002,124.1
1991 1.00E-05 300,052.7 4,001,522.3
1992 1.00E-05 300 052.7 4,001 522.3
Page 1 of 4
Wellons Energy Solutions-Lewiston Facility
Revised Toxic Air Pollutant Modeling Analysis
11/22/10
Table 4-5. Cadmium Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m3 m m)
1988 Annual 4.00E-05 300,204.3 4,002,124.1
1989 4.00E-05 300,052.7 4,001,522.3
1990 4.00E-05 300,204.3 4,002,124.1
1991 4.00E-05 300,052.7 4,001,522.3
1992 3.00E-05 300 052.7 4,001,522.3
Table 4-6. Chlorine Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m3 m m
1988 1-hr 2.78E-01 300,307.8 4,001,659.6
1989 2.67E-01 300,052.7 4,001,522.3
1990 2.81E-01 300,307.8 4,001,659.6
1991 2.79E-01 300,307.8 4,001,659.6
1992 2.80E-01 300 307.8 4,001,659.6
1988 24-hr 1.05E-01 300,106.1 4,002,105.4
1989 1.26E-01 299,967.7 4,001,470.8
1990 9.63E-02 300,315.2 4,001,644.4
1991 1.14E-01 300,307.8 4,001,659.6
1992 1.26E-01 300,052.7 4,001,522.3
Table 4-7. Formaldehyde Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m3 m m
1988 1-hr 1.55 300,307.8 4,001,659.6
1989 1.49 300,052.7 4,001,522.3
1990 1.57 300,307.8 4,001,659.6
1991 1.56 300,307.8 4,001,659.6
1992 1.56 300 307.8 4,001,659.6
Page 2 of 4
Wellons Energy Solutions-Lewiston Facility
Revised Toxic Air Pollutant Modeling Analysis
11/22/10
Table 4-8. Hydrogen Chloride Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period /m3 (m) (m)
1988 1-hr 6.71 300,307.8 4,001,659.6
1989 6.44 300,052.7 4,001,522.3
1990 6.78 300,307.8 4,001,659.6
1991 6.74 300,307.8 4,001,659.6
1992 6.74 300,307.8 4,001,659.6
Table 4-9. Manganese Modeling Results
Location of Maximum
Averaging Concentration UTM-E UTM-N
Year Period m3 (m) (m)
1988 24-hr 2.13E-01 300,106.1 4,002,105.4
1989 2.55E-01 299,967.7 4,001,470.8
1990 1.95E-01 300,315.2 4,001,644.4
1991 2.31E-01 300,307.8 4,001,659.6
1992 2.54E-01 300 052.7 4,001,522.3
Page 3 of 4
Lewiston Facility
Revised Toxic Air Pollutant Modeling Analysis
11/22/10
Table 4-10. Results Comparison
Averaging Concentration AAL
Pollutant Period g/m3) (1,Wm3) %of AAL
Acrolein 1-hr 1.43 80 1.78%
Arsenic Annual 2.20E-04 2.30E-04 95.65%
Benzene Annual 0.042 0.12 34.59%
Beryllium Annual 1.00E-05 4.10E-03 0.24%
Cadmium Annual 4.00E-05 5.50E-03 0.73%
Chlorine 1-hr 0.28 900 0.03%
Chlorine 24-hr 0.13 37.5 0.34%
Formaldehyde 1-hr 1.57 150 1.04%
Hydrogen Chloride 1-hr 6.78 700 0.97%
Manganese 24-hr 0.26 31 0.82%
Page 4 of 4