# Appendix N .1

CMAQ Modeling for Reasonable

Progress and BART Controls

# CMAQ Modeling for Reasonable Progress and BART Controls

GA EPD conducted CMAQ modeling to determine th e SO2 impact on visibility from each unit

subject to analysis. This modeling was perf ormed by zeroing out the SO2 emissions from each

facility (all units) and ca lculating the impacts on visibility at each Class I area. The impacts

(Mm -1 

# ) were apportioned to each unit by calculati ng the ratio of individual SO2 emissions from

each unit to the total SO2 emissions from the f acility. A summary of these results is shown in

Table 1. Next, the modeling results were normalized by the emissions reduced from each unit to

obtain the visibility improvement resu lting from each ton of SO2 reduced (Mm -1 

# /ton). These

results are summarized in Table 2. A visibility co st efficiency metric can be calculated in dollar

per inverse megameter ($/Mm -1 

# ) by dividing the cost per t on SO2 reduction ($/ton) by the

visibility benefit per ton SO2 reduction (Mm -1 

# /ton). This visibility co st efficiency metric was

considered in addition to the standard cost efficiency expressed in $/ton.

Next, modeled visibility impacts (Mm -1 

# ) at Class I areas due to new SO2 emission limits from

controlled units (Appendix H) were calculated by multiplying the SO2 reductions (tons/year) by

the normalized SO2 modeled sensitivity (Mm -1 

# /ton) for each unit. These results are summarized

in Table 3. Finally, impacts were summed to give the total impact at ea ch Class I area. Total

impacts were used to adjust the projected 2018 visibility projections and set new 2018 visibility

goals at each Class I area.Table 1: Modeled visibility impacts (Mm-1) at Class I areas from SO2 emission reductions (tons/year) from specific units.Facility NameUnit2018 SO2COHUGRSMOKEFROMASAMASIPSWOLFGEORGIA PACIFIC CORPORATION, CEDAR SPRINR4021726.31-0.0575-0.0230-0.0067-0.0066-0.0034-0.0064-0.0039GEORGIA PACIFIC CORPORATION, CEDAR SPRINU5002428.38-0.0809-0.0323-0.0095-0.0093-0.0048-0.0090-0.0055GEORGIA PACIFIC CORPORATION, CEDAR SPRINU5012532.99-0.0844-0.0337-0.0099-0.0097-0.0050-0.0094-0.0057GEORGIA POWER COMPANY, MITCHELL STEAM-ELSG034929.74-0.0604-0.0565-0.3028-0.0399-0.1501-0.0964-0.1492GEORGIA-PACIFIC BRUNSWICK OPERATIONSF11842.37-0.0127-0.0132-0.2810-0.1466-0.0362-0.0218-0.3170GEORGIA-PACIFIC BRUNSWICK OPERATIONSM24193.01-0.0013-0.0014-0.0294-0.0154-0.0038-0.0023-0.0332GEORGIA-PACIFIC CORPSAVANNAH RIVER MILLBO011844.25-0.0034-0.0013-0.0061-0.0205-0.0020-0.0020-0.0074GEORGIA-PACIFIC CORP SAVANNAH RIVER MILLBO021415.47-0.0026-0.0010-0.0047-0.0157-0.0015-0.0015-0.0057GEORGIA-PACIFIC CORPSAVANNAH RIVER MILLBO031282.05-0.0024-0.0009-0.0043-0.0143-0.0014-0.0014-0.0052INLAND PAPERBOARD & PACKAGING, INC. -LINF21147.7-0.0590-0.0384-0.0163-0.0182-0.0133-0.0220-0.0123INLAND PAPERBOARD & PACKAGING, INC. -LINF43696.15-0.1899-0.1237-0.0526-0.0588-0.0427-0.0708-0.0397INTERNATIONAL PAPER - SAVANNAH MILLPB138578.26-0.1412-0.0595-0.5252-1.1213-0.1281-0.0951-0.5809INTERSTATE PAPER LLCF1187.68-0.0028-0.0010-0.0158-0.0261-0.0035-0.0019-0.0142JESUP MILL, RAYONIER PERFORMANCE FIBERSPB031596.95-0.0149-0.0110-0.1453-0.1506-0.0235-0.0229-0.1437JESUP MILL, RAYONIER PERFORMANCE FIBERSPB02623.85-0.0058-0.0043-0.0568-0.0588-0.0092-0.0089-0.0561JESUP MILL, RAYONIER PERFORMANCE FIBERSRF01333.28-0.0031-0.0023-0.0303-0.0314-0.0049-0.0048-0.0300JESUP MILL, RAYONIER PERFORMANCE FIBERSRF04333.87-0.0031-0.0023-0.0304-0.0315-0.0049-0.0048-0.0301PACKAGING CORPORATION OF AMERICA - VALDO1017653.35-0.0053-0.0063-0.1279-0.0299-0.0341-0.0096-0.0466SAVANNAH ELECTRIC: KRAFT STEAM - ELECTRISG01690.72-0.0110-0.0040-0.0381-0.0754-0.0088-0.0063-0.0390SAVANNAH ELECTRIC: KRAFT STEAM - ELECTRISG02703.68-0.0112-0.0041-0.0389-0.0768-0.0090-0.0064-0.0398SAVANNAH ELECTRIC: KRAFT STEAM - ELECTRISG034474.37-0.0715-0.0260-0.2470-0.4882-0.0572-0.0406-0.2528SAVANNAH ELECTRIC: MCINTOSH STEAM - ELECSG017015.13-0.1805-0.0659-0.3771-1.3139-0.1217-0.0953-0.4222SAVANNAH SUGAR REFINERYU161997.42-0.0164-0.0069-0.0611-0.1304-0.0149-0.0111-0.0675SOUTHERN STATES PHOSPHATE & FERTILIZER CSA02807.68-0.0133-0.0056-0.0494-0.1056-0.0121-0.0089-0.0547Table 2: Modeled visibility impacts (Mm-1/ton) at Class I areas from SO2 emissionreductions (tons/year) from specific units.Facility NameUnit2018 SO2COHUGRSMOKEFROMASAMASIPSWOLFGEORGIA PACIFIC CORPORATION, CEDAR SPRINR402-3.33E-05-1.33E-05-3.90E-06-3.82E-06-1.97E-06-3.72E-06-2.25E-06-3.33E-05GEORGIA PACIFIC CORPORATION, CEDAR SPRINU500-3.33E-05-1.33E-05-3.90E-06-3.82E-06-1.97E-06-3.72E-06-2.25E-06-3.33E-05GEORGIA PACIFIC CORPORATION, CEDAR SPRINU501-3.33E-05-1.33E-05-3.90E-06-3.82E-06-1.97E-06-3.72E-06-2.25E-06-3.33E-05GEORGIA POWER COMPANY, MITCHELL STEAM-ELSG03-1.23E-05-1.15E-05-6.14E-05-8.10E-06-3.05E-05-1.96E-05-3.03E-05-1.23E-05GEORGIA-PACIFIC BRUNSWICK OPERATIONSF1-6.90E-06-7.15E-06-1.53E-04-7.96E-05-1.97E-05-1.18E-05-1.72E-04-6.90E-06GEORGIA-PACIFIC BRUNSWICK OPERATIONSM24-6.90E-06-7.15E-06-1.53E-04-7.96E-05-1.97E-05-1.18E-05-1.72E-04-6.90E-06GEORGIA-PACIFIC CORPSAVANNAH RIVER MILLBO01-1.85E-06-6.89E-07-3.32E-06-1.11E-05-1.07E-06-1.08E-06-4.04E-06-1.85E-06GEORGIA-PACIFIC CORPSAVANNAH RIVER MILLBO02-1.85E-06-6.89E-07-3.32E-06-1.11E-05-1.07E-06-1.08E-06-4.04E-06-1.85E-06GEORGIA-PACIFIC CORPSAVANNAH RIVER MILLBO03-1.85E-06-6.89E-07-3.32E-06-1.11E-05-1.07E-06-1.08E-06-4.04E-06-1.85E-06INLAND PAPERBOARD & PACKAGING, INC. -LINF2-5.14E-05-3.35E-05-1.42E-05-1.59E-05-1.16E-05-1.91E-05-1.08E-05-5.14E-05INLAND PAPERBOARD & PACKAGING, INC. -LINF4-5.14E-05-3.35E-05-1.42E-05-1.59E-05-1.16E-05-1.91E-05-1.08E-05-5.14E-05INTERNATIONAL PAPER - SAVANNAH MILLPB13-1.65E-05-6.93E-06-6.12E-05-1.31E-04-1.49E-05-1.11E-05-6.77E-05-1.65E-05INTERSTATE PAPER LLCF1-1.49E-05-5.40E-06-8.41E-05-1.39E-04-1.89E-05-1.03E-05-7.55E-05-1.49E-05JESUP MILL, RAYONIER PERFORMANCE FIBERSPB03-9.31E-06-6.90E-06-9.10E-05-9.43E-05-1.47E-05-1.43E-05-9.00E-05-9.31E-06JESUP MILL, RAYONIER PERFORMANCE FIBERSPB02-9.31E-06-6.90E-06-9.10E-05-9.43E-05-1.47E-05-1.43E-05-9.00E-05-9.31E-06JESUP MILL, RAYONIER PERFORMANCE FIBERSRF01-9.31E-06-6.90E-06-9.10E-05-9.43E-05-1.47E-05-1.43E-05-9.00E-05-9.31E-06JESUP MILL, RAYONIER PERFORMANCE FIBERSRF04-9.31E-06-6.90E-06-9.10E-05-9.43E-05-1.47E-05-1.43E-05-9.00E-05-9.31E-06PACKAGING CORPORATION OF AMERICA - VALDO1017-8.14E-06-9.63E-06-1.96E-04-4.57E-05-5.22E-05-1.47E-05-7.14E-05-8.14E-06SAVANNAH ELECTRIC: KRAFT STEAM - ELECTRISG01-1.60E-05-5.81E-06-5.52E-05-1.09E-04-1.28E-05-9.07E-06-5.65E-05-1.60E-05SAVANNAH ELECTRIC: KRAFT STEAM - ELECTRISG02-1.60E-05-5.81E-06-5.52E-05-1.09E-04-1.28E-05-9.07E-06-5.65E-05-1.60E-05SAVANNAH ELECTRIC: KRAFT STEAM - ELECTRISG03-1.60E-05-5.81E-06-5.52E-05-1.09E-04-1.28E-05-9.07E-06-5.65E-05-1.60E-05SAVANNAH ELECTRIC: MCINTOSH STEAM - ELECSG01-2.57E-05-9.39E-06-5.38E-05-1.87E-04-1.73E-05-1.36E-05-6.02E-05-2.57E-05SAVANNAH SUGAR REFINERYU161-1.65E-05-6.93E-06-6.12E-05-1.31E-04-1.49E-05-1.11E-05-6.77E-05-1.65E-05SOUTHERN STATES PHOSPHATE & FERTILIZER CSA02-1.65E-05-6.93E-06-6.12E-05-1.31E-04-1.49E-05-1.11E-05-6.77E-05-1.65E-05Table 3: Modeled visibility impacts (Mm-1) at Class I areas from new SO2 emissionlimits (tons/year) from controlled units.Facility NameUnitSO2 LimitCOHUGRSMOKEFROMASAMASIPSWOLFGEORGIA PACIFIC CORPORATION, CEDAR SPRINU500591-0.0612-0.0245-0.0072-0.0070-0.0036-0.0068-0.0041GEORGIA PACIFIC CORPORATION, CEDAR SPRINU501591-0.0647-0.0258-0.0076-0.0074-0.0038-0.0072-0.0044GEORGIA-PACIFIC BRUNSWICK OPERATIONSF1568-0.0088-0.0091-0.1944-0.1014-0.0250-0.0151-0.2192INTERNATIONAL PAPER - SAVANNAH MILLPB136578-0.0329-0.0139-0.1225-0.2615-0.0299-0.0222-0.1355INTERSTATE PAPER LLCF12-0.0028-0.0010-0.0156-0.0258-0.0035-0.0019-0.0140JESUP MILL, RAYONIER PERFORMANCE FIBERSPB03149-0.0135-0.0100-0.1317-0.1365-0.0213-0.0207-0.1303JESUP MILL, RAYONIER PERFORMANCE FIBERSPB02318-0.0028-0.0021-0.0278-0.0288-0.0045-0.0044-0.0275JESUP MILL, RAYONIER PERFORMANCE FIBERSRF01194-0.0013-0.0010-0.0127-0.0131-0.0020-0.0020-0.0125JESUP MILL, RAYONIER PERFORMANCE FIBERSRF04307-0.0003-0.0002-0.0024-0.0025-0.0004-0.0004-0.0024PACKAGING CORPORATION OF AMERICA - VALDO1017600-0.0004-0.0005-0.0104-0.0024-0.0028-0.0008-0.0038SOUTHERN STATES PHOSPHATE & FERTILIZER CSA02600-0.0034-0.0014-0.0127-0.0271-0.0031-0.0023-0.0141TOTAL IMPACT-0.1922-0.0895-0.5450-0.6138-0.1000-0.0838-0.5679