Eramet EF

**Control Efficiency and Fugitive Capture**

**Assumptions Baseline**  **Enhanced Local Capture**  **Building**

**Ventilation** Baghouse Control Efficiency (PM, metals) 0.98 0.98 0.98 Baghouse Control Efficiency (organics) 0.5 0.5 0.5 Scrubber Control Efficiency (PM, metals) 0.9 0.9 0.9 Scrubber Control Efficiency (organics) 0.5 0.5 0.5 Scrubber/Baghouse Control Efficiency (Hg) 0.15 0.15 0.15 Scrubber Control Efficiency (HCl, HF, Form) 0.9 0.9 0.9 EAF #1 Furnace Capture Efficiency 0.98 0.98 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". EAF #12 Furnace Capture Efficiency 0.98 0.98 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". MOR Furnace Capture Efficiency 0.98 0.98 0.99 EAF #1 Tapping Capture Efficiency 0.2 0.95 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". EAF #12 Tapping Capture Efficiency 0.3 0.95 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". MOR Pouring Capture Efficiency 0.4 0.8 0.99 Crushing Capture Efficiency 0.95 0.95 0.99 EAF #1 Casting Capture Efficiency N/A 0.95 0.99 EAF #12 Casting Capture Efficiency N/A 0.95 0.99 MOR Casting Capture Efficiency 0.4 0.8 0.99 MOR Secondary Capture Efficiency N/A 0.75 N/A Mn Fraction (Crushing) 0.41 0.41 0.41 Mn Fraction (Tapping) 0.41 0.41 0.41 Mn Fraction (MOR, Casting) 0.41 0.41 0.41

Unit Description Pollutant Description Baseline (tpy) Enhanced Capture (tpy) Building

Ventilation (tpy) Final Baseline (tpy) Baseline Description Enhanced Local Capture Description Building Ventilation Description Final Baseline Description Electric Arc Furnace #1 Baghouse Outlet Arsenic 0.00039858 0.000553519 0.00039858 0.00039858Based on 3/2013 stack test Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test Electric Arc Furnace #1 Baghouse Outlet Cadmium 0.00231264 0.002649882 0.00231264 0.00231264Based on 3/2013 stack test Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test Electric Arc Furnace #1 Baghouse Outlet Chromium 0.0009198 0.001967708 0.0009198 0.0009198Based on 3/2013 stack test Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test Electric Arc Furnace #1 Baghouse Outlet Lead 0.02215842 0.035735698 0.02215842 0.02215842Average of 7/2012, 3/2013 stack tests Added tapping bh and increased capture tapping fugitives No change from baseline Average of 7/2012, 3/2013 stack tests Electric Arc Furnace #1 Baghouse Outlet Manganese 1.32770721 2.107803825 1.32770721 1.32770721SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013) @ 50% Added tapping bh and increased capture tapping fugitives No change from baseline SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013) @ 50% Electric Arc Furnace #1 Baghouse Outlet Mercury 0.11913162 0.119438406 0.11913162 0.07800342SiMn (7/2012) @ 50%, FeMn (3/2013,10/2014) @ 50% Added tapping bh and increased capture tapping fugitives No change from baseline SiMn (7/2012) @ 50%, FeMn (3/2013) @ 50% Electric Arc Furnace #1 Baghouse Outlet Nickel 0.00315798 0.004805383 0.00315798 0.00315798Based on 3/2013 stack test Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test Electric Arc Furnace #1 Baghouse Outlet Chromium (VI) 0.000259278 0.000454336 0.000259278 0.000259278Calc using Cr+6/PM ratio from EAF 12 Added tapping bh and increased capture tapping fugitives No change from baseline Calc using Cr+6/PM ratio from EAF 12 Electric Arc Furnace #1 Baghouse Outlet PM Filterable 8.88319845 15.5661258 8.88319845 8.88319845SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013,3/2014) @ 50%Added tapping bh and increased capture tapping fugitives No change from baseline SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013,3/2014) @ 50% Electric Arc Furnace #1 Baghouse Outlet Hydrochloric Acid 0.66073176 4.970054891 0.66073176 0.66073176Average of 5/2011, 7/2012, 3/2013 stack tests Added tapping bh and increased capture tapping fugitives No change from baseline Average of 5/2011, 7/2012, 3/2013 stack tests Electric Arc Furnace #1 Baghouse Outlet Hydrogen Fluoride 1.58994 12.52383954 1.58994 1.58994Based on 5/2011 stack test Added tapping bh and increased capture tapping fugitives No change from baseline Based on 5/2011 stack test Electric Arc Furnace #1 Baghouse Outlet Naphthalene 0.29972121 0.379807512 0.29972121 0.29927664FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 2-Methylnaphthalene 0.05881902 0.10733712 0.05881902 0.04218816FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Acenaphthylene 0.13138686 0.170552389 0.13138686 0.21179928FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Acenaphthene 0.02285046 0.041869974 0.02285046 0.02493096FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Fluorene 0.04647399 0.068349051 0.04647399 0.02240808FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Phenanthrene 0.964301895 1.038546115 0.964301895 0.60595986FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Anthracene 0.138041175 0.152659479 0.138041175 0.08820006FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Fluoranthene 1.88789169 1.902352808 1.88789169 0.55878288FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Pyrene 1.376459895 1.387620106 1.376459895 0.43255566FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Benzo(a)anthracene 0.22453194 0.225737033 0.22453194 0.06934416FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Chrysene 0.49277847 0.494821889 0.49277847 0.20076168FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Benzo(b)fluoranthene 0.18126192 0.182257432 0.18126192 0.06728556FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Benzo(k)fluoranthene 0.05593041 0.056428166 0.05593041 0.01755504FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Benzo(e)pyrene 0.08590275 0.087212634 0.08590275 0.0938634FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Benzo(a)pyrene 0.030838485 0.031205252 0.030838485 0.00969294FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Perylene 0.005009625 0.00506202 0.005009625 0.00096798FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Indeno(1,2,3-cd)pyrene 0.010806555 0.011042334 0.010806555 0.00132714FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Dibenz(a,h)anthracene 0.00167097 0.001749563 0.00167097 0.00032412FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Benzo(g,h,i)perylene 0.008314335 0.008864486 0.008314335 0.00202794FeMn (3/2013,10/2014), SiMn data from Furnace 12 Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Formaldehyde 0.33753594 0.7554616 0.33753594 0.33753594Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 2,3,7,8-Tetrachlorodibenzo-p-dioxin 2.21628E-09 5.91015E-09 2.21628E-09 2.21628E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.76514E-09 6.82129E-09 1.76514E-09 1.76514E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.45854E-09 4.89044E-09 1.45854E-09 1.45854E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.40598E-09 4.73309E-09 1.40598E-09 1.40598E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.44102E-09 4.82052E-09 1.44102E-09 1.44102E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.96224E-09 8.24968E-09 1.96224E-09 1.96224E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 5.475E-09 5.76084E-08 5.475E-09 5.475E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 2,3,7,8-Tetrachlorodibenzofuran 2.7156E-09 8.11232E-09 2.7156E-09 2.7156E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,7,8-Pentachlorodibenzofuran 1.27896E-09 5.3396E-09 1.27896E-09 1.27896E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 2,3,4,7,8-Pentachlorodibenzofuran 1.16946E-09 7.58789E-09 1.16946E-09 1.16946E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,7,8-Hexachlorodibenzofuran 1.52424E-09 5.55868E-09 1.52424E-09 1.52424E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,6,7,8-Hexachlorodibenzofuran 1.07748E-09 4.195E-09 1.07748E-09 1.07748E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 2,3,4,6,7,8-Hexachlorodibenzofuran 1.16946E-09 5.85884E-09 1.16946E-09 1.16946E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,7,8,9-Hexachlorodibenzofuran 1.41912E-09 5.11299E-09 1.41912E-09 1.41912E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.18698E-09 1.03562E-08 1.18698E-09 1.18698E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.74324E-09 5.17514E-09 1.74324E-09 1.74324E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 4.4676E-09 1.3663E-08 4.4676E-09 4.4676E-09Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Baghouse Outlet Polychlorinated biphenyls 5.19987E-07 1.79904E-06 5.19987E-07 5.19987E-07Based on 3/2013 stack test data Added tapping bh and increased capture tapping fugitives No change from baseline Based on 3/2013 stack test data

Electric Arc Furnace #12 Scrubber Outlet Arsenic 0.0035259 0.003243828 0.0035259 0.0035259Based on 8/2010, 3/2013 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Cadmium 0.02829042 0.026027186 0.02829042 0.02829042Based on 3/2013 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Chromium 0.0027813 0.002558796 0.0027813 0.0027813 Based on 8/2010, 3/2013 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Lead 0.10571568 0.097258426 0.10571568 0.10571568Average of 8/2010, 7/2012, 3/2013 stack tests Moved tapping emissions to tapping and casting baghouse No change from baseline Average of 8/2010, 7/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Manganese 6.875151315 6.32513921 6.875151315 6.875151315 FeMn (8/2010, 7/2012) @ 50%, SiMn (3/2013) @ 50% Moved tapping emissions to tapping and casting baghouse No change from baseline FeMn (8/2010, 7/2012) @ 50%, SiMn (3/2013) @ 50% Electric Arc Furnace #12 Scrubber Outlet Mercury 0.08291121 0.076278313 0.02926278 0.07817862FeMn (8/2010,7/2012,10/2012) @ 50%, SiMn (3/2013,10/2014) @ 50% Added 70% brominated carbon injection Added 70% brominated carbon injection FeMn (8/2010, 7/2012,10/2012) @ 50%, SiMn (3/2013) @ 50% Electric Arc Furnace #12 Scrubber Outlet Nickel 0.00233673 0.002149792 0.00233673 0.00233673 Based on 8/2010, 3/2013 stack tests Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Chromium (VI) 0.00120012 0.00110411 0.00120012 0.00120012Based on 8/2010 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet PM Filterable 41.1176442 37.82823266 41.1176442 41.1176442FeMn (8/2010, 7/2012) @ 50%, SiMn (3/2013,3/2014) @ 50%Moved tapping emissions to tapping and casting baghouse No change from baseline FeMn (8/2010, 7/2012) @ 50%, SiMn (3/2013,3/2014) @ 50% Electric Arc Furnace #12 Scrubber Outlet Hydrochloric Acid 0.54507348 0.501467602 0.54507348 0.54507348Based on 8/2010, 7/2012, 3/2013 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012, 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Hydrogen Fluoride 0.32892048 0.302606842 0.32892048 0.32892048Based on 8/2010 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet Naphthalene 1.16927385 1.075731942 1.16927385 1.5426944FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet 2-Methylnaphthalene 0.4508991 0.414827172 0.4508991 0.5940156FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Acenaphthylene 0.3743367 0.344389764 0.3743367 0.4936114FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Acenaphthene 0.07712085 0.070951182 0.07712085 0.1019372 FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Fluorene 0.1670532 0.153688944 0.1670532 0.221409FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Phenanthrene 1.9663353 1.809028476 1.9663353 2.6026544FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Anthracene 0.1340061 0.123285612 0.1340061 0.174835 FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Fluoranthene 0.8371932 0.770217744 0.8371932 1.101059FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Pyrene 0.5415213 0.498199596 0.5415213 0.7109762 FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Benzo(a)anthracene 0.0040515 0.00372738 0.0040515 0.0038106FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Chrysene 0.01735575 0.01596729 0.01735575 0.0185274FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Benzo(b)fluoranthene 0.0152424 0.014023008 0.0152424 0.018104FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Benzo(k)fluoranthene 0.0056721 0.005218332 0.0056721 0.0066138FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Benzo(e)pyrene 0.01032585 0.009499782 0.01032585 0.0126728FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Benzo(a)pyrene 0.00285795 0.002629314 0.00285795 0.0035332 FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Perylene 0.0003942 0.000362664 0.0003942 0.0004818FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Indeno(1,2,3-cd)pyrene 0.00371205 0.003415086 0.00371205 0.0044822 FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Dibenz(a,h)anthracene 0.0010074 0.000926808 0.0010074 0.001241FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Benzo(g,h,i)perylene 0.0043143 0.003969156 0.0043143 0.0054166FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 10/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Formaldehyde 0.14471739 0.133139999 0.14471739 0.14471739Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.31838E-09 1.21291E-09 1.31838E-09 1.31838E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.47168E-09 1.35395E-09 1.47168E-09 1.47168E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.26801E-09 1.16657E-09 1.26801E-09 1.26801E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.28334E-09 1.18067E-09 1.28334E-09 1.28334E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.75638E-09 1.61587E-09 1.75638E-09 1.75638E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 4.15443E-09 3.82208E-09 4.15443E-09 4.15443E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 5.86263E-08 5.39362E-08 5.86263E-08 5.86263E-08Based on 8/2010 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,7,8-Tetrachlorodibenzofuran 1.70382E-09 1.56751E-09 1.70382E-09 1.70382E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8-Pentachlorodibenzofuran 1.25268E-09 1.15247E-09 1.25268E-09 1.25268E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,4,7,8-Pentachlorodibenzofuran 1.56804E-09 1.4426E-09 1.56804E-09 1.56804E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,7,8-Hexachlorodibenzofuran 1.13442E-09 1.04367E-09 1.13442E-09 1.13442E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,6,7,8-Hexachlorodibenzofuran 9.7455E-10 8.96586E-10 9.7455E-10 9.7455E-10Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,4,6,7,8-Hexachlorodibenzofuran 1.06215E-09 9.77178E-10 1.06215E-09 1.06215E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8,9-Hexachlorodibenzofuran 1.23516E-09 1.13635E-09 1.23516E-09 1.23516E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.51548E-09 1.39424E-09 1.51548E-09 1.51548E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.47825E-09 1.35999E-09 1.47825E-09 1.47825E-09Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 3.03096E-09 2.78848E-09 3.03096E-09 3.03096E-09Based on 8/2010 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet Polychlorinated biphenyls 3.6283E-07 3.33804E-07 3.6283E-07 3.6283E-07Based on 8/2010, 7/2012 stack test Moved tapping emissions to tapping and casting baghouse No change from baseline Based on 8/2010, 7/2012 stack test

MOR Process Baghouse Outlet Arsenic 0.00109938 0.00122904 0.00109938 0.00109938Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Cadmium 0.001980808 0.002214422 0.001980808 0.001980808Based on Cd/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on Cd/PM ratio from EAF 12 MOR Process Baghouse Outlet Chromium 0.00434058 0.004852503 0.00434058 0.00434058Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Lead 0.00093294 0.00104297 0.00093294 0.00093294Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Manganese 0.98232012 1.121530536 0.98232012 0.98232012Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Mercury 0.00211554 0.002193282 0.00211554 0.00211554Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Nickel 0.0014673 0.001640352 0.0014673 0.0014673 Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Chromium (VI) 8.40287E-05 9.39389E-05 8.40287E-05 8.40287E-05 Based on Cr+6/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on Cr+6/PM ratio from EAF 12 MOR Process Baghouse Outlet PM Filterable 2.8789302 3.2184678 2.8789302 2.8789302 Based on results from 8/2010 ICR stack test Added increased capture MOR fugitives No change from baseline Based on results from 8/2010 ICR stack test MOR Process Baghouse Outlet Hydrochloric Acid 0.038164358 0.263217307 0.038164358 0.038164358Based on HCl/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on HCl/PM ratio from EAF 12 MOR Process Baghouse Outlet Hydrogen Fluoride 0.023029994 0.158836498 0.023029994 0.023029994Based on HF/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on HF/PM ratio from EAF 12 MOR Process Baghouse Outlet Naphthalene 0.081868936 0.102264691 0.081868936 0.108014688Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet 2-Methylnaphthalene 0.03157056 0.04392677 0.03157056 0.041591134Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Acenaphthylene 0.026209897 0.036184268 0.026209897 0.034561143 Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Acenaphthene 0.005399763 0.010243505 0.005399763 0.007137327Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Fluorene 0.011696548 0.017267518 0.011696548 0.015502373 Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Phenanthrene 0.137676712 0.156584651 0.137676712 0.182229807Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Anthracene 0.009382692 0.013105568 0.009382692 0.012241406Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Fluoranthene 0.058617677 0.062300522 0.058617677 0.077092744Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Pyrene 0.037915646 0.040757841 0.037915646 0.049780353 Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12

Page 1 of 6Eramet EF

MOR Process Baghouse Outlet Benzo(a)anthracene 0.000283673 0.000590577 0.000283673 0.000266806Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Chrysene 0.001215196 0.001735598 0.001215196 0.001297231Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Benzo(b)fluoranthene 0.001067226 0.001320755 0.001067226 0.001267586Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Benzo(k)fluoranthene 0.000397143 0.000523907 0.000397143 0.000463078Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Benzo(e)pyrene 0.000722984 0.001056575 0.000722984 0.00088731Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Benzo(a)pyrene 0.000200105 0.00029351 0.000200105 0.000247384Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Perylene 2.76007E-05 4.09443E-05 2.76007E-05 3.37341E-05 Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Indeno(1,2,3-cd)pyrene 0.000259906 0.000319953 0.000259906 0.00031383 Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Dibenz(a,h)anthracene 7.0535E-05 9.05505E-05 7.0535E-05 8.6891E-05 Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Benzo(g,h,i)perylene 0.000302074 0.000442182 0.000302074 0.000379254Based on PAH/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on PAH/PM ratio from EAF 12 MOR Process Baghouse Outlet Formaldehyde 0.010132664 0.126275709 0.010132664 0.010132664Based on HCHO/PM ratio from EAF 12 Added increased capture MOR fugitives No change from baseline Based on HCHO/PM ratio from EAF 12

C2P Crushing/Sizing Baghouse #1 Arsenic 0.00013286 0.00013286 0.00013286 0.00013286Based on 8/2010 stack test, limited to 5840 hr/yr by permit No change from baseline No change from baseline Based on 8/2010 stack test, limited to 5840 hr/yr by permit C2P Crushing/Sizing Baghouse #1 Chromium 0.00140452 0.00140452 0.00140452 0.00140452Based on 8/2010 stack test, limited to 5840 hr/yr by permit No change from baseline No change from baseline Based on 8/2010 stack test, limited to 5840 hr/yr by permit C2P Crushing/Sizing Baghouse #1 Lead 0.000141328 0.000141328 0.000141328 0.000141328Based on 8/2010 stack test, limited to 5840 hr/yr by permit No change from baseline No change from baseline Based on 8/2010 stack test, limited to 5840 hr/yr by permit C2P Crushing/Sizing Baghouse #1 Manganese 1.48530764 1.48530764 1.48530764 1.48530764Based on 8/2010 stack test, limited to 5840 hr/yr by permit No change from baseline No change from baseline Based on 8/2010 stack test, limited to 5840 hr/yr by permit C2P Crushing/Sizing Baghouse #1 Nickel 0.00151256 0.00151256 0.00151256 0.00151256Based on 8/2010 stack test, limited to 5840 hr/yr by permit No change from baseline No change from baseline Based on 8/2010 stack test, limited to 5840 hr/yr by permit C2P Crushing/Sizing Baghouse #1 Chromium (VI) 0.000105963 0.000105963 0.000105963 0.000105963 Based on Cr+6/PM ratio from EAF 12 No change from baseline No change from baseline Based on Cr+6/PM ratio from EAF 12 C2P Crushing/Sizing Baghouse #1 PM Filterable 3.630436 3.630436 3.630436 3.630436Based on 8/2010 stack test, limited to 5840 hr/yr by permit No change from baseline No change from baseline Based on 8/2010 stack test, limited to 5840 hr/yr by permit

C2P Crushing/Sizing Baghouse #2 Arsenic 0.00013286 0.00013286 0.00013286 0.00013286Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #2 Chromium 0.00140452 0.00140452 0.00140452 0.00140452Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #2 Lead 0.000141328 0.000141328 0.000141328 0.000141328Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #2 Manganese 1.48530764 1.48530764 1.48530764 1.48530764Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #2 Nickel 0.00151256 0.00151256 0.00151256 0.00151256Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #2 Chromium (VI) 0.000105963 0.000105963 0.000105963 0.000105963Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #2 PM Filterable 3.630436 3.630436 3.630436 3.630436Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1

C2P Crushing/Sizing Baghouse #3 Arsenic 0.00013286 0.00013286 0.00013286 0.00013286Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #3 Chromium 0.00140452 0.00140452 0.00140452 0.00140452Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #3 Lead 0.000141328 0.000141328 0.000141328 0.000141328Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #3 Manganese 1.48530764 1.48530764 1.48530764 1.48530764Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #3 Nickel 0.00151256 0.00151256 0.00151256 0.00151256Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #3 Chromium (VI) 0.000105963 0.000105963 0.000105963 0.000105963Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1 C2P Crushing/Sizing Baghouse #3 PM Filterable 3.630436 3.630436 3.630436 3.630436Assumed emissions the same as C2P Baghouse #1 No change from baseline No change from baseline Assumed emissions the same as C2P Baghouse #1

Electric Arc Furnace #1 Fugitives Arsenic 0.000374177 0.000374177 3.74177E-06 0.000374177Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Cadmium 0.00217105 0.00217105 2.17105E-05 0.00217105 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Chromium 0.000863486 0.000863486 8.63486E-06 0.000863486Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Lead 0.020801782 0.020801782 0.000208018 0.020801782 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Manganese 1.246419013 1.246419013 0.01246419 1.246419013 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Mercury 0.002628189 0.002628189 2.62819E-05 0.001720851Calculated using Hg/PM and control device ratio No change from baseline Assumes building capture of 99% Calculated using Hg/PM and control device ratio Electric Arc Furnace #1 Fugitives Nickel 0.002964634 0.002964634 2.96463E-05 0.002964634Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Chromium (VI) 0.000243404 0.000243404 2.43404E-06 0.000243404Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives PM Filterable 8.339329157 8.339329157 0.083393292 8.339329157Calculated using mass balance approach No change from baseline Assumes building capture of 99% Calculated using mass balance approach Electric Arc Furnace #1 Fugitives Hydrochloric Acid 0.620278795 0.620278795 0.006202788 0.620278795 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Hydrogen Fluoride 1.492596735 1.492596735 0.014925967 1.492596735 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Naphthalene 0.281370932 0.281370932 0.002813709 0.28095358Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 2-Methylnaphthalene 0.055217856 0.055217856 0.000552179 0.039605211Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Acenaphthylene 0.123342767 0.123342767 0.001233428 0.198831977Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Acenaphthene 0.021451452 0.021451452 0.000214515 0.023404575 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Fluorene 0.043628644 0.043628644 0.000436286 0.021036157Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Phenanthrene 0.905263003 0.905263003 0.00905263 0.568860277Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Anthracene 0.129589674 0.129589674 0.001295897 0.082800056Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Fluoranthene 1.772306484 1.772306484 0.017723065 0.524571683 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Pyrene 1.29218684 1.29218684 0.012921868 0.40607266Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Benzo(a)anthracene 0.210785087 0.210785087 0.002107851 0.065098599Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Chrysene 0.46260836 0.46260836 0.004626084 0.188470149Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Benzo(b)fluoranthene 0.170164251 0.170164251 0.001701643 0.063166036Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Benzo(k)fluoranthene 0.052506099 0.052506099 0.000525061 0.016480242 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Benzo(e)pyrene 0.080643398 0.080643398 0.000806434 0.088116661Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Benzo(a)pyrene 0.028950414 0.028950414 0.000289504 0.009099495 Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Perylene 0.004702913 0.004702913 4.70291E-05 0.000908716Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Indeno(1,2,3-cd)pyrene 0.010144929 0.010144929 0.000101449 0.001245887Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Dibenz(a,h)anthracene 0.001568666 0.001568666 1.56867E-05 0.000304276Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Benzo(g,h,i)perylene 0.007805294 0.007805294 7.80529E-05 0.00190378Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Formaldehyde 0.316870474 0.316870474 0.003168705 0.316870474Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 2,3,7,8-Tetrachlorodibenzo-p-dioxin 2.08059E-09 2.08059E-09 2.08059E-11 2.08059E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.65707E-09 1.65707E-09 1.65707E-11 1.65707E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.36924E-09 1.36924E-09 1.36924E-11 1.36924E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.3199E-09 1.3199E-09 1.3199E-11 1.3199E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.35279E-09 1.35279E-09 1.35279E-11 1.35279E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.8421E-09 1.8421E-09 1.8421E-11 1.8421E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 5.1398E-09 5.1398E-09 5.1398E-11 5.1398E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 2,3,7,8-Tetrachlorodibenzofuran 2.54934E-09 2.54934E-09 2.54934E-11 2.54934E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,7,8-Pentachlorodibenzofuran 1.20066E-09 1.20066E-09 1.20066E-11 1.20066E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 2,3,4,7,8-Pentachlorodibenzofuran 1.09786E-09 1.09786E-09 1.09786E-11 1.09786E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,7,8-Hexachlorodibenzofuran 1.43092E-09 1.43092E-09 1.43092E-11 1.43092E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,6,7,8-Hexachlorodibenzofuran 1.01151E-09 1.01151E-09 1.01151E-11 1.01151E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 2,3,4,6,7,8-Hexachlorodibenzofuran 1.09786E-09 1.09786E-09 1.09786E-11 1.09786E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,7,8,9-Hexachlorodibenzofuran 1.33224E-09 1.33224E-09 1.33224E-11 1.33224E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.11431E-09 1.11431E-09 1.11431E-11 1.11431E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.63651E-09 1.63651E-09 1.63651E-11 1.63651E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 4.19407E-09 4.19407E-09 4.19407E-11 4.19407E-09Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Fugitives Polychlorinated biphenyls 4.88151E-07 4.88151E-07 4.88151E-09 4.88151E-07Based on PM and pollutant/PM ratio from Furnace 1 No change from baseline Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1

Electric Arc Furnace #1 Tapping Fugitives Arsenic 0.002657033 0.000166065 2.65703E-05 0.002657033 Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Cadmium 0.015416631 0.000963539 0.000154166 0.015416631Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Chromium 0.006131615 0.000383226 6.13161E-05 0.006131615 Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Lead 0.147713513 0.009232095 0.001477135 0.147713513 Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Manganese 24.279216 1.517451 0.24279216 24.279216Assumed 41% Mn content for tapping Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Assumed 41% Mn content for tapping Electric Arc Furnace #1 Tapping Fugitives Mercury 0.000319029 1.99393E-05 3.19029E-06 0.000319029Used 50/50 Hg Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used 50/50 Hg Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Nickel 0.021051876 0.001315742 0.000210519 0.021051876Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Chromium (VI) 0.001728412 0.000108026 1.72841E-05 0.001728412 Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives PM Filterable 59.2176 3.7011 0.592176 59.2176Used 1.3 lb/ton, 13 tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used 1.3 lb/ton, 13 tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Hydrochloric Acid 4.404601483 0.275287593 0.044046015 4.404601483 Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Hydrogen Fluoride 10.59893365 0.662433353 0.105989336 10.59893365 Based on PM and pollutant/PM ratio from Furnace 1 Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Based on PM and pollutant/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Fugitives Naphthalene 0.142286169 0.008892886 0.001422862 0.142286169Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 2-Methylnaphthalene 0.086200192 0.005387512 0.000862002 0.086200192Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Acenaphthylene 0.069583848 0.00434899 0.000695838 0.069583848Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Acenaphthene 0.03379122 0.002111951 0.000337912 0.03379122Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Fluorene 0.038864557 0.002429035 0.000388646 0.038864557Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Phenanthrene 0.131906773 0.008244173 0.001319068 0.131906773 Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Anthracene 0.025971764 0.001623235 0.000259718 0.025971764Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Fluoranthene 0.025692498 0.001605781 0.000256925 0.025692498Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Pyrene 0.019827906 0.001239244 0.000198279 0.019827906Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Benzo(a)anthracene 0.002141041 0.000133815 2.14104E-05 0.002141041Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Chrysene 0.003630462 0.000226904 3.63046E-05 0.003630462Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Benzo(b)fluoranthene 0.001768686 0.000110543 1.76869E-05 0.001768686Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Benzo(k)fluoranthene 0.000884343 5.52715E-05 8.84343E-06 0.000884343 Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Benzo(e)pyrene 0.002327219 0.000145451 2.32722E-05 0.002327219Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Benzo(a)pyrene 0.000651621 4.07263E-05 6.51621E-06 0.000651621Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Perylene 9.30888E-05 5.81805E-06 9.30888E-07 9.30888E-05 Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Indeno(1,2,3-cd)pyrene 0.000418899 2.61812E-05 4.18899E-06 0.000418899Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Dibenz(a,h)anthracene 0.000139633 8.72707E-06 1.39633E-06 0.000139633 Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Benzo(g,h,i)perylene 0.000977432 6.10895E-05 9.77432E-06 0.000977432Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Formaldehyde 0.405122283 0.025320143 0.004051223 0.405122283 Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 2,3,7,8-Tetrachlorodibenzo-p-dioxin 6.56276E-09 4.10172E-10 6.56276E-11 6.56276E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,7,8-Pentachlorodibenzo-dioxin 8.98307E-09 5.61442E-10 8.98307E-11 8.98307E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 6.09731E-09 3.81082E-10 6.09731E-11 6.09731E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 5.91114E-09 3.69446E-10 5.91114E-11 5.91114E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 6.00423E-09 3.75264E-10 6.00423E-11 6.00423E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.11707E-08 6.98166E-10 1.11707E-10 1.11707E-08Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 9.26233E-08 5.78896E-09 9.26233E-10 9.26233E-08Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 2,3,7,8-Tetrachlorodibenzofuran 9.58814E-09 5.99259E-10 9.58814E-11 9.58814E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,7,8-Pentachlorodibenzofuran 7.21438E-09 4.50899E-10 7.21438E-11 7.21438E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 2,3,4,7,8-Pentachlorodibenzofuran 1.14034E-08 7.12711E-10 1.14034E-10 1.14034E-08Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,7,8-Hexachlorodibenzofuran 7.16783E-09 4.4799E-10 7.16783E-11 7.16783E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,6,7,8-Hexachlorodibenzofuran 5.53878E-09 3.46174E-10 5.53878E-11 5.53878E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 2,3,4,6,7,8-Hexachlorodibenzofuran 8.33144E-09 5.20715E-10 8.33144E-11 8.33144E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,7,8,9-Hexachlorodibenzofuran 6.56276E-09 4.10172E-10 6.56276E-11 6.56276E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.62905E-08 1.01816E-09 1.62905E-10 1.62905E-08Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,7,8,9-Heptachlorodibenzofuran 6.09731E-09 3.81082E-10 6.09731E-11 6.09731E-09Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.63371E-08 1.02107E-09 1.63371E-10 1.63371E-08Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture Electric Arc Furnace #1 Tapping Fugitives Polychlorinated biphenyls 2.27244E-06 1.42027E-07 2.27244E-08 2.27244E-06Used Org HAP Tap EF, 13 Tons/hr and 20% capture Calculated using a tapping capture of 95% The tapping fugitives are included in the EAF #1 fugitives Used Org HAP Tap EF, 13 Tons/hr and 20% capture

Electric Arc Furnace #12 Fugitives Arsenic 0.000662006 0.000662006 6.62006E-06 0.000662006Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Cadmium 0.005311671 0.005311671 5.31167E-05 0.005311671Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Chromium 0.000522203 0.000522203 5.22203E-06 0.000522203 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Lead 0.019848658 0.019848658 0.000198487 0.019848658Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Manganese 1.290844737 1.290844737 0.012908447 1.290844737Used assumed Mn fraction and 100% FeMn production Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used assumed Mn fraction and 100% FeMn production Electric Arc Furnace #12 Fugitives Mercury 0.00183068 0.00183068 1.83068E-05 0.001726184Calculated using Hg/PM and control device ratio Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Calculated using Hg/PM and control device ratio

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Electric Arc Furnace #12 Fugitives Nickel 0.000438733 0.000438733 4.38733E-06 0.000438733 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Chromium (VI) 0.000225329 0.000225329 2.25329E-06 0.000225329Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives PM Filterable 7.720047482 7.720047482 0.077200475 7.720047482Calculated using mass balance approach Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Calculated using mass balance approach Electric Arc Furnace #12 Fugitives Hydrochloric Acid 0.102340327 0.102340327 0.001023403 0.102340327Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Hydrogen Fluoride 0.061756498 0.061756498 0.000617565 0.061756498Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Naphthalene 0.219537131 0.219537131 0.002195371 0.289648744Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 2-Methylnaphthalene 0.084658607 0.084658607 0.000846586 0.11152946Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Acenaphthylene 0.070283625 0.070283625 0.000702836 0.092678059Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Acenaphthene 0.014479833 0.014479833 0.000144798 0.019139229Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Fluorene 0.031365091 0.031365091 0.000313651 0.041570669Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Phenanthrene 0.369189485 0.369189485 0.003691895 0.488661642 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Anthracene 0.025160329 0.025160329 0.000251603 0.032826163 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Fluoranthene 0.157187295 0.157187295 0.001571873 0.206729445 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Pyrene 0.101673387 0.101673387 0.001016734 0.133489409Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Benzo(a)anthracene 0.00076069 0.00076069 7.6069E-06 0.00071546Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Chrysene 0.003258631 0.003258631 3.25863E-05 0.003478614Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Benzo(b)fluoranthene 0.002861838 0.002861838 2.86184E-05 0.003399118Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Benzo(k)fluoranthene 0.001064966 0.001064966 1.06497E-05 0.001241775 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Benzo(e)pyrene 0.001938731 0.001938731 1.93873E-05 0.002379383 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Benzo(a)pyrene 0.000536595 0.000536595 5.36595E-06 0.000663376Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Perylene 7.40131E-05 7.40131E-05 7.40131E-07 9.04604E-05 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Indeno(1,2,3-cd)pyrene 0.000696956 0.000696956 6.96956E-06 0.000841556Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Dibenz(a,h)anthracene 0.000189144 0.000189144 1.89144E-06 0.000233004Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Benzo(g,h,i)perylene 0.000810032 0.000810032 8.10032E-06 0.001016994Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Formaldehyde 0.027171428 0.027171428 0.000271714 0.027171428Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 2,3,7,8-Tetrachlorodibenzo-p-dioxin 2.47533E-10 2.47533E-10 2.47533E-12 2.47533E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,7,8-Pentachlorodibenzo-dioxin 2.76315E-10 2.76315E-10 2.76315E-12 2.76315E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 2.38075E-10 2.38075E-10 2.38075E-12 2.38075E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 2.40954E-10 2.40954E-10 2.40954E-12 2.40954E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 3.29769E-10 3.29769E-10 3.29769E-12 3.29769E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 7.80015E-10 7.80015E-10 7.80015E-12 7.80015E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 1.10074E-08 1.10074E-08 1.10074E-10 1.10074E-08Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 2,3,7,8-Tetrachlorodibenzofuran 3.19901E-10 3.19901E-10 3.19901E-12 3.19901E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,7,8-Pentachlorodibenzofuran 2.35197E-10 2.35197E-10 2.35197E-12 2.35197E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 2,3,4,7,8-Pentachlorodibenzofuran 2.94408E-10 2.94408E-10 2.94408E-12 2.94408E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,7,8-Hexachlorodibenzofuran 2.12993E-10 2.12993E-10 2.12993E-12 2.12993E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,6,7,8-Hexachlorodibenzofuran 1.82977E-10 1.82977E-10 1.82977E-12 1.82977E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 2,3,4,6,7,8-Hexachlorodibenzofuran 1.99424E-10 1.99424E-10 1.99424E-12 1.99424E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,7,8,9-Hexachlorodibenzofuran 2.31908E-10 2.31908E-10 2.31908E-12 2.31908E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzofuran 2.84539E-10 2.84539E-10 2.84539E-12 2.84539E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.77549E-10 2.77549E-10 2.77549E-12 2.77549E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 5.69078E-10 5.69078E-10 5.69078E-12 5.69078E-10Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Fugitives Polychlorinated biphenyls 6.81232E-08 6.81232E-08 6.81232E-10 6.81232E-08Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12

Electric Arc Furnace #12 Tapping Fugitives Arsenic 0.004272355 0.000305168 4.27235E-05 0.004272355 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Cadmium 0.034279674 0.002448548 0.000342797 0.034279674Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Chromium 0.003370118 0.000240723 3.37012E-05 0.003370118Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Lead 0.128096334 0.009149738 0.001280963 0.128096334Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Manganese 20.427225 1.4590875 0.20427225 20.427225Assumed 41% Mn content for tapping Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Assumed 41% Mn content for tapping Electric Arc Furnace #12 Tapping Fugitives Mercury 0.000268414 1.91724E-05 2.68414E-06 0.000268414Used 50/50 Hg Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used 50/50 Hg Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Nickel 0.00283143 0.000202245 2.83143E-05 0.00283143 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Chromium (VI) 0.001454193 0.000103871 1.45419E-05 0.001454193 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives PM Filterable 49.8225 3.55875 0.498225 49.8225 Used 1.3 lb/ton, 12.5 ton/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used 1.3 lb/ton, 12.5 ton/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Hydrochloric Acid 0.660468857 0.047176347 0.006604689 0.660468857Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Hydrogen Fluoride 0.39855495 0.028468211 0.003985549 0.39855495 Based on PM and pollutant/PM ratio from Furnace 12 Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #12 Tapping Fugitives Naphthalene 0.124500398 0.008892886 0.001245004 0.124500398Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 2-Methylnaphthalene 0.075425168 0.005387512 0.000754252 0.075425168Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Acenaphthylene 0.060885867 0.00434899 0.000608859 0.060885867Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Acenaphthene 0.029567317 0.002111951 0.000295673 0.029567317Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Fluorene 0.034006488 0.002429035 0.000340065 0.034006488Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Phenanthrene 0.115418426 0.008244173 0.001154184 0.115418426Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Anthracene 0.022725293 0.001623235 0.000227253 0.022725293 Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Fluoranthene 0.022480935 0.001605781 0.000224809 0.022480935 Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Pyrene 0.017349418 0.001239244 0.000173494 0.017349418Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Benzo(a)anthracene 0.001873411 0.000133815 1.87341E-05 0.001873411Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Chrysene 0.003176654 0.000226904 3.17665E-05 0.003176654Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Benzo(b)fluoranthene 0.001547601 0.000110543 1.5476E-05 0.001547601Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Benzo(k)fluoranthene 0.0007738 5.52715E-05 7.738E-06 0.0007738Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Benzo(e)pyrene 0.002036317 0.000145451 2.03632E-05 0.002036317Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Benzo(a)pyrene 0.000570169 4.07263E-05 5.70169E-06 0.000570169Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Perylene 8.14527E-05 5.81805E-06 8.14527E-07 8.14527E-05 Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Indeno(1,2,3-cd)pyrene 0.000366537 2.61812E-05 3.66537E-06 0.000366537Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Dibenz(a,h)anthracene 0.000122179 8.72707E-06 1.22179E-06 0.000122179Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Benzo(g,h,i)perylene 0.000855253 6.10895E-05 8.55253E-06 0.000855253 Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Formaldehyde 0.354481997 0.025320143 0.00354482 0.354481997Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 2,3,7,8-Tetrachlorodibenzo-p-dioxin 5.74241E-09 4.10172E-10 5.74241E-11 5.74241E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,7,8-Pentachlorodibenzo-dioxin 7.86018E-09 5.61442E-10 7.86018E-11 7.86018E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 5.33515E-09 3.81082E-10 5.33515E-11 5.33515E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 5.17224E-09 3.69446E-10 5.17224E-11 5.17224E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 5.2537E-09 3.75264E-10 5.2537E-11 5.2537E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 9.77432E-09 6.98166E-10 9.77432E-11 9.77432E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 8.10454E-08 5.78896E-09 8.10454E-10 8.10454E-08Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 2,3,7,8-Tetrachlorodibenzofuran 8.38962E-09 5.99259E-10 8.38962E-11 8.38962E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,7,8-Pentachlorodibenzofuran 6.31258E-09 4.50899E-10 6.31258E-11 6.31258E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 2,3,4,7,8-Pentachlorodibenzofuran 9.97795E-09 7.12711E-10 9.97795E-11 9.97795E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,7,8-Hexachlorodibenzofuran 6.27186E-09 4.4799E-10 6.27186E-11 6.27186E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,6,7,8-Hexachlorodibenzofuran 4.84643E-09 3.46174E-10 4.84643E-11 4.84643E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 2,3,4,6,7,8-Hexachlorodibenzofuran 7.29001E-09 5.20715E-10 7.29001E-11 7.29001E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,7,8,9-Hexachlorodibenzofuran 5.74241E-09 4.10172E-10 5.74241E-11 5.74241E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.42542E-08 1.01816E-09 1.42542E-10 1.42542E-08Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,7,8,9-Heptachlorodibenzofuran 5.33515E-09 3.81082E-10 5.33515E-11 5.33515E-09Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.42949E-08 1.02107E-09 1.42949E-10 1.42949E-08Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Electric Arc Furnace #12 Tapping Fugitives Polychlorinated biphenyls 1.98838E-06 1.42027E-07 1.98838E-08 1.98838E-06Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture Tapping emissions moved to Casting/Tapping #12 BH Assumes building capture of 99% Used Org HAP Tap EF, 12.5 Tons/hr and 30% capture

MOR Process Fugitives Arsenic 0.004862234 0.000405186 0.004862234 0.008103723 Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Cadmium 0.008760529 0.000730044 0.008760529 0.014600881Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Chromium 0.019197106 0.001599759 0.019197106 0.031995177Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Lead 0.004126119 0.000343843 0.004126119 0.006876865 Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Manganese 5.2203906 0.43503255 5.2203906 8.700651Assumed 41% Mn content for MOR Assumes capture increased from 50% to 95% Assumes building capture of 99% Assumed 41% Mn content for MOR MOR Process Fugitives Mercury 6.8596E-05 5.71633E-06 6.8596E-05 6.8596E-05 Used 50/50 Hg Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used 50/50 Hg Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Nickel 0.006489436 0.000540786 0.006489436 0.010815726Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Chromium (VI) 0.000371634 3.09695E-05 0.000371634 0.00061939Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives PM Filterable 12.73266 1.061055 12.73266 21.2211Used 0.19 lb/ton, 25.5 tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used 0.19 lb/ton, 25.5 tons/hr and 40% capture MOR Process Fugitives Hydrochloric Acid 0.168789711 0.014065809 0.168789711 0.281316186Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Hydrogen Fluoride 0.101854878 0.008487907 0.101854878 0.16975813 Based on PM and pollutant/PM ratio from MOR baghouse Assumes capture increased from 50% to 95% Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR Process Fugitives Naphthalene 0.030593631 0.002549469 0.030593631 0.030593631Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives 2-Methylnaphthalene 0.018534316 0.001544526 0.018534316 0.018534316Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Acenaphthylene 0.014961557 0.001246796 0.014961557 0.014961557Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Acenaphthene 0.007265612 0.000605468 0.007265612 0.007265612Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Fluorene 0.008356455 0.000696371 0.008356455 0.008356455 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Phenanthrene 0.028361907 0.002363492 0.028361907 0.028361907Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Anthracene 0.005584313 0.000465359 0.005584313 0.005584313 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Fluoranthene 0.005524267 0.000460356 0.005524267 0.005524267Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Pyrene 0.004263293 0.000355274 0.004263293 0.004263293 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Benzo(a)anthracene 0.000460356 3.8363E-05 0.000460356 0.000460356Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Chrysene 0.000780603 6.50502E-05 0.000780603 0.000780603 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Benzo(b)fluoranthene 0.000380294 3.16911E-05 0.000380294 0.000380294Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Benzo(k)fluoranthene 0.000190147 1.58456E-05 0.000190147 0.000190147Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Benzo(e)pyrene 0.000500387 4.16989E-05 0.000500387 0.000500387Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Benzo(a)pyrene 0.000140108 1.16757E-05 0.000140108 0.000140108Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Perylene 2.00155E-05 1.66796E-06 2.00155E-05 2.00155E-05 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Indeno(1,2,3-cd)pyrene 9.00696E-05 7.5058E-06 9.00696E-05 9.00696E-05 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Dibenz(a,h)anthracene 3.00232E-05 2.50193E-06 3.00232E-05 3.00232E-05 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Benzo(g,h,i)perylene 0.000210162 1.75135E-05 0.000210162 0.000210162Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR Process Fugitives Formaldehyde 0.087107284 0.00725894 0.087107284 0.087107284Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture

C2P crushing and sizing fugitives Arsenic 0.000567003 0.000567003 5.67003E-06 0.000567003 Used pollutant/PM ratio from C2P No change from baseline Assumes building capture of 99% Used pollutant/PM ratio from C2P C2P crushing and sizing fugitives Chromium 0.005994035 0.005994035 5.99403E-05 0.005994035 Used pollutant/PM ratio from C2P No change from baseline Assumes building capture of 99% Used pollutant/PM ratio from C2P C2P crushing and sizing fugitives Lead 0.000603142 0.000603142 6.03142E-06 0.000603142Used pollutant/PM ratio from C2P No change from baseline Assumes building capture of 99% Used pollutant/PM ratio from C2P C2P crushing and sizing fugitives Manganese 6.3523432 6.3523432 0.063523432 0Assumed 41% Mn content for crushing No change from baseline Assumes building capture of 99% Assumed 41% Mn content for crushing C2P crushing and sizing fugitives Nickel 0.006455114 0.006455114 6.45511E-05 0.006455114Used pollutant/PM ratio from C2P No change from baseline Assumes building capture of 99% Used pollutant/PM ratio from C2P C2P crushing and sizing fugitives Chromium (VI) 0.000452217 0.000452217 4.52217E-06 0.000452217Used pollutant/PM ratio from C2P No change from baseline Assumes building capture of 99% Used pollutant/PM ratio from C2P C2P crushing and sizing fugitives PM Filterable 15.49352 15.49352 0.1549352 15.49352Calculated using EF from Metallic Minerals Processing No change from baseline Assumes building capture of 99% Calculated using EF from Metallic Minerals Processing

Furnace #1 casting Arsenic 0.000485419 2.4271E-05 4.85419E-06 0.000485419Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Cadmium 0.0028165 0.000140825 2.8165E-05 0.0028165 Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Chromium 0.001120199 5.60099E-05 1.1202E-05 0.001120199Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Lead 0.026986123 0.001349306 0.000269861 0.026986123 Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Manganese 4.435626 0.2217813 0.04435626 4.435626Assumed 41% Mn content for casting Added 95% capture to casting Assumes building capture of 99% Assumed 41% Mn content for casting Furnace #1 casting Mercury 5.82842E-05 2.91421E-06 5.82842E-07 5.82842E-05 Used 50/50 Hg Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used 50/50 Hg Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Nickel 0.003846016 0.000192301 3.84602E-05 0.003846016Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Chromium (VI) 0.000315768 1.57884E-05 3.15768E-06 0.000315768Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1

Page 3 of 6Eramet EF

Furnace #1 casting PM Filterable 10.8186 0.54093 0.108186 10.8186Used 0.19 lb/ton and 13 tons/hr processed Added 95% capture to casting Assumes building capture of 99% Used 0.19 lb/ton and 13 tons/hr processed Furnace #1 casting Hydrochloric Acid 0.804686809 0.04023434 0.008046868 0.804686809Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Hydrogen Fluoride 1.936343647 0.096817182 0.019363436 1.936343647Based on PM and pollutant/PM ratio from Furnace 1 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 1 Furnace #1 casting Naphthalene 0.025994589 0.001299729 0.000259946 0.025994589Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting 2-Methylnaphthalene 0.015748112 0.000787406 0.000157481 0.015748112Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Acenaphthylene 0.012712434 0.000635622 0.000127124 0.012712434Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Acenaphthene 0.006173396 0.00030867 6.1734E-05 0.006173396Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Fluorene 0.007100256 0.000355013 7.10026E-05 0.007100256Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Phenanthrene 0.024098353 0.001204918 0.000240984 0.024098353 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Anthracene 0.004744841 0.000237242 4.74484E-05 0.004744841Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Fluoranthene 0.004693822 0.000234691 4.69382E-05 0.004693822Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Pyrene 0.003622406 0.00018112 3.62241E-05 0.003622406Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Benzo(a)anthracene 0.000391152 1.95576E-05 3.91152E-06 0.000391152Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Chrysene 0.000663257 3.31629E-05 6.63257E-06 0.000663257Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Benzo(b)fluoranthene 0.000323125 1.61563E-05 3.23125E-06 0.000323125 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Benzo(k)fluoranthene 0.000161563 8.07814E-06 1.61563E-06 0.000161563 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Benzo(e)pyrene 0.000425165 2.12583E-05 4.25165E-06 0.000425165 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Benzo(a)pyrene 0.000119046 5.95231E-06 1.19046E-06 0.000119046Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Perylene 1.70066E-05 8.5033E-07 1.70066E-07 1.70066E-05 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Indeno(1,2,3-cd)pyrene 7.65297E-05 3.82649E-06 7.65297E-07 7.65297E-05 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Dibenz(a,h)anthracene 2.55099E-05 1.2755E-06 2.55099E-07 2.55099E-05 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Benzo(g,h,i)perylene 0.000178569 8.92847E-06 1.78569E-06 0.000178569Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture Furnace #1 casting Formaldehyde 0.074012725 0.003700636 0.000740127 0.074012725 Used Org HAP Cast EF, 13 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 13 Tons/hr and 0% capture

Furnace #12 casting Arsenic 0.00089203 4.46015E-05 8.9203E-06 0.00089203 Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Cadmium 0.007157295 0.000357865 7.15729E-05 0.007157295 Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Chromium 0.000703651 3.51826E-05 7.03651E-06 0.000703651Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Lead 0.026745388 0.001337269 0.000267454 0.026745388Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Manganese 4.265025 0.21325125 0.04265025 4.265025Assumed 41% Mn content for casting Added 95% capture to casting Assumes building capture of 99% Assumed 41% Mn content for casting Furnace #12 casting Mercury 5.60425E-05 2.80212E-06 5.60425E-07 5.60425E-05 Used 50/50 Hg Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used 50/50 Hg Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Nickel 0.000591178 2.95589E-05 5.91178E-06 0.000591178Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Chromium (VI) 0.000303623 1.51811E-05 3.03623E-06 0.000303623 Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting PM Filterable 10.4025 0.520125 0.104025 10.4025 Used 0.19 lb/ton and 12.5 tons/hr processed Added 95% capture to casting Assumes building capture of 99% Used 0.19 lb/ton and 12.5 tons/hr processed Furnace #12 casting Hydrochloric Acid 0.137900091 0.006895005 0.001379001 0.137900091Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Hydrogen Fluoride 0.08321477 0.004160738 0.000832148 0.08321477Based on PM and pollutant/PM ratio from Furnace 12 Added 95% capture to casting Assumes building capture of 99% Based on PM and pollutant/PM ratio from Furnace 12 Furnace #12 casting Naphthalene 0.024994797 0.00124974 0.000249948 0.024994797Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting 2-Methylnaphthalene 0.015142415 0.000757121 0.000151424 0.015142415 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Acenaphthylene 0.012223494 0.000611175 0.000122235 0.012223494Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Acenaphthene 0.005935958 0.000296798 5.93596E-05 0.005935958Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Fluorene 0.006827169 0.000341358 6.82717E-05 0.006827169Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Phenanthrene 0.023171493 0.001158575 0.000231715 0.023171493 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Anthracene 0.004562348 0.000228117 4.56235E-05 0.004562348Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Fluoranthene 0.00451329 0.000225665 4.51329E-05 0.00451329Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Pyrene 0.003483083 0.000174154 3.48308E-05 0.003483083 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Benzo(a)anthracene 0.000376108 1.88054E-05 3.76108E-06 0.000376108Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Chrysene 0.000637748 3.18874E-05 6.37748E-06 0.000637748Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Benzo(b)fluoranthene 0.000310698 1.55349E-05 3.10698E-06 0.000310698Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Benzo(k)fluoranthene 0.000155349 7.76744E-06 1.55349E-06 0.000155349Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Benzo(e)pyrene 0.000408813 2.04406E-05 4.08813E-06 0.000408813 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Benzo(a)pyrene 0.000114468 5.72338E-06 1.14468E-06 0.000114468Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Perylene 1.63525E-05 8.17625E-07 1.63525E-07 1.63525E-05 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Indeno(1,2,3-cd)pyrene 7.35863E-05 3.67931E-06 7.35863E-07 7.35863E-05 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Dibenz(a,h)anthracene 2.45288E-05 1.22644E-06 2.45288E-07 2.45288E-05 Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Benzo(g,h,i)perylene 0.000171701 8.58506E-06 1.71701E-06 0.000171701Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Furnace #12 casting Formaldehyde 0.071166081 0.003558304 0.000711661 0.071166081Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture Added 95% capture to casting Assumes building capture of 99% Used Org HAP Cast EF, 12.5 Tons/hr and 0% capture

MOR casting Arsenic 0.004862234 0.000405186 0.004862234 0.004862234Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Cadmium 0.008760529 0.000730044 0.008760529 0.008760529Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Chromium 0.019197106 0.001599759 0.019197106 0.019197106Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Lead 0.004126119 0.000343843 0.004126119 0.004126119Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Manganese 5.2203906 0.43503255 5.2203906 5.2203906Assumed 41% Mn content for casting Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Assumed 41% Mn content for casting MOR casting Mercury 6.8596E-05 5.71633E-06 6.8596E-05 6.8596E-05 Used 50/50 Hg Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used 50/50 Hg Cast EF, 25.5 Tons/hr and 40% capture MOR casting Nickel 0.006489436 0.000540786 0.006489436 0.006489436Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Chromium (VI) 0.000371634 3.09695E-05 0.000371634 0.000371634Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting PM Filterable 12.73266 1.061055 12.73266 12.73266Used 0.19 lb/ton, 25.5 tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used 0.19 lb/ton, 25.5 tons/hr and 40% capture MOR casting Hydrochloric Acid 0.168789711 0.014065809 0.168789711 0.168789711Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Hydrogen Fluoride 0.101854878 0.008487907 0.101854878 0.101854878Based on PM and pollutant/PM ratio from MOR baghouse Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Based on PM and pollutant/PM ratio from MOR baghouse MOR casting Naphthalene 0.030593631 0.002549469 0.030593631 0.030593631Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting 2-Methylnaphthalene 0.018534316 0.001544526 0.018534316 0.018534316Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Acenaphthylene 0.014961557 0.001246796 0.014961557 0.014961557Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Acenaphthene 0.007265612 0.000605468 0.007265612 0.007265612Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Fluorene 0.008356455 0.000696371 0.008356455 0.008356455 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Phenanthrene 0.028361907 0.002363492 0.028361907 0.028361907Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Anthracene 0.005584313 0.000465359 0.005584313 0.005584313 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Fluoranthene 0.005524267 0.000460356 0.005524267 0.005524267Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Pyrene 0.004263293 0.000355274 0.004263293 0.004263293 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Benzo(a)anthracene 0.000460356 3.8363E-05 0.000460356 0.000460356Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Chrysene 0.000780603 6.50502E-05 0.000780603 0.000780603 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Benzo(b)fluoranthene 0.000380294 3.16911E-05 0.000380294 0.000380294Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Benzo(k)fluoranthene 0.000190147 1.58456E-05 0.000190147 0.000190147Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Benzo(e)pyrene 0.000500387 4.16989E-05 0.000500387 0.000500387Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Benzo(a)pyrene 0.000140108 1.16757E-05 0.000140108 0.000140108Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Perylene 2.00155E-05 1.66796E-06 2.00155E-05 2.00155E-05 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Indeno(1,2,3-cd)pyrene 9.00696E-05 7.5058E-06 9.00696E-05 9.00696E-05 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Dibenz(a,h)anthracene 3.00232E-05 2.50193E-06 3.00232E-05 3.00232E-05 Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Benzo(g,h,i)perylene 0.000210162 1.75135E-05 0.000210162 0.000210162Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture MOR casting Formaldehyde 0.087107284 0.00725894 0.087107284 0.087107284Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture Capture increased from 40% to 95%, secondary capture Assumes building capture of 99% Used Org HAP Cast EF, 25.5 Tons/hr and 40% capture

Electric Arc Furnace #1 Tapping Baghouse Arsenic 0.00010512 9.22297E-06 0.00010512 0.00010512Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Cadmium 0.00004818 5.35135E-05 0.00004818 0.00004818Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Chromium 0.00093294 2.12838E-05 0.00093294 0.00093294Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Lead 0.01080765 0.000512736 0.01080765 0.01080765 Based on 7/2012, 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012, 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Manganese 0.324861315 0.084276894 0.324861315 0.324861315SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013) @ 50% Assumes Furnace 1 casting baghouse No change from baseline SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013) @ 50% Electric Arc Furnace #1 Tapping Baghouse Mercury 0.00005256 4.70645E-05 0.00005256 0.00005256Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Nickel 0.00125268 7.30743E-05 0.00125268 0.00125268Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Chromium (VI) 0.00016265 5.99958E-06 0.00016265 6.84389E-05 Based on Cr+6/PM ratio from EAF 12 Assumes Furnace 1 casting baghouse No change from baseline Based on Cr+6/PM ratio from EAF 12 Electric Arc Furnace #1 Tapping Baghouse PM Filterable 5.57259735 0.2055534 5.57259735 2.344803435SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013,3/2014) @ 50%Assumes Furnace 1 casting baghouse No change from baseline SiMn (5/2011, 7/2012) @ 50%, FeMn (3/2013) @ 50% Electric Arc Furnace #1 Tapping Baghouse Hydrochloric Acid 0.18000924 0.764452469 0.18000924 0.18000924Based on 5/2011, 7/2012, 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 5/2011, 7/2012, 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Hydrogen Fluoride 0.997399245 1.839526465 0.997399245 0.419679555 Based on HF/PM ratio from Furnace 1 Assumes Furnace 1 casting baghouse No change from baseline Based on HF/PM ratio from Furnace 1 Electric Arc Furnace #1 Tapping Baghouse Naphthalene 0.01338966 0.01234743 0.01338966 0.01338966Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse 2-Methylnaphthalene 0.00811176 0.007480353 0.00811176 0.00811176Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Acenaphthylene 0.0065481 0.006038406 0.0065481 0.0065481Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Acenaphthene 0.00317988 0.002932363 0.00317988 0.00317988Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Fluorene 0.0036573 0.003372621 0.0036573 0.0036573 Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Phenanthrene 0.01241292 0.011446718 0.01241292 0.01241292Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Anthracene 0.00244404 0.0022538 0.00244404 0.00244404Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Fluoranthene 0.00241776 0.002229565 0.00241776 0.00241776Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Pyrene 0.00186588 0.001720643 0.00186588 0.00186588Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Benzo(a)anthracene 0.00020148 0.000185797 0.00020148 0.00020148Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Chrysene 0.00034164 0.000315047 0.00034164 0.00034164Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Benzo(b)fluoranthene 0.00016644 0.000153485 0.00016644 0.00016644Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Benzo(k)fluoranthene 0.00008322 7.67423E-05 0.00008322 0.00008322Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Benzo(e)pyrene 0.000219 0.000201953 0.000219 0.000219Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Benzo(a)pyrene 0.00006132 5.65469E-05 0.00006132 0.00006132Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Perylene 0.00000876 8.07814E-06 0.00000876 0.00000876Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Indeno(1,2,3-cd)pyrene 0.00003942 3.63516E-05 0.00003942 0.00003942Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Dibenz(a,h)anthracene 0.00001314 1.21172E-05 0.00001314 0.00001314Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Benzo(g,h,i)perylene 0.00009198 8.48204E-05 0.00009198 0.00009198Based on 3/2013 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 3/2013 stack test data Electric Arc Furnace #1 Tapping Baghouse Formaldehyde 0.03812352 0.070312088 0.03812352 0.03812352Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 2,3,7,8-Tetrachlorodibenzo-p-dioxin 6.1758E-10 6.1758E-10 6.1758E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,7,8-Pentachlorodibenzo-dioxin 8.4534E-10 8.4534E-10 8.4534E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 5.7378E-10 5.7378E-10 5.7378E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 5.5626E-10 5.5626E-10 5.5626E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 5.6502E-10 5.6502E-10 5.6502E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.0512E-09 1.0512E-09 1.0512E-09Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 8.7162E-09 8.7162E-09 8.7162E-09Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 2,3,7,8-Tetrachlorodibenzofuran 9.0228E-10 9.0228E-10 9.0228E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,7,8-Pentachlorodibenzofuran 6.789E-10 6.789E-10 6.789E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 2,3,4,7,8-Pentachlorodibenzofuran 1.0731E-09 1.0731E-09 1.0731E-09Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,7,8-Hexachlorodibenzofuran 6.7452E-10 6.7452E-10 6.7452E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,6,7,8-Hexachlorodibenzofuran 5.2122E-10 5.2122E-10 5.2122E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 2,3,4,6,7,8-Hexachlorodibenzofuran 7.8402E-10 7.8402E-10 7.8402E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,7,8,9-Hexachlorodibenzofuran 6.1758E-10 6.1758E-10 6.1758E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.533E-09 1.533E-09 1.533E-09Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,7,8,9-Heptachlorodibenzofuran 5.7378E-10 5.7378E-10 5.7378E-10Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.53738E-09 1.53738E-09 1.53738E-09Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data Electric Arc Furnace #1 Tapping Baghouse Polychlorinated biphenyls 2.13845E-07 2.13845E-07 2.13845E-07Based on 7/2012 stack test data Assumes Furnace 1 casting baghouse No change from baseline Based on 7/2012 stack test data

EAF #12 Tapping and Casting Baghouse Arsenic 9.62923E-05 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Cadmium 0.000772611 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Chromium 7.59573E-05 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH)

Page 4 of 6Eramet EF

EAF #12 Tapping and Casting Baghouse Lead 0.002887094 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Manganese 0.460398225 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Mercury 0.005895072 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Nickel 6.38161E-05 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Chromium (VI) 3.27753E-05 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse PM Filterable 1.1229225 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Hydrochloric Acid 0.744297596 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Hydrogen Fluoride 0.44914077 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Naphthalene 0.069676285 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 2-Methylnaphthalene 0.042211475 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Acenaphthylene 0.034074598 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Acenaphthene 0.016547263 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Fluorene 0.019031632 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Phenanthrene 0.064593586 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Anthracene 0.012718144 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Fluoranthene 0.01258139 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Pyrene 0.009709551 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Benzo(a)anthracene 0.001048449 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Chrysene 0.001777805 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Benzo(b)fluoranthene 0.00086611 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Benzo(k)fluoranthene 0.000433055 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Benzo(e)pyrene 0.001139619 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Benzo(a)pyrene 0.000319093 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Perylene 4.55847E-05 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Indeno(1,2,3-cd)pyrene 0.000205131 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Dibenz(a,h)anthracene 6.83771E-05 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Benzo(g,h,i)perylene 0.00047864 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Formaldehyde 0.396769632 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 2,3,7,8-Tetrachlorodibenzo-p-dioxin 2.66612E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,7,8-Pentachlorodibenzo-dioxin 3.64937E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 2.47703E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 2.4014E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 2.43922E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 4.53808E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.76282E-08 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 2,3,7,8-Tetrachlorodibenzofuran 3.89518E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,7,8-Pentachlorodibenzofuran 2.93084E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 2,3,4,7,8-Pentachlorodibenzofuran 4.63262E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,7,8-Hexachlorodibenzofuran 2.91193E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,6,7,8-Hexachlorodibenzofuran 2.25013E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 2,3,4,6,7,8-Hexachlorodibenzofuran 3.38465E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,7,8,9-Hexachlorodibenzofuran 2.66612E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzofuran 6.61803E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.47703E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 6.63694E-09 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH) EAF #12 Tapping and Casting Baghouse Polychlorinated biphenyls 9.23177E-07 Not installed (Values used to estimate tapping to BH) Assumes control of captured casting emissions Not installed Not installed (Values used to estimate tapping to BH)

MOR Secondary Baghouse Arsenic 4.86223E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Cadmium 8.76053E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Chromium 0.000191971 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Lead 4.12612E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Manganese 0.052203906 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Mercury 2.91533E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Nickel 6.48944E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Chromium (VI) 3.71634E-06 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse PM Filterable 0.1273266 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Hydrochloric Acid 0.084394856 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Hydrogen Fluoride 0.050927439 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Naphthalene 0.007648408 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse 2-Methylnaphthalene 0.004633579 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Acenaphthylene 0.003740389 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Acenaphthene 0.001816403 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Fluorene 0.002089114 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Phenanthrene 0.007090477 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Anthracene 0.001396078 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Fluoranthene 0.001381067 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Pyrene 0.001065823 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Benzo(a)anthracene 0.000115089 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Chrysene 0.000195151 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Benzo(b)fluoranthene 9.50734E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Benzo(k)fluoranthene 4.75367E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Benzo(e)pyrene 0.000125097 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Benzo(a)pyrene 3.50271E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Perylene 5.00387E-06 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Indeno(1,2,3-cd)pyrene 2.25174E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Dibenz(a,h)anthracene 7.5058E-06 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Benzo(g,h,i)perylene 5.25406E-05 Not installed Assumes control of captured casting emissions Not installed Not installed MOR Secondary Baghouse Formaldehyde 0.043553642 Not installed Assumes control of captured casting emissions Not installed Not installed

Electric Arc Furnace #1 Building Baghouse Arsenic 8.08559E-05 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Cadmium 0.000404003 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Chromium 0.000279365 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Lead 0.00388287 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Manganese 0.719009363 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Mercury 0.00252913 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Nickel 0.000679489 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Chromium (VI) 5.4248E-05 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse PM Filterable 1.858607173 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Hydrochloric Acid 5.771271417 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Hydrogen Fluoride 13.88759529 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Naphthalene 0.222577586 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 2-Methylnaphthalene 0.077797249 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Acenaphthylene 0.101791329 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Acenaphthene 0.030400954 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Fluorene 0.044348761 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Phenanthrene 0.525327724 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Anthracene 0.079351609 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Fluoranthene 0.892332938 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Pyrene 0.65124039 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Benzo(a)anthracene 0.105592054 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Chrysene 0.231116529 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Benzo(b)fluoranthene 0.085266751 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Benzo(k)fluoranthene 0.026508243 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Benzo(e)pyrene 0.041280912 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Benzo(a)pyrene 0.014711936 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Perylene 0.002382439 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Indeno(1,2,3-cd)pyrene 0.005266977 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Dibenz(a,h)anthracene 0.000858235 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Benzo(g,h,i)perylene 0.004435841 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Formaldehyde 0.788045427 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 2,3,7,8-Tetrachlorodibenzo-p-dioxin 4.27846E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,7,8-Pentachlorodibenzo-dioxin 5.26687E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 3.69594E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 3.57936E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 3.64172E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 6.44131E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 4.83927E-08 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 2,3,7,8-Tetrachlorodibenzofuran 6.00805E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,7,8-Pentachlorodibenzofuran 4.16544E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 2,3,4,7,8-Pentachlorodibenzofuran 6.18811E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,7,8-Hexachlorodibenzofuran 4.25638E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,6,7,8-Hexachlorodibenzofuran 3.2424E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 2,3,4,6,7,8-Hexachlorodibenzofuran 4.66751E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,7,8,9-Hexachlorodibenzofuran 3.90802E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzofuran 8.6154E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,7,8,9-Heptachlorodibenzofuran 3.82824E-09 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.01629E-08 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed Electric Arc Furnace #1 Building Baghouse Polychlorinated biphenyls 1.36649E-06 Not installed Not installed Assumes control of captured Bldg #1 emissions Not installed

Electric Arc Furnace #12 Building Baghouse Arsenic 0.000115363 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Cadmium 0.000925623 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Chromium 9.10003E-05 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Lead 0.00345887 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Manganese 0.514465276 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Mercury 0.001813547 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Nickel 7.64545E-05 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Chromium (VI) 3.92663E-05 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse PM Filterable 1.34531194 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Hydrochloric Acid 0.891702182 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Hydrogen Fluoride 0.538090955 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Naphthalene 0.182671001 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse 2-Methylnaphthalene 0.086736964 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed

Page 5 of 6Eramet EF

Electric Arc Furnace #12 Building Baghouse Acenaphthylene 0.070979528 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Acenaphthene 0.024741638 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Fluorene 0.03573838 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Phenanthrene 0.251350805 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Anthracene 0.025961745 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Fluoranthene 0.091169853 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Pyrene 0.060640414 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Benzo(a)anthracene 0.001490053 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Chrysene 0.003501151 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Benzo(b)fluoranthene 0.002336468 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Benzo(k)fluoranthene 0.000987087 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Benzo(e)pyrene 0.002170011 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Benzo(a)pyrene 0.000604509 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Perylene 8.505E-05 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Indeno(1,2,3-cd)pyrene 0.000562854 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Dibenz(a,h)anthracene 0.000166247 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Benzo(g,h,i)perylene 0.000909308 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse Formaldehyde 0.448291312 Not installed Not installed Assumes control of captured Bldg #12 emissions Not installed Electric Arc Furnace #12 Building Baghouse 2,3,7,8-Tetrachlorodibenzo-p-dioxin 2.96502E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,7,8-Pentachlorodibenzo-dioxin 4.02757E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 2.75875E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 2.67953E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 2.76382E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 5.2244E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 4.55661E-08 Electric Arc Furnace #12 Building Baghouse 2,3,7,8-Tetrachlorodibenzofuran 4.31122E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,7,8-Pentachlorodibenzofuran 3.24115E-09 Electric Arc Furnace #12 Building Baghouse 2,3,4,7,8-Pentachlorodibenzofuran 5.08482E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,7,8-Hexachlorodibenzofuran 3.21E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,6,7,8-Hexachlorodibenzofuran 2.48956E-09 Electric Arc Furnace #12 Building Baghouse 2,3,4,6,7,8-Hexachlorodibenzofuran 3.70727E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,7,8,9-Hexachlorodibenzofuran 2.95729E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzofuran 7.19668E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.77829E-09 Electric Arc Furnace #12 Building Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 7.35769E-09 Electric Arc Furnace #12 Building Baghouse Polychlorinated biphenyls 1.01797E-06

Baseline (tpy) Enhanced Capture (tpy) Building

Ventilation (tpy) Final Baseline (tpy) Emission Totals Arsenic 0.025162051 0.008532768 0.015547346 0.02840354 Cadmium 0.117305925 0.044658806 0.052154259 0.123146277 Chromium (III) 0.06279752 0.021937641 0.049231832 0.075442046 Lead 0.519085852 0.200911847 0.159340601 0.521836597 Manganese 86.70344303 27.77851862 26.26318571 83.83136023 Mercuric Chloride 0.041901752 0.041679284 0.031018795 0.032527227 Mercury (elemental) 0.167607008 0.166717137 0.124075181 0.130108909 Nickel 0.063910223 0.026014892 0.026868975 0.068236513 Chromium (VI) 0.007490179 0.00323852 0.002907979 0.007643724 Hydrochloric Acid 8.491834624 8.448228745 8.491834624 8.604361098 Hydrogen Fluoride 17.71439972 17.68808608 17.71439972 17.20458328 Naphthalene 2.444124935 2.173818508 2.038876347 2.912940928 2-Methylnaphthalene 0.918861421 0.775701535 0.754327208 1.066625844 Acenaphthylene 0.917436705 0.801044576 0.744665848 1.223358714 Acenaphthene 0.234481353 0.186332281 0.179338761 0.269728286 Fluorene 0.407386151 0.345739797 0.32729901 0.429094958 Phenanthrene 4.706498175 4.385321333 3.929819646 4.812097765 Anthracene 0.507796884 0.464811234 0.402483531 0.462519599 Fluoranthene 4.784043185 4.685149504 3.800540395 2.539082591 Pyrene 3.404432346 3.336478098 2.692551541 1.787549561 Benzo(a)anthracene 0.446316793 0.443332821 0.339234686 0.145139528 Chrysene 0.987227373 0.981328729 0.752609693 0.42254604 Benzo(b)fluoranthene 0.375474773 0.372058112 0.287871554 0.158099438 Benzo(k)fluoranthene 0.118009287 0.116456884 0.090513957 0.044792503 Benzo(e)pyrene 0.185950999 0.182233788 0.142500076 0.20433684 Benzo(a)pyrene 0.065180389 0.064142233 0.049863944 0.025033235 Perylene 0.010465043 0.010317862 0.007997554 0.002739382 Indeno(1,2,3-cd)pyrene 0.026775508 0.025958138 0.020945677 0.009365724 Dibenz(a,h)anthracene 0.004891752 0.004637692 0.00386727 0.002574328 Benzo(g,h,i)perylene 0.024241295 0.022681871 0.018896146 0.013439828 Formaldehyde 1.95354907 1.941971678 1.95354907 1.95354907 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.87855E-08 1.29376E-08 1.15421E-08 1.87855E-08 1,2,3,7,8-Pentachlorodibenzo-dioxin 2.28588E-08 1.48809E-08 1.35644E-08 2.28588E-08 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.63401E-08 1.09035E-08 9.88542E-09 1.63401E-08 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.58898E-08 1.06149E-08 9.63092E-09 1.58898E-08 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.67029E-08 1.13087E-08 1.02974E-08 1.67029E-08 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 3.0735E-08 2.06283E-08 1.90693E-08 3.0735E-08 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 2.62633E-07 1.76898E-07 1.68675E-07 2.62633E-07 2,3,7,8-Tetrachlorodibenzofuran 2.61687E-08 1.76428E-08 1.58494E-08 2.61687E-08 1,2,3,7,8-Pentachlorodibenzofuran 1.81734E-08 1.17606E-08 1.07668E-08 1.81734E-08 2,3,4,7,8-Pentachlorodibenzofuran 2.65842E-08 1.64808E-08 1.53113E-08 2.65842E-08 1,2,3,4,7,8-Hexachlorodibenzofuran 1.84168E-08 1.20542E-08 1.09504E-08 1.84168E-08 1,2,3,6,7,8-Hexachlorodibenzofuran 1.4153E-08 9.22856E-09 8.421E-09 1.4153E-08 2,3,4,6,7,8-Hexachlorodibenzofuran 1.99344E-08 1.25594E-08 1.15596E-08 1.99344E-08 1,2,3,7,8,9-Hexachlorodibenzofuran 1.71412E-08 1.12999E-08 1.02759E-08 1.71412E-08 1,2,3,4,6,7,8-Heptachlorodibenzofuran 3.61791E-08 2.18036E-08 2.0367E-08 3.61791E-08 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.71418E-08 1.16884E-08 1.05353E-08 1.71418E-08 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 4.44311E-08 2.98937E-08 2.69105E-08 4.44311E-08 Polychlorinated biphenyls 5.91375E-06 3.89635E-06 3.52929E-06 5.91375E-06 Total HAP 136.4380879 75.74804532 71.46832085 129.1122701 PM Total 256.6230948 110.9558484 99.63105828 261.8837409

Page 6 of 6Felman EF

**Baseline (tpy) Enhanced Capture**  **(tpy) Building** 

**Ventilation (tpy)** Baghouse Control Efficiency (particulate,metals) 0.98 0.98 0.98 Baghouse Control Efficiency (organics) 0.5 0.5 0.5 Baghouse Control Efficiency (Hg) 0.15 0.15 0.15 Furnace Capture Efficiency 0.98 0.99 0.98Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". Tapping Capture Efficiency 0.7 0.8 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". Crushing Capture Efficiency 0.85 0.85 0.99 Casting Capture Efficiency 0.4 0.8 0.99 Secondary Furnace Capture Efficiency N/A 0.75 N/A Secondary Crushing Capture Efficiency N/A 0.75 N/A Mn Fraction (Tapping) 0.23 0.23 0.23 Mn Fraction (Casting) 0.23 0.23 0.23 Mn Fraction (Crushing) 0.372 0.372 0.372

Unit Description Pollutant Description Baseline (tpy) Enhanced Capture (tpy) Building Ventilation

(tpy) Baseline (Emission Factor Approach) Description Enhanced Local Capture Description Building Ventilation Description ELECTRIC ARC FURNACE NO. 2 PM Filterable 14.52688539 14.84552079 14.52688539Based on 7/2010, 4/2011, 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Hydrochloric Acid 3.48444476 7.305867689 3.48444476Based on 7/2010, 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Hydrogen Fluoride 2.192308518 4.59663363 2.192308518Based on 7/2010 stack test Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Formaldehyde 0.3309309 0.548610296 0.3309309Based on 7/2010, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Arsenic 0.00276816 0.002828877 0.00276816Based on 7/2010, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Cadmium 0.00031098 0.000317801 0.00031098Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Chromium 0.01207566 0.01234053 0.01207566Based on 7/2010, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Lead 0.18124002 0.185215372 0.18124002Based on 7/2010, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Manganese 1.25652345 1.310239313 1.25652345Based on 7/2010, 4/2011, 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Mercury 0.0107383 0.010849385 0.0107383Based on 7/2010, 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline 21.4766 ELECTRIC ARC FURNACE NO. 2 Nickel 0.08204835 0.083848014 0.08204835Based on 7/2010, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Chromium (VI) 0.001553107 0.001587173 0.001553107Based on 7/2010 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Naphthalene 0.0843588 0.115105541 0.0843588Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 2-Methylnaphthalene 0.07208823 0.095639593 0.07208823Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Acenaphthylene 0.01076166 0.018641503 0.01076166Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Acenaphthene 0.00664008 0.010798541 0.00664008Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Fluorene 0.00855414 0.013552188 0.00855414Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Phenanthrene 0.04739817 0.068671832 0.04739817Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Anthracene 0.00296745 0.005662297 0.00296745Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Fluoranthene 0.05360463 0.068162225 0.05360463Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Pyrene 0.02944674 0.037883373 0.02944674Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Benzo(a)anthracene 0.00235206 0.003068817 0.00235206Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Chrysene 0.017739 0.022181582 0.017739Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Benzo(b)fluoranthene 0.00264771 0.003405203 0.00264771Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Benzo(k)fluoranthene 0.00088695 0.001163158 0.00088695Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Benzo(e)pyrene 0.00188559 0.002507195 0.00188559Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Benzo(a)pyrene 0.00005256 0.000115035 0.00005256Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Perylene 0.00003066 4.50185E-05 0.00003066Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Indeno(1,2,3-cd)pyrene 0.00011169 0.000170135 0.00011169Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Dibenz(a,h)anthracene 0.00003066 4.85998E-05 0.00003066Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Benzo(g,h,i)perylene 0.00014673 0.000256375 0.00014673Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 2,3,7,8-Tetrachlorodibenzo-p-dioxin 4.60799E-09 6.00813E-09 4.60799E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,7,8-Pentachlorodibenzo-dioxin 4.64806E-09 6.17512E-09 4.64806E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 5.14653E-09 6.65046E-09 5.14653E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 4.97918E-09 6.4348E-09 4.97918E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 5.0219E-09 6.49206E-09 5.0219E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.58724E-08 2.014E-08 1.58724E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 4.19163E-08 5.62513E-08 4.19163E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 2,3,7,8-Tetrachlorodibenzofuran 1.32898E-07 1.64554E-07 1.32898E-07Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,7,8-Pentachlorodibenzofuran 3.04535E-08 3.7951E-08 3.04535E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 2,3,4,7,8-Pentachlorodibenzofuran 3.47108E-08 4.34109E-08 3.47108E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,7,8-Hexachlorodibenzofuran 3.96712E-08 4.93298E-08 3.96712E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,6,7,8-Hexachlorodibenzofuran 1.59753E-08 1.99935E-08 1.59753E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 2,3,4,6,7,8-Hexachlorodibenzofuran 1.3513E-08 1.7089E-08 1.3513E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,7,8,9-Hexachlorodibenzofuran 5.56714E-09 7.19238E-09 5.56714E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,6,7,8-Heptachlorodibenzofuran 3.21526E-08 4.04897E-08 3.21526E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,7,8,9-Heptachlorodibenzofuran 4.84931E-09 6.28348E-09 4.84931E-09Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.98886E-08 2.53496E-08 1.98886E-08Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 2 Polychlorinated biphenyls 3.52996E-05 4.36945E-05 3.52996E-05Based on 3/2013 stack test data Change based on increased capture of fugitives No change from baseline

ELECTRIC ARC FURNACE NO. 5 PM Filterable 13.20106012 13.41521644 13.20106012Based on 4/2011, 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Hydrochloric Acid 0.35121249 0.636092543 0.35121249Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Hydrogen Fluoride 1.992223093 3.60818106 1.992223093Used pollutant/PM ratio from EAF #2 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Formaldehyde 0.30913164 0.485097852 0.30913164Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Arsenic 0.00070956 0.000721071 0.00070956Based on 3/2013 stack test Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Cadmium 0.0001752 0.000178042 0.0001752Based on 3/2013 stack test Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Chromium 0.01028862 0.010455529 0.01028862Based on 3/2013 stack test Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Lead 0.0173229 0.017603924 0.0173229Based on 3/2013 stack test Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Manganese 0.77268894 0.800695195 0.77268894Based on 4/2011, 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Mercury 0.00219438 0.002220104 0.00219438Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline 4.38876 ELECTRIC ARC FURNACE NO. 5 Nickel 0.00461214 0.004686961 0.00461214Based on 3/2013 stack test Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Chromium (VI) 0.00141136 0.001434256 0.00141136Used pollutant/PM ratio from EAF #2 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Naphthalene 0.05462955 0.072870695 0.05462955Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 2-Methylnaphthalene 0.03837099 0.05065994 0.03837099Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Acenaphthylene 0.02058381 0.028065272 0.02058381Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Acenaphthene 0.01179753 0.015853504 0.01179753Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Fluorene 0.01698783 0.022455187 0.01698783Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Phenanthrene 0.07204443 0.093977372 0.07204443Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Anthracene 0.00663789 0.009185071 0.00663789Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Fluoranthene 0.04942173 0.061999379 0.04942173Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Pyrene 0.03377199 0.042453348 0.03377199Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Benzo(a)anthracene 0.0024528 0.003110013 0.0024528Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Chrysene 0.00907755 0.011346286 0.00907755Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Benzo(b)fluoranthene 0.00265209 0.003341892 0.00265209Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Benzo(k)fluoranthene 0.00054969 0.000712385 0.00054969Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Benzo(e)pyrene 0.00211116 0.002695284 0.00211116Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Benzo(a)pyrene 0.00007227 0.000114053 0.00007227Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Perylene 0.00002628 3.59937E-05 0.00002628Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Indeno(1,2,3-cd)pyrene 0.00006132 9.1668E-05 0.00006132Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Dibenz(a,h)anthracene 0.00002409 3.50626E-05 0.00002409Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Benzo(g,h,i)perylene 0.0000876 0.000145391 0.0000876Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.571E-08 1.95548E-08 1.571E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.00127E-08 1.25786E-08 1.00127E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 4.31539E-09 5.47475E-09 4.31539E-09Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 4.86652E-09 6.15076E-09 4.86652E-09Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 6.82202E-09 8.56744E-09 6.82202E-09Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.382E-08 1.7332E-08 1.382E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 4.25821E-08 5.48024E-08 4.25821E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 2,3,7,8-Tetrachlorodibenzofuran 3.25245E-07 4.01808E-07 3.25245E-07Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,7,8-Pentachlorodibenzofuran 5.77168E-08 7.1436E-08 5.77168E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 2,3,4,7,8-Pentachlorodibenzofuran 4.90048E-08 6.078E-08 4.90048E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,7,8-Hexachlorodibenzofuran 3.36467E-08 4.17157E-08 3.36467E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,6,7,8-Hexachlorodibenzofuran 1.69287E-08 2.10349E-08 1.69287E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 2,3,4,6,7,8-Hexachlorodibenzofuran 8.48754E-09 1.06798E-08 8.48754E-09Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,7,8,9-Hexachlorodibenzofuran 3.32291E-09 4.26053E-09 3.32291E-09Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.43288E-08 1.80833E-08 1.43288E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,7,8,9-Heptachlorodibenzofuran 3.39156E-09 4.33411E-09 3.39156E-09Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 3.12873E-08 3.90229E-08 3.12873E-08Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 5 Polychlorinated biphenyls 4.847E-05 5.99002E-05 4.847E-05Based on 8/2012, 3/2013 stack test data Change based on increased capture of fugitives No change from baseline

ELECTRIC ARC FURNACE NO. 7 PM Filterable 21.72644031 22.02063081 21.72644031Based on 4/2011, 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Hydrochloric Acid 0.85687254 1.437003841 0.85687254Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Hydrogen Fluoride 3.278821226 5.498692601 3.278821226Used pollutant/PM ratio from Furnace 2 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Formaldehyde 0.61088736 0.928494012 0.61088736Based on 7/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Arsenic 0.001167801 0.001183614 0.001167801Used pollutant/PM ratio from Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Cadmium 0.000288346 0.00029225 0.000288346Used pollutant/PM ratio from Furnace 5 Change based on increased capture of fugitives No change from baseline

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ELECTRIC ARC FURNACE NO. 7 Chromium 0.016933116 0.017162402 0.016933116Used pollutant/PM ratio from Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Lead 0.028510207 0.028896254 0.028510207Used pollutant/PM ratio from Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Manganese 2.48371842 2.5277874 2.48371842Based on 4/2011 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Mercury 0.00446322 0.004510217 0.00446322Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Nickel 0.007590707 0.007693491 0.007590707Used pollutant/PM ratio from Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Chromium (VI) 0.00232283 0.002354283 0.00232283Used pollutant/PM ratio from Furnace 2 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Naphthalene 0.0358722 0.04971111 0.0358722Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 2-Methylnaphthalene 0.03419466 0.045503451 0.03419466Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Acenaphthylene 0.02696766 0.035947373 0.02696766Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Acenaphthene 0.01637682 0.021507525 0.01637682Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Fluorene 0.0201699 0.02638407 0.0201699Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Phenanthrene 0.04599438 0.061813535 0.04599438Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Anthracene 0.00768252 0.010474869 0.00768252Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Fluoranthene 0.03230688 0.040867778 0.03230688Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Pyrene 0.02753268 0.03474971 0.02753268Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Benzo(a)anthracene 0.00278568 0.003521018 0.00278568Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Chrysene 0.01288158 0.016043098 0.01288158Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Benzo(b)fluoranthene 0.00266304 0.003355411 0.00266304Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Benzo(k)fluoranthene 0.00063948 0.000823248 0.00063948Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Benzo(e)pyrene 0.0022776 0.002900787 0.0022776Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Benzo(a)pyrene 0.000219 0.000295219 0.000219Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Perylene 0.00004818 6.30335E-05 0.00004818Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Indeno(1,2,3-cd)pyrene 0.00017958 0.000237683 0.00017958Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Dibenz(a,h)anthracene 0.00003942 5.39905E-05 0.00003942Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Benzo(g,h,i)perylene 0.00016206 0.000237327 0.00016206Based on 8/2012 stack test data Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.571E-08 1.95548E-08 1.571E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.00127E-08 1.25786E-08 1.00127E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 4.31539E-09 5.47475E-09 4.31539E-09Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 4.86652E-09 6.15076E-09 4.86652E-09Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 6.82202E-09 8.56744E-09 6.82202E-09Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.382E-08 1.7332E-08 1.382E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 4.25821E-08 5.48024E-08 4.25821E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 2,3,7,8-Tetrachlorodibenzofuran 3.25245E-07 4.01808E-07 3.25245E-07Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,7,8-Pentachlorodibenzofuran 5.77168E-08 7.1436E-08 5.77168E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 2,3,4,7,8-Pentachlorodibenzofuran 4.90048E-08 6.078E-08 4.90048E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,7,8-Hexachlorodibenzofuran 3.36467E-08 4.17157E-08 3.36467E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,6,7,8-Hexachlorodibenzofuran 1.69287E-08 2.10349E-08 1.69287E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 2,3,4,6,7,8-Hexachlorodibenzofuran 8.48754E-09 1.06798E-08 8.48754E-09Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,7,8,9-Hexachlorodibenzofuran 3.32291E-09 4.26053E-09 3.32291E-09Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.43288E-08 1.80833E-08 1.43288E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,7,8,9-Heptachlorodibenzofuran 3.39156E-09 4.33411E-09 3.39156E-09Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 3.12873E-08 3.90229E-08 3.12873E-08Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline ELECTRIC ARC FURNACE NO. 7 Polychlorinated biphenyls 4.847E-05 5.99002E-05 4.847E-05Assumed emission were the same as Furnace 5 Change based on increased capture of fugitives No change from baseline

CRUSHING AND SCREENING SYSTEM #1 PM Filterable 0 0 0Assumed system is not operating No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #1 Arsenic 0 0 0Assumed system is not operating No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #1 Chromium 0 0 0Assumed system is not operating No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #1 Chromium (VI) 0 0 0Assumed system is not operating No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #1 Lead 0 0 0Assumed system is not operating No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #1 Manganese 0 0 0Assumed system is not operating No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #1 Nickel 0 0 0Assumed system is not operating No change from baseline No change from baseline

CRUSHING AND SCREENING SYSTEM #2 PM Filterable 0.392785869 0.392785869 0.392785869Based on 7/2010 ICR stack test No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #2 Arsenic 0 0 0Based on 7/2010 ICR stack test No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #2 Chromium 0.000205666 0.000205666 0.000205666Based on 7/2010 ICR stack test No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #2 Chromium (VI) 2.64517E-05 2.64517E-05 2.64517E-05Based on 7/2010 ICR stack test No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #2 Lead 0.00046341 0.00046341 0.00046341Based on 7/2010 ICR stack test No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #2 Manganese 0.21024 0.21024 0.21024Based on 7/2010 ICR stack test No change from baseline No change from baseline CRUSHING AND SCREENING SYSTEM #2 Nickel 0 0 0Based on 7/2010 ICR stack test No change from baseline No change from baseline

ELECTRIC ARC FURNACE NO. 2 FUGITIVES PM Filterable 13.63748424 1.70468553 0.136374842Calculated using mass balance approach Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Hydrochloric Acid 3.271111407 0.408888926 0.032711114Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Hydrogen Fluoride 2.058085548 0.257260693 0.020580855Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Formaldehyde 0.310669824 0.038833728 0.003106698Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Arsenic 0.002598681 0.000324835 2.59868E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Cadmium 0.00029194 3.64926E-05 2.9194E-06Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Chromium 0.011336334 0.001417042 0.000113363Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Lead 0.170143692 0.021267962 0.001701437Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Manganese 1.179593443 0.14744918 0.011795934Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Mercury 0.0002369 2.96125E-05 2.369E-06Calculated using Hg/PM and control device ratio Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Nickel 0.077024982 0.009628123 0.00077025Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Chromium (VI) 0.001458019 0.000182252 1.45802E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Naphthalene 0.079193976 0.009899247 0.00079194Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 2-Methylnaphthalene 0.067674665 0.008459333 0.000676747Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Acenaphthylene 0.010102783 0.001262848 0.000101028Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Acenaphthene 0.006233544 0.000779193 6.23354E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Fluorene 0.008030417 0.001003802 8.03042E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Phenanthrene 0.044496241 0.00556203 0.000444962Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Anthracene 0.002785769 0.000348221 2.78577E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Fluoranthene 0.050322714 0.006290339 0.000503227Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Pyrene 0.027643878 0.003455485 0.000276439Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Benzo(a)anthracene 0.002208056 0.000276007 2.20806E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Chrysene 0.016652939 0.002081617 0.000166529Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Benzo(b)fluoranthene 0.002485605 0.000310701 2.48561E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Benzo(k)fluoranthene 0.000832647 0.000104081 8.32647E-06Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Benzo(e)pyrene 0.001770146 0.000221268 1.77015E-05Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Benzo(a)pyrene 4.9342E-05 6.16776E-06 4.9342E-07Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Perylene 2.87829E-05 3.59786E-06 2.87829E-07Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Indeno(1,2,3-cd)pyrene 0.000104852 1.31065E-05 1.04852E-06Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Dibenz(a,h)anthracene 2.87829E-05 3.59786E-06 2.87829E-07Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Benzo(g,h,i)perylene 0.000137747 1.72183E-05 1.37747E-06Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 2,3,7,8-Tetrachlorodibenzo-p-dioxin 4.32587E-09 5.40733E-10 4.32587E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,7,8-Pentachlorodibenzo-dioxin 4.36348E-09 5.45435E-10 4.36348E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 4.83144E-09 6.0393E-10 4.83144E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 4.67434E-09 5.84292E-10 4.67434E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 4.71443E-09 5.89304E-10 4.71443E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.49006E-08 1.86258E-09 1.49006E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.935E-08 4.91875E-09 3.935E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 2,3,7,8-Tetrachlorodibenzofuran 1.24761E-07 1.55952E-08 1.24761E-09Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,7,8-Pentachlorodibenzofuran 2.8589E-08 3.57362E-09 2.8589E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 2,3,4,7,8-Pentachlorodibenzofuran 3.25856E-08 4.07321E-09 3.25856E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzofuran 3.72423E-08 4.65529E-09 3.72423E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzofuran 1.49972E-08 1.87465E-09 1.49972E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 2,3,4,6,7,8-Hexachlorodibenzofuran 1.26857E-08 1.58571E-09 1.26857E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzofuran 5.22629E-09 6.53287E-10 5.22629E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzofuran 3.01841E-08 3.77301E-09 3.01841E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,7,8,9-Heptachlorodibenzofuran 4.55241E-09 5.69051E-10 4.55241E-11Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.86709E-08 2.33386E-09 1.86709E-10Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 FUGITIVES Polychlorinated biphenyls 3.31384E-05 4.1423E-06 3.31384E-07Used pollutant/PM ratio from Furnace 2 Increased local capture to 99%, added building capture Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 5 FUGITIVES PM Filterable 12.39283195 1.549103994 0.123928319Calculated using mass balance approach Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Hydrochloric Acid 0.329709684 0.041213711 0.003297097Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Hydrogen Fluoride 1.870250251 0.233781281 0.018702503Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Formaldehyde 0.290205213 0.036275652 0.002902052Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Arsenic 0.000666118 8.32647E-05 6.66118E-06Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Cadmium 0.000164473 2.05592E-05 1.64473E-06Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Chromium 0.009658704 0.001207338 9.6587E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Lead 0.016262314 0.002032789 0.000162623Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Manganese 0.725381454 0.090672682 0.007253815Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Mercury 4.84107E-05 6.05134E-06 4.84107E-07Calculated using Hg/PM and control device ratio Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Nickel 0.004329764 0.000541221 4.32976E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99%

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ELECTRIC ARC FURNACE NO. 5 FUGITIVES Chromium (VI) 0.00132495 0.000165619 1.32495E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Naphthalene 0.051284884 0.00641061 0.000512849Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 2-Methylnaphthalene 0.036021746 0.004502718 0.000360217Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Acenaphthylene 0.019323577 0.002415447 0.000193236Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Acenaphthene 0.011075232 0.001384404 0.000110752Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Fluorene 0.015947759 0.00199347 0.000159478Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Phenanthrene 0.067633547 0.008454193 0.000676335Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Anthracene 0.006231489 0.000778936 6.23149E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Fluoranthene 0.04639591 0.005799489 0.000463959Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Pyrene 0.031704317 0.00396304 0.000317043Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Benzo(a)anthracene 0.002302629 0.000287829 2.30263E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Chrysene 0.008521782 0.001065223 8.52178E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Benzo(b)fluoranthene 0.002489717 0.000311215 2.48972E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Benzo(k)fluoranthene 0.000516036 6.45044E-05 5.16036E-06Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Benzo(e)pyrene 0.001981905 0.000247738 1.98191E-05Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Benzo(a)pyrene 6.78453E-05 8.48066E-06 6.78453E-07Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Perylene 2.4671E-05 3.08388E-06 2.4671E-07Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Indeno(1,2,3-cd)pyrene 5.75657E-05 7.19571E-06 5.75657E-07Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Dibenz(a,h)anthracene 2.26151E-05 2.82689E-06 2.26151E-07Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Benzo(g,h,i)perylene 8.22367E-05 1.02796E-05 8.22367E-07Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.47482E-08 1.84352E-09 1.47482E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,7,8-Pentachlorodibenzo-dioxin 9.39969E-09 1.17496E-09 9.39969E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 4.05118E-09 5.06398E-10 4.05118E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 4.56857E-09 5.71071E-10 4.56857E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 6.40435E-09 8.00543E-10 6.40435E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.29739E-08 1.62173E-09 1.29739E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.9975E-08 4.99688E-09 3.9975E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 2,3,7,8-Tetrachlorodibenzofuran 3.05332E-07 3.81665E-08 3.05332E-09Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,7,8-Pentachlorodibenzofuran 5.41832E-08 6.77289E-09 5.41832E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 2,3,4,7,8-Pentachlorodibenzofuran 4.60045E-08 5.75056E-09 4.60045E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzofuran 3.15867E-08 3.94833E-09 3.15867E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzofuran 1.58923E-08 1.98653E-09 1.58923E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 2,3,4,6,7,8-Hexachlorodibenzofuran 7.9679E-09 9.95987E-10 7.9679E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzofuran 3.11947E-09 3.89933E-10 3.11947E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.34516E-08 1.68144E-09 1.34516E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,7,8,9-Heptachlorodibenzofuran 3.18391E-09 3.97989E-10 3.18391E-11Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 2.93717E-08 3.67146E-09 2.93717E-10Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 FUGITIVES Polychlorinated biphenyls 4.55024E-05 5.6878E-06 4.55024E-07Used pollutant/PM ratio from Furnace 5 Increased local capture to 99%, added building capture Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 7 FUGITIVES PM Filterable 20.39625009 2.549531261 0.203962501Calculated using mass balance approach Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Hydrochloric Acid 0.804410956 0.100551369 0.00804411Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Hydrogen Fluoride 3.078077069 0.384759634 0.030780771Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Formaldehyde 0.573486093 0.071685762 0.005734861Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Arsenic 0.001096303 0.000137038 1.0963E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Cadmium 0.000270692 3.38365E-05 2.70692E-06Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Chromium 0.015896395 0.001987049 0.000158964Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Lead 0.026764684 0.003345585 0.000267647Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Manganese 2.331654027 0.291456753 0.02331654Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Mercury 9.84641E-05 1.2308E-05 9.84641E-07Calculated using Hg/PM and control device ratio Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Nickel 0.00712597 0.000890746 7.12597E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Chromium (VI) 0.002180616 0.000272577 2.18062E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Naphthalene 0.033675943 0.004209493 0.000336759Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 2-Methylnaphthalene 0.032101109 0.004012639 0.000321011Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Acenaphthylene 0.025316579 0.003164572 0.000253166Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Acenaphthene 0.015374158 0.00192177 0.000153742Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Fluorene 0.018935008 0.002366876 0.00018935Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Phenanthrene 0.043178398 0.0053973 0.000431784Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Anthracene 0.007212162 0.00090152 7.21216E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Fluoranthene 0.030328908 0.003791113 0.000303289Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Pyrene 0.025847006 0.003230876 0.00025847Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Benzo(a)anthracene 0.002615128 0.000326891 2.61513E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Chrysene 0.012092912 0.001511614 0.000120929Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Benzo(b)fluoranthene 0.002499997 0.0003125 2.5E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Benzo(k)fluoranthene 0.000600328 7.5041E-05 6.00328E-06Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Benzo(e)pyrene 0.002138155 0.000267269 2.13816E-05Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Benzo(a)pyrene 0.000205592 2.5699E-05 2.05592E-06Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Perylene 4.52302E-05 5.65378E-06 4.52302E-07Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Indeno(1,2,3-cd)pyrene 0.000168585 2.10732E-05 1.68585E-06Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Dibenz(a,h)anthracene 3.70065E-05 4.62582E-06 3.70065E-07Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Benzo(g,h,i)perylene 0.000152138 1.90172E-05 1.52138E-06Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.47482E-08 1.84352E-09 1.47482E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,7,8-Pentachlorodibenzo-dioxin 9.39969E-09 1.17496E-09 9.39969E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 4.05118E-09 5.06398E-10 4.05118E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 4.56857E-09 5.71071E-10 4.56857E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 6.40435E-09 8.00543E-10 6.40435E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.29739E-08 1.62173E-09 1.29739E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.9975E-08 4.99688E-09 3.9975E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 2,3,7,8-Tetrachlorodibenzofuran 3.05332E-07 3.81665E-08 3.05332E-09Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,7,8-Pentachlorodibenzofuran 5.41832E-08 6.77289E-09 5.41832E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 2,3,4,7,8-Pentachlorodibenzofuran 4.60045E-08 5.75056E-09 4.60045E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzofuran 3.15867E-08 3.94833E-09 3.15867E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzofuran 1.58923E-08 1.98653E-09 1.58923E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 2,3,4,6,7,8-Hexachlorodibenzofuran 7.9679E-09 9.95987E-10 7.9679E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzofuran 3.11947E-09 3.89933E-10 3.11947E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.34516E-08 1.68144E-09 1.34516E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,7,8,9-Heptachlorodibenzofuran 3.18391E-09 3.97989E-10 3.18391E-11Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 2.93717E-08 3.67146E-09 2.93717E-10Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 FUGITIVES Polychlorinated biphenyls 4.55024E-05 5.6878E-06 4.55024E-07Used pollutant/PM ratio from Furnace 7 Increased local capture to 99%, added building capture Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES PM Filterable 17.25282 2.87547 0.1725282Used 1.3 lb/ton, 10.1 tons/hr and 85% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Hydrochloric Acid 4.13829232 0.689715387 0.041382923Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Hydrogen Fluoride 2.603689864 0.433948311 0.026036899Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Formaldehyde 0.118030819 0.019671803 0.001180308Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Arsenic 0.003287598 0.000547933 3.2876E-05Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Cadmium 0.000369335 6.15558E-05 3.69335E-06Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Chromium 0.014341628 0.002390271 0.000143416Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Lead 0.215249268 0.035874878 0.002152493Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Manganese 3.9681486 0.6613581 0.039681486Used assumed Mn fraction for tapping Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Mercury 2.31695E-05 3.86158E-06 2.31695E-07Used SiMn Hg Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Nickel 0.097444523 0.016240754 0.000974445Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Chromium (VI) 0.001844544 0.000307424 1.84454E-05Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Naphthalene 0.041454528 0.006909088 0.000414545Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 2-Methylnaphthalene 0.025114094 0.004185682 0.000251141Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Acenaphthylene 0.020272986 0.003378831 0.00020273Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Acenaphthene 0.009844942 0.001640824 9.84494E-05Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Fluorene 0.011323039 0.001887173 0.00011323Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Phenanthrene 0.038430531 0.006405088 0.000384305Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Anthracene 0.007566774 0.001261129 7.56677E-05Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Fluoranthene 0.00748541 0.001247568 7.48541E-05Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Pyrene 0.005776784 0.000962797 5.77678E-05Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Benzo(a)anthracene 0.000623784 0.000103964 6.23784E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Chrysene 0.001057721 0.000176287 1.05772E-05Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Benzo(b)fluoranthene 0.0005153 8.58833E-05 5.153E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Benzo(k)fluoranthene 0.00025765 4.29417E-05 2.5765E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Benzo(e)pyrene 0.000678026 0.000113004 6.78026E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Benzo(a)pyrene 0.000189847 3.16412E-05 1.89847E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Perylene 2.71211E-05 4.52018E-06 2.71211E-07Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Indeno(1,2,3-cd)pyrene 0.000122045 2.03408E-05 1.22045E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Dibenz(a,h)anthracene 4.06816E-05 6.78026E-06 4.06816E-07Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Benzo(g,h,i)perylene 0.000284771 4.74618E-05 2.84771E-06Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.91203E-09 3.18672E-10 1.91203E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99%

Page 3 of 7Felman EF

ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,7,8-Pentachlorodibenzo-dioxin 2.61718E-09 4.36197E-10 2.61718E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.77643E-09 2.96071E-10 1.77643E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.72219E-09 2.87031E-10 1.72219E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.74931E-09 2.91551E-10 1.74931E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 3.25453E-09 5.42421E-10 3.25453E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 2.69854E-08 4.49757E-09 2.69854E-10Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 2,3,7,8-Tetrachlorodibenzofuran 2.79347E-09 4.65578E-10 2.79347E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,7,8-Pentachlorodibenzofuran 2.10188E-09 3.50314E-10 2.10188E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 2,3,4,7,8-Pentachlorodibenzofuran 3.32233E-09 5.53721E-10 3.32233E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzofuran 2.08832E-09 3.48054E-10 2.08832E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzofuran 1.6137E-09 2.6895E-10 1.6137E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 2,3,4,6,7,8-Hexachlorodibenzofuran 2.42733E-09 4.04556E-10 2.42733E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzofuran 1.91203E-09 3.18672E-10 1.91203E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzofuran 4.74618E-09 7.91031E-10 4.74618E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.77643E-09 2.96071E-10 1.77643E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 4.75974E-09 7.93291E-10 4.75974E-11Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 TAPPING FUGITIVES Polychlorinated biphenyls 6.62066E-07 1.10344E-07 6.62066E-09Used Org HAP Tap EF, 10.1 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES PM Filterable 8.541 1.4235 0.08541Used 1.3 lb/ton, 5 tons/hr and 85% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Hydrochloric Acid 0.227232196 0.037872033 0.002272322Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Hydrogen Fluoride 1.288955378 0.214825896 0.012889554Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Formaldehyde 0.058431098 0.009738516 0.000584311Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Arsenic 0.000459081 7.65135E-05 4.59081E-06Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Cadmium 0.000113353 1.88922E-05 1.13353E-06Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Chromium 0.00665667 0.001109445 6.65667E-05Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Lead 0.011207804 0.001867967 0.000112078Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Manganese 1.96443 0.327405 0.0196443Used assumed Mn fraction for tapping Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Mercury 1.147E-05 1.91167E-06 1.147E-07Used SiMn Hg Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Nickel 0.002984025 0.000497337 2.98402E-05Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Chromium (VI) 0.000913141 0.00015219 9.13141E-06Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Naphthalene 0.020522044 0.003420341 0.00020522Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 2-Methylnaphthalene 0.01243272 0.00207212 0.000124327Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Acenaphthylene 0.010036132 0.001672689 0.000100361Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Acenaphthene 0.004873734 0.000812289 4.87373E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Fluorene 0.005605465 0.000934244 5.60546E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Phenanthrene 0.019025015 0.003170836 0.00019025Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Anthracene 0.003745927 0.000624321 3.74593E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Fluoranthene 0.003705649 0.000617608 3.70565E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Pyrene 0.002859794 0.000476632 2.85979E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Benzo(a)anthracene 0.000308804 5.14673E-05 3.08804E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Chrysene 0.000523624 8.72707E-05 5.23624E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Benzo(b)fluoranthene 0.000255099 4.25165E-05 2.55099E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Benzo(k)fluoranthene 0.00012755 2.12583E-05 1.2755E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Benzo(e)pyrene 0.000335657 5.59428E-05 3.35657E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Benzo(a)pyrene 9.39838E-05 1.5664E-05 9.39838E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Perylene 1.34263E-05 2.23771E-06 1.34263E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Indeno(1,2,3-cd)pyrene 6.04182E-05 1.00697E-05 6.04182E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Dibenz(a,h)anthracene 2.01394E-05 3.35657E-06 2.01394E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Benzo(g,h,i)perylene 0.000140976 2.3496E-05 1.40976E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 2,3,7,8-Tetrachlorodibenzo-p-dioxin 9.46552E-10 1.57759E-10 9.46552E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.29563E-09 2.15939E-10 1.29563E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 8.7942E-10 1.4657E-10 8.7942E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 8.52568E-10 1.42095E-10 8.52568E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 8.65994E-10 1.44332E-10 8.65994E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.61115E-09 2.68525E-10 1.61115E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 1.33591E-08 2.22652E-09 1.33591E-10Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 2,3,7,8-Tetrachlorodibenzofuran 1.38291E-09 2.30484E-10 1.38291E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,7,8-Pentachlorodibenzofuran 1.04054E-09 1.73423E-10 1.04054E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 2,3,4,7,8-Pentachlorodibenzofuran 1.64472E-09 2.7412E-10 1.64472E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzofuran 1.03382E-09 1.72304E-10 1.03382E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzofuran 7.98863E-10 1.33144E-10 7.98863E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 2,3,4,6,7,8-Hexachlorodibenzofuran 1.20165E-09 2.00275E-10 1.20165E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzofuran 9.46552E-10 1.57759E-10 9.46552E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzofuran 2.3496E-09 3.91599E-10 2.3496E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,7,8,9-Heptachlorodibenzofuran 8.7942E-10 1.4657E-10 8.7942E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 2.35631E-09 3.92718E-10 2.35631E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 TAPPING FUGITIVES Polychlorinated biphenyls 3.27755E-07 5.46259E-08 3.27755E-09Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES PM Filterable 8.541 1.4235 0.08541Used 1.3 lb/ton, 5 tons/hr and 85% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Hydrochloric Acid 0.336849859 0.056141643 0.003368499Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Hydrogen Fluoride 1.288955378 0.214825896 0.012889554Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Formaldehyde 0.058431098 0.009738516 0.000584311Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Arsenic 0.000459081 7.65135E-05 4.59081E-06Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Cadmium 0.000113353 1.88922E-05 1.13353E-06Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Chromium 0.00665667 0.001109445 6.65667E-05Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Lead 0.011207804 0.001867967 0.000112078Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Manganese 1.96443 0.327405 0.0196443Used assumed Mn fraction for tapping Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Mercury 1.147E-05 1.91167E-06 1.147E-07Used SiMn Hg Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Nickel 0.002984025 0.000497337 2.98402E-05Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Chromium (VI) 0.000913141 0.00015219 9.13141E-06Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Naphthalene 0.020522044 0.003420341 0.00020522Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 2-Methylnaphthalene 0.01243272 0.00207212 0.000124327Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Acenaphthylene 0.010036132 0.001672689 0.000100361Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Acenaphthene 0.004873734 0.000812289 4.87373E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Fluorene 0.005605465 0.000934244 5.60546E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Phenanthrene 0.019025015 0.003170836 0.00019025Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Anthracene 0.003745927 0.000624321 3.74593E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Fluoranthene 0.003705649 0.000617608 3.70565E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Pyrene 0.002859794 0.000476632 2.85979E-05Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Benzo(a)anthracene 0.000308804 5.14673E-05 3.08804E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Chrysene 0.000523624 8.72707E-05 5.23624E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Benzo(b)fluoranthene 0.000255099 4.25165E-05 2.55099E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Benzo(k)fluoranthene 0.00012755 2.12583E-05 1.2755E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Benzo(e)pyrene 0.000335657 5.59428E-05 3.35657E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Benzo(a)pyrene 9.39838E-05 1.5664E-05 9.39838E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Perylene 1.34263E-05 2.23771E-06 1.34263E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Indeno(1,2,3-cd)pyrene 6.04182E-05 1.00697E-05 6.04182E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Dibenz(a,h)anthracene 2.01394E-05 3.35657E-06 2.01394E-07Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Benzo(g,h,i)perylene 0.000140976 2.3496E-05 1.40976E-06Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 2,3,7,8-Tetrachlorodibenzo-p-dioxin 9.46552E-10 1.57759E-10 9.46552E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.29563E-09 2.15939E-10 1.29563E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 8.7942E-10 1.4657E-10 8.7942E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 8.52568E-10 1.42095E-10 8.52568E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 8.65994E-10 1.44332E-10 8.65994E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.61115E-09 2.68525E-10 1.61115E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 1.33591E-08 2.22652E-09 1.33591E-10Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 2,3,7,8-Tetrachlorodibenzofuran 1.38291E-09 2.30484E-10 1.38291E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,7,8-Pentachlorodibenzofuran 1.04054E-09 1.73423E-10 1.04054E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 2,3,4,7,8-Pentachlorodibenzofuran 1.64472E-09 2.7412E-10 1.64472E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,7,8-Hexachlorodibenzofuran 1.03382E-09 1.72304E-10 1.03382E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,6,7,8-Hexachlorodibenzofuran 7.98863E-10 1.33144E-10 7.98863E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 2,3,4,6,7,8-Hexachlorodibenzofuran 1.20165E-09 2.00275E-10 1.20165E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,7,8,9-Hexachlorodibenzofuran 9.46552E-10 1.57759E-10 9.46552E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,6,7,8-Heptachlorodibenzofuran 2.3496E-09 3.91599E-10 2.3496E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,7,8,9-Heptachlorodibenzofuran 8.7942E-10 1.4657E-10 8.7942E-12Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 2.35631E-09 3.92718E-10 2.35631E-11Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 TAPPING FUGITIVES Polychlorinated biphenyls 3.27755E-07 5.46259E-08 3.27755E-09Used Org HAP Tap EF, 5 Tons/hr and 70% capture Assumes capture increased from 85% to 95% Assumes building capture of 99%

CRUSHING AND SCREENING SYSTEM #1 FUGITIVES PM Filterable 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #1 FUGITIVES Arsenic 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #1 FUGITIVES Chromium 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99%

Page 4 of 7Felman EF

CRUSHING AND SCREENING SYSTEM #1 FUGITIVES Chromium (VI) 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #1 FUGITIVES Lead 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #1 FUGITIVES Manganese 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #1 FUGITIVES Nickel 0 0 0Assumed system is not operating Installation of secondary 85% fugitive capture Assumes building capture of 99%

CRUSHING AND SCREENING SYSTEM #2 FUGITIVES PM Filterable 8.7437844 2.1859461 0.087437844Calculated using EF from Metallic Minerals Processing Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #2 FUGITIVES Arsenic 0 0 0Used pollutant/PM ratio from Crushing System #2 Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #2 FUGITIVES Chromium 0.004578317 0.001144579 4.57832E-05Used pollutant/PM ratio from Crushing System #2 Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #2 FUGITIVES Chromium (VI) 0.000588839 0.00014721 5.88839E-06Used pollutant/PM ratio from Crushing System #2 Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #2 FUGITIVES Lead 0.010315946 0.002578987 0.000103159Used pollutant/PM ratio from Crushing System #2 Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #2 FUGITIVES Manganese 3.252687797 0.813171949 0.032526878Used assumed Mn fraction for crushing Installation of secondary 85% fugitive capture Assumes building capture of 99% CRUSHING AND SCREENING SYSTEM #2 FUGITIVES Nickel 0 0 0Used pollutant/PM ratio from Crushing System #2 Installation of secondary 85% fugitive capture Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 2 CASTING PM Filterable 5.043132 0.420261 0.05043132Used 0.19 lb/ton 10.1 tons/hr and 50% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Hydrochloric Acid 1.209654678 0.100804557 0.012096547Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Hydrogen Fluoride 0.761078576 0.063423215 0.007610786Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Formaldehyde 0.034501316 0.00287511 0.000345013Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Arsenic 0.00096099 8.00825E-05 9.6099E-06Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Cadmium 0.000107959 8.99661E-06 1.07959E-06Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Chromium 0.004192168 0.000349347 4.19217E-05Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Lead 0.062919017 0.005243251 0.00062919Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Manganese 1.15992036 0.09666003 0.011599204Used assumed Mn fraction for casting Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Mercury 6.77262E-06 5.64385E-07 6.77262E-08Used SiMn Hg Tap EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Nickel 0.028483784 0.002373649 0.000284838Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Chromium (VI) 0.000539174 4.49312E-05 5.39174E-06Used pollutant/PM ratio from Furnace 2 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Naphthalene 0.012117477 0.00100979 0.000121175Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING 2-Methylnaphthalene 0.007341043 0.000611754 7.34104E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Acenaphthylene 0.00592595 0.000493829 5.92595E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Acenaphthene 0.002877752 0.000239813 2.87775E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Fluorene 0.003309811 0.000275818 3.30981E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Phenanthrene 0.01123354 0.000936128 0.000112335Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Anthracene 0.002211826 0.000184319 2.21183E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Fluoranthene 0.002188043 0.000182337 2.18804E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Pyrene 0.001688598 0.000140717 1.6886E-05Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Benzo(a)anthracene 0.000182337 1.51947E-05 1.82337E-06Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Chrysene 0.00030918 2.5765E-05 3.0918E-06Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Benzo(b)fluoranthene 0.000150626 1.25522E-05 1.50626E-06Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Benzo(k)fluoranthene 7.53131E-05 6.27609E-06 7.53131E-07Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Benzo(e)pyrene 0.000198192 1.6516E-05 1.98192E-06Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Benzo(a)pyrene 5.54938E-05 4.62449E-06 5.54938E-07Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Perylene 7.92769E-06 6.60641E-07 7.92769E-08Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Indeno(1,2,3-cd)pyrene 3.56746E-05 2.97288E-06 3.56746E-07Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Dibenz(a,h)anthracene 1.18915E-05 9.90962E-07 1.18915E-07Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 2 CASTING Benzo(g,h,i)perylene 8.32408E-05 6.93673E-06 8.32408E-07Used Org HAP Cast EF, 10.1 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 5 CASTING PM Filterable 2.4966 0.20805 0.024966Used 0.19 lb/ton 5 tons/hr and 50% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Hydrochloric Acid 0.066421719 0.005535143 0.000664217Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Hydrogen Fluoride 0.376771572 0.031397631 0.003767716Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Formaldehyde 0.01707986 0.001423322 0.000170799Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Arsenic 0.000134193 1.11827E-05 1.34193E-06Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Cadmium 3.3134E-05 2.76117E-06 3.3134E-07Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Chromium 0.001945796 0.00016215 1.9458E-05Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Lead 0.003276127 0.000273011 3.27613E-05Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Manganese 0.574218 0.0478515 0.00574218Used assumed Mn fraction for casting Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Mercury 3.35278E-06 2.79398E-07 3.35278E-08Used SiMn Hg Tap EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Nickel 0.000872253 7.26878E-05 8.72253E-06Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Chromium (VI) 0.000266918 2.22432E-05 2.66918E-06Used pollutant/PM ratio from Furnace 5 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Naphthalene 0.005998751 0.000499896 5.99875E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING 2-Methylnaphthalene 0.00363418 0.000302848 3.63418E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Acenaphthylene 0.002933639 0.00024447 2.93364E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Acenaphthene 0.00142463 0.000118719 1.42463E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Fluorene 0.001638521 0.000136543 1.63852E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Phenanthrene 0.005561158 0.00046343 5.56116E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Anthracene 0.001094963 9.1247E-05 1.09496E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Fluoranthene 0.00108319 9.02658E-05 1.08319E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Pyrene 0.00083594 6.96617E-05 8.3594E-06Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Benzo(a)anthracene 9.02658E-05 7.52215E-06 9.02658E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Chrysene 0.000153059 1.2755E-05 1.53059E-06Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Benzo(b)fluoranthene 7.45674E-05 6.21395E-06 7.45674E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Benzo(k)fluoranthene 3.72837E-05 3.10698E-06 3.72837E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Benzo(e)pyrene 9.8115E-05 8.17625E-06 9.8115E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Benzo(a)pyrene 2.74722E-05 2.28935E-06 2.74722E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Perylene 3.9246E-06 3.2705E-07 3.9246E-08Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Indeno(1,2,3-cd)pyrene 1.76607E-05 1.47173E-06 1.76607E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Dibenz(a,h)anthracene 5.8869E-06 4.90575E-07 5.8869E-08Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 5 CASTING Benzo(g,h,i)perylene 4.12083E-05 3.43403E-06 4.12083E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99%

ELECTRIC ARC FURNACE NO. 7 CASTING PM Filterable 2.4966 0.20805 0.024966Used 0.19 lb/ton 5 tons/hr and 50% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Hydrochloric Acid 0.098463805 0.008205317 0.000984638Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Hydrogen Fluoride 0.376771572 0.031397631 0.003767716Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Formaldehyde 0.01707986 0.001423322 0.000170799Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Arsenic 0.000134193 1.11827E-05 1.34193E-06Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Cadmium 3.3134E-05 2.76117E-06 3.3134E-07Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Chromium 0.001945796 0.00016215 1.9458E-05Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Lead 0.003276127 0.000273011 3.27613E-05Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Manganese 0.574218 0.0478515 0.00574218Used assumed Mn fraction for casting Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Mercury 3.35278E-06 2.79398E-07 3.35278E-08Used SiMn Hg Tap EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Nickel 0.000872253 7.26878E-05 8.72253E-06Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Chromium (VI) 0.000266918 2.22432E-05 2.66918E-06Used pollutant/PM ratio from Furnace 7 Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Naphthalene 0.005998751 0.000499896 5.99875E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING 2-Methylnaphthalene 0.00363418 0.000302848 3.63418E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Acenaphthylene 0.002933639 0.00024447 2.93364E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Acenaphthene 0.00142463 0.000118719 1.42463E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Fluorene 0.001638521 0.000136543 1.63852E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Phenanthrene 0.005561158 0.00046343 5.56116E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Anthracene 0.001094963 9.1247E-05 1.09496E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Fluoranthene 0.00108319 9.02658E-05 1.08319E-05Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Pyrene 0.00083594 6.96617E-05 8.3594E-06Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Benzo(a)anthracene 9.02658E-05 7.52215E-06 9.02658E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Chrysene 0.000153059 1.2755E-05 1.53059E-06Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Benzo(b)fluoranthene 7.45674E-05 6.21395E-06 7.45674E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Benzo(k)fluoranthene 3.72837E-05 3.10698E-06 3.72837E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Benzo(e)pyrene 9.8115E-05 8.17625E-06 9.8115E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Benzo(a)pyrene 2.74722E-05 2.28935E-06 2.74722E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Perylene 3.9246E-06 3.2705E-07 3.9246E-08Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Indeno(1,2,3-cd)pyrene 1.76607E-05 1.47173E-06 1.76607E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Dibenz(a,h)anthracene 5.8869E-06 4.90575E-07 5.8869E-08Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99% ELECTRIC ARC FURNACE NO. 7 CASTING Benzo(g,h,i)perylene 4.12083E-05 3.43403E-06 4.12083E-07Used Org HAP Cast EF, 5 Tons/hr and 40% capture Assumes capture increased from 50% to 95% Assumes building capture of 99%

Building Evacuation Baghouse PM Filterable 1.970921753Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Hydrochloric Acid 10.37732516Not installed Not installed Assumed 99% capture Building Evacuation Baghouse Hydrogen Fluoride 13.56560886Not installed Not installed Assumed 99% capture Building Evacuation Baghouse Formaldehyde 1.46371898Not installed Not installed Assumed 99% capture Building Evacuation Baghouse Arsenic 0.000193965Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Cadmium 2.9648E-05Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Chromium 0.001528728Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Lead 0.010506331Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Manganese 0.350354697Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Mercury 0.00037309Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Nickel 0.004398007Not installed Not installed Assumed 99% capture and 98% control Building Evacuation Baghouse Chromium (VI) 0.000203866Not installed Not installed Assumed 99% capture and 98% control

Page 5 of 7Felman EF

Building Evacuation Baghouse Naphthalene 0.134030357Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 2-Methylnaphthalene 0.099191296Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Acenaphthylene 0.052906301Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Acenaphthene 0.028711166Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Fluorene 0.035656833Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Phenanthrene 0.125801579Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Anthracene 0.017666452Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Fluoranthene 0.072417837Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Pyrene 0.049525766Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Benzo(a)anthracene 0.004321387Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Chrysene 0.019794011Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Benzo(b)fluoranthene 0.004356286Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Benzo(k)fluoranthene 0.001292762Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Benzo(e)pyrene 0.003778814Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Benzo(a)pyrene 0.000401461Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Perylene 8.33751E-05Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Indeno(1,2,3-cd)pyrene 0.000319216Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Dibenz(a,h)anthracene 9.55499E-05Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Benzo(g,h,i)perylene 0.000546728Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.86256E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.40438E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 8.15219E-09Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 8.53321E-09Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.03972E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 2.3426E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 8.56369E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 2,3,7,8-Tetrachlorodibenzofuran 3.66787E-07Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,7,8-Pentachlorodibenzofuran 6.98634E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 2,3,4,7,8-Pentachlorodibenzofuran 6.49471E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,7,8-Hexachlorodibenzofuran 5.1763E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,6,7,8-Hexachlorodibenzofuran 2.47466E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 2,3,4,6,7,8-Hexachlorodibenzofuran 1.65588E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,7,8,9-Hexachlorodibenzofuran 7.55883E-09Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzofuran 3.29336E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,7,8,9-Heptachlorodibenzofuran 7.15547E-09Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 4.30089E-08Not installed Not installed Assumed 99% capture and 50% control Building Evacuation Baghouse Polychlorinated biphenyls 6.21031E-05Not installed Not installed Assumed 99% capture and 50% control

Secondary Crushing 1 Baghouse PM Filterable 0.065578383 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 1 Baghouse Arsenic 0 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 1 Baghouse Chromium 3.43374E-05 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 1 Baghouse Chromium (VI) 4.41629E-06 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 1 Baghouse Lead 7.73696E-05 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 1 Baghouse Manganese 0.024395158 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 1 Baghouse Nickel 0 Not installed Assumes 85% capture of fugitive emissions Not installed

Secondary Crushing 2 Baghouse PM Filterable 0.065578383 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 2 Baghouse Arsenic 0 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 2 Baghouse Chromium 3.43374E-05 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 2 Baghouse Chromium (VI) 4.41629E-06 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 2 Baghouse Lead 7.73696E-05 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 2 Baghouse Manganese 0.024395158 Not installed Assumes 85% capture of fugitive emissions Not installed Secondary Crushing 2 Baghouse Nickel 0 Not installed Assumes 85% capture of fugitive emissions Not installed

Secondary Furnace Baghouse PM Filterable 0.741729107 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Hydrochloric Acid 4.346784256 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Hydrogen Fluoride 5.596860566 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Formaldehyde 0.574997191 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Arsenic 8.09127E-05 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Cadmium 1.22848E-05 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Chromium 0.000593654 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Lead 0.004322785 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Manganese 0.122286585 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Mercury 0.000144789 Not installed Assumes 90% capture of fugitive emissions Not installed 0.289578 Secondary Furnace Baghouse Nickel 0.001848873 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Chromium (VI) 7.93002E-05 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Naphthalene 0.054418052 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 2-Methylnaphthalene 0.039783094 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Acenaphthylene 0.021824767 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Acenaphthene 0.011742029 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Fluorene 0.014503071 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Phenanthrene 0.051034907 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Anthracene 0.007357892 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Fluoranthene 0.028089892 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Pyrene 0.019268253 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Benzo(a)anthracene 0.001691797 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Chrysene 0.007590836 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Benzo(b)fluoranthene 0.001695467 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Benzo(k)fluoranthene 0.000512362 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Benzo(e)pyrene 0.001491051 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Benzo(a)pyrene 0.00016878 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Perylene 3.39688E-05 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Indeno(1,2,3-cd)pyrene 0.000131658 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Dibenz(a,h)anthracene 3.97741E-05 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Benzo(g,h,i)perylene 0.000232161 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 2,3,7,8-Tetrachlorodibenzo-p-dioxin 7.29296E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,7,8-Pentachlorodibenzo-dioxin 5.64515E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 3.3089E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 3.44648E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 4.15591E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 9.27828E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.57947E-08 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 2,3,7,8-Tetrachlorodibenzofuran 1.39282E-07 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,7,8-Pentachlorodibenzofuran 2.67249E-08 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 2,3,4,7,8-Pentachlorodibenzofuran 2.50144E-08 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,7,8-Hexachlorodibenzofuran 1.98669E-08 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,6,7,8-Hexachlorodibenzofuran 9.57443E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 2,3,4,6,7,8-Hexachlorodibenzofuran 6.57419E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,7,8,9-Hexachlorodibenzofuran 3.10101E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.30652E-08 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.93136E-09 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.68833E-08 Not installed Assumes 90% capture of fugitive emissions Not installed Secondary Furnace Baghouse Polychlorinated biphenyls 2.36062E-05 Not installed Assumes 90% capture of fugitive emissions Not installed

Emission Totals Arsenic 0.014441758 0.006163021 0.004937449 Cadmium 0.002271901 0.001005126 0.000819148 Chromium (III) 0.101101533 0.044906096 0.036183298 Lead 0.758159319 0.311281892 0.243349096 Manganese 22.41785249 7.871320504 5.250472324 Mercuric Chloride 0.003567853 0.003556255 0.003554685 Mercury (elemental) 0.01427141 0.01422502 0.014218739 Nickel 0.316372775 0.12889188 0.10087042 Chromium (VI) 0.015610008 0.006959176 0.005620577 Hydrochloric Acid 15.17467641 15.17467641 15.17467641 Hydrogen Fluoride 21.16598805 21.16598805 21.16598805 Naphthalene 0.445628947 0.328384099 0.311598591 Formaldehyde 2.728865082 2.728865082 2.729448032 2-Methylnaphthalene 0.345040336 0.258108139 0.24584904 Acenaphthylene 0.165194546 0.11902876 0.112288245 Acenaphthene 0.092816785 0.067729617 0.064105619 Fluorene 0.117745876 0.08656323 0.082089043

Page 6 of 7Felman EF

Phenanthrene 0.419581583 0.309520917 0.293780005 Anthracene 0.052977661 0.037585391 0.03531121 Fluoranthene 0.281631902 0.217845868 0.209214064 Pyrene 0.190803462 0.147200187 0.141277696 Benzo(a)anthracene 0.016320614 0.012519509 0.011999227 Chrysene 0.079686031 0.062222359 0.05989202 Benzo(b)fluoranthene 0.016763418 0.012928285 0.012407132 Benzo(k)fluoranthene 0.00468776 0.003552727 0.003394998 Benzo(e)pyrene 0.013908318 0.010588351 0.010129504 Benzo(a)pyrene 0.001154862 0.000805606 0.000753401 Perylene 0.000273555 0.00020066 0.000190179 Indeno(1,2,3-cd)pyrene 0.00099747 0.000718916 0.000678254 Dibenz(a,h)anthracene 0.0002872 0.000203943 0.00019165 Benzo(g,h,i)perylene 0.001500891 0.001026027 0.000954163 2,3,7,8-Tetrachlorodibenzo-p-dioxin 7.36555E-08 5.72727E-08 5.50299E-08 1,2,3,7,8-Pentachlorodibenzo-dioxin 5.30448E-08 4.07409E-08 3.9001E-08 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 3.02464E-08 2.31148E-08 2.20942E-08 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 3.1951E-08 2.44805E-08 2.34178E-08 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 3.96704E-08 3.05535E-08 2.92732E-08 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 9.08376E-08 7.02678E-08 6.74116E-08 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.00084E-07 2.25514E-07 2.14447E-07 2,3,7,8-Tetrachlorodibenzofuran 1.52437E-06 1.20031E-06 1.15758E-06 1,2,3,7,8-Pentachlorodibenzofuran 2.87025E-07 2.25365E-07 2.17162E-07 2,3,4,7,8-Pentachlorodibenzofuran 2.63927E-07 2.06662E-07 1.98979E-07 1,2,3,4,7,8-Hexachlorodibenzofuran 2.11536E-07 1.65873E-07 1.59773E-07 1,2,3,6,7,8-Hexachlorodibenzofuran 9.98258E-08 7.80207E-08 7.50792E-08 2,3,4,6,7,8-Hexachlorodibenzofuran 6.39403E-08 4.94056E-08 4.73814E-08 1,2,3,7,8,9-Hexachlorodibenzofuran 2.74833E-08 2.08818E-08 1.99245E-08 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.27343E-07 9.84317E-08 9.44093E-08 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.60879E-08 1.98373E-08 1.89325E-08 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.6935E-07 1.31534E-07 1.26341E-07 Polychlorinated biphenyls 0.0002577 0.000202839 0.000195597 Total HAP 64.96044093 49.13477661 46.32644043 PM Total 149.3886744 66.09513767 52.81350847

Page 7 of 7

# Eramet F18

**Control Efficiency and Fugitive Capture**

**Assumptions Baseline**  **Enhanced Local Capture**  **Building**

**Ventilation** Baghouse Control Efficiency (PM, metals) 0.98 0.98 0.98 Baghouse Control Efficiency (organics) 0.5 0.5 0.5 Scrubber Control Efficiency (PM, metals) 0.9 0.9 0.9 Scrubber Control Efficiency (organics) 0.5 0.5 0.5 Scrubber/Baghouse Control Efficiency (Hg) 0.15 0.15 0.15 Scrubber Control Efficiency (HCl, HF, Form) 0.9 0.9 0.9 EAF #1 Furnace Capture Efficiency 0.98 0.98 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". EAF #12 Furnace Capture Efficiency 0.98 0.98 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". MOR Furnace Capture Efficiency 0.98 0.98 0.99 EAF #1 Tapping Capture Efficiency 0.2 0.95 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". EAF #12 Tapping Capture Efficiency 0.3 0.95 0.99Baseline capture based on average of observer estimates. See "Ferroalloys Capture Estimate Summary". MOR Pouring Capture Efficiency 0.4 0.95 0.99 Crushing Capture Efficiency 0.95 0.95 0.99 EAF #1 Casting Capture Efficiency N/A 0.95 0.99 EAF #12 Casting Capture Efficiency N/A 0.95 0.99 MOR Casting Capture Efficiency 0.4 0.95 0.99 MOR Secondary Capture Efficiency N/A 0.9 N/A Mn Fraction (Crushing) 0.41 0.41 0.41 Mn Fraction (Tapping) 0.41 0.41 0.41 Mn Fraction (MOR, Casting) 0.41 0.41 0.41

Unit Description Pollutant Description Baseline (tpy) Electric Arc Furnace #12 Scrubber Outlet Arsenic 0.0035259Based on 8/2010, 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Cadmium 0.02829042Based on 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Chromium 0.0027813Based on 8/2010, 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Lead 0.10571568Average of 8/2010, 7/2012, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Manganese 6.875151315FeMn (8/2010, 7/2012) @ 50%, SiMn (3/2013) @ 50% Electric Arc Furnace #12 Scrubber Outlet Mercury 0.08291121FeMn (8/2010,7/2012,10/2012) @ 50%, SiMn (3/2013,10/2014) @ 50% Electric Arc Furnace #12 Scrubber Outlet Nickel 0.00233673Based on 8/2010, 3/2013 stack tests Electric Arc Furnace #12 Scrubber Outlet Chromium (VI) 0.00120012Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet PM Filterable 41.1176442FeMn (8/2010, 7/2012) @ 50%, SiMn (3/2013,3/2014) @ 50% Electric Arc Furnace #12 Scrubber Outlet Hydrochloric Acid 0.54507348Based on 8/2010, 7/2012, 3/2013 stack test Electric Arc Furnace #12 Scrubber Outlet Hydrogen Fluoride 0.32892048Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet Naphthalene 1.16927385FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet 2-Methylnaphthalene 0.4508991FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Acenaphthylene 0.3743367FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Acenaphthene 0.07712085FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Fluorene 0.1670532FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Phenanthrene 1.9663353FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Anthracene 0.1340061FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Fluoranthene 0.8371932FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Pyrene 0.5415213FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Benzo(a)anthracene 0.0040515FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Baseline (Emission Factor Approach) Description

Page 1 of 6

# Eramet F18

Electric Arc Furnace #12 Scrubber Outlet Chrysene 0.01735575FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Benzo(b)fluoranthene 0.0152424FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Benzo(k)fluoranthene 0.0056721FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Benzo(e)pyrene 0.01032585FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Benzo(a)pyrene 0.00285795FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Perylene 0.0003942FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Indeno(1,2,3-cd)pyrene 0.00371205FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Dibenz(a,h)anthracene 0.0010074FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Benzo(g,h,i)perylene 0.0043143FeMn (8/2010, 10/2012), SiMn (3/2013,10/2014) Electric Arc Furnace #12 Scrubber Outlet Formaldehyde 0.14471739Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.31838E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.47168E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.26801E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.28334E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.75638E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 4.15443E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 5.86263E-08Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,7,8-Tetrachlorodibenzofuran 1.70382E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8-Pentachlorodibenzofuran 1.25268E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,4,7,8-Pentachlorodibenzofuran 1.56804E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,7,8-Hexachlorodibenzofuran 1.13442E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,6,7,8-Hexachlorodibenzofuran 9.7455E-10Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 2,3,4,6,7,8-Hexachlorodibenzofuran 1.06215E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,7,8,9-Hexachlorodibenzofuran 1.23516E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.51548E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.47825E-09Based on 8/2010, 7/2012 stack test Electric Arc Furnace #12 Scrubber Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 3.03096E-09Based on 8/2010 stack test Electric Arc Furnace #12 Scrubber Outlet Polychlorinated biphenyls 3.6283E-07Based on 8/2010, 7/2012 stack test

Electric Arc Furnace #18 Scrubber Outlet Arsenic 0.00061597Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Cadmium 0.0049423Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Chromium 0.00048589Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Lead 0.018468394Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Manganese 1.201080166Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Mercury 0.014484483Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Nickel 0.000408224Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Chromium (VI) 0.000209659Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet PM Filterable 7.1832Based on results from 10/2009 stack test Electric Arc Furnace #18 Scrubber Outlet Hydrochloric Acid 0.095223642Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Hydrogen Fluoride 0.057461988Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Naphthalene 0.20427065Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 2-Methylnaphthalene 0.078771498Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Acenaphthylene 0.065396144Based on PM and pollutant/PM ratio from Furnace 12

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# Eramet F18

Electric Arc Furnace #18 Scrubber Outlet Acenaphthene 0.013472914Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Fluorene 0.029183981Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Phenanthrene 0.343516269Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Anthracene 0.023410695Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Fluoranthene 0.146256584Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Pyrene 0.09460308Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Benzo(a)anthracene 0.000707792Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Chrysene 0.003032027Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Benzo(b)fluoranthene 0.002662828Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Benzo(k)fluoranthene 0.000990909Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Benzo(e)pyrene 0.001803913Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Benzo(a)pyrene 0.00049928Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Perylene 6.88662E-05Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Indeno(1,2,3-cd)pyrene 0.00064849Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Dibenz(a,h)anthracene 0.000175991Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Benzo(g,h,i)perylene 0.000753703Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Formaldehyde 0.025281943Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 2,3,7,8-Tetrachlorodibenzo-p-dioxin 2.30319E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,7,8-Pentachlorodibenzo-dioxin 2.57101E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 2.2152E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 2.24198E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 3.06837E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 7.25774E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 1.02419E-08Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 2,3,7,8-Tetrachlorodibenzofuran 2.97655E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,7,8-Pentachlorodibenzofuran 2.18842E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 2,3,4,7,8-Pentachlorodibenzofuran 2.73935E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,7,8-Hexachlorodibenzofuran 1.98182E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,6,7,8-Hexachlorodibenzofuran 1.70253E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 2,3,4,6,7,8-Hexachlorodibenzofuran 1.85556E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,7,8,9-Hexachlorodibenzofuran 2.15781E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,6,7,8-Heptachlorodibenzofuran 2.64752E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.58248E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 5.29505E-10Based on PM and pollutant/PM ratio from Furnace 12 Electric Arc Furnace #18 Scrubber Outlet Polychlorinated biphenyls 6.3386E-08Based on PM and pollutant/PM ratio from Furnace 12

Furnace 18 Uncontrolled Vent Stacks Arsenic 0.002242282Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Cadmium 0.017991179Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Chromium 0.001768757Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Lead 0.06722946Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Manganese 4.372224751Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Mercury 0.006200701Calculated using mass balance approach Furnace 18 Uncontrolled Vent Stacks Nickel 0.001486034Based on PM and pollutant/PM ratio from Furnace 12

Page 3 of 6

# Eramet F18

Furnace 18 Uncontrolled Vent Stacks Chromium (VI) 0.000763211Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks PM Filterable 26.1486Based on results from 10/2009 stack test Furnace 18 Uncontrolled Vent Stacks Hydrochloric Acid 0.346637281Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Hydrogen Fluoride 0.209175653Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Naphthalene 0.743594989Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 2-Methylnaphthalene 0.286747464Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Acenaphthylene 0.238057915Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Acenaphthene 0.049044694Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Fluorene 0.106236809Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Phenanthrene 1.250483004Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Anthracene 0.085220639Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Fluoranthene 0.532409639Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Pyrene 0.344378287Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Benzo(a)anthracene 0.002576535Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Chrysene 0.011037319Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Benzo(b)fluoranthene 0.009693343Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Benzo(k)fluoranthene 0.003607149Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Benzo(e)pyrene 0.006566683Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Benzo(a)pyrene 0.001817502Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Perylene 0.00025069Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Indeno(1,2,3-cd)pyrene 0.002360663Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Dibenz(a,h)anthracene 0.000640652Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Benzo(g,h,i)perylene 0.002743662Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Formaldehyde 0.092032441Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 2,3,7,8-Tetrachlorodibenzo-p-dioxin 8.38418E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,7,8-Pentachlorodibenzo-dioxin 9.35909E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 8.06386E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 8.16135E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 1.11696E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 2.64199E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 3.72832E-08Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 2,3,7,8-Tetrachlorodibenzofuran 1.08354E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,7,8-Pentachlorodibenzofuran 7.96637E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 2,3,4,7,8-Pentachlorodibenzofuran 9.97189E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,7,8-Hexachlorodibenzofuran 7.2143E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,6,7,8-Hexachlorodibenzofuran 6.19761E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 2,3,4,6,7,8-Hexachlorodibenzofuran 6.7547E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,7,8,9-Hexachlorodibenzofuran 7.85495E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,6,7,8-Heptachlorodibenzofuran 9.63763E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,7,8,9-Heptachlorodibenzofuran 9.40087E-10Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.92753E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace 18 Uncontrolled Vent Stacks Polychlorinated biphenyls 2.3074E-07Based on PM and pollutant/PM ratio from Furnace 12

Page 4 of 6

# Eramet F18

Furnace #18 Tapping Fugitives Arsenic 0.004272355Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Cadmium 0.034279674Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Chromium 0.003370118Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Lead 0.128096334Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Manganese 20.427225Assumed 41% Mn content for tapping Furnace #18 Tapping Fugitives Mercury 0.011814569Calculated using mass balance approach Furnace #18 Tapping Fugitives Nickel 0.00283143Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Chromium (VI) 0.001454193Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives PM Filterable 49.8225Used 1.3 lb/ton, 12.5 ton/hr and 30% capture Furnace #18 Tapping Fugitives Hydrochloric Acid 0.660468857Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Hydrogen Fluoride 0.39855495Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Naphthalene 1.416816248Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 2-Methylnaphthalene 0.546357187Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Acenaphthylene 0.45358606Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Acenaphthene 0.093447804Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Fluorene 0.20241938Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Phenanthrene 2.382620464Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Anthracene 0.162376008Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Fluoranthene 1.014432101Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Pyrene 0.656164659Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Benzo(a)anthracene 0.004909227Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Chrysene 0.021030068Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Benzo(b)fluoranthene 0.018469309Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Benzo(k)fluoranthene 0.006872918Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Benzo(e)pyrene 0.012511895Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Benzo(a)pyrene 0.003462995Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Perylene 0.000477655Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Indeno(1,2,3-cd)pyrene 0.004497914Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Dibenz(a,h)anthracene 0.001220673Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Benzo(g,h,i)perylene 0.005227664Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Formaldehyde 0.175354943Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1.59749E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,7,8-Pentachlorodibenzo-dioxin 1.78324E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 1.53646E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 1.55503E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 2.12822E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 5.03395E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 7.10378E-08Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 2,3,7,8-Tetrachlorodibenzofuran 2.06453E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,7,8-Pentachlorodibenzofuran 1.51788E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 2,3,4,7,8-Pentachlorodibenzofuran 1.9E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,7,8-Hexachlorodibenzofuran 1.37458E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,6,7,8-Hexachlorodibenzofuran 1.18087E-09Based on PM and pollutant/PM ratio from Furnace 12

Page 5 of 6

# Eramet F18

Furnace #18 Tapping Fugitives 2,3,4,6,7,8-Hexachlorodibenzofuran 1.28701E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,7,8,9-Hexachlorodibenzofuran 1.49665E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.83632E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.7912E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 3.67263E-09Based on PM and pollutant/PM ratio from Furnace 12 Furnace #18 Tapping Fugitives Polychlorinated biphenyls 4.39644E-07Based on PM and pollutant/PM ratio from Furnace 12

Page 6 of 6

# Unit Description **Arsenic Cadmium**  **Chromium (III)**  **Chromium**

**(VI) Lead**  **Manganese Mercury**  **Nickel Hydrogen**  **Chloride Total PAH**  **Form aldehyde**  **Total**

**CDD/CDF Total PCBs**  **Total HAP Eramet Marietta**  Furnace #1 Baghouse Outlet 0.000399 0.00231 0.000661 0.000259 0.0222 1.33 0.119 0.00316 0.661 6.02 0.338 3.35E-08 5.20E-07 8.50 Furnace #1 Fugitives 0.000374 0.00217 0.000620 0.000243 0.0208 1.25 0.00263 0.00296 0.620 5.65 0.317 3.14E-08 4.88E-07 7.87 Furnace #1 Tapping Baghouse 0.000105 0.0000482 0.000770 0.000163 0.0108 0.325 0.0000526 0.00125 0.180 0.0553 0.0381 2.18E-08 2.14E-07 0.611 Furnace #1 Tapping Fugitives 0.00266 0.0154 0.00440 0.00173 0.148 24.3 0.000319 0.0211 4.40 0.587 0.405 2.32E-07 2.27E-06 29.9 Furnace #12 Scrubber Outlet 0.00353 0.0283 0.00158 0.00120 0.106 6.88 0.0829 0.00234 0.545 5.78 0.145 8.48E-08 3.63E-07 13.6 Furnace #12 Fugitives 0.000662 0.00531 0.000297 0.000225 0.0198 1.29 0.00183 0.000439 0.102 1.09 0.0272 1.59E-08 6.81E-08 2.53 Furnace #12 Tapping Fugitives 0.00427 0.0343 0.00192 0.00145 0.128 20.4 0.000268 0.00283 0.660 0.514 0.354 2.03E-07 1.99E-06 22.1 MOR Process Baghouse Outlet 0.00110 0.00198 0.00426 0.0000840 0.000933 0.982 0.00212 0.00147 0.0382 0.405 0.0101 NM NM 1.45 MOR Process Fugitives 0.00486 0.00876 0.0188 0.000372 0.00413 5.22 0.0000686 0.00649 0.169 0.126 0.0871 NM NM 5.65 Furnace #1 Casting 0.000485 0.00282 0.00080 0.000316 0.0270 4.44 0.0000583 0.00385 0.805 0.107 0.0740 NM NM 5.46 Furnace #12 Casting 0.000892 0.00716 0.000400 0.000304 0.0267 4.27 0.0000560 0.000591 0.138 0.103 0.0712 NM NM 4.61 MOR casting 0.00486 0.00876 0.0188 0.000372 0.00413 5.22 0.0000686 0.00649 0.169 0.126 0.0871 NM NM 5.65 C2P Crushing/Sizing Baghouse #1 0.000133 NM 0.00130 0.000106 0.000141 1.49 NM 0.00151 NM NM NM NM NM 1.49 C2P Crushing/Sizing Baghouse #2 0.000133 NM 0.00130 0.000106 0.000141 1.49 NM 0.00151 NM NM NM NM NM 1.49 C2P Crushing/Sizing Baghouse #3 0.000133 NM 0.00130 0.000106 0.000141 1.49 NM 0.00151 NM NM NM NM NM 1.49 C2P crushing and sizing fugitives 0.000567 NM 0.00554 0.000452 0.000603 6.35 NM 0.00646 NM NM NM NM NM 6.37 **Fugitive Emissions Total 0.0196**  **0.0847 0.0516**  **0.00547 0.379**  **72.7 0.00530**  **0.0512 7.07**  **8.30 1.42**  **4.82E-07 4.82E-06**  **90.1 Eramet Marietta Total**  **0.0252 0.117**  **0.0628 0.00749**  **0.519 86.7**  **0.210 0.0639**  **8.49 20.6**  **1.95 6.22E-07**  **5.91E-06 119**  **Felman Production** Furnace No. 2 Baghouse Outlet 0.00277 0.000311 0.01052 0.00155 0.181 1.26 0.01074 0.0820 3.48 0.342 0.331 4.12E-07 3.53E-05 5.70 Furnace No. 2 Fugitives 0.00260 0.000292 0.00988 0.00146 0.170 1.18 0.000237 0.0770 3.27 0.321 0.311 3.87E-07 3.31E-05 5.34 Furnace No. 2 Tapping Fugitives 0.00329 0.000369 0.01250 0.00184 0.215 3.97 0.000023 0.0974 4.14 0.171 0.118 6.76E-08 6.62E-07 8.73 Furnace No. 5 Baghouse Outlet 0.000710 0.000175 0.0089 0.00141 0.0173 0.773 0.00219 0.00461 0.351 0.321 0.309 6.41E-07 4.85E-05 1.79 Furnace No. 5 Fugitives 0.000666 0.000164 0.00833 0.00132 0.0163 0.725 0.0000484 0.00433 0.330 0.302 0.290 6.02E-07 4.55E-05 1.68 Furnace No. 5 Tapping Fugitives 0.000459 0.000113 0.00574 0.000913 0.0112 1.96 0.0000115 0.00298 0.227 0.085 0.058 3.34E-08 3.28E-07 2.36 Furnace No. 7 Baghouse Outlet 0.00117 0.000288 0.0146 0.00232 0.0285 2.48 0.00446 0.00759 0.857 0.269 0.611 6.41E-07 4.85E-05 4.28 Furnace No. 7 Fugitives 0.00110 0.000271 0.0137 0.00218 0.0268 2.33 0.000098 0.00713 0.804 0.253 0.573 6.02E-07 4.55E-05 4.01 Furnace No. 7 Tapping Fugitives 0.000459 0.000113 0.00574 0.000913 0.0112 1.96 0.0000115 0.00298 0.337 0.085 0.058 3.34E-08 3.28E-07 2.47 Furnace No. 2 Casting 0.000961 0.0001080 0.00365 0.000539 0.0629 1.160 0.0000068 0.0285 1.21 0.0500 0.0345 NM NM 2.55 Furnace No. 5 Casting 0.000134 0.0000331 0.00168 0.000267 0.00328 0.574 0.0000034 0.000872 0.0664 0.0248 0.0171 NM NM 0.689 Furnace No. 7 Casting 0.000134 0.0000331 0.00168 0.000267 0.00328 0.574 0.0000034 0.000872 0.0985 0.0248 0.0171 NM NM 0.721 Crushing/Screening System #1 0 NM 0 0 0 0 NM 0 NM NM NM NM NM 0.00 Crushing/Screening System #2 0 NM 0.000179 0.0000265 0.000463 0.210 NM 0 NM NM NM NM NM 0.211 Crushing/Screening #1 Fugitives 0 NM 0 0 0 0 NM 0 NM NM NM NM NM 0.00 Crushing/Screening #2 Fugitives 0 NM 0.00399 0.000589 0.0103 3.25 NM 0 NM NM NM NM NM 3.27 **Fugitive Emissions Total 0.00980**  **0.00150 0.0669**  **0.0103 0.531**  **17.7 0.000443**  **0.222 10.5**  **1.31 1.48**  **1.73E-06 1.25E-04**  **31.8 Felman Production Total**  **0.0144 0.00227**  **0.1011 0.0156**  **0.758 22.4**  **0.0178 0.316**  **15.2 2.25**  **2.73 3.42E-06**  **2.58E-04 43.8** 

# Unit Description **Arsenic Cadmium**  **Chromium (III)**  **Chromium**

**(VI) Lead**  **Manganese Mercury**  **Nickel Hydrogen**  **Chloride Total PAH**  **Form aldehyde**  **Total**

**CDD/CDF Total PCBs**  **Total HAP Eramet Marietta**  Furnace #1 Baghouse Outlet 0.000554 0.00265 0.00151 0.000454 0.0357 2.11 0.1194 0.00481 4.97 6.35 0.76 1.64E-07 1.80E-06 14.4 Furnace #1 Fugitives 0.000374 0.00217 0.000620 0.000243 0.0208 1.25 0.00263 0.00296 0.620 5.65 0.317 3.14E-08 4.88E-07 7.87 Furnace #1 Casting Baghouse 0.0000092 0.0000535 0.00001530.00000600 0.000513 0.0843 0.000047 0.0000731 0.764 0.051 0.070 0.00E+00 0.00E+00 0.97 Furnace #1 Tapping Fugitives 0.000166 0.00096 0.000275 0.000108 0.0092 1.52 0.0000199 0.00132 0.275 0.0367 0.0253 1.45E-08 1.42E-07 1.87 Furnace #12 Scrubber Outlet 0.00324 0.0260 0.00145 0.00110 0.0973 6.33 0.0763 0.00215 0.501 5.320 0.133 7.80E-08 3.34E-07 12.49 Furnace #12 Fugitives 0.000662 0.00531 0.000297 0.000225 0.0198 1.29 0.00183 0.000439 0.102 1.086 0.0272 1.59E-08 6.81E-08 2.53 Furnace #12 Tapping Fugitives 0.000305 0.00245 0.000137 0.000104 0.00915 1.46 0.0000192 0.000202 0.0472 0.0367 0.0253 1.45E-08 1.42E-07 1.58 MOR Process Baghouse Outlet 0.00123 0.00221 0.00476 0.0000939 0.00104 1.12 0.00219 0.00164 0.263 0.489 0.126 NM NM 2.01 MOR Process Fugitives 0.000405 0.000730 0.00157 0.0000310 0.000344 0.435 0.0000057 0.000541 0.0141 0.0105 0.0073 NM NM 0.471 Furnace #1 Casting 0.0000243 0.000141 0.0000402 0.0000158 0.00135 0.2220.00000291 0.000192 0.0402 0.0054 0.00370 NM NM 0.273 Furnace #12 Casting 0.0000446 0.000358 0.0000200 0.0000152 0.00134 0.2130.00000280 0.0000296 0.00690 0.0052 0.00356 NM NM 0.231 MOR casting 0.000405 0.000730 0.00157 0.0000310 0.000344 0.435 0.0000057 0.000541 0.0141 0.0105 0.0073 NM NM 0.471 C2P Crushing/Sizing Baghouse #1 0.000133 NM 0.00130 0.000106 0.000141 1.49 NM 0.00151 NM NM NM NM NM 1.49 C2P Crushing/Sizing Baghouse #2 0.000133 NM 0.00130 0.000106 0.000141 1.49 NM 0.00151 NM NM NM NM NM 1.49 C2P Crushing/Sizing Baghouse #3 0.000133 NM 0.00130 0.000106 0.000141 1.49 NM 0.00151 NM NM NM NM NM 1.49 C2P crushing and sizing fugitives 0.000567 NM 0.00554 0.000452 0.000603 6.35 NM 0.00646 NM NM NM NM NM 6.37 Furnace #12 Tap/Cast Baghouse 0.0000963 0.000773 0.0000432 0.0000328 0.00289 0.460 0.005895 0.0000638 0.744 0.288 0.397 9.42E-08 9.23E-07 1.90 MOR Secondary Baghouse 0.0000486 0.0000876 0.0001880.00000372 0.0000413 0.0522 0.0000292 0.0000649 0.0844 0.0316 0.044 NM NM 0.212 **Fugitive Emissions Total 0.00295**  **0.0129 0.0101**  **0.00123 0.0630**  **13.2 0.00452**  **0.0127 1.12**  **6.84 0.416**  **7.63E-08 8.40E-07**  **21.7 Eramet Marietta Total**  **0.00853 0.0447**  **0.0219 0.00324**  **0.201 27.8**  **0.208 0.0260**  **8.45 19.38**  **1.94 4.13E-07**  **3.90E-06 58.1**  **Felman Production** Furnace No. 2 Baghouse Outlet 0.00283 0.000318 0.01075 0.00159 0.185 1.31 0.0108 0.0838 7.31 0.467 0.549 5.20E-07 4.37E-05 9.9 Furnace No. 2 Fugitives 0.000325 0.0000365 0.001235 0.000182 0.0213 0.147 0.0000296 0.00963 0.409 0.0401 0.0388 4.83E-08 4.14E-06 0.668 Furnace No. 2 Tapping Fugitives 0.000548 0.0000616 0.00208 0.000307 0.0359 0.661 0.0000039 0.0162 0.690 0.0285 0.0197 1.13E-08 1.10E-07 1.45 Furnace No. 5 Baghouse Outlet 0.000721 0.000178 0.00902 0.00143 0.0176 0.801 0.00222 0.00469 0.636 0.419 0.485 7.98E-07 5.99E-05 2.38 Furnace No. 5 Fugitives 0.0000833 0.0000206 0.00104 0.000166 0.00203 0.09070.00000605 0.000541 0.0412 0.0377 0.0363 7.53E-08 5.69E-06 0.210 Furnace No. 5 Tapping Fugitives 0.0000765 0.0000189 0.000957 0.000152 0.00187 0.3270.00000191 0.000497 0.0379 0.0141 0.0097 5.57E-09 5.46E-08 0.393 Furnace No. 7 Baghouse Outlet 0.00118 0.000292 0.0148 0.00235 0.0289 2.53 0.00451 0.00769 1.44 0.354 0.928 7.98E-07 5.99E-05 5.31 Furnace No. 7 Fugitives 0.000137 0.0000338 0.00171 0.000273 0.00335 0.291 0.0000123 0.000891 0.101 0.0316 0.0717 7.53E-08 5.69E-06 0.502 Furnace No. 7 Tapping Fugitives 0.0000765 0.0000189 0.000957 0.000152 0.00187 0.3270.00000191 0.000497 0.0561 0.0141 0.0097 5.57E-09 5.46E-08 0.411 Furnace No. 2 Casting 0.00008010.00000900 0.000304 0.0000449 0.00524 0.09670.00000056 0.00237 0.101 0.00417 0.00288 NM NM 0.213 Furnace No. 5 Casting 0.00001120.00000276 0.000140 0.0000222 0.000273 0.04790.00000028 0.0000727 0.00554 0.00206 0.00142 NM NM 0.0574 Furnace No. 7 Casting 0.00001120.00000276 0.000140 0.0000222 0.000273 0.04790.00000028 0.0000727 0.00821 0.00206 0.00142 NM NM 0.0601 Crushing/Screening System #1 0 NM 0 0 0 0 NM 0 NM NM NM NM NM 0.00 Crushing/Screening System #2 0 NM 0.000179 0.0000265 0.000463 0.210 NM 0 NM NM NM NM NM 0.211 Crushing/Screening #1 Fugitives 0 NM 0 0 0 0 NM 0 NM NM NM NM NM 0.00 Crushing/Screening #2 Fugitives 0 NM 0.000997 0.000147 0.00258 0.813 NM 0 NM NM NM NM NM 0.817 Secondary Crushing Baghouse 0 NM 0.0000598 0.0000088 0.000155 0.0488 NM 0 NM NM NM NM NM 0.0490 Secondary Furnace Baghouse 0.0000809 0.0000123 0.000514 0.0000793 0.00432 0.122 0.000145 0.00185 4.35 0.262 0.575 3.32E-07 2.36E-05 5.31 **Fugitive Emissions Total 0.00135**  **0.000205 0.00957**  **0.00147 0.0746**  **2.85 0.0000568**  **0.0308 1.45**  **0.174 0.192**  **2.21E-07 1.57E-05**  **4.78 Felman Production Total**  **0.00616 0.00101**  **0.0449 0.00696**  **0.311 7.87**  **0.0178 0.129**  **15.2 1.68**  **2.73 2.67E-06**  **2.03E-04 28.0** 

# Mercury Emission Factors

Furnace 1 Tapping Baghouse Hg (Ton/yr) 0.00005256FeMn Production PM (Ton/yr) 5.57259735FeMn Production PM Tapping EF (lb/Ton) 1.3

Furnace 1 Outlet Hg (lb/hr) 0.00678SiMn Production Hg (lb/hr) 0.047618FeMn Production

Furnace 1 Casting PM Casting/Pouring EF (lb/Ton) 0.19

Tapping Hg Emission Factor (lb/Ton) 1.22614E-05FeMn Production Tapping Hg Emission Factor (lb/Ton) 1.74582E-06SiMn Production Tapping Hg Emission Factor (lb/Ton) 7.00362E-0650/50 Production Casting Hg Emission Factor (lb/Ton) 1.02361E-0650/50 Production Casting Hg Emission Factor (lb/Ton) 2.55158E-07SiMn Production

**EF (lb/yr) Assumption**  Furnace 1 Tapping Fugitives (lb/yr) 0.638 50/50 Production, 13 Tons/hr production, 20% capture Furnace 12 Tapping Fugitives (lb/yr) 0.537 50/50 Production, 12.5 Tons/hr production, 30% capture Furnace 2 Tapping Fugitives (lb/yr) 0.046 SiMn Production, 10.1 Tons/hr production, 70% capture Furnace 5 Tapping Fugitives (lb/yr) 0.023 SiMn Production, 5 Tons/hr production, 70% capture Furnace 7 Tapping Fugitives (lb/yr) 0.023 SiMn Production, 5 Tons/hr production, 70% capture

MOR Process Fugitives (lb/yr) 0.137 50/50 Production, 25.5 Tons/hr production, 40% capture

Furnace 1 Casting Fugitives (lb/yr) 0.117 50/50 Production, 13 Tons/hr production, 0% capture Furnace 12 Casting Fugitives (lb/yr) 0.112 50/50 Production, 12.5 Tons/hr production, 0% capture MOR Casting Fugitives (lb/yr) 0.137 50/50 Production, 25.5 Tons/hr production, 40% capture Furnace 2 Casting Fugitives (lb/yr) 0.014 SiMn Production, 10.1 Tons/hr production, 40% capture Furnace 5 Casting Fugitives (lb/yr) 0.007 SiMn Production, 5 Tons/hr production, 40% capture Furnace 7 Casting Fugitives (lb/yr) 0.007 SiMn Production, 5 Tons/hr production, 40% capture

Total 1.797

**EF (Tons/yr) Assumption**  Furnace 1 Tapping Fugitives (lb/yr) 0.0003190 50/50 Production, 13 Tons/hr production, 20% capture Furnace 12 Tapping Fugitives (lb/yr) 0.0002684 50/50 Production, 12.5 Tons/hr production, 30% capture Furnace 2 Tapping Fugitives (lb/yr) 0.0000232 SiMn Production, 10.1 Tons/hr production, 70% capture Furnace 5 Tapping Fugitives (lb/yr) 0.0000115 SiMn Production, 5 Tons/hr production, 70% capture Furnace 7 Tapping Fugitives (lb/yr) 0.0000115 SiMn Production, 5 Tons/hr production, 70% capture

MOR Process Fugitives (lb/yr) 0.0000686 50/50 Production, 25.5 Tons/hr production, 40% capture

Furnace 1 Casting Fugitives (lb/yr) 0.0000583 50/50 Production, 13 Tons/hr production, 0% capture Furnace 12 Casting Fugitives (lb/yr) 0.0000560 50/50 Production, 12.5 Tons/hr production, 0% capture MOR Casting Fugitives (lb/yr) 0.0000686 50/50 Production, 25.5 Tons/hr production, 40% capture Furnace 2 Casting Fugitives (lb/yr) 0.0000068 SiMn Production, 10.1 Tons/hr production, 40% capture

# Furnace 5 Casting Fugitives (lb/yr) 0.0000034 SiMn Production, 5 Tons/hr production, 40% capture

Furnace 7 Casting Fugitives (lb/yr) 0.0000034 SiMn Production, 5 Tons/hr production, 40% capture

Total 0.000899

# Organic HAP Emission Factors

**Organic HAP Pollutant Furnace 1 Tapping**  **Baghouse Emissions**  **Tapping EF**

**(lb/Ton) Casting EF (lb/Ton)**  Naphthalene 1.34E-02 3.12E-03 4.57E-04 2-Methylnaphthalene 8.11E-03 1.89E-03 2.77E-04 Acenaphthylene 6.55E-03 1.53E-03 2.23E-04 Acenaphthene 3.18E-03 7.42E-04 1.08E-04 Fluorene 3.66E-03 8.53E-04 1.25E-04 Phenanthrene 1.24E-02 2.90E-03 4.23E-04 Anthracene 2.44E-03 5.70E-04 8.33E-05 Fluoranthene 2.42E-03 5.64E-04 8.24E-05 Pyrene 1.87E-03 4.35E-04 6.36E-05 Benzo(a)anthracene 2.01E-04 4.70E-05 6.87E-06 Chrysene 3.42E-04 7.97E-05 1.16E-05 Benzo(b)fluoranthene 1.66E-04 3.88E-05 5.67E-06 Benzo(k)fluoranthene 8.32E-05 1.94E-05 2.84E-06 Benzo(e)pyrene 2.19E-04 5.11E-05 7.47E-06 Benzo(a)pyrene 6.13E-05 1.43E-05 2.09E-06 Perylene 8.76E-06 2.04E-06 2.99E-07 Indeno(1,2,3-cd)pyrene 3.94E-05 9.20E-06 1.34E-06 Dibenz(a,h)anthracene 1.31E-05 3.07E-06 4.48E-07 Benzo(g,h,i)perylene 9.20E-05 2.15E-05 3.14E-06 Formaldehyde 3.81E-02 8.89E-03 1.30E-03 2,3,7,8-Tetrachlorodibenzo-p-dioxin 6.18E-10 1.44E-10 Not measured 1,2,3,7,8-Pentachlorodibenzo-dioxin 8.45E-10 1.97E-10 Not measured 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin 5.74E-10 1.34E-10 Not measured 1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin 5.56E-10 1.30E-10 Not measured 1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin 5.65E-10 1.32E-10 Not measured 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin 1.05E-09 2.45E-10 Not measured 1,2,3,4,6,7,8,9-Octochlorodibenzo-p-dioxin 8.72E-09 2.03E-09 Not measured 2,3,7,8-Tetrachlorodibenzofuran 9.02E-10 2.10E-10 Not measured 1,2,3,7,8-Pentachlorodibenzofuran 6.79E-10 1.58E-10 Not measured 2,3,4,7,8-Pentachlorodibenzofuran 1.07E-09 2.50E-10 Not measured 1,2,3,4,7,8-Hexachlorodibenzofuran 6.75E-10 1.57E-10 Not measured 1,2,3,6,7,8-Hexachlorodibenzofuran 5.21E-10 1.22E-10 Not measured 2,3,4,6,7,8-Hexachlorodibenzofuran 7.84E-10 1.83E-10 Not measured 1,2,3,7,8,9-Hexachlorodibenzofuran 6.18E-10 1.44E-10 Not measured 1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.53E-09 3.58E-10 Not measured 1,2,3,4,7,8,9-Heptachlorodibenzofuran 5.74E-10 1.34E-10 Not measured 1,2,3,4,6,7,8,9-Octochlorodibenzofuran 1.54E-09 3.59E-10 Not measured Polychlorinated biphenyls 2.14E-07 4.99E-08 Not measured Particulate Matter 5.573

---- ---- PM Tapping Fugitive EF (lb/Ton) 1.3 PM Casting Fugitive EF (lb/Ton) 0.19