Table 3 . Drilling Scenario – Emission Source Summary

Air Emission Sources Unit Drilling Scenario EPN(s) per day per year DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator bbls 425 67,600 All sources with EPN starting with SB Supply Boats bbls 415 86,320

DR - PO - 01 Painting (paint + thinner) gals 34 - DR - WL - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 hours 24 4,992 DR - GE - 08 ROV Emergency Generator hours 1 100 DR - AC - 01 Air Compressor Diesel Engine #1 hours 0.5 104 DR - AC - 02 Air Compressor Diesel Engine #2 hours 0.5 104 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 hours 0.5 100

DR - FL - 01 Diesel Powered Forklift Engine hours 24 4,992 DR - FR - 01 Fast Rescue Craft hours 0.5 100 DR - WB - 01 Water Blasting Engine hours 12 2,496 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 hours 24 4,992 DR - WO - 01 Welding lbs 50 10,400 DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks hours 24 4,992 DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks hours 24 4,992

DR - FE - 01 Drillship Fugitive Emissions hours 24 4,992 DR - VG - 01 Mud Degasser Vent hours 24 4,992 DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 hours 24 4,992 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 hours 24 4,992 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 hours 24 125T able 4 . Drilling Scenario – PM Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 240.28 19.14 All sources with EPN starting with SB Supply Boats 114.65 11.92

DR - PO - 01 Painting (paint + thinner) 2.54 0.13 DR - WL - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 4.34 0.45 DR - GE - 08 ROV Emergency Generator 0.14 0.01 DR - AC - 01 Air Compressor Diesel Engine #1 0.02 1.03E - 03 DR - AC - 02 Air Compressor Diesel Engine #2 0.02 8.58E - 04 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 0.24 0.03

DR - FL - 01 Diesel Powered Forklift Engine 1.58 0.17 DR - FR - 01 Fast Rescue Craft 0.08 7.56E - 03 DR - WB - 01 Water Blasting Engine 0.82 0.09 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 4.05 0.74 DR - WO - 01 Welding 1.92 0.2 0 DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 2.93 0.30 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 4.73 0.49 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 36.96 0.10 Total Emissions 415.29 33.77Table 5. Drilling Scenario – PM 10 Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 137.68 10.97 All sources with EPN starting with SB Supply Boats 94.26 9.8

DR - PO - 01 Painting (paint + thinner) 2.54 0.13 DR - WL - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 4.34 0.45 DR - GE - 08 ROV Emergency Generator 0.14 0.01 DR - AC - 01 Air Compressor Diesel Engine #1 0.02 1.03E - 03 DR - AC - 02 Air Compressor Diesel Engine #2 0.02 8.58E - 04 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 0.24 0.03

DR - FL - 01 Diesel Powered Forklift Engine 1.58 0.17 DR - FR - 01 Fast Rescue Craft 0.08 7.56E - 03 DR - WB - 01 Water Blasting Engine 0.82 0.09 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 4.05 0.74 DR - WO - 01 Welding 1.92 0.2 0 DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 2.93 0.30 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 4.73 0.49 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 36.96 0.10 Total Emissions 29 2.30 2 3.48Table 6. Drilling Scenario – PM 2.5 Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 133.59 10.64 All sources with EPN starting with SB Supply Boats 91.46 9.51

DR - PO - 01 Painting (paint + thinner) 2.54 0.13 DR - W L - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 4.34 0.45 DR - GE - 08 ROV Emergency Generator 0.14 0.01 DR - AC - 01 Air Compressor Diesel Engine #1 0.02 1.03E - 03 DR - AC - 02 Air Compressor Diesel Engine #2 0.02 8.58E - 04 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 0.24 0.03

DR - FL - 01 Diesel Powered Forklift Engine 1.58 0.1 7 DR - FR - 01 Fast Rescue Craft 0.08 7.56E - 03 DR - WB - 01 Water Blasting Engine 0.82 0.09 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 4.05 0.74 DR - WO - 01 Welding 1.92 0.2 0 DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 2.93 0.30 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 4.73 0.49 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 36.96 0.10 Total Emissions 285.41 22.86Table 7. Drilling Scenario – NO X Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 8,670 690.83 All sources with EPN starting with SB Supply Boats 4189 435.62

DR - PO - 01 Painting (paint + thinner) - - DR - W L - 01, DR - W L - 02 Wire Line Engines no. 1 and 2 143.23 14.9 0 DR - GE - 08 ROV Emergency Generator 4 .47 0.22 DR - AC - 01 Air Compressor Diesel Engine #1 0.28 0.01 DR - AC - 02 Air Compressor Diesel Engine #2 0.23 0.01 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 3.32 0.42

DR - FL - 01 Diesel Powered Forklift Engine 22.32 2.32 DR - FR - 01 Fast Rescue Craft 1.42 0.14 DR - WB - 01 Water Blasting Engine 16.41 1.71 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding - - DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 64.37 6.69 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 156.25 16.25 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 410.06 1.07 Total Emissions 13,682 1,17 0Table 8 . Drilling Scenario – SO 2 Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 3.85 0.31 All sources with EPN starting with SB Supply Boats 3.91 0.41

DR - PO - 01 Painting (paint + thinner) - - DR - WL - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 0.15 1.54E - 02 DR - GE - 08 ROV Emergency Generator 4.77E - 03 2.38E - 04 DR - AC - 01 Air Compressor Diesel Engine #1 1.01E - 04 5.25E - 06 DR - AC - 02 Air Compressor Diesel Engine #2 8.41E - 05 4.37E - 06 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 1.20E - 03 1.53E - 04

DR - FL - 01 Diesel Powered Forklift Engine 8.08E - 03 8.40E - 04 DR - FR - 01 Fast Rescue Craft 1.29E - 03 1.29E - 04 DR - WB - 01 Water Blasting Engine 2.80E - 02 2.91E - 03 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding - - DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 6.65E - 02 6.92E - 03 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 1.62E - 01 1.68E - 02 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 1.88E - 01 4.91E - 04 Total Emissions 8.37 0.76Table 9 . Drilling Scenario – H 2 SO 4 Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 1.20E - 01 9.58E - 03 All sources with EPN starting with SB Supply Boats 1.22E - 01 1.27E - 02

DR - PO - 01 Painting (paint + thinner) - - DR - W L - 01, DR - W L - 02 Wire Line Engines no. 1 and 2 4.63E - 03 4.81 E - 04 DR - GE - 08 ROV Emergency Generator 1.49E - 04 7.45E - 06 DR - AC - 01 Air Compressor Diesel Engine #1 3.15E - 06 1.64E - 07 DR - AC - 02 Air Compressor Diesel Engine #2 2.63E - 06 1.37E - 07 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 3.75E - 05 4.76E - 06

DR - FL - 01 Diesel Powered Forklift Engine 2.52E - 04 2.62E - 05 DR - FR - 01 Fast Rescue Craft 4.03E - 05 4.03E - 06 DR - WB - 01 Water Blasting Engine 8.75E - 04 9.10E - 05 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding - - DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 2.08E - 03 2.16E - 04 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 5.05E - 03 5.25E - 04 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 5.89E - 03 1.53E - 05 Total Emissions 2.61E - 01 2.37 E - 02Table 10 . Drilling Scenario – CO Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 546.18 43.52 All sources with EPN starting with SB Supply Boats 2 , 900 301.57

DR - PO - 01 Painting (paint + thinner) - - DR - WL - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 75.95 7.90 DR - GE - 08 ROV Emergency Generator 2.45 0.12 DR - AC - 01 Air Compressor Diesel Engine #1 0.06 3.13E - 03 DR - AC - 02 Air Compressor Diesel Engine #2 0.05 2.61E - 03 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 0.72 0.09

DR - FL - 01 Diesel Powered Forklift Engine 4.81 0.5 DR - FR - 01 Fast Rescue Craft 0.95 0.09 DR - WB - 01 Water Blasting Engine 14.36 1.49 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding - - DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 48.77 5.07 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 82.86 8.62 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 272.49 0.71 Total Emissions 3,949 369.69Table 11 . Drilling Scenario – VOC Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 196.79 15.68 All sources with EPN starting with SB Supply Boats 224.63 23.36

DR - PO - 01 Painting (paint + thinner) 173.14 9 .00 DR - WL - 01, DR - W L - 02 Wire Line Engines no. 1 and 2 33.19 3.45 DR - GE - 08 ROV Emergency Generator 1.07 0.05 DR - AC - 01 Air Compressor Diesel Engine #1 0.02 1.18E - 03 DR - AC - 02 Air Compressor Diesel Engine #2 0.02 9.80E - 04 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 0.27 3.42E - 02

DR - FL - 01 Diesel Powered Forklift Engine 1.81 0.19 DR - FR - 01 Fast Rescue Craft 0.29 0.03 DR - WB - 01 Water Blasting Engine 6.28 0.65 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding - - DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks 0.68 0.32 DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks 0.04 0.38

DR - FE - 01 Drillship Fugitive Emissions 0.13 0.02 DR - VG - 01 Mud Degasser Vent 53.56 5.57 DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 14.92 1.55 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 36.20 3.77 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 15.87 0.04 Total Emissions 758.90 64.10Table 12. Drilling Scenario – Pb Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 6.97E - 02 5.55E - 03 All sources with EPN starting with SB Supply Boats 7.08E - 01 7.36E - 03

DR - PO - 01 Painting (paint + thinner) - - DR - WL - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 2.68E - 03 2.79E - 04 DR - GE - 08 ROV Emergency Generator 8.63E - 05 4.31E - 06 DR - AC - 01 Air Compressor Diesel Engine #1 1.83E - 06 9.50E - 08 DR - AC - 02 Air Compressor Diesel Engine #2 1.52E - 06 7.92E - 08 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 2.17E - 05 2.17E - 06

DR - FL - 01 Diesel Powered Forklift Engine 1.46E - 04 1.52E - 05 DR - FR - 01 Fast Rescue Craft 2.33E - 05 2.33E - 06 DR - WB - 01 Water Blasting Engine 5.07E - 04 5.27E - 05 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding 8.10E - 03 8.42E - 04 DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent - - DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 1.20E - 03 1.25E - 04 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 2.92E - 03 3.04E - 04 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 3.41E - 03 8.88E - 06 Total Emissions 7.97 E - 01 1.45 E - 02Table 13. Drilling Scenario – GHG Emissions

Air Emission Sources Drilling Scenario EPN(s) lb/day tpy DR - GE - 01 through DR - GE - 07 Drillship Main Engines and Emergency Generator 393,098 31,320 All sources with EPN starting with SB Supply Boats 369,247 38,402

DR - PO - 01 Painting (paint + thinner) - - DR - W L - 01, DR - WL - 02 Wire Line Engines no. 1 and 2 15,117 1,572 DR - GE - 08 ROV Emergency Generator 486.72 24.34 DR - AC - 01 Air Compressor Diesel Engine #1 10.31 0.54 DR - AC - 02 Air Compressor Diesel Engine #2 8.59 0.45 DR - EC - 01 through DR - EC - 06 Escape Capsule Diesel Engine no. 1 to 6 122.54 12.25

DR - FL - 01 Diesel Powered Forklift Engine 824.56 85.75 DR - FR - 01 Fast Rescue Craft 131.7 13.17 DR - WB - 01 Water Blasting Engine 2,854 297.28 DR - DC - 01 through DR - DC - 03 Dust Collectors no. 1 to 3 - - DR - WO - 01 Welding - - DR - DT - 01 through DR - DT - 09 Nine Drill Ship Diesel Storage Tanks - - DR - FT - 01 through DR - FT - 03 Three Drill Ship Jet Fuel Storage Tanks - -

DR - FE - 01 Drillship Fugitive Emissions - - DR - VG - 01 Mud Degasser Vent 2,713 282.23 DR - CU - 01, DR - CU - 02 Drilling Casing Units 1 and 2 6,794 706.61 DR - EL - 01, DR - EL - 02 Electric line diesel 1 and 2 16,491 1,715 DR - VS - 01 through DR - VS - 05 Well Evaluation Engines No. 1 to 5 19,240 50.10 Total Emissions 827,144 74,482