Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Adhesives and Sealants 0.02 0 0.01 0 0.22 00.02 Aerospace Industries 0 0.1 0 0.22 0.07 0.03 0 03.670.48 0.124.25 Agricultural Chemicals and Pesticides 0 00.09 0.01 00.01 Air and Gas Compressors 0.08 Aluminum Die-Castings 0 0 0.050.02 0.010.05 Aluminum Extruded Products 0.12 00.09 0.020.16 0.01 Aluminum Foundries 0.04 0.01 Aluminum Sheet, Plate, and Foil manufacturing 0.06

Ammunition, Except for Small Arms 0.06 0.01 Analytical Instruments 0.01 Animal Cremation 0 0.07 0.050.01 0 Apparel and Accessories, nec 0.2 0.01 Asbestos Products Manufacturing 0.04 Asphalt Concrete Manufacturing 6.96 0.01 0 0.11 Asphalt Roofing Manufacturing 0 0 Automotive Services, Nec 0.04 Automotive stampings 0.78 0.16 0.11 0.12 0.030.35 00.05 Aviation Gasoline Distribution: Stage I & II 0.03 Bags, Except Textile Bags 0 Ball and Roller Bearings Manufacturing 0.13 0.09 0.11 0 Beet Sugar 0 Biological Products, Except Diagnostic 0 Blowers and Fans 0.05 0.08 0.04 0.1 Boat Manufacturing 0 0 0.13 0 Bolts, Nuts, Rivets and Washers Manufacturing 0 0.01 0 0 00.02 Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions

Page 1 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Bottled and Canned Soft Drinks 0 Brass, Bronze, Copper, Copper Base Alloy Foundries 0.61 0.12 0.35 Brooms and Brushes 0.08 0 0 Burial Caskets 0.04 Business Services, nec (7399) 0 Canned Fruits and Vegetables 0 Carbon and Graphite Products 0.03 Carbon Black Production 0.14 0.23 Carbon Reactivation Furnaces 0.02 Carburetors, Pistons, Rings and Valves Manufacturing 0 0.08 0.11 0.08 0.2 0.06 Cathode Ray Television Picture Tubes Manufacturing 0.06 0.09 0.030.05 0.07 Cement, Hydraulic (not subject to Portland Cement MACT) 0 0 0.020.11 0.05 0 0 0 0 0 0 Chemical Manufacturing: Alkalies and Chloride (not subject to Chlorine 0 Chemical Manufacturing: Phenol 0.01 Chemical Preparations 0 1 0.01 0.01 0.14 1.32 0.05 0.010.01 Chemicals and Allied Products Manufacturing 0.01 0.02 0 0 0 0 0

Chemicals and Allied Products, nec 0 0 0.09 0 0.02 00.01 Clay Products Manufacturing 0 0 Clay Refractories (not subject to Refractories Manufacturing MACT) 0 0.04 Cold Finishing of Steel Shapes 0.16 0.030.41 0.18 0.04 Commercial Lighting Fixtures 0.01 Commercial Physical Research 0 0 0 0.01 0 0.01 0 0 Commercial Printing, Letterpress, and Screen 0.39 0.01 Commercial Printing, Lithographic 0.05 0.01 Communications Equipment, nec 0.02 0
Page 2 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Computer Terminals 0.03 Concrete Block and Brick 0.08 Concrete Products 0.04 0.02 Condensed and Evaporated Milk 0 Conveyors and Conveying Equipment Manufacturing 0.15 0.04 0.2 Copper Rolling and Drawing 1.04 0.04 0.370.01 0.41 0.010.04 Crushed And Broken Limestone 0 Custom Compound Purchased Resins Manufacturing 0.03 0.02 1.11 1.190.16 0.050.05 Cutlery 0.08 0.04 0.05 Cyclic Crude and Intermediate Production 0.41 0.2 0.060.04 Dental Equipment and Supplies 0.05 Dog and Cat Food 0.030.01 Drapery Hardware and Blinds and Shades 0 Drum and Barrel Reclamation 0 0.05 0.18 Edible Fats and Oils 0 Electric Lamps 0.08 0.39 1.45 0.03 Electrical Equipment and Supplies,

nec 0.01 Electrical Industrial Apparatus, nec 0 0 0.03 Electromedical Equipment Manufacturing 0.02 Electron Tubes Manufacturing 0 0

Electronic Capacitors Manufacturing 0 0.010.11 Electronic Coils and Transformers 0.05 Electronic Components and Accessories 0.04 Electronic Components, nec 0.05 0 00.01 0.11 0.01 0.010.110.01 0.02 0.2

Page 3 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Electronic Connectors 0 0.14 Electronic Resistors 0.05 Elevators and Moving Stairways Manufacturing 0.06 0.03 Engine Electric Equipment 0.06 0.05 Engineering, Laboratory, Scientific and Research 0 0 0 0 Environmental Controls Manufacturing 0.03 0.010.06 Fabricated Metal Products Manufacturing 0.27 0.05 Fabricated Metal Products, nec 0.02 0.01 Fabricated Pipe and Fittings 0.04 0.27 0.020.05 0.010.02 Fabricated Rubber Products, nec 0.07 0 0 0.12 0 0.12 0 0.010.13 Fabricated Structural Metal Manufacturing 0.03 0

Fabricated Structural Metal Products 0.01 0.030.15 0.06 Fabricated Textile Products, nec 0.05 Farm Machinery and Equipment Manufacturing 0.31 0.08 0 Fasteners, Buttons, Needles, and Pins 0 Fertilizers, Mixing only 0.04 01.09 Flat Glass 0 Flavoring Extracts and Syrups Production 0 0.01 Fluid Meters and Counting Devices 0.08 0.01 0 Fluid Power Cylinders and Activators 0 0 0 Fluid Power Pumps and Motors 0.01 0.01 0.02 Fluorescent Lamp Recycling 0.01 Food Preparations Production 0.42 0 0
Page 4 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Food Preparations Production 0 Food Products Machinery 0.04 0.05 Food Products Machinery Manufacturing 0 0 Footwear Cut Stock 0 Friction Products Manufacturing 0.01 00.03 Gaskets, Packing and Sealing Devices Manufacturing 0 0 General Industrial Machinery Manufacturing 0.16 0.01 0.08 0.03 0.2 General Laboratory Activities 0.89 Geothermal Power 2.16 Guided Missiles and Space Vehicles Manufacturing 0.51 Gum and Wood Chemical Manufacturing 0.01

Hand and Edge Tools Manufacturing 0 0.09 0 0.04 0.1 0.04 Hardware Manufacturing 0.08 0 00.02 0 0.1 0

Heating Equipment, Except Electric 0.03 Heavy Construction, Nec 0.04 0.04 0.05 Highway And Street Construction 0.08 Household Appliances 0.01 Household Audio and Video Equipment 0.06 Household Vacuum Cleaners 0.04 0 Human Cremation 0 0.03 0.020.01 0 0.99 Hydrochloric Acid Production 0 0.4 00.01 00.05 0 00.01 0 0.04 0 0.14 0 00.05 Industrial Boilers 0 0 0 Industrial Controls 0.02 0.04 Industrial Equipment: Finishing Operations

Page 5 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Industrial Furnaces and Ovens 0.05 0.04 0.05 0.05 Industrial Gases Manufacturing 0.16 Industrial Inorganic Chemical Manufacturing 0 0.03 0.04 0 0 Industrial Machinery, nec 0.04 0.1 00.07 Industrial Manufacturing and Equipment: finishing operations 0.07 Industrial Organic Chemical Manufacturing 0 0.78 0.45 1.31 0.28 00.02 Industrial Patterns 0 Industrial Patterns Packaging machinery 0 0.01 0 Inorganic Pigments Manufacturing 0 0 Institutional/Commercial Heating 0 0 Instrument Manufacturing 0.83 Instruments to Measure Electricity 0.04 0.07 Internal Combustion Engine Manufacturing 0 0.05 0.05 Iron Foundries 0 0.01 0 Jewelry, Precious Metal 0.03 0.010.06 Lamp Breakage 1.67 Large Appliance (Surface Coating) 0 0.39 0.08 0.06 0.2 0.280.26 0.010.14 Lawn and Garden Equipment 0 0.08 0.05 0.07 Lead Acid Battery Manufacturing 0.1 0 0 0 Lead Pencils, Art Goods Manufacturing 0.03 0.78 0.08 0.060.08 0.1 Leather Goods, nec 0 0.01 Leather Tanning and Finishing Operations 0.04 0 0 Lighting Equipment 0 0.060.12 0.05 0 Lubricating Oils and Greases 0 0.06 0.01 00.08 Luggage 0.03 Machine Tool Accessories 0 0.03 0.1 0.01 0

Page 6 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Machine tools, Metal Cutting Types 0.08 0.09 0.06 0

Machine tools, Metal Forming Types 0.16 0.28 0.01 Magnetic and Optical Recording Media Manufacturing 0.04 Manifold Business Forms 0.04 0.080.05 0.01 Manufacturing Industries, nec 0.02 0.1 0 0.080.04 0.110.11 0.12 Marking Devices 0.01 Measuring and Controlling Devices,

nec 0 0.12 Measuring and Dispensing Pumps 0.01 Meat Packing Plants 0 Men's and Boys' Shirts 0.03 Men's and Boys' Work Clothing 0 Men's Footwear, Except Athletic 0.03 Metal Barrels, Drums, and Pails 0 0 0.11 0 0.03 0 Metal Can (Surface Coating) 0.63 0 Metal coating and allied services 0.24 0 0.040.01 0.030.16 0.030.12 Metal Coil (Surface Coating) 0.03 0 0 0.1 00.01 Metal Doors, Sash, and Trim 0.08 0.12 0.02 0.1 0.02 Metal Forgings and Stampings 0.04 0.030.04 0.05 0 Metal Furniture (Surface Coating) 0 0 0 0.050.35 Metal Heat Treating Manufacturing 0.02 0.04 0.25 0 0.05 0.040.12 Metal Sanitary Ware Manufacturing 0.11 0.080.16 0.2 Metal Services, nec 0.04 0 0.1 0 Metal Stampings Manufacturing 0.19 0.01 0.08 0.23 0.02 0.5 Metal Valves 0.05 0.040.06 0 Metalworking Machinery 0.08 0.04 0.1 0 Metalworking Machinery, nec 0.01 Millwork, Plywood, and Structural Members 0.01

Page 7 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Mineral Wool Manufacturing (not subject to Mineral Wool Production MACT) 0.02 Mining Machinery Manufacturing 0.15 0 0.4 0.010.08 0 Miscellaneous Fabricated Metal Products 0.2 0.58 0.26 0.010.08 Miscellaneous Fabricated Wire Products 0.2 0 0.030.12 0.04 0.3 0.010.05 Miscellaneous Metal Work 0.05 0.05 Miscellaneous Plastics Products 0.01 0.1 0.09 0 0.22 0 0 Miscellaneous Publishing 0 MON 04.73 0.1 1.08 0.2 0.11 0.11 0 00.62 Motor Vehicle Equipment 0 Motors and Generators Manufacturing 0.16 0 0.01 0.02 Natural Gas Transmissions and Storage 3.17 Nitrogenous Fertilizers 0

Nonclay Refractories (not subject to Refractories Manufacturing MACT) 0.24 0.15

Noncurrent-Carrying Wiring Devices 0 0.19 0 0 Nonferrous Die-castings, Except Aluminum 0.08 0.01 0.140.08 0.25 0.16 Nonferrous Forgings 0.12 0.03 0 0.25 Nonferrous Foundries, nec 0.01 Nonferrous Rolling and Drawing 0.78 0.08 0.15 0 0.010.12 0 Nonferrous Wire Drawing and Insulating 0.02 0.76 0.13 0 0.01 Nonmetallic Mineral Products Manufacturing 0 0 0 0.01 0 0 0 Nutritional Yeast Manufacturing 1.79
Page 8 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Ophthalmic Goods 0.02 00.02 Optical Instruments and Lenses 0 Optical instruments and lenses (disc. 1987, 3827) 0.01 Ordnance And Accessories, nec 0.03 Other Source Categories (HCB) 1.3 Other Source Categories (PCB) 0.41 Paint Stripping Operations [3] Paints and Allied Products Manufacturing 0.1 0.02 0 0 Paper And Allied Products 2.37 Paper and Other Webs (Surface Coating) 0.08 0.04 0.08 0.02 0.030.05 Paper Coating and Glazing Manufacturing 0.01 0 Paper Industries Machinery 0.19 0.17 0.24 Paper Mills (not subject to Pulp and Paper MACT) 3.34 0.18 Paperboard Mills 0 Particleboard 0 Petroleum Bulk Stations and Terminals (not subject to Petroleum Refining MACT) 0.02 0 0 Petroleum Products, nec 0 Petroleum Refineries: Other Sources Not Distinctly Listed 1.26 Petroleum Refining (not subject to Petroleum Refining MACT) 1.99 0.53 0.05 0.47 0.340.07 00.26 0 Pharmaceuticals Production 0 0.05 0.1 0.2 00.03 Phosphate Fertilizers Production 0.060.36 Photographic Equipment And Supplies 0 0.01 0.02 0

Page 9 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Plastic materials and resins manufacturing [6] 1.63 0.11 Plastic Parts and Products (Surface Coating) 0 0.03 0.04 Plastics Materials and Resins Manufacturing 0.14 0 0.042.49

Plastics Products Inc. Plastic Bottles 0.05 Platemaking Services 0.02 Plating And Polishing 0.19 00.06 0.08 Plumbing And Heating, Except Electric 0.04 0 Plumbing Fixture Fittings and Trim 0.1 0.730.08 00.22 00.04 Plywood/Particle Board Manufacturing 0.01 0 0 0.19 00.01 Polishes and Sanitation Goods Manufacturing 0 0 0.16 0.01 0 Polyether Polyols Production 1.6

Polymers and Resins (I,II,and IV) [2] 0.14 Polyvinyl Chloride and Copolymers Production 0 Portland Cement Manufacture (Combined) 0 Potato Chips and Similar Snacks 0

Poultry Slaughtering and Processing 0 Power Driven Handtools 0 Power Transmission Equipment 0 0.01 0.16 0 0.01 Prepared Feeds Manufacturing 0.77 0.23 Pressed and Blown Glass and Glassware Manufacturing 0 0.01 0

Page 10 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Primary Battery, Dry and Wet Manufacture 0 0.03 0.70.01 0 Primary Lead Smelting 0.01 Printing Ink 0.16 0.16 0.02 Printing Trades Machinery Manufacturing 0.56 Printing, Coating, and Dyeing of Fabrics 0.44 0.04 0 0 0.12 0 0.010.02 Printing/Publishing (Surface Coating) 0.02 0.07 0.1 0 0.050.04 Process Control Instruments 0 0 0.1 0.020.02 Products of Purchased Glass 0.17 0 Pumps and Pumping Equipment Manufacturing 0.02 0.01

Radio and Television Communications Equipment (3662) 0.11 0.01 0.010.07

Radio and Television Communications Equipment (3663) 0 0 0.04 0.01 Railroad Equipment Manufacturing 0.08 0.060.66 0.07 Reconstituted Wood Products 0.1 Refractories Manufacturing 0.2 0.02 Refuse Systems 0 0 2.46 0 Reinforced Plastic Composites Production 0.24 0.01 0 0.04 0.02 0.2 0.01 0 Relays and Industrial Controls 0.08 0.05 0.01 Residential lighting fixtures 0.01 Rubber & Misc. Plastic Products 0 Rubber and Plastic Hose and Belting Manufacturing 0.04 0.03 Sanitary Food Containers 0 Saw Blades and Handsaws 0 0 0
Page 11 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Sawmills and Planing Mills, general 0.01 Scrap and Waste Materials 5.49 Screw Machine Products Manufacturing 0.01 0 0.130.01 0.010.57 Search and Navigation Equipment 0.06 0.04 Secondary Lead Smelting 0.01 0.09 0 0 Secondary Mercury Production 0.62 Secondary Nonferrous Metals Production 0.01 Secondary Zinc Production 2.4 Semiconductor Manufacturing 0.08 0.020.03 Sewage Sludge Incineration 0.02 0.050.66 0.33 0.02 0.01 0 0 00.65 Sheet Metal Work 0.23 0.030.26 0.21 0.01 Shipbuilding and Ship Repair (Surface Coating) 0 0 0 00.01 0 0 0 Silverware and Plated Ware 0.06 Small Arms 0.04 0.09 Small Arms Ammunition 0 Soap and Other Detergents Manufacturing 0.08 6.670.030.01 0.04 0.1 Soaps, Cleaners, and Toilet Goods 0 0 0 Softwood Drying Kilns 1.85 0.25 Softwood Veneer and Plywood 0.08 Space Research and Technology 0 0.39 00.04 0 0 0.06 00.41 00.05 0 Space Vehicle Parts and Equipment, nec 0.02 0.01 Special Dies, Tools, Jigs and Fixtures 0.15 00.08 0.030.26 00.06 Special Industry Machinery, nec 0.02 0.9 00.01 0.09 0.02

Speed Changers, Drives, and Gears 0.01 0.03 0.1 0.16 00.01 Stainless and Non-stainless Steel Manufacture - EAF 0.01 0.01 0.03 0

Page 12 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Stationary Combustion Turbines 3.14 0.04 2.21 Stationary Internal Combustion Engines 0.01 Steel and Iron Reclamation- Auto Scrap Burning 0.15 0 0.2 Steel Foundries 0.1

Steel Pipe and Tubes Manufacturing 0.25 0.19 0.3 0.3 00.05 Steel Springs, Except Wire 0 0 Steel Wire and Related Products Manufacturing 0.15 0.280.24 0.15 Surface Active Agents Manufacturing 0.03 0 1.760.04 0 Surgical and Medical Instruments Manufacturing 0.04 0.09 0.04 0.05 0.05 Surgical Appliances and Supplies Manufacturing 0.06 Switchgear and Switchboard Apparatus 0.04 0.060.05 0.010.01 Taconite Iron Ore Processing 0 0 0 Tanks and Tank Components Manufacturing 0 0 0.03

Telephone and Telegraph Apparatus 0.02 0 Textile Machinery 0 0 0.05 Tire Production 0.030.270.06 00.670.03 0 00.02 0 0.08 0 0.010.01 0 00.01 Tires and Inner Tubes (not subject to Tire Production MACT) 0.02 Toilet Preparations Manufacturing 0 0.01 Toys and Sporting Goods 0.01 Transformers, Except Electronic 0 0.07 0 0.01 0 0.01 Transmitting, Industrial and Special Purpose Elect 0
Page 13 of 14Source Category Name 1,1,2,2-Tetrachloroethane 1,2-Dichloropropane 1,3 Butadiene 1,3-Dichloropropene

7-PAH Acetaldehyde Acrolein Acrylonitrile Arsenic Compounds Benzene Beryllium Compounds Cadmium Compounds Chloroform Chromium Compounds Dioxins (2,3,7,8-TCDD) Ethylene Dichloride Ethylene Oxide Formaldehyde Hexachlorobenzene Hydrazine Lead Compounds Manganese Compounds Mercury Compounds Methylene Chloride Nickel Compounds Polychlorinated biphenyls Quinoline Tetrachloroethylene Trichloroethylene Vinyl Chloride

Source Categories Grouped as "Other" in Table of Promulgated Categories Percentage Contributions Trucking, Except Local 0.01 Turbines and Turbine Generator Sets 0.11 0.1 Unsupported Plastics Film & Sheet 0.27 0.04 1.49

Unsupported Plastics Profile Shapes 0.11 00.08 Welding Apparatus 0.05 0.19 0.07 0.01 Welding Apparatus, Electric 0.04 0.1 0.05 Wet Corn Milling 0.3 0.09 0.18 Wire Springs 0.3 0.04 0 0 Wood Furniture (Surface Coating) 0.04 0.03 0.010.05 Wood Partitions and Fixtures 0.03 Wood Preserving 0.02 0.09 Wood Products 0 0 Wool Fiberglass Manufacturing 0 0 0.18 0 X-ray Apparatus and Tubes 0.01

Cumulative percentage above 0 5 4 0 7 7 1 4 1 6 1 7 7 10 0 7 7 5 1 2 9 10 9 8 10 8 0 1 9 5

Page 14 of 14