Storm water discharge associated with industrial activity is defined as storm water runoff that exits any system that is used for collecting and conveying storm water that originates from manufacturing, processing, material storage, and waste material disposal areas (and similar areas where storm water can contact industrial pollutants related to the industrial activity) at an industrial facility that falls under one or more of the following sectors of industry:

1. Timber Products
2. Paper and Allied Products
3. Chemical and Allied Products
4. Asphalt Paving and Roofing Materials and Lubricants
5. Glass, Clay, Cement, Concrete, and Gypsum Products
6. Primary Metals
7. Metal mining (Ore Mining and Dressing)
8. Coal Mines and Coal Mining Related Facilities
9. Oil and Gas Extraction
10. Mineral Mining and Dressing
11. Hazardous Waste Storage Facilities
12. Landfills and Land Application Sites
13. Automobile Salvage Yards
14. Scrap Recycling Facilities
15. Steam Electric Generating Facilities
16. Land Transportation and Warehousing
17. Water Transportation
18. Ship and Boat Building or Repairing Yards
19. Air Transportation
20. Treatment Works
21. Food and Kindred Products
22. Textile Mills, Apparel, and Other Fabric Product Manufacturing, Leather and Leather Products
23. Furniture and Fixtures
24. Printing and Publishing
25. Rubber, Miscellaneous Plastic Products, and Miscellaneous Manufacturing Industries
26. Leather Tanning and Finishing
27. Fabricated Metal Products
28. Transportation Equipment, Industrial or Commercial Machinery
29. Electronic, Electrical, Photographic, and Optical Goods
30. Miscellaneous Industrial Activities

The table SIC Codes Subject to TPDES Multisector General Permit (TXR050000) lists the SIC codes and Industrial Activity codes under each of these sectors.