Description
Maintenance, Repair and Rebuilding of Equipment: Railway Equipment

Possible NAICS Codes
488210 – Support Activities for Rail Transportation
541350 – Building Inspection Services
237990 – Other Heavy and Civil Engineering Construction
336510 – Railroad Rolling Stock Manufacturing
811198 – All Other Automotive Repair and Maintenance
811121 – Automotive Body, Paint, and Interior Repair and Maintenance
211130 – Natural Gas Extraction
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
333517 – Machine Tool Manufacturing

Includes
RESURFACING

Possible NAICS Codes
237310 – Highway, Street, and Bridge Construction
115310 – Support Activities for Forestry
237990 – Other Heavy and Civil Engineering Construction
236220 – Commercial and Institutional Building Construction
488210 – Support Activities for Rail Transportation
561210 – Facilities Support Services
238990 – All Other Specialty Trade Contractors
238110 – Poured Concrete Foundation and Structure Contractors
238910 – Site Preparation Contractors
488490 – Other Support Activities for Road Transportation

Includes
RESURFACING

Possible NAICS Codes
237310 – Highway, Street, and Bridge Construction
236220 – Commercial and Institutional Building Construction
237990 – Other Heavy and Civil Engineering Construction
238990 – All Other Specialty Trade Contractors
115310 – Support Activities for Forestry

Possible NAICS Codes
561210 – Facilities Support Services
238290 – Other Building Equipment Contractors
236220 – Commercial and Institutional Building Construction
238990 – All Other Specialty Trade Contractors
237990 – Other Heavy and Civil Engineering Construction
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
812220 – Cemeteries and Crematories
561730 – Landscaping Services
238320 – Painting and Wall Covering Contractors
221320 – Sewage Treatment Facilities

Description
Logistics Support Services

Possible NAICS Codes
541614 – Process, Physical Distribution, and Logistics Consulting Services
493190 – Other Warehousing and Storage

Description
Inspection and Laboratory Services (except medical/dental): Railway Equipment

Includes
Includes: Commercial Testing and Laboratory Services

Excludes
Excludes: Medical and Dental Laboratory Services

Possible NAICS Codes
541350 – Building Inspection Services
488210 – Support Activities for Rail Transportation
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
811198 – All Other Automotive Repair and Maintenance
482111 – Line-Haul Railroads
237990 – Other Heavy and Civil Engineering Construction

Description
Rail Freight

Possible NAICS Codes
488210 – Support Activities for Rail Transportation
485999 – All Other Transit and Ground Passenger Transportation
482111 – Line-Haul Railroads
488320 – Marine Cargo Handling
485111 – Mixed Mode Transit Systems
484210 – Used Household and Office Goods Moving
484110 – General Freight Trucking, Local
482112 – Short Line Railroads
334516 – Analytical Laboratory Instrument Manufacturing

Description
Relocation Services

Possible NAICS Codes
484210 – Used Household and Office Goods Moving
531210 – Offices of Real Estate Agents and Brokers
488510 – Freight Transportation Arrangement
488991 – Packing and Crating
423860 – Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
484110 – General Freight Trucking, Local
541614 – Process, Physical Distribution, and Logistics Consulting Services
492110 – Couriers and Express Delivery Services

Description
Other Quality Control, Testing and Inspection Services: Railway Equipment

Possible NAICS Codes
488210 – Support Activities for Rail Transportation
333310 – Commercial and Service Industry Machinery Manufacturing

Description
Other Utilities

Possible NAICS Codes
221320 – Sewage Treatment Facilities
517111 – Wired Telecommunications Carriers
221310 – Water Supply and Irrigation Systems
926130 – Regulation and Administration of Communications, Electric, Gas, and Other Utilities
221122 – Electric Power Distribution
221210 – Natural Gas Distribution
516210 – Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers
561210 – Facilities Support Services
562111 – Solid Waste Collection
221112 – Fossil Fuel Electric Power Generation

Description
Tuition, Registration, and Membership Fees

Possible NAICS Codes
611310 – Colleges, Universities, and Professional Schools
813920 – Professional Organizations
611430 – Professional and Management Development Training
923110 – Administration of Education Programs
611710 – Educational Support Services
813910 – Business Associations
611630 – Language Schools
541990 – All Other Professional, Scientific, and Technical Services
541611 – Administrative Management and General Management Consulting Services

Description
Facilities Operations Support Services

Possible NAICS Codes
561210 – Facilities Support Services
811490 – Other Personal and Household Goods Repair and Maintenance
561720 – Janitorial Services
561920 – Convention and Trade Show Organizers
561730 – Landscaping Services
238220 – Plumbing, Heating, and Air-Conditioning Contractors

Description
Other Administrative Support Services

Possible NAICS Codes
541611 – Administrative Management and General Management Consulting Services
561110 – Office Administrative Services
561320 – Temporary Help Services
561210 – Facilities Support Services
541990 – All Other Professional, Scientific, and Technical Services
541330 – Engineering Services
541511 – Custom Computer Programming Services
561990 – All Other Support Services
622110 – General Medical and Surgical Hospitals
541519 – Other Computer Related Services

Description
Other Professional Services

Possible NAICS Codes
493190 – Other Warehousing and Storage
541611 – Administrative Management and General Management Consulting Services
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services
541330 – Engineering Services

Description
Modification of Equipment: Railway Equipment

Possible NAICS Codes
488210 – Support Activities for Rail Transportation