Description
Laboratory Testing Services

Possible NAICS Codes
621511 – Medical Laboratories
541380 – Testing Laboratories and Services
334516 – Analytical Laboratory Instrument Manufacturing
561320 – Temporary Help Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
541990 – All Other Professional, Scientific, and Technical Services
325413 – In-Vitro Diagnostic Substance Manufacturing
541713 – Research and Development in Nanotechnology
621111 – Offices of Physicians (except Mental Health Specialists)
325414 – Biological Product (except Diagnostic) Manufacturing

Description
Chemical/Biological Studies and Analysis

Possible NAICS Codes
541380 – Testing Laboratories and Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
541690 – Other Scientific and Technical Consulting Services
541990 – All Other Professional, Scientific, and Technical Services
541620 – Environmental Consulting Services
325412 – Pharmaceutical Preparation Manufacturing
611310 – Colleges, Universities, and Professional Schools
541713 – Research and Development in Nanotechnology
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
621511 – Medical Laboratories

Description
Other Environmental Services, Studies, and Analytical Support

Possible NAICS Codes
541620 – Environmental Consulting Services
562910 – Remediation Services
541380 – Testing Laboratories and Services
541690 – Other Scientific and Technical Consulting Services
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
562211 – Hazardous Waste Treatment and Disposal
115310 – Support Activities for Forestry
541611 – Administrative Management and General Management Consulting Services

Includes
Laboratory Glassware; Laboratory Funnels; Laboratory Furnaces; Glass Beads; Laboratory White Sand; Litmus Paper; Paper Filters; Insect Transfixion Pins; Laboratory Glass Wool; Laboratory Furniture, except Dental Laboratory.

Excludes
Instruments covered by other classes in group 66; Dental Laboratory Equipment; Laboratory Scales and Balances; In Vitro Diagnostic Substances and Reagents.

Possible NAICS Codes
423450 – Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
334516 – Analytical Laboratory Instrument Manufacturing
339999 – All Other Miscellaneous Manufacturing
339112 – Surgical and Medical Instrument Manufacturing

Description
Water Quality Studies

Possible NAICS Codes
541380 – Testing Laboratories and Services
541620 – Environmental Consulting Services
221310 – Water Supply and Irrigation Systems
541990 – All Other Professional, Scientific, and Technical Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541690 – Other Scientific and Technical Consulting Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
924110 – Administration of Air and Water Resource and Solid Waste Management Programs
541713 – Research and Development in Nanotechnology
611710 – Educational Support 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
721110 – Hotels (except Casino Hotels) and Motels
711510 – Independent Artists, Writers, and Performers
541330 – Engineering Services
541690 – Other Scientific and Technical Consulting Services
611430 – Professional and Management Development Training
541519 – Other Computer Related Services
561320 – Temporary Help Services

Description
Scientific Data Studies

Possible NAICS Codes
541380 – Testing Laboratories and Services
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541620 – Environmental Consulting Services
541713 – Research and Development in Nanotechnology
541611 – Administrative Management and General Management Consulting Services
611310 – Colleges, Universities, and Professional Schools
518210 – Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services

Description
Water Quality Support Services

Includes
Includes: Industrial Investigation Surveys and Technical Support Related to Water Pollution

Possible NAICS Codes
541380 – Testing Laboratories and Services
541620 – Environmental Consulting Services
221310 – Water Supply and Irrigation Systems
562211 – Hazardous Waste Treatment and Disposal
562910 – Remediation Services
924110 – Administration of Air and Water Resource and Solid Waste Management Programs
325998 – All Other Miscellaneous Chemical Product and Preparation Manufacturing
561210 – Facilities Support Services
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services

Description
Other Quality Control, Testing and Inspection Services: Miscellaneous

Possible NAICS Codes
541380 – Testing Laboratories and Services
541990 – All Other Professional, Scientific, and Technical Services
541330 – Engineering Services
541620 – Environmental Consulting Services
541350 – Building Inspection Services
523910 – Miscellaneous Intermediation
488390 – Other Support Activities for Water Transportation
541690 – Other Scientific and Technical Consulting Services
488991 – Packing and Crating
561210 – Facilities Support Services

Description
Environmental Studies and Assessments

Possible NAICS Codes
541620 – Environmental Consulting Services
541380 – Testing Laboratories and Services
562910 – Remediation Services
541611 – Administrative Management and General Management Consulting Services
541690 – Other Scientific and Technical Consulting Services
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
611710 – Educational Support Services

Description
Other Special Studies and Analysis

Possible NAICS Codes
541512 – Computer Systems Design Services
541611 – Administrative Management and General Management Consulting Services
541990 – All Other Professional, Scientific, and Technical Services
541380 – Testing Laboratories and Services
541620 – Environmental Consulting Services
541330 – Engineering Services
541720 – Research and Development in the Social Sciences and Humanities
541690 – Other Scientific and Technical Consulting Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541713 – Research and Development in Nanotechnology

Description
Equipment and Materials Testing: Miscellaneous

Possible NAICS Codes
541380 – Testing Laboratories and Services
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
238220 – Plumbing, Heating, and Air-Conditioning Contractors
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
811210 – Electronic and Precision Equipment Repair and Maintenance
541611 – Administrative Management and General Management Consulting Services
334519 – Other Measuring and Controlling Device Manufacturing
541690 – Other Scientific and Technical Consulting Services
334516 – Analytical Laboratory Instrument Manufacturing

Description
Geological Studies

Possible NAICS Codes
541380 – Testing Laboratories and Services
541990 – All Other Professional, Scientific, and Technical Services
541360 – Geophysical Surveying and Mapping Services
541690 – Other Scientific and Technical Consulting Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
518210 – Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
541620 – Environmental Consulting Services
541713 – Research and Development in Nanotechnology
541511 – Custom Computer Programming Services
213112 – Support Activities for Oil and Gas Operations

Description
Maintenance, Repair and Rebuilding of Equipment: Instruments and Laboratory Equipment

Possible NAICS Codes
811210 – Electronic and Precision Equipment Repair and Maintenance
334516 – Analytical Laboratory Instrument Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
561210 – Facilities Support Services
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334519 – Other Measuring and Controlling Device Manufacturing
541380 – Testing Laboratories and Services
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

Description
Engineering and Technical Services

Includes
Includes: System Engineering, Technical Assistance and Other Services Used to Support the Program Office During the Acquisition Cycle

Excludes
Excludes: Language Translation and Sign Language Interpretation (PSC R608)

Possible NAICS Codes
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
541512 – Computer Systems Design Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541690 – Other Scientific and Technical Consulting Services
541611 – Administrative Management and General Management Consulting Services
541519 – Other Computer Related Services
541620 – Environmental Consulting Services
541713 – Research and Development in Nanotechnology
336611 – Ship Building and Repairing