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
611710 – Educational Support Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

Includes
Jewelers' Findings; Precious Stones, Cut; Costume Jewelry; Natural Gems and Ornamental Stones, Cut; Clasp, Neckti and Cuff Buttons

Excludes
Watches; Clocks; Tableware; Scientific Instruments; Toilet Articles; Smokers' Articles; Industrial Diamonds.

Possible NAICS Codes
339910 – Jewelry and Silverware Manufacturing
541990 – All Other Professional, Scientific, and Technical Services
459420 – Gift, Novelty, and Souvenir Retailers
332813 – Electroplating, Plating, Polishing, Anodizing, and Coloring
423940 – Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers
339993 – Fastener, Button, Needle, and Pin Manufacturing
458310 – Jewelry Retailers
339999 – All Other Miscellaneous Manufacturing
339920 – Sporting and Athletic Goods Manufacturing
238990 – All Other Specialty Trade Contractors

Includes
Fuel Gases.

Excludes
Military Chemical Gases; Medical Gases (for medical gases use code 6835); Empty Gas Cylinders and their caps, valves, and valve spare parts.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
325120 – Industrial Gas Manufacturing
211130 – Natural Gas Extraction
324110 – Petroleum Refineries
221210 – Natural Gas Distribution

Includes
Electronic Precipitators; Dust Collection Equipment.

Excludes
Fan and Blower Equipment (FSC 4140); Air Conditioning Equipment (FSC 4120).

Possible NAICS Codes
333413 – Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
339113 – Surgical Appliance and Supplies Manufacturing
335210 – Small Electrical Appliance Manufacturing
336110 – Automobile and Light Duty Motor Vehicle Manufacturing