NAICS CODES SERVICE LISTING: 221320: Sewer Treatment Facilities 236220: Construction Management, Commercial and Institutional Building 237110: Construction Management, Water and Sewer Line 237310: Construction Management, Highway, Road, Street and Bridge 541330: Engineering Services 541380: Environmental Testing Laboratories or Services 541360: Geophysical Surveying and Mapping Services 541370: Surveying  Mapping (Except Geophysical) Services 541620: Environmental Consulting Services 541712: Environmental Research and Development, Laboratories or Services 541690: Scientific and Technical Consulting Services/Energy Consulting 561110: Office Administrative Services 541690: Safety Consulting Services (D96), Safety Plans and Programs (D97), Training for OSHA Standards (D99), Archaeology (D90)