36 CONSULTING, ENGINEERING, DESIGNING, FINANCING, BUILDING, PRIVATIZING, OPERATING, MAINTAINING AND MANAGING PUBLIC
40 PRIVATE WATER TREATMENT SYSTEMS AND WASTEWATER TREATMENT SYSTEMS; FINANCING, ENGINEERING, DESIGN AND CONSTRUCTION OF PUBLIC AND PRIVATE WATER AND WASTEWATER FACILITIES
42 ENVIRONMENTAL CONSULTING AND REMEDIATION SERVICES; EMISSIONS MONITORING; GENERAL ENGINEERING; DESIGN, CONSTRUCTION AND CONSTRUCTION MANAGEMENT SERVICES AND OPERATION, MAINTENANCE AND MANAGEMENT SERVICES FOR TREATMENT SYSTEMS IN VARIOUS WATER, WASTEWATER, SLUDGE AND BIOSOLIDS WASTE MANAGEMENT MARKETS