AIR, LAND AND WATER POLLUTION AND WASTE CONTROL SERVICES-NAMELY, INVESTIGATION OF POLLUTION SOURCES AND SAMPLING AND TESTING OF AIR, LAND, WATER AND WASTE DISCHARGES FOR TOXIC OR NOXIOUS SUBSTANCES AND ENGINEERING SERVICES
ADVICE, CONSULTATION AND PROBLEM SOLVING SERVICES IN THE FIELDS OF INDUSTRIAL AND GOVERNMENTAL POLLUTION ABATEMENT AND CONTROL
ENGINEERING SUPERVISION AND CONSTRUCTION SERVICES IN THE FIELD OF PROCESS PLANTS AND POLLUTION ABATEMENT AND CONTROL FACILITIES AND PLANTS, AND THE INSTALLATION, MAINTENANCE AND REPAIR OF POLLUTION AND EMISSION ABATEMENT CONTROL EQUIPMENT AND FACILITIES