| 83323 | Undertaking contamination studies of traffic control systems | |
| 83323 | Undertaking contamination studies of tunnels | |
| 83323 | Undertaking contamination studies of waterways | |
| 83327 | Undertaking contamination studies of waterworks | |
| 83310 | Undertaking environmental impact studies of agricultural buildings | |
| 83310 | Undertaking environmental impact studies of airfield runways | |
| 83310 | Undertaking environmental impact studies of bridges | |
| 83310 | Undertaking environmental impact studies of chemical and related facilities | |
| 83310 | Undertaking environmental impact studies of civil engineering works | |
| 83310 | Undertaking environmental impact studies of commercial buildings | |
| 83310 | Undertaking environmental impact studies of dams | |
| 83310 | Undertaking environmental impact studies of elevated highways | |
| 83310 | Undertaking environmental impact studies of harbours | |
| 83310 | Undertaking environmental impact studies of highways | |
| 83310 | Undertaking environmental impact studies of industrial buildings | |
| 83310 | Undertaking environmental impact studies of industrial plants and processes | |
| 83310 | Undertaking environmental impact studies of irrigation works | |
| 83310 | Undertaking environmental impact studies of local cables and related works | |
| 83310 | Undertaking environmental impact studies of local pipelines and related works | |
| 83310 | Undertaking environmental impact studies of long-distance communication lines | |
| 83310 | Undertaking environmental impact studies of long-distance pipelines | |
| 83310 | Undertaking environmental impact studies of long-distance power lines (cables) | |
| 83310 | Undertaking environmental impact studies of manufacturing constructions | |
| 83310 | Undertaking environmental impact studies of mining constructions | |
| 83310 | Undertaking environmental impact studies of non-residential buildings | |
| 83310 | Undertaking environmental impact studies of other construction projects | |
| 83310 | Undertaking environmental impact studies of outdoor recreation facilities | |
| 83310 | Undertaking environmental impact studies of outdoor sport facilities | |
| 83310 | Undertaking environmental impact studies of power plants | |
| 83310 | Undertaking environmental impact studies of railways | |
| 83310 | Undertaking environmental impact studies of residential buildings | |
| 83310 | Undertaking environmental impact studies of roads | |
| 83310 | Undertaking environmental impact studies of streets | |
| 83310 | Undertaking environmental impact studies of subways | |
| 83310 | Undertaking environmental impact studies of the automation of industrial processes | |
| 83310 | Undertaking environmental impact studies of traffic control systems | |
| 83310 | Undertaking environmental impact studies of tunnels | |
| 83310 | Undertaking environmental impact studies of waterways | |
| 83310 | Undertaking environmental impact studies of waterworks | |
| 83221 | Undertaking feasibility studies of urban development | |