| 83392 | Undertaking contamination studies of long-distance pipelines | |
| 83392 | Undertaking contamination studies of long-distance power lines (cables) | |
| 83393 | Undertaking contamination studies of manufacturing constructions | |
| 83393 | Undertaking contamination studies of mining constructions | |
| 83391 | Undertaking contamination studies of non-residential buildings | |
| 83399 | Undertaking contamination studies of other construction projects | |
| 83392 | Undertaking contamination studies of outdoor recreation facilities | |
| 83392 | Undertaking contamination studies of outdoor sport facilities | |
| 83393 | Undertaking contamination studies of power plants | |
| 83392 | Undertaking contamination studies of railways | |
| 83391 | Undertaking contamination studies of residential buildings | |
| 83392 | Undertaking contamination studies of roads | |
| 83392 | Undertaking contamination studies of streets | |
| 83392 | Undertaking contamination studies of subways | |
| 83393 | Undertaking contamination studies of the automation of industrial processes | |
| 83399 | Undertaking contamination studies of traffic control systems | |
| 83392 | Undertaking contamination studies of tunnels | |
| 83392 | Undertaking contamination studies of waterways | |
| 83392 | Undertaking contamination studies of waterworks | |
| 83331 | Undertaking environmental impact studies of agricultural buildings | |
| 83332 | Undertaking environmental impact studies of airfield runways | |
| 83332 | Undertaking environmental impact studies of bridges | |
| 83333 | Undertaking environmental impact studies of chemical and related facilities | |
| 83332 | Undertaking environmental impact studies of civil engineering works | |
| 83331 | Undertaking environmental impact studies of commercial buildings | |
| 83332 | Undertaking environmental impact studies of dams | |
| 83332 | Undertaking environmental impact studies of elevated highways | |
| 83332 | Undertaking environmental impact studies of harbours | |
| 83332 | Undertaking environmental impact studies of highways | |
| 83331 | Undertaking environmental impact studies of industrial buildings | |
| 83333 | Undertaking environmental impact studies of industrial plants and processes | |
| 83332 | Undertaking environmental impact studies of irrigation works | |
| 83332 | Undertaking environmental impact studies of local cables and related works | |
| 83332 | Undertaking environmental impact studies of local pipelines and related works | |
| 83332 | Undertaking environmental impact studies of long-distance communication lines | |
| 83332 | Undertaking environmental impact studies of long-distance pipelines | |
| 83332 | Undertaking environmental impact studies of long-distance power lines (cables) | |
| 83333 | Undertaking environmental impact studies of manufacturing constructions | |
| 83333 | Undertaking environmental impact studies of mining constructions | |
| 83331 | Undertaking environmental impact studies of non-residential buildings | |