| CSI Code | Short Description | Extended Description |
| 02100 | Site Remediation |
| 02105 | Chemical Sampling and Analysis |
| 02110 | Excavation, Removal and Handling of Hazardous Material |
| 02115 | Underground Storage Tank Removal |
| 02120 | Off-Site Transportation & Disposal |
| 02125 | Drum Handling |
| 02130 | Site Decontamination |
| 02140 | Landfill Construction and Storage |
| 02145 | Groundwater Treatment System |
| 02150 | Hazardous Waste Recovery Process | Air and Stream Stipping Soil Vapor Extraction Soil Washing and Flushing |
| 02160 | Physical Treatment | Coagulation and Flocculation Reverse Osmosis Solidification and Stabilization |
| 02170 | Chemical Treatment | Chemical Precipitation Ion Exchange Neutralization |
| 02180 | Thermal Process | Incineration Thermal Desorption Vitrification |
| 02190 | Biological Process | Aerobic Processes Anaerobic Processes Bio - Remediation |
| 02195 | Remediation Soil Stabilization |