| Site | Location | Date | Consultant/Licensed Installer | Area (ft2) | Depth (ft) | Description |
| Operating Plant Site | Seattle, WA | Apr. 1994 | Roy F. Weston / RCI Environmental, C3 Environmental | 60,000 | 25 - 50 | three enclosures to contain TCE source zones, partially installed within existing warehouse with limited overhead clearance. |
| Hill AFB | Utah | June 1994 | Montgomery Watson / C3 Environmental | 1,560 | 30 | closed cell isolating portion of aquifier for alcohol flushing experiments. |
| Dover AFB | Delaware | Nov. 1994 | CH2M Hill / C3 Environmental | 8,800 | 50 | two side-by-side closed cells to test P & T versus |
| Shell Canada Petrochemical Facility | Toronto, ON | Nov. 1994 | CH2M Hill / C3 Environmental | 18,000 | 15 - 18 | cut-off wall along property boundry to assist with dewatering during excavation of contaminated soils and limit groundwater migration |