| 1987 |
Petroleum contamination found in terminal soils and groundwater |
| 1987 |
NDEP issues order to the terminal to investigate and clean up contamination
|
| 1988 |
Terminal soil and groundwater investigations conducted |
| 1989 |
Terminal free product recovery system installed; petroleum contamination found in railyard soils and groundwater, chlorinated solvents detected in groundwater |
| 1989/90 |
NDEP issues orders to the nine other parties who owned or leased property at the terminal to investigate and clean up contamination |
| 1991 |
Railyard free product recovery system installed; EPA issues Administrative Order
|
| 1991 |
Reluctance on the part of the companies to conduct an off-site investigation forces NDEP to file civil action against all 10 companies
|
| 1991 |
Congressional hearings were held and EPA issues Administrative Order to all 10 companies
|
| 1992 |
Removal Action Plan including a site assessment and 11 removal actions
|
| 1995 |
NDEP settles legal action |
| 1995 |
Installation of site wide groundwater extraction and soil vapor extraction system
|
| 1997 |
Regional Flooding and Formation of the Sparks Marina Park Lake |
| 1998 |
Denitrification system installed; phytoremediation demonstration area built
|
| 1999 |
Hot Spot soil vapor extraction, air sparging, and high pressure oxidation of MTBE
|
| 2000 |
EPA lifts Administrative Order (pending)
|
Time Line