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Chronology of Actions/Investigations
Area of Concern 68
| Year | Month | Action/Results | Action | Project |
| Prior to 1960 | Unknown | Area includes metal slag/debris storage area from Wheelabrator operations adjacent to Building 90-2. | CSSA | NA |
| 2001 | January - February | Two soil gas survey samples were collected and analyzed for chlorinated and aromatic volatile organics. No target VOC compounds were detected. | Parsons | DO 5084 |
| 2007 | December | Excavated soil/Wheelabrator waste around Building 90-2. Approximately 50-60 CY of material were excavated from both AOC-67 and AOC-68. Additional waste characterization and confirmation samples collected. | Parsons | DO11 |
| 2008
| April | Investigation and confirmation samples collected at four locations. | Parsons | DO11 |
| November | Excavation/removal and confirmation/site delineation sampling conducted at two locations. Approximately 15 CY of material removed and hauled off-post. | Parsons | DO11 | |
| 2010
| May | Release Investigation Report submitted to TCEQ. | Parsons | DO11 |
| September | Closure of AOC-67 and AOC-68 approved by TCEQ. | TCEQ | NA |