| Year | Month | Action/Results | Action Performed By | Project Number |
| Unknown | Unknown | Suspected landfill, trench-type anomaly observed on 1966 aerial photograph. Located southwest of the intersection of Tenberg Road and East Outer Road. | CSSA | NA |
| 1999 | July-August | EM and GPR geophysical surveys completed at AOC 61. | Parsons ES | RL83 |
| 2000 | January | Collected 3 surface soil samples (SS1-3) and analyzed for VOCS, SVOCs and metals. | Parsons ES | RL83 |
| 2002 | October | Parsons | RL83 | |
| 2003 | February | TCEQ | RL83 |