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Area of Concern 67
Chronology of Actions/Investigations
| Year | Month | Action/Results | Action | Project |
| Unknown | Unknown | Area includes the concrete pad that sat under a 1250 gallon above ground storage tank and a ditch, located east of Building 90-1 (bluing shop). The tank contained rinsate from floor cleaning activities and was removed in approximately 1997. | CSSA | NA |
| 2001 | January-February | Soil gas survey performed, testing for TCE, PCE, cis-1,2-DCE, trans-1,2-DCE, BTEX, vinyl chloride, toluene, o-xylene, m,p-xylene and benzene. No VOCs detected within the boundaries of AOC 67. | Parsons | DO 5084 |
| 2001 | April | Soil borings completed and samples collected (SB01 � SB03). Lead and chromium samples exceeded background levels. | Parsons | DO 5084 |
| 2002 | October | Final RCRA Facility Investigation Report submitted. | Parsons | DO 5084 |
| 2003 | December | Final TO 0019 Work Plan Addendum submitted. | Parsons | TO19 |
| 2004 | February - May | Excavated soils along drainage ditch and removed concrete slab. Collected 5 samples for VOCs and metals (Ba, Cu, Pb, Cr, and Zn). Waste characterization samples collected. Excavated soil hauled off-post to Covel Gardens. | Parsons | TO19 |
| 2007 | December | Excavated additional soil from drainage ditch. 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
| February | Excavated approximately 2 CY of material was excavated during this event. Excavated material from this event was taken off post with material generated from the 2007 excavation event at AOC‑67 and with the initial excavation and removal activities at AOC‑68. | Parsons | DO11 |
| April | Final confirmation samples collected at two trench locations. | 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 |