Camp Navajo Installation Restoration Program | Site History: Page 2 of 2

Proposed plans were prepared for the closure activities. Closure activities at Camp Navajo are conducted in accordance with the Army’s IRP for non-NPL sites as authorized by the Defense Environmental Restoration Program 10 USC Chapter § 2701-2708 and 2810.
2006: Record of Decisions (ROD's) were pending for 29 of the sites. After the RODs are approved those sites will be considered closed. Five sites required LTM. The LTM activities included groundwater monitoring and five-year reviews (FYR).

2007: The annual technical project planning meeting was held in February. Representatives from the NGB and the ADEQ agreed that RODs will replace decision documents for all future activities related to the LTM of the facility. ADEQ reviewed the LTM groundwater monitoring report for NAADs 11B, 14D, 14G, 40 and 43. ADEQ recommended the continuing monitoring of perchlorate in the wells. Camp Navajo continued to conduct groundwater monitoring and reporting at all LTM sites.

2008: ADEQ and the NGB reviewed the LTM reports and discussed the decreased monitoring activities for the IRP long-term sites. The NGB prepared monitoring reports for fall 2008 which will be evaluated to determine what remedial actions will be taken for closure of the area.

2009: The NGB prepared the LTM sites for decreased monitoring activities and closure.

2010: A FYR report for five installations, IRP sites was submitted in the summer. The LTM sites started ramp-down procedures as outlined by the LTM sites workplan. The five sites LTM decision document was approved in the fall.

2011: In May 2011, the groundwater monitoring results were submitted in the fall 2010 LTM report for NAADs 11B, 14D, 14G, 40 and 43. In accordance with an approved ramp-down process, select groundwater monitoring wells would continue to be sampled for select analytes. NGB explored funding sources to continue monitoring and reporting.

2012: In July, a revised workplan to continue LTM sites groundwater monitoring was developed. Select wells and limited analyses continued (approved ramp-down procedures).

A former outdoor storage yard (furnace debris storage area) was targeted for minor surface clearance and clean-up in fall.

2013: NGB is continuing LTM at several sites. Long-term protectiveness of the removal actions will continue to be monitored by groundwater sampling during the LTM program. Current data indicates that the remedies are functioning as intended at the sites.

A former outdoor storage yard (furnace debris storage area) was surface-cleared during fall 2012.

ADEQ executed a decision document which administratively closed seven sites deemed ineligible for the IRP. The seven sites were either duplicates of other sites, resulted from IRP-ineligible activities, or involved IRP-ineligible contaminants. Concerns associated with the seven sites were addressed by other site-specific IRP activities or other programs. No further response action was deemed necessary and the IRP status is considered response complete.