Formerly Used Defense Sites

Formerly Used Defense Sites: Page 2 of 2

The Fort Huachuca Final RI/FS report for the Munition Response Sites (MRS) was issued in December 2015.  The Proposed Plan subdivided MRS 02 into 3 new sites (MRS02, MRS03, and MRS04); a public meeting was held in July 2016 with several participants inquiring about the recreational areas of the MRSs along the San Pedro River.  ADEQ received the Final Decision Documents which were dated September 2016.  The USACE chose Institutional Controls ICs to Protect Current and Future Site Users, for MRS 01 (Charleston Maneuver Area) and 02 (Artillery/Mortar Range, Range Safety Buffer Area).  MRS 03 (Artillery/Mortar Range, Potential Target Area A) was determined to require additional investigation and field work, the USACE choose Digital geophysical mapping and Surface / Subsurface Removal of Munitions of Explosive Concern (MEC) to a depth of 2 feet below ground surface with ICs as the remedial action.  MRS 04 (Artillery/Mortar Range, Potential Target Area B), was selected to also be investigated further with MEC Removal from the Surface with ICs to Protect Current and Future Site Users chosen as the remedy. 

ADEQ approved the Sahuarita Air Force Range Quality Assurance Project Plan (QAPP) work plan on June 14, 2017. Technical Project Planning (TPP) and Public Meetings were held in July 2017.  Stakeholders, including ADEQ, City of Tucson, AZ State Lands Department and USACE, discussed the QAPP work plan document during both of these meetings and field work began in July

A stakeholders group has met yearly since July 2001 with ADEQ, USACE and the U.S. Environmental Protection Agency (EPA). The stakeholder's group includes members of tribal nations, U.S. Fish and Wildlife Service, U.S. Forest Service, Arizona State Land Department, U.S. Department of the Interior, U.S. Bureau of Land Management, Mohave County and Pinal County. The annual FUDS management action plan stakeholder's meeting or FUDS forum continues to meet each year.

Public meetings to inform the community of Kingman Gunnery range, Fort Huachuca and Sahuarita Air Force Range site activities are ongoing.  Public involvement plans for the RIs at Fort Huachuca and Kingman have been prepared by USACE.

Status

Kingman Gunnery Range: The USACE is conducting the RI and Feasibility Study (FS) for this site. The draft RI report for 181 investigated parcels was provide by USACE for ADEQ’s review in December 2020. Based on ADEQ’s review comments a revised draft was submitted to ADEQ in April 2021. ADEQ approved the revised draft RI in May 2021 and USACE finalized the document in June 2021. ADEQ’s review of the draft FS Report is expected in late fall 2021, pending USACE submittal. Phase 2 RI sampling was completed in February 2021 for 60 additional parcels. An addendum to the RI and FS will be submitted to ADEQ to provide the risk assessment and remedial action determinations for the Phase 2 parcels.

Fort Huachuca: All four response areas are awaiting funding for the implementation of Institutional Controls and MEC removal where applicable.   

Sahuarita Air Force Range: The munitions field investigation commenced after the TPP and Public Meetings in July 2017. Results of the RI and lengthy field work are pending for late 2018.