Lowry Air Force Base
- Located approximately 6 miles southeast of downtown Denver.
- Included approximately 1,866 acres located within the city limits of Denver and Aurora.
- Flight operations ceased in 1966 and training mission was expanded.
- Formally closed in 1994 under the Base Realignment and Closure Act (BRAC) of 1988 and the Defense Base Realignment and Closure Act of 1990.
- Now a mixed-use community, including residences, educational facilities, commercial development and recreational areas.
Operable Unit 5 - Sitewide Ground Water
Groundwater contaminants were initially released in the environment at numerous locations at Lowry Air Force Base. The primary origin of contaminant release was into the storm sewers from several on-base facilities including an auto hobby shop.
Other likely sources of contamination include:
Accidental spills or leaks of solvents around firing range facilities.
Disposal of solvents into septic systems at the firing range.
Accidental spills or leaks at the fuel storage area in the vicinity of Uinta Street.
Releases related to fire training activities.
Leakage from fuel tanks at the Yosemite Street Gate Site.
Lowry Assumption Fact Sheet April 2009
- Site Specific Standard:
- International Risk Group (IRG) and its operating entity, Lowry Assumption, requested a no further action determination from the department for Operable Unit 5.
- The department cannot provide an no further action determination because Lowry Assumption has not met the state groundwater standards at the site.
- Lowry Assumption then petitioned the Water Quality Control Commission for site-specific standards.
- The WQCC hearing took place on May 12, 2014. In place of the current TCE standard (5ug/L), LAC was given a site specific standard of 11ug/L on base and 12ug/L off base.
Landfill Zone (Operable Unit 2) environmental concerns
- Fuels and solvents in groundwater and municipal solid waste at an on-site landfill.
- Air Force managed all cleanup activities until 2002.
- In 2002, turned cleanup over to the Lowry Redevelopment Authority and its contractor, Lowry Assumption Corp.
- A Resource Conservation and Recovery Act (RCRA) Consent Agreement was signed in 2002.
- Additional cleanup efforts were privatized in 2005.
- The first Amendment to the Consent Agreement was signed in 2005.
- Signed agreements ensure compliance with state laws and regulations.
- We meet regularly with the Air Force, Lowry Assumption LLC, EPA, the city and county of Denver and the city of Aurora to discuss ongoing environmental investigations and cleanup.
- Consent Agreement.
- First Amendment to the Consent Agreement.
Landfill Zone (Operable Unit 2) summary
- Located in the south-central portion of the former base.
- The Master Plan identified the area as golf/regional open space, which would be turned over to the city and county of Denver.
- We approved construction of a low-permeability soil cap to keep precipitation from seeping into the landfill materials, and required a 30-year post-closure maintenance and monitoring period.
- An environmental covenant was issued to restrict future activities on the property to protect the cap.
Proposed changes to Landfill Zone (Operable Unit 2) — "Lowry Vista"
- The city and county of Denver couldn’t accept responsibility for the contaminated property.
- The landfill was transferred to IRG Redevelopment LLC in 2006.
- IRG Redevelopment is proposing to change the land use to allow for mixed-use residential and commercial/retail called Lowry Vista.
- Any redevelopment would require a significant change in the landfill cap with approval from the Air Force and us.
- Approval of the actual development is the responsibility of the city and county of Denver.
- IRG is developing preliminary plans for the site and discussing redevelopment proposals with the city and county of Denver and us.
Correspondence/related documents 2013:
- Dec. 31, 2013 — State Letter to IRGI: Approval with Modifications and Conditions of the Field Investigation Work Plan and Financial Assurance Cost Estimate.
- Dec. 31, 2013 — State Letter to IRGI Approval with Conditions: Stockpile Financial Assurance Cost Estimate and Stockpile Removal Timeframe Extension.
- Dec. 19, 2013 — Walsh Letter: Lowry Field Investigation Work Plan Financial Assurance.
- Dec. 23, 2013 — State Letter to IRGI: Approval of Revised Cap Penetration Plan.
- Dec. 12, 2013 — IRGI Letter to USAF Re: Lowry Vista Redevelopment.
- Dec. 10, 2013 — Revised IRGI Cap Penetration Plan.
- Dec. 6, 2013 — IRG Field Investigation Work Plan.
- Dec. 2, 2013 — Walsh Letter: Stockpile Financial Assurance Cost Estimate and Stockpile Removal Timeframe Extension, OU2 Landfill Cap Stockpiling.
- Nov. 18, 2013 — State Letter to Air Force Requesting More Information About Plan Proposal.
- Nov. 15, 2013 — State Memo About USAF Assurances in the Soil Stockpile Plan.
- Feb. 26, 2013 — State Comments on Cap Penetration Plan for Subsurface Soil Borings.
- Feb. 26, 2013 — State Approval with Conditions of Revised Request to Stockpile Soil on OU2 Landfill Cap.
- Feb. 6, 2013 — Cap Penetration Plan for Subsurface Soil Borings.
Correspondence/related documents 2012:
- Dec. 7, 2012: Notice Under Covenant: Conceptual Site Plan.
- Dec. 7, 2012: Conceptual Site Plan.
- Nov. 29, 2012: IRG Redevelopment Response to Oct. 19, 2012 Letter.
- Nov. 15, 2012: Town Hall Meeting: State Requirements for Changes to Lowry AFB OU2 Remedy.
- Nov. 12, 2012: Revised Request to Stockpile Soil on OU2 Landfill Cap.
- Nov. 6, 2012: Draft OU2 Cap Penetration Work Plan.
- November 2012: IRG Redevelopment Soil Stockpile Fact Sheet.
- Oct. 19, 2012: State Comments on Request to Stockpile Soil on OU2 Landfill Cap.
- Oct. 19, 2012: Draft Modified Environmental Covenant (superseded by Attachment A of Revised IRGI Cap Penetration Plan dated Dec. 10, 2013).
- Sept. 28, 2012: Request to Stockpile Soil on OU2 Landfill Cap.
Correspondence/related documents 2008:
- Oct. 6, 2008: Colorado Department of Public Health and Environment Comments to Work Plan for Geotechnical Borings on the Landfill Zone.
- Aug. 8, 2008: Letter Work Plan for Geotechnical Borings on Landfill Zone (OU 2).
- July 11, 2008: Colorado Department of Public Health and Environment Comments to Conceptual Revised Closure Plan.
- May 28, 2008: Conceptual Revised Closure Plan (30 percent) for Lowry Vista Redevelopment.
Environmental documents are available for public review during regular business hours at:
Lowry Assumption, LLC
7290 E. 1st Ave.
Denver, CO 80230
Denver, CO 80230