Semi-annual groundwater monitoring was conducted throughout the Main TCE and Hedquarters plumes
Scheduled quarterly impection of landfill cover and soil vapor monitoring was conducted at OU2
October 2010
Scheduled quarterly impection of landfill cover and soil vapor monitoring was conducted at OU2
Additional KMNO4 injections in remnant hot spot areas of the on-base Main TCE Plume were completed. Injections in ONB-6 were completed.
Injections of BOS-100 in the Carbon Tetrachloride Source Area and SARS were completed.
September 2010
Continued additional KMnO4 injections in remnant hotspot areas of the on-base Main TCE plume. Injections at wells ONB-3 and ONB-4 were completed and injections at well ONB-6 was started.
The following is a list of LAC's remedial activities conducted in previous months:
August 2010
Addtitional KMnO4 injections in remnant hotspot areas of the on-base Main TCE plume were initiated. Injections at well ONB-5 were completed and injections at well ONB-3 were started.
The cover vegetation for OU2 was mowed.
July 2010
Groundwater, surface water, and soil gas monitoring was completed at OU2. The scheduled video survey of storm sewer extension and landfill cover inspection were also conducted.
Semiannual groundwater sampling was completed in the Main TCE plume and Headquarters Area Plume.
Groundwater monitoring wells, temporary piezometers, and former injection points on the approved CDPHE list were abandoned.
Results of the indoor air sampling were reported to homeowners.
June 2010
The 2010 KMnO4 injections in on-base area ONB-2 were completed.
April 2010
The quarterly soil vapor monitoring and cover inspection at Operable Unit 2 were conducted.
January 2010
Completed the January 2010 semiannual closure/performance groundwater monitoring plan in the Main TCE Plume and Headquarters Area.
Completed the January 2010 Indoor Air sampling field program in the designated off-base area of the Main TCE Plume.
Completed the 2009 Environmental Program Annual Status Update.
Performed inspection of external indicators of covenant required subslab depressurized systems.
December 2009
Installed three off-base groundwater montioring wells and two soil gas probes that were previously destroyed or damaged.
Began development of newly installed monitoring wells and field reconnaissance for upcoming groundwater monitoring sampling event.
Performed inspections of external indicators of covenant required subslab depressurization systems.
November 2009
Completed potassium permaganate (KMnO4) groundwater injections within the bedrock in off-base areas OFB-1 and OFB-2.
October 2009
Initiated KMnO4 groundwater injections within the bedrock of off-base area of OFB-1
Conduct environmental orversight during construction and excavation activities.
September 2009
The annual mowing of the landfill vegetative cover and trimming along the boundary fence were completed. The recent repair area was not included in the mowing.
The planned potassium permanganate (KMnO4) groundwater injections in off-base area OFB-4(Stapleton) was initiated and completed; a total of 79,333 gallons of 4% KMnO4 solution were injected into 78 points.
July 2009
The scheduled OU2 Operation Maintenance and Monitoring (OM&M) activities were completed. These include cover inspection and groundwater, surface water, and soil gas monitoring.
The annual video survey of the OU2 stormwater sewer extension were completed.
The semiannual groundwater monitoring for the Main and the Fire Training Zone (FTZ) TCE Plumes were conducted – a total of 59 alluvial monitoring wells and five bedrock monitoring wells were sampled.
On-base KMnO4 groundwater injections at the Building 1432/Outfall Source Area (bedrock and alluvium) of the Main TCE Plume were completed.
Injection of 2,520 pounds of BOS-100® trap and treat in the Source Area Reduction System (SARS) were completed.
Soil and building material sampling was conducted at Building 753.
June 2009
Repairs to the OU2 Eastern Conveyance Channel/Down Slope Channel permanent erosion matting were completed. The erosion matting had been damaged in the March 8th grass fire.
Off-base KMnO4 groundwater injections in the OFB-3 (alluvium) area of the Main TCE Plume were completed.
On-base KMnO4 groundwater injections in both alluvium and bedrock at the Headquarters Source Area were completed.
May 2009
The On-base KMnO4 injections in the Outdoor Firing Range (OFR) Source Area (bedrock) and ONB-6 (alluvium) of the Main TCE Plume was completed.
The on-base KMnO4 injections at the Building 1432/Outfall Source Area (bedrock) of the Main TCE plume was started.
The off-base KMnO4 injections in the OFB-3 (alluvium) area of the Main TCE Plume were started.
April 2009
Landfill surface site walks were conducted to inspect cover after April snowfall/rainfall events pending repair of damage to the surface drainage conveyance from the March 8th grass fire that originated in Westerly Creek Dam wetlands.
Quarterly soil gas monitoring was conducted at OU2.
March 2009
Landfill surface site walks were conducted to inspect cover for damage from March 8th grass fire that originated in Westerly Creek Dam wetlands.
January 2009
The third year of post-closure OM&M monitoring was conducted. Groundwater, surface water, soil vapor monitoring, and cover inspection occurred in January.
The semiannual Groundwater Monitoring Program (GMP) sampling event for the Main TCE Plume, Headquarters (HQ) and Fire Training Zone Plumes was conducted.
Work Plan for the Semiannual Closure/Performance Groundwater Monitoring Program - January 2011, Headquarters Area TCE Plume, December 9, 2010
January 2011 Semiannual Sampling Event - Main TCE Plume Closure/Performance Groundwater Monitoring Program (GMP), December 12, 2010
Post-closure Operation and Maintenance Report - November 2009 through October 2010, Operable Unit 2, December 27, 2010.
November 2010
No documents approved this month
October 2010
Groundwater, Surface Water, and Soil Vapor Monitoring Report, Post-Closure Monitoring - Second Quarter 2010 and Third Quarter 2010, Operable Unit 2, dated October 27, 2010.
September 2010
Results for the July 2010 Semiannual Closure/Performance Groundwater Monitoring Program, Headquarters Area TCE Plume, dated September 3, 2010.
Results for the July 2010 Semiannual Closure/Performance Groundwater Monitoring Program, Main TCE Plume, dated September 3, 2010.
The following is a list of documents approved by CDPHE in previous months.
August 2010
No documents approved this month.
July 2010
No documents approved this month.
June 2010
Work Plan for the Semiannual Closure/Performance Groundwater Monitoring Program, Headquarters Area TCE Plume, Operable Unit 5, dated June 1, 2010.
Letter Work Plan - July 2010 Semiannual Sampling Event - Main TCE Plume, Closure/Performance Groundwater Monitoring Program (GMP) - Operable Unit 5 (OU5), dated June 9, 2010.
Response to CDPHE Comments, Results for the January 2010 Semiannual Closure/Performance Groundwater Monitoring Program - Headquarters Area and Fire Training Zone TCE Plumes, Operable Unit 5, dated June 9, 2010.
Response to CDPHE COmments, Results for the July 2009 Semiannual Closure.Performance Groundwater Monitoring Program - Fire Training Zone TCE Plumes, Operable Unit 5, dated June 9, 2010.
Response to CDPHE Comments, Results for the July 2009 Semiannual Closure/Performance GMP - Main TCE Plume, dated June 9, 2010.
April 2010
Post-Closure Operation and Maintenance Report, November 2008 through October 2009, Operable Unit 2 (OU2) Landfill SIte, dated April 16, 2010.
Letter Completion Report - On-Base and Off-Base Permanganate Injections, Main TCE Plume - Alluvium and Bedrock, Phase 2 Corrective Action, Operable Unit 5, dated April 19, 2010.
Revised Results for the Janaury 2009 Semiannual Closure/Performance Groundwater Monitoring Program - Main TCE Plume, Operable Unit 5, dated April 19, 2010.
Draft 2010 Project Schedule, Privatization 1, dated April 19th, 2010.
Updated Community Involvment Plan, dated April 19, 2010
Groundwater, Surface Water, and Soil Vaopr Monitoring Report, Post-Closure Monitoring - Fourth Quarter 2009 and First Quarter 2010, Operable Unit 2 (OU2) Landfill SIte, dated April 21, 2010.
December 2009
Revision 3 - FInal Well Abandonment Letter Work Plan - Main TCE Plume, and Response tp CDPHE comments, dated December 18, 2009.
November2009
Results for the January 2009 Semiannual Closure/Performance Groundwater Monitoring Program, Main TCE Plume, dated November 9, 2009.
October 2009
Groundwater Sampling Results for 1,4-dioxane, Request for No Further Action, October 6, 2009.
Letter Work Plan Addendum - Off-base Permanganate Injections, Main TCE Plume - Fall 2009, Phase 2 CAP Addendum, October 21, 2009.
Groundwater, Surface Water, and Soil Vapor Monitoring Report, Pos-Closure - Second and Third Quarter 2009, Operable Unit 2 (OU-2) Landfill Site, October 27, 2009.
Building 753 Report and No Further Action Request, October 23, 2009.
Revised Letter Work Plan July 2009 Semmiannual Sampling Event - Main TCE Plume, Closure/Performance GMP, October 27, 2009.
RAB Adjournment Memorandum, October 23, 2009.
September 2009
Results of the OU2 Fire Damage Technical Assessment and Restoration, Operable Unit 2 Landfill Cap, dated September 4, 2009
Filing 16 No Further Action Request, September 22, 2009
Northwest Neighborhood Notice of Completion, September 29, 2009
August 2009
Revised Letter sampling plan for Building 753.
July 2009
Letter Work Plan – On- and Off-Base Permanganate Injections, Main TCE Plume and Headquarters Area TCE Plume – Spring 2009, dated July 1, 2009.
Letter Work Plan Addendum – On- and Off-Base Permanganate Injections, Main TCE Plume and Headquarters Area TCE Plume – Spring 2009, dated July 1, 2009.
Summary Report – Monitoring Well Relocation and Groundwater Sampling, Monitoring Wells MWWCP02 and MWWCP02R, Piezometers TWOFR-01 and TWOFR-02, dated July 1, 2009.
Results for the January 2009 Semiannual Closure/Performance Groundwater Monitoring Program, Headquarters Area and Fire Training Zone TCE Plumes, dated July 1, 2009.
RCRA Facility Assessment Groundwater Data Gaps Follow-on, Thallium Resample and Request for No Further Action – July 8, 2009.
March 2009
Groundwater, Surface Water, and Soil Vapor Monitoring Report, Post-closure Monitoring – 4th Quarter 2008 and 1st Quarter 2009, Operable Unit 2, dated March 25, 2009.
Draft 2009 Schedules – Privatization 1 and Privatization 2, dated March 30, 2009.
February 2009
Draft 2009 Schedule - Privatization 2, dated February 23, 2009.
Summary Report - Carbon Tetrachloride Source Area Remediation, BOS 100® Injection Program, dated February 23, 2009.
RFA Groundwater Data Gaps Follow-on, Sump Inspection - Buildings 849, 905, and 959, dated February 27, 2009.
January 2009
Post-Closure Operation & Maintenance (O&M) Report, November 2007 through October 2008, Operable Unit 2 (OU-2) Landfill Site, dated December 3, 2008.
Waiver of Requirement for Subslab Depressurization, Falcon Point 2, Filing 23, Main TCE Plume, dated December 10. 2008.
December 2008
Modification to Work Plan for the Semiannual Closure/Performance Groundwater Monitoring Program, Headquarters Area and Fire Training Zone TCE Plumes, dated December 26, 2008.
January 2009 Semiannual Sampling Event – Main TCE Plume Closure/Performance Groundwater Monitoring Program, dated December 26, 2008.
Air Force Completes Five-Year Review
In September 2008, the Air Force submitted a Final Five-Year Review to the Environmental Protection Agency (EPA). A five-year review was conducted at the Lowry sites where chosen remedies leave contaminants in place (OU2) or where cleanup activities are still in progress (OU5). The five-year review found the remedial actions at OU2 and OU5 to be protective or expected to be protective, pending evaluation of future monitoring data. The Final Five-Year Review can be found, as AR# 1552, in the Administrative Record.
