| | REDDING AML 2025 | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $174,797 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 237990Other Heavy and Civil Engineering Construction | Z2KEREPAIR OR ALTERATION OF SURFACE MINE RECLAMATION FACILITIES | Sep 22, 2025 | Sep 22, 2025 | May 31, 2026 |
| | ABANDONED VEHICLE REMOVAL RIFO | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $4,200 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 562219Other Nonhazardous Waste Treatment and Disposal | R499SUPPORT- PROFESSIONAL: OTHER | Feb 11, 2025 | Feb 10, 2025 | Mar 1, 2025 |
| | SMOOTHWIRE FENCE - CERCLA RHMC OU3 | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $33,100 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 238990All Other Specialty Trade Contractors | R499SUPPORT- PROFESSIONAL: OTHER | Aug 31, 2022 | Aug 31, 2022 | Sep 30, 2022 |
| | AML PINTO MOUNTAIN #2 | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $318,962 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 237990Other Heavy and Civil Engineering Construction | Y1KECONSTRUCTION OF SURFACE MINE RECLAMATION FACILITIES | Aug 24, 2022 | Aug 24, 2022 | Feb 20, 2024 |
| | EL MIRAGE BUILDING DEMOLITION IN ACCORDANCE WITH (IAW) THE PERFORMANCE WORK STATEMENT (PWS) | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $18,490 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 238910Site Preparation Contractors | P500SALVAGE- DEMOLITION OF STRUCTURES/FACILITIES (OTHER THAN BUILDINGS) | Jun 6, 2022 | Jun 6, 2022 | Jul 1, 2022 |
| | AML PINTO MOUNTAIN 2021 | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $202,230 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 237990Other Heavy and Civil Engineering Construction | Y1KECONSTRUCTION OF SURFACE MINE RECLAMATION FACILITIES | Sep 21, 2021 | Sep 21, 2021 | Apr 16, 2022 |
| | IGF::OT::IGF | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $207,476 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 238990All Other Specialty Trade Contractors | Y1PZCONSTRUCTION OF OTHER NON-BUILDING FACILITIES | Aug 17, 2015 | Sep 1, 2015 | Sep 30, 2017 |
| | IGF::OT::IGF SILVER MTN AML REMEDIATION | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $130,477 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 238990All Other Specialty Trade Contractors | Y1PZCONSTRUCTION OF OTHER NON-BUILDING FACILITIES | Aug 17, 2015 | Aug 17, 2015 | Sep 30, 2016 |
| | IGF::CT::IGF CONSTRUCT 2 NEST LEDGES FOR NESTING RAPTORS | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $4,500 | FOREST SERVICE | FOREST SERVICE | — | 238190Other Foundation, Structure, and Building Exterior Contractors | N099INSTALLATION OF EQUIPMENT- MISCELLANEOUS | Aug 30, 2014 | Aug 29, 2014 | Dec 31, 2016 |
| | IGF::OT::IGF WHITMORE MINE REMEDIATION | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $174,786 | DEPT OF THE ARMY | BUREAU OF LAND MANAGEMENT | — | 332111Iron and Steel Forging | Y1PZCONSTRUCTION OF OTHER NON-BUILDING FACILITIES | Jun 27, 2014 | Jun 27, 2014 | Jun 26, 2015 |
| | IGF::OT::IGF WHITMORE MINE REMEDIATION | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $0 | DEPT OF THE ARMY | BUREAU OF LAND MANAGEMENT | — | 332111Iron and Steel Forging | Y1PZCONSTRUCTION OF OTHER NON-BUILDING FACILITIES | Jun 19, 2014 | Jun 19, 2014 | Jun 22, 2014 |
| | IGF::OT::IGF AML EASTERN RIVERSIDE COUNTY | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $97,273 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 332111Iron and Steel Forging | Y1PZCONSTRUCTION OF OTHER NON-BUILDING FACILITIES | May 5, 2014 | May 5, 2014 | May 4, 2015 |
| | BATGATE INSERTS | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $0 | FOREST SERVICE | FOREST SERVICE | — | 331210Iron and Steel Pipe and Tube Manufacturing from Purchased Steel | 9510BARS AND RODS | Jul 9, 2013 | Jul 9, 2013 | Jul 31, 2013 |
| | IGF::OT::IGF EAGLE NEST RESTORATION | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $22,514 | US FISH AND WILDLIFE SERVICE | US FISH AND WILDLIFE SERVICE | — | 238990All Other Specialty Trade Contractors | Y1PZCONSTRUCTION OF OTHER NON-BUILDING FACILITIES | Dec 22, 2012 | Dec 22, 2012 | Aug 31, 2013 |
| | SUNLAND AML PHYSICAL REMEDIATION PROJECT | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $51,447 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 562910Remediation Services | F999OTHER ENVIRONMENTAL SERVICES | Sep 13, 2012 | Sep 13, 2012 | Sep 30, 2013 |
| | UMBERCI&CADIZ SUMMIT AML PHYSICAL REMEDIATION PROJECT | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $86,475 | BUREAU OF LAND MANAGEMENT | BUREAU OF LAND MANAGEMENT | — | 562910Remediation Services | Y1KZCONSTRUCTION OF OTHER CONSERVATION AND DEVELOPMENT FACILITIES | Sep 13, 2012 | Sep 13, 2012 | Sep 30, 2013 |
| | BAKER AML PHYSICAL SAFETY REMEDIATION | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $55,702 | DEPT OF THE ARMY | BUREAU OF LAND MANAGEMENT | — | 562910Remediation Services | F999OTHER ENVIRONMENTAL SERVICES | May 18, 2012 | May 8, 2012 | Sep 30, 2014 |
| | MITIGATE SAFETY HAZARDS AT THE BUTCHER KNIFE MINE WITHIN MOJAVE NATIONAL PRESERVE | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $18,100 | NATIONAL PARK SERVICE | — | — | 238910Site Preparation Contractors | Z215 | Apr 29, 2009 | Apr 29, 2009 | Sep 30, 2009 |
| | CONSTRUCT AND INSTALL BAT GATES | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $24,750 | DEPT OF THE AIR FORCE | — | — | 238910Site Preparation Contractors | Y219 | Sep 9, 2008 | Sep 9, 2008 | Oct 15, 2009 |
| | — | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $13,150 | DEPT OF THE ARMY | — | — | 213115Support Activities for Nonmetallic Minerals (except Fuels) Mining | N054INSTALLATION OF EQUIPMENT- PREFABRICATED STRUCTURES AND SCAFFOLDING | Aug 13, 2008 | Aug 13, 2008 | Sep 5, 2008 |
| | — | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $16,009 | DEPT OF THE ARMY | — | — | — | — | Jan 18, 2006 | Jan 18, 2006 | — |
| | — | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $0 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 611430Professional and Management Development Training | U099EDUCATION/TRAINING- OTHER | Nov 15, 2004 | Nov 15, 2004 | — |
| | — | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $0 | FOREST SERVICE | — | — | 423810Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers | B510SPECIAL STUDIES/ANALYSIS- ENVIRONMENTAL ASSESSMENTS | Oct 15, 2002 | Oct 15, 2002 | Sep 15, 2004 |
| | — | FRONTIER ENVIRONMENTAL SOLUTIONS INC | $0 | BUREAU OF LAND MANAGEMENT | — | — | — | R499SUPPORT- PROFESSIONAL: OTHER | Jun 15, 2000 | Jun 15, 2000 | Dec 15, 2000 |