Matrix Environmental Services, LLC performed two munitions remediation projects at Andersen Air Force Base (total value $4MM) in support of the BRAC realignment of Marine Corps elements to Guam. Munitions clearance of construction footprints to depths exceeding 18 feet in places was concurrently performed for two new flight line hangers - the Pacific Air Power Resiliency Tanker Group Maintenance Hangar and the Strike Fuel Systems Maintenance Hangar. Within 45 days of contract award, Matrix mobilized 29 UXO technicians and additional support personnel to locate and remove Munitions and Explosives of Concern / Material Potentially Presenting and Explosive Hazard (MEC / MPPEH) using conventional mag and dig procedures to the depth of construction or top of bedrock, in 6-inch lifts. Matrix leveraged their local office in Tamuning and staff knowledge to recruit and hire local qualified personnel to fill traffic control and UXO Technician positions and provide administrative support.

Explosive and excavation safety considerations and the natural environmental conditions provided unique challenges for Matrix UXO Technicians that were mitigated by establishing traffic control monitors and conducting on-site training and daily safety briefings. Work was performed at night to limit exclusion safety zone impacts to the flight line and other mission critical operations. Matrix also provided two full-time UXO Safety Officers to provide daytime construction support of the excavation and hauling operations by other (non-UXO qualified) contractors. Matrix responsibilities included preparation of planning documents including work plan, safety plan, traffic control plan, and community outreach materials, supervising subsurface clearance activities, construction support, MEC identification, treatment, storage and final disposition of MPPEH. All work was performed in accordance with Joint Region Marianas Explosives Safety Submission (ESS), NAVSEA OP5 and NOSSAINST 8020.15D. During a site audit by NAVEODTECHDIV, Matrix was commended for their high-quality documentation and was requested to provide copies so they could serve as the standard for future munitions projects on Guam.