NV5 provided claim support services to Chubb Environmental Risk associated with a ~ 30,000-gallon jet fuel release at an Air Force Base. A Caterpillar 345 excavator bucket had struck an unmarked jet fuel fiberglass pipeline at approximately 2 to 3 feet below ground surface during the building of a new tanker truck refueling fillstands and pumphouse/control room building.
NV5 provided technical and regulatory oversight to ensure that the contractor and consultant performed work that was reasonable and necessary to achieve closure with the state’s Department of Environment, Air Force Civil Engineer Center (AFCEC), and United States Army Corps of Engineers (USACOE). NV5 reviewed and provided oversight for 27 soil borings (angled and vertical), 107 soil samples, work plans, and health and safety plans (HASPs).
NV5 also reviewed and commented on the proposed remediation work plan prepared by the consultant. Excavation and disposal was proposed, but soil concentrations had minimal exceedances with groundwater located at 215 ft bgs. A risk-based approach combining additional soil sample data and installation of vapor intrusion barrier and passive soil vapor extraction (SVE) system was recommended by NV5 and accepted by all parties, resulting in a significant savings in claim costs.