Deconstruction/Waste Management

Mountain Home AFB, WA

$780K, 2008-09

Bay West provided hazardous material abatement and deconstruction of 62 residential units at the Dunes Demolition Sites under a performance-based contract.

The Base plans to remove dozens of residential structures over the next few years and a major goal is to divert construction and demolition (C&D) materials from landfill disposal by maximizing salvage, reuse, and recycling. Deconstruction, versus standard machine demolition, was one way Bay West helped the Base accomplish their goal.  The diversion goal was set at 50% of C&D material diverted from landfill disposal; Bay West achieved 142% of the diversion goal (71.5% vs. 50% diversion) by proactive management of the associated waste streams.  In addition, the project finished well ahead of schedule. Bay West received an Outstanding CCASS rating from the US Army Corps of Engineers for this project.

Bay West performed deconstruction on 62 residential units (over 88,000 sf) at the Base, including the associated car ports, driveways, and cul-de-sac roadways.  Asbestos and hazardous material surveys were conducted before demolition to identify and remove all hazardous components and to maximize the amount of building material that could be reused or diverted from landfill. A total of 20 tons of ACM and hazardous material were removed and over 4,300 tons of material was diverted to recycling/reclaim. Utilities were cut and capped in coordination with base public works. Dozens of trees that had been identified for removal by the base arborist were removed to enhance growth of adjacent foliage near the demolished structures. The demolition site and cul-de-sacs were restored by grading and hydro seeding of the complete disturbed area and long-term security fencing was installed surrounding the entire work area to limit future public access.

Air quality was of particular concern during this project due to Base past practices that were deemed of concern to EPA and Idaho DEQ agency personnel.  Bay West took all necessary measures to ensure work was conducted to satisfy the regulations and both agencies and passed the Idaho DEQ’s compliance inspection.

Due to the increased concern from EPA and Idaho DEQ and past practices at the Base, chlorinated pesticides and lead -contaminated soils were of particular concern.  There was close coordination of all sampling between Bay West, Base environmental, and regulators during work planning and field sampling.   Real time correspondence was continued during sampling with IDEQ to confirm sampling and analysis needs.  All testing (air monitoring, personnel monitoring, soil pesticides and lead) was performed by a NELAP accredited lab using EPA S-846 methodologies.