For this project we hydro-blasted approximately 110,000 square feet of exterior paint, 235,000 square feet of block filler, pipe insulation, and duct mastic containing asbestos. Several Weeks into the project, the owner’s consultant confirmed two layers of roofing material and a coating of cementitious material (under the paint coating the entire exterior of the building) to contain asbestos. The previously concealed materials increased the complexity and scope of the abatement nearly twofold. Due to the large amounts of water utilized during this project, our team developed a filtration settlement system to keep pace. We were filtering between 20,000-80,000 gallons of water per day. After the abatement was completed on the 11-story dormitory, we utilized our Volvo 700 High Reach Excavator to dismantle the entire structure.
The unforeseen coating of asbestos cementitious material on entire exterior of the building created a large obstacle for regulatory compliance for removal and timely project completion due to how it was adhered to the substrate and the magnitude of the of the quantity, as it was present on the exterior of an 11- story building. Alloy implemented a cost-effective solution for removal, by constructing an exterior scaffold system for access and containment under negative pressure. Utilizing the approach of hydro-blasting for removal, the coating was removed however, this generated a high volume of water which was contaminated with asbestos. Alloy designed and constructed a portable filtration system which recirculated and filtered asbestos particles from the high volume of water generated during blasting allowing for discharge into the sanitary sewer eliminating excessive disposal of contaminated water.
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