18-Grand Theater Hazardous Materials Remediation Phase I Project

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Fungal-Biological Hazard Remediation Protocol Irerracon Grand Theater ■ 21 Lamar Street, Paris, Texas April 11, 2011 ® Terracon Project No. 94117645 porous and semi-porous surfaces. Removal of fungal growth from the referenced surfaces will continue until fungal growth is no longer visible. Stains on the surface of wood, related to the fungal growth that has been removed, should be lightly sanded or wire -brushed to remove the first layer of wood substrate. Run off of aqueous cleaning solutions must be controlled and contained within the defined work areas. Option 2 Carbon Dioxide-Dry Ice Blastinq of Non-Porous and Semi-Porous Substrates The cleaning and decontamination of the first floor lobby ceiling deck will use a Cold Jet Dry Ice machine, or equivalent. Surfaces that cannot be accessed with the dry ice blast procedure will be mechanically cleaned as previously described. After dry ice blast the wood substrate will be HEPA vacuumed and treated with a disinfectant as previously described. Following Option 1 or Option 2 decontamination procedures and visual clearance by the MAC the wood ceiling deck/second floor will be treated with a clear/translucent encapsulant. Dry ice blasting will not be conducted on substrates that exhibit pigeon related biological- hazard material or general loose debris. The wood floor and ceiling joists/deck on the second floor above the lobby may only be cleaned by dry ice blast after pre-cleaning of the pigeon related biological-hazards and general debris. Biological-Hazards Biological material associated with pigeons (feces, carcasses, feathers) will be pre-wetted with a quaternary ammonium chloride disinfectant solution to reduce hydrophobicity and mitigate dust generation prior to handling. The pigeon related biological hazards will be continuously wetted using an airless spray pump as desiccated layers are uncovered during the removal process. The pigeon related biological hazards should not be saturated but lightly misted with the quaternary ammonium chloride disinfectant solution. Examples of approved biocide/disinfectants include Fosters 40/800 (quaternary ammonium chloride), Shockwave0 (quaternary ammonium chloride), or an equivalent product when approved by the MAC prior to application. Material Safety Data Sheets for all chemicals used during the remediation must be maintained onsite by the MRC. The environmental surfaces within the containment area, including floors, walls and other environmental surfaces, should be re-cleaned prior to the Post Remedial Verification (PRV). 10.0 REMOVAL OF BUILDING MATERIALS a) On the first floor lobby non-regulated fungal growth on ceiling tiles, applied ceiling tiles or ceiling the debris will be placed in double bags and discarded as construction debris. - MAC - 0107/11 -i 0- i 2 15 2