12-28-2015 Council Packet - Laserfiche WebLink

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Therefore, containment and disposal per State and Federal Regulations will be mandatory. The Contractor must submit for review and approval to the Engineer and Owner a written plan outlining all the details and equipment the Contractor plans to employ for compliance with the requirements for full containment. In conjunction with full containment, the Contractor shall be responsible to provide adequate dust collection and negative air to the containment system to prevent the release of emissions to the environment and to provide a reduction of dust exposure for workers. B. Recover, remove, and properly dispose all spent abrasives, dust, dirt, paint chips, spent solvent paint containers, and other waste materials, etc. as specified in Article 3.09 of this Section. C. The Contractor expressly agrees to obey the verbal or written direction and instruction of the Engineer, Resident Project Representative, or Owners Representative in determining when the exterior sandblasting operation may proceed or must be suspended due to excessive winds or drift of dust, spent abrasive, and paint chips outside the area of containment. D. Screens used for containment shall be inspected and approved for use by the Engineer, Resident Project Representative, or Owners Representative. Wind screens used for containment shall be solid screens. They shall be UV stabilized, weather and solvent resistant. E. The Contractor shall be fully responsible to provide 100 percent impervious ground coverage in all areas adjacent to the tank for the purpose of ensuring recovery of (a minimum) 95 percent of all spent abrasive, removed paint, and debris from the abrasive blast operation until TCLP testing proves that product is not classified as hazardous. Ground cover shall consist of reinforced plastic or canvas tarps sufficiently overlapped and secured to prevent contamination of the ground by contact of the abrasive and paint chip debris. F. A full containment plan shall be submitted outlining all the details, equipment, containment screens, negative air dust removal equipment, containment structure and installation drawings, other equipment, wind loading calculations, containment support calculations and/or other pertinent information, and inhibitor the Contractor's plans to employ with the blasting operation. 1. The full containment plan must be submitted at the preconstruction meeting for approval. Work on the Project will not begin without an approved visible emissions control plan. 2. This containment plan must be in conformance with Minnesota State Rules 7005.1100 through 7005.1130 and 7005-0550 for the control of fugitive particulate matter and visible emissions. G. The Base Bid includes installing containment shroud lugs for full containment. Containment shroud lugs shall be as recommended for the TEPE Containment Shroud System as manufactured by K & L Manufacturing/Eagle Industries. Containment lugs/mounting pads shall be seal welded to the tank roof. All edges of the lugs/mounting pads shall be ground to a 1/8 inch or greater radius. 3.03 BLAST CLEANING A. Use proper equipment and abrasives when blast cleaning to produce the mil profile recommended by the coating manufacturer. Do not re -use silica sand or flint abrasives. B. The abrasive used shall be of the type that is graded as to proper size, shape, and hardness. It shall be free of contaminants and shall not embed itself in the blasted surface. Silica sand, flint, garnet, or quartz type abrasives shall be chemically washed; dried; dust, dirt, and fines free; resistant to fracture (shattering); and contain no leachable contaminants. Synthetic Carbide, Aluminum Oxide, and Refractory Slag products shall meet the above criteria. THE USE OF REDUCED OR DUST FREE ABRASIVE FOR BLASTING IS REQUIRED FOR BLASTING OF EXTERIOR SURFACES DUE TO CONTAINMENT AND THE CLOSE PROXIMITY OF BUILDINGS AND STREETS. WATER TOWER REPAINTING © 2012 Stantec 1 193803415 09 91 55 - 5