Fax cover sheet from J.C. Broderick & Associates, Oct 2001

NYC 9/11 Public Portal Document

L. SIDING AND ROOFING ABATEMENT FOR DEMOLITION OF STRUCTURE WORK ONLY (Not Applicable)

For removing roofing material which contains ACM the contractor shall ensure that the following practices are followed:

• Roofing material shall be removed in an intact state to the extent feasible.

• Wet methods shall be used to remove roofing materials that are not intact, or that will be rendered not intact during removal, unless such wet methods are not feasible or will create safety hazards.

• Cutting machines shall be continuously misted during use, unless a competent person determines that misting substantially decreases worker safety.

• When removing built-up roofs with asbestos-containing roofing felts and an aggregate surface using a power roof cutter, all dust resulting from the cutting operation shall be collected by a HEPA dust collector, or shall be HEPA vacuumed by vacuuming along the cut line. When removing built-up roofs with asbestos-containing roofing felts and a smooth surface using a power roof cutter, the dust resulting from the cutting operation shall be collected either by a HEPA dust collector or HEPA vacuuming along the cut line, or by gently sweeping and then carefully and completely wiping up the still-wet dust and debris left along with cut line.

• Asbestos-containing material that has been removed from a roof shall not be dropped or thrown to the ground. Unless the material is carried or passed to the ground by hand, it shall be lowered to the ground via covered, dust-tight chute, crane or hoist.

• Any ACM that is not intact shall be lowered to the ground as soon as it practicable, but in any event no later than the end of the work shift. While the material remains on the roof it shall either be kept wet, placed in an impermeable waste bag, or wrapped in plastic sheeting.

• Intact ACM shall be lowered to the ground as soon as is practicable, but in any event no later than the end of the work shift.

• Upon being lowered, unwrapped material shall be transferred to a closed receptacle in such manner so as to preclude the dispersion of dust.

• Roof level heating and ventilation air intake sources shall be isolated or the ventilation system shall be shut down.

Notwithstanding any other provision of this section, removal or repair of sections of intact roofing less than 25 square fee in area does not require use of wet methods or HEPA vacuuming

NYC-WTC 000104878