NYC-WTC_000233286

NYC 9/11 Public Portal Document

collected in the building or structure, within ten (10) feet of the duct system.

(6) If remote decontamination units are used, one (1) sample shall be collected at the entrance to and exit from each personal decontamination and waste decontamination enclosure.

(c) Work Stoppage Criteria During Phase II A Abatement Procedures. If air samples collected outside the regulated abatement work area, indicate airborne fiber concentrations at or above 0.01 fibers per cubic centimeter, or the established background level, whichever is greater, work shall stop immediately for inspection and repair of barriers and negative air ventilation systems as necessary. Clean up of surfaces outside of the regulated abatement work area using HEPA-vacuums and wet-cleaning methods shall be performed prior to resumption of work area preparation activities. A summary of clean up activities and the results of barrier inspections including any necessary repairs, shall be documented in the supervisor’s daily project log. Work methods shall be altered accordingly to reduce fiber concentrations to acceptable levels. No ACM, PACM or asbestos material shall be disturbed during Phase HA activities. 56-7.2 Materials and Equipment. (a) Storage of Materials. Asbestos Project non-ACM preparatory and waste transfer materials (i.e. plastic sheeting, duct tape, clean waste containers, etc.) shall be stored to prevent damage or contamination. Replacement materials shall be stored outside all project regulated abatement work areas, staging areas and waste transfer/storage areas until Phase II C is completed. (b) Damaged or Deteriorating Materials. Damaged or deteriorating non-ACM materials shall not be used and shall be removed from the premises. (c) Fireproofing or Insulation Protection. When ACM, PACM or asbestos material that has been used for fireproofing or insulation protection has been removed as part of an asbestos project, and the building is not scheduled for demolition or replacement of the affected building system, protection at least equivalent to that removed, shall be installed and maintained by the building/structure owner in conformance with all applicable codes. (d) Adhesive Materials. Duct tape and spray adhesive shall be capable of sealing joints of adjacent sheets of plastic, facilitating attachment of plastic sheets to finished or unfinished surfaces of dissimilar materials and adhering under both dry and wet conditions. (e) Caulks. Non-ACM products shall be used to seal openings and penetrations during regulated abatement work area preparation and installation of critical barriers. (f) Containers. Watertight lockable containers shall be provided to receive and retain any asbestos containing or contaminated material for storage until disposal. The containers shall be marked with danger labels.

12 NYCRR56 Subpart?, Page 49

CITY_21MC100_0 03235069

NYC-WTC_000233335