NYC-WTC_000233286

NYC 9/11 Public Portal Document

B work for each regulated abatement work area on the project. The critical and isolation barriers shall be removed only after satisfactory clearance air sampling results have been obtained. (4) Removal of Mounted Objects and Elevator Isolation. Regulated abatement work area preparation shall also comply with 7.11 (c-d). (5) Plasticizing. The ceiling, walls and floor need not be plasticized as per section 56-7.11 (e) for manual or chemical removal methods. (c) Removal. Removal of ACM and asbestos material shall proceed as per the requirements of Subpart 56-8. (d) Final Cleaning and Clearance Procedures. Final clean-up and clearance procedures for abatement shall comply with Section 56-9, except that only one stage of cleaning (final) is to be performed. Lockdown encapsulant use shall be consistent with Section 9.1(b). (e) Final Waste Removal From the Site. The requirements of Subpart 56-10 shall apply, once all asbestos project regulated abatement work areas have been completed. 56-11.8 Abandoned Pipe/Duct/Conduit Wrap and Cut Removal. The following Phase II abatement procedures shall apply for wrap and cut removal of asbestos­ containing or ACM covered abandoned pipes/ducts/conduits. All other requirements of this Part shall apply:

(a) Air Sampling and Analysis. Air sampling and analysis on an asbestos project conducted under this Section shall be conducted in accordance with the requirements of Subpart 56-4 of this Part. (b) Regulated Abatement Work Area Preparation. (1) Establishment of Regulated Abatement Work Areas. Each regulated abatement work area shall be established and signage posted as per the requirements of Section 56-7.4. Each regulated abatement work area shall remain vacated except for certified workers until satisfactory clearance air sampling results have been obtained or the asbestos project is complete. (2) Preliminary Preparation. Regulated abatement work area preparation shall also comply with Section 56-7.1 through Section 7.11 (d). (i) Exception. For exterior regulated abatement work areas with ACM, PACM or asbestos material intact, establishment of negative air systems as per Section 56-7.8, and installation of isolation barriers as per Section 7.11(b) is not required. Remote decontamination system enclosures are allowed for exterior regulated abatement work areas. (3) Critical Barriers. Prior to the placement of critical barriers, affected surfaces shall be pre-cleaned using HEPA-filtered vacuum equipment and wet cleaning methods. All critical barriers shall be installed as per Section

12 NYCRR56 Subpart 11, Page 108

CITY_21MC100_0 03235128

NYC-WTC_000233394