NYC-WTC_000233286

NYC 9/11 Public Portal Document

(a) Regulated Abatement Work Area Preparation. The regulated abatement work area shall be pre-cleaned, isolated and negative air established in accordance with Subpart 56-7 of this Part.

(b) Use of Amended Water. Areas that may be disturbed during the installation of hangers or other support and framing materials for the enclosure shall be sprayed with amended water. These areas shall be kept damp to reduce airborne asbestos concentrations.

(c) Loose and Hanging Asbestos Material. Loose or hanging ACM, PACM or asbestos material shall be removed in accordance with the requirements of Section 8.4 of this Subpart.

(d) Repair of Fireproofing and Thermal Insulation. After installation of hangers, brackets or other enclosure supports, and before installation of encasement/enclosure sheathing material, damaged areas of fireproofing and thermal insulation shall be repaired using a non-asbestos material as per Section 56-7.2 of this Part. Surfaces shall be prepared and replacement material applied in accordance with manufacturer’s recommendation.

(e) Integrity of Installation. Encasements/enclosures shall be designed to be permanent and shall be constructed to provide an airtight barrier. The encasement/enclosure sheathing material shall be impact resistant and shall be installed with adequate supports, reinforced to withstand local environmental conditions, casual contact and any internal pressures developed within the encasement/enclosure structure.

(f) Utility Maintenance. Utilities shall be lowered as necessary and reinstalled in a manner which allows proper utilization, and does not disturb the integrity of the encasements/enclosures. Utility maintenance shall not require the encasements/enclosures to be opened or disturbed.

(g) Ducts. Ducts insulated with ACM, PACM or asbestos material shall not be encased or enclosed.

(h) Air Plenums. ACM, PACM or asbestos material-insulated air plenums, which are not readily accessible for inspection, shall not be encased or enclosed.

(i) Marking or Labeling. Encased asbestos material shall be conspicuously marked or labeled in order to warn persons of its presence.

(j) Cleanup. Waste cleanup shall be in accordance with Subpart 56-8.5.

(k) Final Cleaning and Clearance Air Sampling. Final cleaning and clearance air sampling shall be in accordance with Subpart 56-9.

56-8.9 Equipment and Waste Container Decontamination and Removal Procedures.

12 NYCRR56 Subparts, Page 83

CITY_21MC100_003235103

NYC-WTC_000233369