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Asbestos contractor scope of work for interior cleaning

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A scope of work document detailing interior cleaning by a licensed asbestos contractor at 114 Liberty Street.

NYC-WTC_000100859–000100878

Folder label: “114 LIBERTY STREET 1001041, 52/7502

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NYC 9/11 Public Portal Document

(B) Visual Inspection: The HVAC system shall be visually inspected by the Project Monitor to ensure that no visible contaminants are present.

1. If no contaminants are evident through visual inspection, the HVAC system shall be considered clean; however, the NYCDEP reserves the right to further verify system cleanliness by requiring the contractor to re-clean portions or the entire air handling system.

2. If visible contaminants are evident through visual inspection, those portions of the system where contaminants are visible shall be re-cleaned and subjected to re-inspection for cleanliness.

3. Cleanliness verification shall be performed immediately after mechanical cleaning and before the HVAC system is restored to normal operation.

(D) Verification of Coil Cleaning

1. Cleaning must restore the coil to a visually clean condition on the upstream and downstream portions of the coil. The coil will be considered clean only if the coil is free of foreign matter and chemical residue, based on a thorough visual inspection (see NADCA Standards).

2.07 Pre-existing System Damage

(A) Contractor is not responsible for problems resulting from prior inappropriate or careless cleaning techniques of others.

2.08 Post-project Report

(A) At the conclusion of the project, the Contractor shall provide a report to the NYCDEP indicating the following:

1. Success of the cleaning project, as verified through visual inspection.

2. Areas of the system found to be damaged and/or in need of repair.

2.09 Applicable Standards and Publications: The following current standards and publications of the issues currently in effect form a part of this specification to the extent indicated by any reference thereto:

(A) National Air Duct Cleaners Association (NADCA): "ACR-2002, Assessment, Cleaning & Restoration of HVAC Systems," 2001.

(B) National Air Duct Cleaners Association (NADCA): "Understanding Microbial Contamination in HVAC Systems," 1996.

(C) National Air Duct Cleaners Association (NADCA): "Introduction to HVAC System Cleaning Services," 2002.

(D) National Air Duct Cleaners Association (NADCA): Standard 05 "Requirements for the Installation of Service Openings in HVAC Systems," 1997.

(E) Underwriters' Laboratories (UL): UL Standard 181.

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I NYC-WTC 000100875

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NYC-WTC_000100875Source: NYC Law Department, mirrored locally

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