Addendum defining visual inspection methods and evaluation criteria for HVAC systems impacted by World Trade Center dust.
NYC-WTC_000140299Folder label: “SCOPES OF WORK IN DOOR AIR & CLEANING”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
ADDENDUM #2 World Trade Center Dust Cleaning Program Monitoring Contract Scope of Work
The Environmental Professional shall repair or seal any interior/exterior duct insulation disturbed by the installation of service openings.
6.5.2 Methods of Evaluation
6.5.2.1 Visual Inspection Procedure
The HVAC/Electrical Professional and the Environmental Professional should jointly perform the visual inspection. At minimum, the components listed in 6.5.1.1 shall be inspected.
The visual inspection shall be accomplished using one or more of the following methods:
- direct examination - telescoping inspection mirrors and flashlights inserted through service openings — boroscopes inserted through supply air diffusers or other existing openings - remotely operated video camera
6.5.2.2 Assessment of Conditions
Visual Assessment
All required interior surfaces in contact with the air stream shall be inspected for visible accumulations of dust and/or debris. Inspect all surfaces in contact with the air stream. Information indicates that some of the defining characteristics of WTC-related dust are that it contains extremely fine particles similar to talcum powder in consistency, is light-colored, contains pulverized concrete and/or gypsum wallboard, and may contain asbestos fibers. The visual inspection shall document:
A general description of the appearance of interior surfaces of the various system components. The description for each component will include, but may not be limited to:
interior duct/fan housing surfaces are porous/non-porous interior duct and fan housing surfaces are lined with insulation interior duct and fan housing surfaces are double-walled (i.e. interior insulation with perforated metal cover) filter loading, condition of filters and filter rack interior surfaces are free/not free of visible dust and debris or suspect WTC- related dust and debris description of dust color, level of dust loading that may include: - the depth of dust observed on each component (e.g., less than 1/16 inch, greater than or equal to 1/16 inch.). - the depth and location of dust on ducts and fan housing (i.e., on interior bottom, top and sides of ducts) - visually estimated percentage of surface area with suspect WTC-related dust
NYC-WTC_000140299
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NYC-WTC_000140474
Addendum outlining visual inspection protocols and methods for evaluating World Trade Center dust accumulation in HVAC systems.
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machine-extracted · confidence unavailable · Check page ↗4 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.948
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140473
Addendum specifying accessible HVAC components for inspection and methods for accessing system elements during World Trade Center dust evaluation.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140300
Scope of work detailing evaluation procedures for HVAC systems to assess World Trade Center dust impact and cleaning recommendations.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140475
Criteria for distinguishing WTC dust from other contaminants and determining the need for cleaning or sampling.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140298
Addendum defining inspection scope for HVAC components at World Trade Center sites to assess dust accumulation.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140465
Guidance document providing procedures for evaluating the presence of World Trade Center dust in residential ventilation systems.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140290
Guidance document for determining presence of World Trade Center-related dust in residential ventilation systems in Lower Manhattan.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140476
Protocols for collecting bulk dust samples from HVAC systems and documenting sample locations and conditions.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140301
Technical procedures for collecting, sealing, and labeling bulk dust samples during HVAC system evaluation.
2 shared non-person entities · Same agency, volume and box · similarity 0.914
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140384
Procedures for collecting bulk dust samples, labeling containers, and cleaning respirators following sample collection activities.
2 shared non-person entities · Same agency, volume and box · similarity 0.913
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163408
Second addendum to monitoring scope including HVAC system checklist and inspection procedures.
4 shared non-person entities · similarity 0.949
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NYC-WTC_000140280
Document header reiterating the requirement to preserve World Trade Center documents for potential legal proceedings against the City.
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Draft contract scope defining regulations and procedures for asbestos cleanup and air sampling assistance programs in Lower Manhattan.
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NYC-WTC_000140283
Contract excerpt specifying data submission protocols, laboratory delivery instructions, and monitoring responsibilities for the WTC project.
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NYC-WTC_000140284
Addendum to a City contract requiring contractors to handle property claims and authorizing additional financial retainage for performance security.
Filed in the same folder
NYC-WTC_000140286
Review comments on a proposed scope of work document regarding the roles of technicians and monitors in the World Trade Center cleanup process.
Filed in the same folder