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_000140418
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NYC-WTC_000140297
Addendum defining scope for cleaning World Trade Center dust from ventilation components including ducts, coils, and filters.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140472
Addendum detailing all ventilation system components to be inspected and cleaned, including intake louvers, ducts, coils, blower assemblies, and duct linings at World Trade Center.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.968
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140470
Guidelines for evaluating direct exhaust systems and identifying dust accumulation points in residential ventilation equipment.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.968
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140295
Identification of ventilation system components most likely to have WTC-related dust accumulation, including air intakes, dampers, filters, and downstream components.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.967
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.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.958
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.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.957
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.
9 shared non-person entities · Same agency, volume and box · similarity 0.954
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.
9 shared non-person entities · Same agency, volume and box · similarity 0.953
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140291
Bibliography section listing standards from NADCA and SMACNA required for conducting World Trade Center dust evaluations in HVAC systems.
1 shared non-person entities · Same agency, volume and box · similarity 0.952
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140466
Document listing applicable standards like ACR 2002 and NADCA 97-05 for the assessment and cleaning of HVAC systems.
1 shared non-person entities · Same agency, volume and box · similarity 0.952
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163408
Second addendum to monitoring scope including HVAC system checklist and inspection procedures.
10 shared non-person entities · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162671
EPA forwards revised HVAC cleaning checklist and proposes meeting to brief DEP staff and contractors on implementation procedures.
3 shared non-person entities · 1 shared topics · similarity 0.952
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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.
Filed in the same folder
Draft contract scope defining regulations and procedures for asbestos cleanup and air sampling assistance programs in Lower Manhattan.
Filed in the same folder
NYC-WTC_000140283
Contract excerpt specifying data submission protocols, laboratory delivery instructions, and monitoring responsibilities for the WTC project.
Filed in the same folder
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