NYC-WTC_000162746
Duplicate transmission of revised HVAC cleaning procedure documents to DEP and EPA staff.
5 shared non-person entities · Same agency, volume and box · similarity 0.960
machine-extracted · confidence unavailable · Check page ↗Document / 5 pages
HVAC cleaning procedures technical questions comments, Jan 2003
Machine-extracted title · confidence 80%EPA submits detailed technical questions and comments on proposed HVAC cleaning procedures for WTC buildings.
NYC-WTC_000162731–000162735Folder label: “E-mails 2003 M. Gilsenan”
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OCR text
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Procedure 5. Delete: through a window. This does not apply to outdoor units and there are no windows in most basements making it impossible. I have been told by equipment manufacturers that it is not recommended to run two vacuum collection systems in tandem, as it creates a backpressure that can damage the equipment or cause gasket leaks. DOP testing should be by others (Athenica).
Procedure 6. Painters tape is preferable especially for wall mounted grills. Procedure 7. Is containment required for outdoor/roof mounted units or units that are not in spaces accessible to the public? Define "containment".
Procedure 8. Some toilet vents are fabricated of sheetrock. Nylon brushes should be used. Exhaust ducts should be modified as appropriate.
Procedure 10. SSC does not feel it is necessary to wet clean thermal coils for the purpose of this cleaning and does not recommend wet cleaning of coils on outdoor units during the winter months.
Procedure 11. Does not address branches that are greater than 6 feet. When using whips, brushes etc., is a containment reguired?
Procedure 14. SSC recommends removing and cleaning the supply air grills, fire dampers and branch ducts before cleaning the main supply duct as cleaning of these areas after cleaning the main riser may lead to recontamination. Again we should work from the furthest point from the vacuum collection system.
Procedure 15. All filters should be removed and disposed of without discrimination.
NYC-WTC_000162735
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NYC-WTC_000162735Source: NYC Law Department, mirrored locally
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Transmission of revised cleaning procedure documents for exhaust and ventilation systems at the World Trade Center site.
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4 shared non-person entities · 1 shared topics · similarity 0.944
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4 shared non-person entities · 1 shared topics · similarity 0.944
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155880
Document outlining requirements for a consultant to provide full-time asbestos air monitoring during the interior cleaning of 125 Cedar.
4 shared non-person entities · 1 shared topics · similarity 0.943
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Memo from EPA to multiple NYC, state, and federal agencies coordinating WTC environmental response activities and information sharing.
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NYC-WTC_000162721
Transmission of revised cleaning procedure documents for exhaust and ventilation systems at the World Trade Center site.
Similarity score 0.950 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.946 (not a probability)
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Draft cleaning protocol specifying isolation techniques, vacuum collection methods, HEPA equipment use, and contamination control procedures for ventilation ducts.
Similarity score 0.945 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140615
Contract establishing requirements for third-party asbestos monitoring and air sampling in residential buildings near the World Trade Center.
Similarity score 0.945 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162721
Transmission of revised cleaning procedure documents for exhaust and ventilation systems at the World Trade Center site.
Similarity score 0.945 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139101
EPA transmits revised scopes of work documents for the indoor dust cleaning and monitoring program, including cleaning SOW #7 and monitoring SOW #7.
Similarity score 0.945 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Buildings in this record
Machine-extracted building matches; verify each source. Buildings, never households.
- 333 Rector Place · 1 pages · confidence 0.00 · verify page 4
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