Details on testing eight different vacuuming and cleaning techniques in rental units to evaluate dust control effectiveness.
NYC-WTC_000140696Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Craftsman.
Test B (Equipment Selection) Cleaning will be conducted in two units with basic vacuums as used in Test A but with the addition of a negative air machine (NAM). The NAM produces a negative pressure differential which will serve to capture dust particles through HEPA filtration that become airborne as a result of the cleaning activities.
Scenario 2: (Selection Criteria) Same or similar to Scenario 1.
Test A (Equipment Selection) Cleaning will be conducted in two units using HEPA filtered upright vacuums and HEPA filtered shop vacuums which are available from Hoover, Eureka, Rigid and Craftsman. The upright vacuums from Hoover and Eureka were provided to residents of lower Manhattan, by FEMA and the Red Cross for cleaning of their occupied space.
Test B (Equipment Selection) Cleaning will be conducted in two units using the same vacuums in Test A but with the addition of a NAM.
Scenario 3: (Selection Criteria): Same or similar to Scenario 1.
Test A (Equipment Selection) Cleaning will be conducted in two units using commercial quality HEPA filtered vacuums. These vacuums will be purchased from Nilfisk Advance Vacuum Systems. Vacuums of this type were used by management companies for cleaning residential/commercial spaces in lower Manhattan after the WTC attack.
Test B (Equipment Selection) Cleaning will be conducted in two units using the same vacuums in Test A but with the addition of a NAM.
Scenario 4: (Selection Criteria) Units have a direct exposure to ground zero. Windows were blown out as a result of the WTC collapse. Accumulation of dust on horizontal surfaces measures in inches. This scenario represents a severely impacted space with heavy accumulations of dust and debris. The two commercial spaces (Units 1 and Unit 2) in the building fit this criteria. Both spaces have wall to wall carpeting and acoustical ceiling tiles.
Test A (Equipment Selection) Cleaning will be conducted in both units using Nilfisk HEPA filtered vacuums. Debris that cannot be vacuumed will be manually removed and disposed of. Due to the excessive amount of dust, a minimum of 2 NAM will be used to control airborne dust. Cleaning will continue until all visible dust has been removed.
Test B (Wet Wiping) Additional cleaning of wall surface areas will be conducted to remove any dust residues that may not have been removed by vacuuming. Wiping of the walls with a damp soapy cloth will be performed to remove residual dust that may have adhered to the walls from the force of the collapse.
NYC-WTC_000140696
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NYC-WTC_000140760
Description of four testing protocols for residential and commercial vacuum cleaning methods to remove WTC dust.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.916
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140504
Contract introduction outlining EPA and DEP assistance programs for residential air sampling and cleaning after the World Trade Center collapse.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.914
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140420
Draft contract outlining compliance requirements and direct assistance program details for residential dust cleaning south of Canal Street.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.911
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140551
Draft contract scope for WTC dust cleaning south of Canal Street including asbestos sampling and HEPA vacuuming.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.911
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140695
Excerpt describing office space requirements, access agreements, and building safety inspections for the WTC cleaning study.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.911
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140517
Departmental comments and requests for clarification regarding cleaning triggers, clearance levels, and supervision requirements.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.910
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140603
Contract establishing requirements for third-party asbestos monitoring and air sampling in residential buildings.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.909
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165014
Memo from EPA to multiple NYC, state, and federal agencies coordinating WTC environmental response activities and information sharing.
4 shared non-person entities · 1 shared topics · similarity 0.929
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160257
Extensive EPA-distributed memo coordinating federal, state and local agency response to World Trade Center environmental issues.
4 shared non-person entities · 1 shared topics · similarity 0.927
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151471
Letter advising EPA that DEP's Bureau of Environmental Compliance reviewed the draft cleaning contract scope for World Trade Center indoor dust cleaning.
2 shared non-person entities · 1 shared topics · similarity 0.911
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154306
Letter from DEP Bureau of Environmental Compliance reviewing the draft scope of work for the World Trade Center indoor dust cleaning program.
2 shared non-person entities · 1 shared topics · similarity 0.908
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149899
Proposal for sampling and assessing building interiors in the vicinity of the World Trade Center site.
4 shared non-person entities · 1 shared topics · similarity 0.908
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
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NYC-WTC_000140640
Notice instructing staff to preserve original World Trade Center documents as potential evidence in future legal actions against the City.
Filed in the same folder
NYC-WTC_000140641
Agenda for a meeting discussing status of activities, public requests, and development of sampling and cleaning plans for WTC debris.
Filed in the same folder
NYC-WTC_000140642
Introduction to a cross-agency group tasked with identifying contaminants of concern and establishing health-based screening levels for the indoor environment.
Filed in the same folder
NYC-WTC_000140643
Documentation describing the methodology for identifying contaminants of concern using historical data and qualitative toxicity screens.
Filed in the same folder
NYC-WTC_000140644
Summary of contaminants removed from the review list due to being non-detectable or found only in trace amounts, including all VOCs.
Filed in the same folder