Report establishing health-based screening levels for the indoor environment with cross-agency representation.
NYC-WTC_000151128–000151140Folder label: “CONTRACTS CONTRACTORS - See: $ matrics etc file”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Tier Screening Value Basis Action I >.03 ng/m^ *Risk-based screening level Aggressive cleaning - if for residential setting levels persist, take additional (E-04x lyr) action to reduce exposure II .001 ng/m^ (or background) .001 ng/m^ -♦ Risk based Maintain recommended - .03 ng/m^ screening level for residential (diligent wet/HEPA) cleaning setting methods -consider additional (E-04x30yr) monitoring III < .001 ng/m^ (or Determination of local No further action background) background
*based on proposed dioxin cancer slope factor
Asbestos
Level Recommended actions Comments Air level: Evaluate the need to Screening value in air set at a >0.01 f/cc ♦ remove sensitive level where short term individuals from the exposures (< 1 year) may
Settled Dust level: environment
Evaluate conditions in the area including result in exposures which contribute to
Settled dust threshold is to ^7I
> 100,1 representativeness of air protect to at least a 1X10"^ f/cm^ samples, fibrous glass dust risk estimate for a one year levels and loading. exposure. Air concentrations estimated for difTerent Take actions to reduce activities using a K factors
NYC-WTC_000151137
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NYC-WTC_000164862
Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
15 shared non-person entities · 1 shared topics · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗13 shared non-person entities · 1 shared topics · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162222
EPA staff distributed an environmental laboratory report to federal and city agencies on May 15, 2002.
13 shared non-person entities · 1 shared topics · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140651
Documentation setting dioxin action levels for indoor air and providing initial guidance on asbestos fiber concentration risk estimates.
3 shared non-person entities · 1 shared topics · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140649
Documentation defining action thresholds for PAHs in indoor air based on residential risk assessments and background concentrations.
1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140647
Table defining action thresholds for lead in indoor air using NAAQS and background values to determine required cleaning measures.
3 shared non-person entities · 1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145869
Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
14 shared non-person entities · 1 shared topics · similarity 0.953
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164877
Proposal detailing a survey to assess seven preliminary contaminants in 100 buildings within a four-block radius of the World Trade Center site.
5 shared non-person entities · 1 shared topics · similarity 0.951
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164830
DEP internal memo circulating draft EPA screening level standards for asbestos, fiberglass, and silica in indoor air and settled dust for agency comment.
4 shared non-person entities · 1 shared topics · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140648
Table establishing risk-based screening levels for polycyclic aromatic hydrocarbons in settled dust with corresponding remediation actions.
2 shared non-person entities · 1 shared topics · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140650
Table outlining risk-based screening levels for dioxins in settled dust with specific cleaning requirements for exceeding thresholds.
3 shared non-person entities · 1 shared topics · similarity 0.949
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140823
Table establishing Tier I, II, and III thresholds for dioxin in indoor air with associated cleaning actions.
2 shared non-person entities · 1 shared topics · similarity 0.949
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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A notice instructing that original World Trade Center documents must be preserved as evidence and not disposed of due to potential legal actions.
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Letter confirming contractor responsibility for cleaning residences and HVAC systems in accordance with project scope.
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Confidential cover sheet from the U.S. Environmental Protection Agency regarding a specific confirmation item.
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NYC-WTC_000151148
EPA coordination memo regarding identification and contact of eligible apartment requests for WTC testing and cleaning.
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Summary of issues raised by contractors including chain of custody, mold, lead paint, and payment disputes.
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