Table defining Tier I, II, and III action levels for PAHs in settled dust based on residential risk assessments.
NYC-WTC_000140820Folder label: “B.Avaltroni EPA INDOOR AIR TASK FORCE”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
*PAHs (settled dust)
Tier Screening Value Basis Action I >9 mg/m^ **Risk-based screening level Aggressive cleaning - if for residential setting levels persist, take additional (E-04 X lyr) action to reduce exposure II .3 mg/m^ - 9 mg/m^ .3 mg/m^ - **Risk based Maintain recommended screening level for residential (diligent wet/HEPA) setting cleaning methods -consider (E-04 X 30 yr) additional monitoring III <.3 mg/m^ (or background) Determination of local No further action background
* benzo(a)pyrene equivalents
NYC-WTC_000140820
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NYC-WTC_000140648
Table establishing risk-based screening levels for polycyclic aromatic hydrocarbons in settled dust with corresponding remediation actions.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.962
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 · Same agency, volume and box · similarity 0.948
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140822
Table defining Tier I, II, and III action levels for dioxin in settled dust with associated cleaning recommendations.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.945
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.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.934
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.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.932
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140821
Table outlining risk-based screening levels for PAHs in indoor air with specific cleaning and monitoring protocols.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.930
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.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.920
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.
1 shared topics · Same agency, volume and box · similarity 0.911
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164862
Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
2 shared non-person entities · 1 shared topics · similarity 0.941
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
2 shared non-person entities · 1 shared topics · similarity 0.941
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.
2 shared non-person entities · 1 shared topics · similarity 0.908
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · similarity 0.907
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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Notice instructing staff to preserve original WTC documents as potential evidence in future legal actions against the City.
Filed in the same folder
NYC-WTC_000140813
Meeting notice for task force discussion of Contaminants of Concern and benchmarks presentation scheduled for April 8, 2002.
Filed in the same folder
NYC-WTC_000140814
Document outlining the creation of a cross-agency group tasked with identifying contaminants of concern and establishing screening levels.
Filed in the same folder
NYC-WTC_000140815
Document detailing the methodology for identifying contaminants of concern and listing seven tentatively identified substances.
Filed in the same folder
NYC-WTC_000140816
Document explaining the exclusion of VOCs and other chemicals from the contaminant of concern list due to trace amounts.
Filed in the same folder