Table defining Tier I, II, and III lead air concentration thresholds with actions ranging from aggressive cleaning to no further action.
NYC-WTC_000140819Folder label: “B.Avaltroni EPA INDOOR AIR TASK FORCE”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Lead (indoor air)
Tier Screening Value Basis Action I 1.5 ug/m^ NAAQS (intended to keep Aggressive cleaning - if 99.5 % of childhood levels persist, take additional population below 30 ug/dl action to reduce exposure II .1 ug/m^ - 1.5 ug/m3 .1 ug/m3 - UBK Lead Model Maintain recommended default value for urban (diligent wet/HEPA) background cleaning methods -consider additional monitoring III . 1 ug/m^ (or background) Determination of local No further action background
NYC-WTC_000140819
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NYC-WTC_000140647
Table defining action thresholds for lead in indoor air using NAAQS and background values to determine required cleaning measures.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140646
Table defining action thresholds for lead in settled dust, ranging from aggressive cleaning to no further action based on concentration.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.941
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 0.935
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140818
Table defining Tier I, II, and III lead dust thresholds in settled dust with corresponding cleaning or monitoring actions.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.927
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 topics · Same agency, volume and box · similarity 0.922
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 topics · Same agency, volume and box · similarity 0.918
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.
1 shared topics · Same agency, volume and box · similarity 0.918
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 0.909
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
1 shared non-person entities · 1 shared topics · similarity 0.948
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.
1 shared non-person entities · 1 shared topics · similarity 0.948
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.
1 shared non-person entities · 1 shared topics · similarity 0.907
machine-extracted · confidence unavailable · Check page ↗1 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