Table defining action thresholds for lead in indoor air using NAAQS and background values to determine required cleaning measures.
NYC-WTC_000140647Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
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) cleaning background methods -consider additional monitoring III .1 ug/m^ (orbackground) Determination of local No further action background
*PAHs (settled dust)
NYC-WTC_000140647
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NYC-WTC_000140819
Table defining Tier I, II, and III lead air concentration thresholds with actions ranging from aggressive cleaning to no further action.
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.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.945
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 0.934
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 0.929
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.
2 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 non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.926
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 non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.924
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140820
Table defining Tier I, II, and III action levels for PAHs in settled dust based on residential risk assessments.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.920
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 0.916
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.
3 shared non-person entities · 1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
3 shared non-person entities · 1 shared topics · similarity 0.954
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.
2 shared non-person entities · 1 shared topics · similarity 0.919
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