Table outlining risk-based screening levels for dioxins in settled dust with specific cleaning requirements for exceeding thresholds.
NYC-WTC_000140650Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
*Dioxin (settled dust)
Tier Screening Value Basis Action I > 70 ng/m^ * ♦Risk-based screening level Aggressive cleaning - if for residential setting levels persist, take additional (E-04 X lyr), 1/10 average action to reduce exposure dietary intake II 2 ng/m^ (or background) - 2 ng/m^ - ♦♦Risk based Maintain recommended 70 ng/m^ screening level for residential (diligent wet/HEPA) cleaning setting methods -consider additional (E-04 X 30 yr) monitoring III <2ng/m2 pr background) Determination of local No further action background
*based on proposed dioxin cancer slope factor
*♦ Methodology based on NYSDOH assessment of office building in Binghamton, NY
Dioxin (indoor air)
NYC-WTC_000140650
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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 · Same agency, volume and box · similarity 0.956
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.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.952
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.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.938
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.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.932
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 0.922
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 0.920
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.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.916
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 0.949
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 0.948
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.
3 shared non-person entities · 1 shared topics · similarity 0.919
machine-extracted · confidence unavailable · Check page ↗3 shared non-person entities · 1 shared topics · similarity 0.918
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 0.918
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