Table defining Tier I, II, and III lead dust thresholds in settled dust with corresponding cleaning or monitoring actions.
NYC-WTC_000140818Folder label: “B.Avaltroni EPA INDOOR AIR TASK FORCE”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document V
Tier I > E-04 cancer risk x 1 yr exposure duration Tier II E-04 x 1 yr - E-04 x 30 yr Tier III < E-04 x 30 yr (or background)
Lead (settled dust)
Tier Screening Value Basis Action I > 40 ug/fE 1)HUD standard for floo rs Aggressive cleaning - if 2) Residential Lead Hazt rd levels persist, take additional Standard (TSCA Section 403) action to reduce exposure II 25 ug/ff (or background) - HUD screening level for Maintain recommended 40 ug/fE floors (diligent wet/HEPA) cleaning methods -consider additional monitoring III < 25ug/ff (or background) HUD screening level or ocal No further action background
I i
NYC-WTC_000140818
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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 0.967
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 0.929
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 0.927
machine-extracted · confidence unavailable · Check page ↗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 0.927
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 0.919
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 0.908
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140645
Documentation establishing Tier I, II, and III action levels for lead and other contaminants based on EPA and HUD guidance.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.905
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 0.946
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 0.945
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · similarity 0.917
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 0.916
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 0.905
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