Table defining action thresholds for lead in settled dust, ranging from aggressive cleaning to no further action based on concentration.
NYC-WTC_000140646Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Lead (settled dust)
Tier Screening Value Basis Action I > 40 ug/ft2 1)HUD standard for floors Aggressive cleaning - if 2) Residential Lead Hazard levels persist, take additional Standard (TSCA Section 403) action to reduce exposure II 25 ug/ft2 (or background) - HUD screening level for Maintain recommended 40 ugZft2 floors (diligent wet/HEPA) cleaning methods -consider additional monitoring III < 25ug/ft2 (or background) HlID screening level or local No further action background
NYC-WTC_000140646
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
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 0.967
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 0.945
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 0.941
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 0.915
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 0.912
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 0.908
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 0.945
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 ↗NYC-WTC_000160878
EPA notice of chain-of-custody and benchmarks presentation for WTC Taskforce meeting on April 8, 2002.
2 shared non-person entities · 1 shared topics · similarity 0.938
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 0.916
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · similarity 0.911
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 0.910
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000164862
Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
Similarity score 0.999 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
Similarity score 0.999 (not a probability)
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.
Similarity score 0.990 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.990 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160878
EPA notice of chain-of-custody and benchmarks presentation for WTC Taskforce meeting on April 8, 2002.
Similarity score 0.989 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000176160
Draft assessment summarizing eight months of monitoring data regarding air, dust, and water contaminants at the WTC site and surrounding areas.
Similarity score 0.984 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.
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