Guidelines for evaluating asbestos air levels and settled dust thresholds to determine if sensitive individuals should be removed.
NYC-WTC_000140824Folder label: “B.Avaltroni EPA INDOOR AIR TASK FORCE”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Level Recommended actions Comments Air level: Evaluate the need to remove Screening value in air set at a level >0.01 free * sensitive individuals from the where short term exposures (< 1 year) environment may result in exposures which contribute to Evaluate conditions in the area Settled Dust level: including representativeness of air Settled dust threshold is to protect to > 100,000 fZcm^ samples, fibrous glass dust levels at least a IXIO"^ risk estimate for a one and loading. year exposure. Air concentrations estimated for different activities using Take actions to reduce exposures. a K factors based on Millette’s work - clean area on asbestos. Risk estimate is based on - resample estimates of air levels, and duration of - ongoing cleaning exposure for different activities. (100,000frcm2 corresponds to a 3x10- 5 risk for a one year exposure)
NYC-WTC_000140824
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000140825
Criteria for determining necessary actions when asbestos levels exceed background, including resampling and ongoing cleaning protocols.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140652
Guidance document defining actions for elevated asbestos fiber levels in air and settled dust based on NYC background concentrations.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.963
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 0.938
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163599
Draft screening levels for asbestos, fiberglass and silica in indoor air and settled dust.
2 shared non-person entities · 1 shared topics · similarity 0.939
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164830
DEP internal memo circulating draft EPA screening level standards for asbestos, fiberglass, and silica in indoor air and settled dust for agency comment.
2 shared non-person entities · 1 shared topics · similarity 0.939
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 0.933
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.
2 shared non-person entities · 1 shared topics · similarity 0.932
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164455
Correspondence discussing draft EPA screening levels for asbestos and silica in indoor air and settled dust during post-WTC response.
2 shared non-person entities · 1 shared topics · similarity 0.932
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 0.931
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 0.931
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139634
DEP memo forwarding EPA draft screening level calculations for asbestos, fiberglass, and silica in indoor air and settled dust for review.
2 shared non-person entities · 1 shared topics · similarity 0.929
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · similarity 0.924
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000160878
EPA notice of chain-of-custody and benchmarks presentation for WTC Taskforce meeting on April 8, 2002.
Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140825
Criteria for determining necessary actions when asbestos levels exceed background, including resampling and ongoing cleaning protocols.
Similarity score 0.987 (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 0.986 (not a probability)
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.
Similarity score 0.983 (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 0.983 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140652
Guidance document defining actions for elevated asbestos fiber levels in air and settled dust based on NYC background concentrations.
Similarity score 0.981 (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.
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