Criteria for determining necessary actions when asbestos levels exceed background, including resampling and ongoing cleaning protocols.
NYC-WTC_000140825Folder label: “B.Avaltroni EPA INDOOR AIR TASK FORCE”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Air level: Evaluate conditions in the area For those areas where air levels would NYC background including representativeness of air not warrant removal of sensitive - 0.01 fZee * samples, fibrous glass dust levels individuals, but are above the 0.001 and loading. fee, continued cleaning and Or evaluation is prudent.
Settled Dust level: If air samples were not taken, then Settled dust threshold is to protect to appropriate air sampling should be at least a IXIO"^ risk estimate for a 30 10,000 fem^ conducted to determine if fiber year exposure. Air concentrations To levels are elevated. estimated for different activities using 100,000 fem^ a K factors based on Millette’s work Take actions to reduce exposures. on asbestos. Risk estimate is based on - clean area estimates of air levels, and duration of - resample exposure for different activities. - ongoing cleaning (10,000fcm2 corresponds to a 1x10-4 risk for a 30 year exposure)
NYC-WTC_000140825
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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 0.982
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140824
Guidelines for evaluating asbestos air levels and settled dust thresholds to determine if sensitive individuals should be removed.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.973
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 0.926
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_000163599
Draft screening levels for asbestos, fiberglass and silica in indoor air and settled dust.
2 shared non-person entities · 1 shared topics · similarity 0.937
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 0.934
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 0.933
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 0.933
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 0.931
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154652
Internal tracking document for managing reports, comments, and actions related to environmental compliance cases.
2 shared non-person entities · 1 shared topics · similarity 0.920
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · similarity 0.920
machine-extracted · confidence unavailable · Check page ↗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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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