Guidance document defining actions for elevated asbestos fiber levels in air and settled dust based on NYC background concentrations.
NYC-WTC_000140652Folder label: “M.G: EPA INDOOR AIR WORKING GROUP MTGS.”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Air level: Evaluate conditions in the For those areas where air NYC area including levels would not warrant background representativeness cf air removal of sensitive - 0.01 f/cc * samples, fibrous glass dust individuals, but are above the levels and loading. 0.001 f/cc, continued Or cleaning and evaluation is prudent. Settled Dust If air samples were not level: taken, then appropriate air Settled dust threshold is to sampling should be protect to at least a IXIO"^ 10,000 f/cm2 conducted to determine if risk estimate for a 30 year To fiber levels are elevated. exposure. Air concentrations 100, fZcm estimated for different 2 Take actions to reduce activities using a K factors exposures. based on Millette's work on - clean area asbestos. Risk estimate is - resample based on estimates of air - ongoing cleaning levels, and duration of exposure for different activities. (10, 7cm2 corresponds to a 1x10-4 risk for a 30 year exposure)
NYC-WTC_000140652
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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 0.982
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 0.963
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 0.917
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 0.941
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 0.941
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 0.935
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 ↗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 0.924
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 0.923
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · similarity 0.919
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162253
EPA proposal for asbestos clearance criteria applied to WTC indoor cleanup operations.
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 0.915
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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