EPA notice of chain-of-custody and benchmarks presentation for WTC Taskforce meeting on April 8, 2002.
NYC-WTC_000160878–000160893Folder label: “E-mails R. Avaltroni 2002”
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 flcc * samples, fibrous glass dust levels individuals, but are above the 0.001 and loading. f/cc, 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 1X10 risk estimate for a 30 10,000 f/cm2 conducted to determine if fiber year exposure. Air concentrations To levels are elevated. estimated for different activities using 100,000 f/cm2 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 (10,000flcm2 corresponds to a 1x10-4 risk for a 30 year exposure)
NYC-WTC 000160891
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NYC-WTC_000164862
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18 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
15 shared non-person entities · 1 shared topics · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗16 shared non-person entities · 1 shared topics · similarity 0.974
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.
16 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗17 shared non-person entities · 1 shared topics · similarity 0.969
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.
17 shared non-person entities · 1 shared topics · similarity 0.968
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.
3 shared non-person entities · 1 shared topics · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145869
Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
17 shared non-person entities · 1 shared topics · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000176140
Appendix document outlining health protective screening values and contaminants of concern for WTC site workers and Lower Manhattan residents.
11 shared non-person entities · 1 shared topics · similarity 0.957
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.
4 shared non-person entities · 1 shared topics · similarity 0.957
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000186132
Draft document outlining health effects screening criteria for ambient air developed by EPA Region 2 in October 2002.
10 shared non-person entities · 1 shared topics · similarity 0.954
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.
5 shared non-person entities · 1 shared topics · similarity 0.953
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000140825
Criteria for determining necessary actions when asbestos levels exceed background, including resampling and ongoing cleaning protocols.
Similarity score 0.997 (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 0.996 (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 0.996 (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 0.995 (not a probability)
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.
Similarity score 0.986 (not a probability)
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.
Similarity score 0.971 (not a probability)
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