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
** Methodology based on EPA Region III assessment of wipe sample data
*PAHs (indoor air)
Tier Screening Value Basis Action I >6 ug/m3 Risk-based screening level for Aggressive cleaning - if residential setting levels persist, take additional (E-04 x lyr) action to reduce exposure II .2 ug/m3 (or background) - .2 ug/m3 - risk based Maintain recommended 6 ug/m3 screening level for residential (diligent wet/HEPA) setting cleaning methods -consider (E-04 x 30 yr) additional monitoring III <.2 ug/m3 (or background) Determination of local No further action background
NYC-WTC 000160886
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17 shared non-person entities · 1 shared topics · similarity 0.968
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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
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10 shared non-person entities · 1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164877
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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_000140821
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Similarity score 0.999 (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 0.974 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
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Similarity score 0.968 (not a probability)
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.
Similarity score 0.968 (not a probability)
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