Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
NYC-WTC_000145510–000145686Folder label: “NO INFO”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Appendix D
Screening Levels Used by EPA to Assess Outdoor Air Quality
Screenirrg Level Source
Asbestos 70s/m2 AHERA clearance level to re-enter school after asbestos (Ambient Air) abatement. Represents minimum detection limit of method in use at time standard set. Asbestos 1 % asbestos The Asbestos NESHAP (40 CFR Part 61) level at which a material (Bulk Dust) is considered asbestos-containing and subject to NESHAP removal regulations. Benzene 0.02 ppm [1] Califomia-EPA toxicity studies. .21 ppm [3] Region 2 [2] PCBs .73ug/m3 [1] Region 2 [2] 9ug/m3 [3] Region 2 [2] Chromium .6ug/m3 [3] Region 2 [2]. Based on risk for Chromium Hexavalent (the most toxic form of Chromium). Cadmium .2 ug/m3 [1] Califomia-EPA toxicity studies 3 ug/m3 [3] Region 2 (2] Manganese .5 ug/m3 [1] Region 2 [2] 40 ug/m3 Air Quality Index. Represents caution level for sensitive Particulate populations for 24-hour average exposure. Matter 2.5 65 ug/m3 National Ambient Air Quality Standard (24 hr avg) Particulate 150 ug/m3 Air Quality Index and National Ambient Air Quality Standard Matter 10 Lead 1.5 ug/m3 National Ambient Air Quality Standard (3 mo avg) .1 ug/m3 Default value in EPA’s Integrated Exposure Uptake/ Bio-kinetic Model for Lead in Children. PAHs 6ug/m3 [3] Region 2 developed from EPA’s “Hazard Evaluation Handbook: A Guide to Removal Actions,” and EPA National Center for Environmental Assessment provisional inhalation Slope Factor for Benzo(a)pyrene. Dioxin .162ng/m3 [3] Region 2 [2] Sulfur Dioxide .14 ppm National Ambient Air Quality Standard (24 hr avg) Acetone 1.5 ppm [1] Region 2 [2] Benzaldehyde 860 ppm Not identified 1,3 Butadiene .01 ppm [1] [3] Region 2 developed using EPA’s “Hazard Evaluation Handbook: A Guide to Removal Actions,” and proposed reference concentration.
79 Report No. 2003-P-00012
NYC-WTC_000145599
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000145345
Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
79 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 1.000
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000146108
Draft excerpt describing the FEMA-funded residential testing and cleaning program administered by EPA and New York City following the attacks.
22 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.982
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000144741
Standard administrative notice requiring the retention of original World Trade Center records as evidence for future legal actions.
35 shared non-person entities · Same agency, volume and box · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗29 shared non-person entities · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗29 shared non-person entities · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000153058
Forwarding of draft EPA OIG report excerpts for legal and technical review before August deadline.
29 shared non-person entities · similarity 0.985
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000153497
Draft excerpts from an EPA Office of Inspector General report reviewing the World Trade Center indoor environmental response.
30 shared non-person entities · similarity 0.985
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000161636
Agenda listing panelists from federal agencies, unions, and city departments for a March 2004 conference on post-9/11 air quality.
30 shared non-person entities · 1 shared topics · similarity 0.984
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000195741
Billing document from a contractor for air sampling services provided in the Manhattan area during December 2002.
18 shared non-person entities · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000153096
Interagency memo circulating EPA revisions for NESHAP and related programs with request for legal and agency comments.
22 shared non-person entities · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000143952
Joint announcement of a comprehensive plan by the EPA and city partners to address indoor air quality concerns in residential units south of Canal Street.
27 shared non-person entities · 1 shared topics · similarity 0.980
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163200
City law department correspondence coordinating response to EPA with proposed changes to respirator requirements and related policies.
22 shared non-person entities · similarity 0.980
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000145345
Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
Similarity score 0.999 (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 0.954 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000159817
Circulation of draft environmental screening benchmarks for asbestos, fiberglass, and silica in indoor air and settled dust for expert review.
Similarity score 0.954 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160806
Forwarded EPA draft guidance on screening levels for asbestos, fiberglass, and silica in indoor air and settled dust for departmental review.
Similarity score 0.953 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163599
Draft screening levels for asbestos, fiberglass and silica in indoor air and settled dust.
Similarity score 0.953 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140083
Forwarded EPA memorandum dated June 9, 2002, concerning the Asbestos Reservoir and carpet testing methods.
Similarity score 0.952 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Machine-extracted building matches; verify each source. Buildings, never households.
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NYC-WTC_000145345
Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
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Operational period plan from the FDNY detailing actions for December 21, 2001 at the World Trade Center site.
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Operational period plan from the FDNY detailing actions for December 21, 2001 at the World Trade Center site.
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Memo summarizing information from the December 21, 2001 World Trade Center command meeting.
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NYC-WTC_000146129
Correspondence from NYC Corporation Counsel providing comments on excerpts of a draft EPA evaluation report regarding the WTC response.
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