Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.
NYC-WTC_000145345–000145509Folder 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
Pollutant Source Asbestos 70 s/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] 9 ug/m3 [3] Region 2 [2] Chromium .6 ug/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_000145434
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000145510
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.
33 shared non-person entities · Same agency, volume and box · similarity 0.982
machine-extracted · confidence unavailable · Check page ↗28 shared non-person entities · similarity 0.987
machine-extracted · confidence unavailable · Check page ↗28 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.
28 shared non-person entities · similarity 0.986
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.
28 shared non-person entities · similarity 0.986
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.
29 shared non-person entities · 1 shared topics · similarity 0.985
machine-extracted · confidence unavailable · Check page ↗17 shared non-person entities · similarity 0.982
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_000163200
City law department correspondence coordinating response to EPA with proposed changes to respirator requirements and related policies.
22 shared non-person entities · similarity 0.981
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.
26 shared non-person entities · 1 shared topics · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000145510
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_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 ↗NYC-WTC_000140040
Technical memorandum from EPA discussing ultrasonication testing for asbestos in carpets and HEPA vacuuming effectiveness.
Similarity score 0.951 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140170
EPA memorandum on wipe sampling methods for asbestos in Lower Manhattan buildings, resuspension projections, and cancer risk estimates from WTC dust exposure.
Similarity score 0.951 (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 0.950 (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 0.950 (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_000145510
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.
Cited alongside this record in an Ask answer
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.
Cited alongside this record in an Ask answer