Forwarded EPA draft guidance on screening levels for asbestos, fiberglass, and silica in indoor air and settled dust for departmental review.
NYC-WTC_000160806–000160819Folder label: “E-mails R. Avaltroni 2002”
OCR status: ok · source: pdftotext
z z o o i 1^ co
■D o c o o Contribuition to risk of various asbestos dust levels CT o' CJ> "0 o o 00 Risk = Conc(f/cc) * TWF * Slope factor 03 CJ> TWF is weighting factor for partial exposure (less than 70 years, 24 hrs a day) O Slope factor of 0.23 fZcc used over a 70 year exposure o o c 3 Low Fiber loading 1000 fZcm2 CD 3 Scenario Activity loading K factor Air level Years daysZyear hoursZday TWF Contribution to Risk fZcc 1 Year exposure 1 Daily activi 1000 1.0E-07 1.00E-04 1 350 24 0.013699 3.15E-O7 2 Cleaning 1000 1.0E-06 1.00E-03 1 50 2 0.1WS1163 3.75E-08 3.53E-07
30 Years exposure 1 Daily activi 1000 1.0E-07 1.00E-04 30 350 24 0.410959 9.45E-06 2 Cleaning 1 32 1.0E-06 1.00E-03 30 50 2 0.004892 1.13E-06 1.06E-05
70 Years exposure 1 Daily activi 2 Cleaning 1 1 i 1.0E-07 1.00E-04 1.0E-06 1.00E-03 70 70 350 50 24 0.958904 2 0.011416 2.21E-05 2.63E-O6 2.47E-05
Moderate Fiber loading, 10,000f/cm2 Scenario Activity loading K factor Air level Years days/year hours/day TWF Contribution to Risk f/cc 1 Year exposure 1 Daily activi 1 1.0E-07 1.00E-03 1 350 24 0.013699 3.15E-06 2 Cleaning 1 1.0E-06 1.00E-02 1 50 2 0.15521163 3.75E-07 3.53E-06
30 Years exposure 1 Daily activi E552 1.0E-07 1.00E-03 30 350 24 0.410959 9.45E-05 2 Cleaning 10000 1.0E-06 1.00E-02 30 50 2 0.004892 1.13E-05 1.06E-04
70 Years exposure 1 Daily activi 1 5552 1.0E-07 1.00E-03 70 350 24 0.958904 2.21 E-04
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Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000159817
Circulation of draft environmental screening benchmarks for asbestos, fiberglass, and silica in indoor air and settled dust for expert review.
7 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.997
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160788
DEP discussion of drafting water use exemption notice for contractors performing necessary WTC hazard remediation and facade cleanup work.
6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162015
Forwarded daily environmental summaries from EPA staff to city officials regarding early World Trade Center recovery operations.
5 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000160683
Transmission of WTC-related Q and A document to interagency task force with EPA Regional contact information.
5 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162025
Report on asbestos air sampling at five locations borough-wide, showing levels below residential reoccupancy threshold except at Manhattan site requiring further fiber analysis.
3 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.970
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · similarity 0.976
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · similarity 0.975
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · similarity 0.974
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000141536
Request outlining DEP procurement and EPA supervision of cleaning and sampling contracts for Lower Manhattan residents.
6 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000108786
A document listing seven licensed contractors authorized to perform clean-up and abatement work at the World Trade Center site.
8 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164489
Discussion regarding asbestos sampling results in an apartment and potential release of a draft document.
4 shared non-person entities · 1 shared topics · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000141555
Document requesting FEMA mission assignment for indoor air testing and cleaning programs in Lower Manhattan.
5 shared non-person entities · 1 shared topics · similarity 0.970
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
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 0.998 (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 0.996 (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 0.995 (not a probability)
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.
Similarity score 0.981 (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 0.939 (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 0.935 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.
NYC-WTC_000160529
Notice instructing staff to preserve original World Trade Center documents as potential legal evidence and not dispose of them.
Filed in the same folder
NYC-WTC_000160530
DEP memo documenting inconsistent dust control from WTC debris transport trucks affecting school reopening plans.
Filed in the same folder
NYC-WTC_000160536
DEP memo discussing WTC recovery contractor operations, fuel requirements, infrastructure repairs, and school proximity.
Filed in the same folder
NYC-WTC_000160537
Forwarded draft press release from NYC Department of Health regarding WTC environmental and health guidance.
Filed in the same folder
Distribution of the final version of a Department of Health press release concerning WTC indoor air quality.
Filed in the same folder