Forwarded EPA draft guidance on screening levels for asbestos, fiberglass, and silica in indoor air and settled dust for departmental review.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
OCR can misread numbers and units. Confirm readings against the page image before using them.
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 ↗6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.976
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.975
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.974
machine-extracted · confidence unavailable · Check page ↗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 ↗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.
Page similarity is temporarily unavailable or this page has no indexed vector.
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
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