Correspondence discussing draft EPA screening levels for asbestos and silica in indoor air and settled dust during post-WTC response.
NYC-WTC_000164455–000164461
OCR status: ok · source: pdftotext
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■D o c o Contribuition to risk of various asbestos dust levels CT o o' CJ> "0 Risk = Conc(f/cc) * TWF * Slope factor o cn 03 00 TWF is weighting factor for partial exposure (less than 70 years, 24 hrs a day) O Slope factor of 0.23 f/cc used over a 70 year exposure o o c 3 Low Fiber loading 1000 f/cm2 CD 3 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 SHE 1.0E-07 1.00E-04 1 350 24 0.013699 3.15E-07 2 Cleaning 1000 1.0E-06 1.00E-03 1 50 2 0. SHE1163 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 1000 1.0E-06 1.00E-03 30 50 2 0.004892 1.13E-06 1.06E-05
70 Years exposure 1 Daily activi 1 SHE 1.0E-07 1.00E-04 70 350 24 0.958904 2.21 E-05 2 Cleaning 1000 1.0E-06 1.00E-03 70 50 2 0.011416 2.63E-06 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 10000 1.0E-07 1.00E-03 1 350 24 0.013699 3.15E-06 2 Cleaning 1n 1.0E-06 1.00E-02 1 50 2 0.000163 3.75E-07 3.53E-06
30 Years exposure 1 Daily activi 10000 1.0E-07 1.00E-03 30 350 24 0.410959 9.45E-05 2 Cleaning 1 SEEE 1.0E-06 1.00E-02 30 50 2 0.004892 1.13E-05 1.06E-04
70 Years exposure 1 Daily activi 10000 1.0E-07 1.00E-03 70 350 24 0.958904 2.21 E-04
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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.
5 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.981
machine-extracted · confidence unavailable · Check page ↗4 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163599
Draft screening levels for asbestos, fiberglass and silica in indoor air and settled dust.
4 shared non-person entities · 1 shared topics · similarity 0.992
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139634
DEP memo forwarding EPA draft screening level calculations for asbestos, fiberglass, and silica in indoor air and settled dust for review.
5 shared non-person entities · 1 shared topics · similarity 0.980
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154652
Internal tracking document for managing reports, comments, and actions related to environmental compliance cases.
3 shared non-person entities · 1 shared topics · similarity 0.952
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.
3 shared non-person entities · 1 shared topics · similarity 0.952
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140259
Memorandum detailing procedures for asbestos wipe sampling in Lower Manhattan and estimating associated cancer risks from dust exposure.
3 shared non-person entities · 1 shared topics · similarity 0.951
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151635
EPA memorandum detailing plans for asbestos wipe sampling, projecting airborne dust levels, and estimating increased cancer risks from WTC dust exposure.
3 shared non-person entities · 1 shared topics · similarity 0.951
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162222
EPA staff distributed an environmental laboratory report to federal and city agencies on May 15, 2002.
4 shared non-person entities · 1 shared topics · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140138
EPA memorandum addressing World Trade Center asbestos contamination status and agency efforts to provide information on the situation.
3 shared non-person entities · 1 shared topics · similarity 0.947
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140083
Forwarded EPA memorandum dated June 9, 2002, concerning the Asbestos Reservoir and carpet testing methods.
3 shared non-person entities · 1 shared topics · similarity 0.945
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140040
Technical memorandum from EPA discussing ultrasonication testing for asbestos in carpets and HEPA vacuuming effectiveness.
3 shared non-person entities · 1 shared topics · similarity 0.944
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
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