Forwarded EPA memorandum dated June 9, 2002, concerning the Asbestos Reservoir and carpet testing methods.
NYC-WTC_000140083–000140124Folder label: “EPA Cate Jenkins”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Table 3. ATSDR AIR LEVEL FINDINGS COMPARED TO LEVEL CHOSEN BY REGION 1
Background ambient air levels are from studies determined to be the most credible by the ATSDR®*
Concentration in TEM Equivalent concentration in structures per milliliter PCM fibers per milliliter (s/mL). This includes all (PCM f/mL). PCM fibers asbestos fibers and are only those single fibers bundles of fibers, and so which are longer than 5 is higher than “PCM” micrometers with a certain fibers. aspect ratio.
expressed as expressed as exponential exponential
ATSDR finding: outside air, rural, no 0.00001 (1 X 10’®) 0.0000002 (2x 10-’) known source of asbestos contamination nearby
ATSDR finding: outside air, urban, no 0.0001 (1 X 10^) 0.000002 (2x 10-®) know source of asbestos contamination nearby
ATSDR finding: 1988 EPA survey of 94 0.006 (6x 10-®) 0.0001 (1 X 10"*) public buildings containing asbestos materials, mean concentration
ATSDR finding: 1988 EPA survey of 41 0.03 (3x 10'2) 0.005 (5x 10-*) schools containing asbestos materials, mean concentration
AHERA TEM clearance test level, the “70 0.02 (2x 10^) 0.01 (1 X 10®) structures per square centimeter” level, approximately converted to s/mL and PCM equivalent f/mL. This is an unsafe level for long term exposures.’®
Region 1 level for background outside air, 0.045 (4.5 X 10’2) unknown used for risk assessment
Region 1 failed to use real-world background dust levels
There was no reason for Region 1 to have gone through any calculation process to project background dust levels from air levels. Typical background dust levels are well established, just like typical air levels.
Region 1 chose to ignore the fact that the same reference’® they used for K-factors also contained real world data for typical dust levels, which are widely recognized by industrial hygienists and other asbestos abatement specialists. See Table 2 for typical dust levels for buildings with or without asbestos contamination problems. Compare 200 s/cm^, a real world background level for buildings that do not contain asbestos materials, with Region I's calculated level of45,000 s/cm^.
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NYC-WTC_000140099
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NYC-WTC_000140040
Technical memorandum from EPA discussing ultrasonication testing for asbestos in carpets and HEPA vacuuming effectiveness.
31 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 1.000
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.
27 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.994
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.
18 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.988
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.
16 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140235
Memorandum comparing asbestos data in Manhattan to other sites and arguing for cleanup under the Superfund statute.
13 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.979
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000140127
Technical memorandum from EPA discussing ultrasonication testing for asbestos in carpets and HEPA vacuuming effectiveness.
10 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.978
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.
16 shared non-person entities · 1 shared topics · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154652
Internal tracking document for managing reports, comments, and actions related to environmental compliance cases.
16 shared non-person entities · 1 shared topics · similarity 0.984
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000125845
Draft fact sheet from DOH and DEP addressing tenant concerns regarding asbestos fibers at 105 Duane Street.
17 shared non-person entities · 1 shared topics · similarity 0.969
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000094469
Letter from Enviroscience Consultants providing air and bulk sampling results for 86 Trinity Place.
6 shared non-person entities · similarity 0.959
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000161674
Document excerpt listing counsel and staff members assigned to a paper on infrastructure related to World Trade Center recovery.
13 shared non-person entities · 1 shared topics · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154976
Correspondence criticizing the EPA and DEP regarding asbestos, silica levels, and safety clearance after cleaning at 114 Liberty Street.
12 shared non-person entities · 1 shared topics · similarity 0.956
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NYC-WTC_000140036
Administrative notice requiring preservation of World Trade Center-related documents as evidence for potential future legal actions against the City.
Filed in the same folder
NYC-WTC_000140038
Forwarded EPA memorandum dated June 9, 2002, concerning the Asbestos Reservoir and carpet testing methods.
Filed in the same folder
NYC-WTC_000140040
Technical memorandum from EPA discussing ultrasonication testing for asbestos in carpets and HEPA vacuuming effectiveness.
Filed in the same folder
NYC-WTC_000140080
Forwarded EPA memorandum dated June 9, 2002, concerning the Asbestos Reservoir and carpet testing methods.
Filed in the same folder
NYC-WTC_000140082
Reference chart comparing asbestos air concentration standards, detection limits, and lifetime cancer risk levels for fibers per milliliter PCM equivalents.
Filed in the same folder