OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
chemical on the surface is negligible, and that the chemical is available on the surface for the entire exposure duration (that is, that the chemical on a surface is not carried away each time the surface is touched). It is assumed that there is a maximum amount of chemical that can be deposited on skin (a maximum Ds) in a single day, but that maximum Ds is unknown. Therefore, this method tends to be conservatively biased with respect to oral and dermal exposure. If inhalation exposure is to be considered, the volatilized amount should be subtracted before estimating the amount available for dermal transfer.
Although these equations are limited by the above assumptions, they are basically sound in theory. The difficulty is in defining the specific inputs to the equations, since some of the input parameters have very little or no experimentally determined values in literature. Assessments usually rely on professional judgment.
The daily dose (Do and Dd above) is converted to a probability of carcinogenic risk by multiplying it by a carcinogenic slope factor (CSF). The CSF is a chemical-specific value indicating the risk per intake dose of that chemical.
9
The screening values developed for each potential indicator chemical are shown in five tables. Following each table is a summary of any contaminant-specific assumptions that were made in developing benchmark values.
NYC-WTC_000164845
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NYC-WTC_000164862
Document introduction describing a cross-agency group tasked with identifying contaminants and establishing health-based screening levels.
16 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.969
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.
4 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.959
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164732
Draft spreadsheet of asbestos sampling results from residential locations collected November-December 2001, circulated for review.
17 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164784
Transmission of revised asbestos sampling results for residential samples collected November-December 2001.
17 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.957
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.
30 shared non-person entities · 1 shared topics · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000148952
Table listing volatile organic compound (VOC) sampling sites and dates outside of Ground Zero from September 2001 to January 2002.
27 shared non-person entities · 1 shared topics · similarity 0.977
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145869
Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
30 shared non-person entities · 1 shared topics · similarity 0.975
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000151128
Report establishing health-based screening levels for the indoor environment with cross-agency representation.
13 shared non-person entities · 1 shared topics · similarity 0.969
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.
21 shared non-person entities · 1 shared topics · similarity 0.963
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154652
Internal tracking document for managing reports, comments, and actions related to environmental compliance cases.
11 shared non-person entities · 1 shared topics · similarity 0.961
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139712
Series of emails forwarding a draft memo between DEP staff members for review and finalization.
17 shared non-person entities · 1 shared topics · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139656
Forwarded spreadsheet compiling residential asbestos sampling results collected in November-December 2001, including Building 11 reoccupancy assessment.
16 shared non-person entities · 1 shared topics · similarity 0.958
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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NYC-WTC_000148952
Table listing volatile organic compound (VOC) sampling sites and dates outside of Ground Zero from September 2001 to January 2002.
Cited alongside this record in an Ask answer
A letter from Capital Properties submitting additional air quality monitoring results for Broadway and Trinity Place buildings to the DEP.
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Document defining indoor air quality terms such as acid aerosols and action levels for radon remediation.
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NYC-WTC_000145869
Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
Cited alongside this record in an Ask answer
NYC-WTC_000150408
Memorandum regarding the FBI releasing vehicles from Ground Zero to Fresh Kills Landfill for investigation purposes.
Cited alongside this record in an Ask answer