OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Dioxin
Tier Action Dioxin (settled dust) Dioxin (indoor air) Screening Basis Screening Basis Value Value I Aggressive cleaning. >70 ng/m2 Risk-based >0.03 ng/m3 Risk-based If levels persist, take screening level screening level additional action to for residential for residential reduce exposure. setting (E-04 x 1 setting (E-04 x yr) 1 yr) 11 Maintain 2 ng/m2 (or 2 ng/m2 is risk 0.001 ng/m3 (or 0.001 ng/m3 is recommended background) based screening background)to Risk- based cleaning methods. to 70 ng/m2 level for 0.03 ng/m3 screening level Consider additional residential setting for residential monitoring (E-04 X 30 yr) setting (E-04 x 30 yr) III No further action <2 ng/m2 (or Determination of <0.001 ng/m3 Determination background) local background (or background) of local background
The inputs to the dose equations were based on the exposure assumptions that NYSDOH used in assessing office buildings in Binghamton, NY, and the proposed cancer slope factor for dioxin. In addition, the Tier I and III benchmarks equate to a lifetime exposure level which is approximately 1/10 of that which results from current dietary intake of dioxin (65 pg/d). It is thus reasonable to assume that any lower level of exposure would result in an inconsequential reduction in the current risk levels experienced by the general U.S. population.
NYC background would also be an important consideration in determining the appropriate longer-term value. Propose selecting the longer-term value on the basis of a 10-4 risk level or NYC background, whichever is higher.
NYC-WTC_000164848
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_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.
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_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.
Cited alongside this record in an Ask answer
Document defining indoor air quality terms such as acid aerosols and action levels for radon remediation.
Cited alongside this record in an Ask answer
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