Summary of air sampling results and occupational exposure findings from the World Trade Center disaster response.
NYC-WTC_000149779–000149796Folder label: “NIOSH”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Mercury: A total of 16 air samples were collected for mercury indicating TWA concentrations from none detected to 0.002 mg/m^. These measurements are all well below the NIOSH recommended ceiling limit and the OSHA ceiling limit of 0.1 mg/m^.
Metals: A total of 45 air samples were collected for 27 different metals including arsenic, beryllium, cadmium, chromium, cobalt, lead, magnesium, manganese, molybdenum, nickel, phosphorus, selenium, silver, tellurium, thallium, vanadium, and zinc. Only trace amounts of these metals were detected on any of the air samples.
Polynuclear Aromatic Hydrocarbons: A total of 12 air samples were collected for 16 different polynuclear aromatic hydrocarbons (PAHs) including anthracene, benzo(a)anthracene, benzo(b)fluoranthene, benzo(a)pyrene, chrysene, phenanthrene, and pyrene. Only trace amounts of PAHs were detected on any the air samples. Four of the PAHs detected on the air samples in trace amounts are the suspected human carcinogens benzo(a)anthracene, benzo(b)fluoranthene, benzo(a)pyrene, and chrysene.
Respirable Particulate: A total of 18 air samples were collected for respirable particulate and indicated TWA concentrations ranging from none detected to 0.32 mg/m^. These measurements are well below the OSHA PEL of 5 mg/m^. (NIOSH does not currently have an REL for respirable particulate.)
Respirable Crystalline Silica: A total of 18 air samples were collected for respirable crystalline silica. No respirable crystalline silica was detected on any of these air samples.
Total Particulate: A total of 36 air samples were collected for total particulate and indicated TWA concentrations ranging from none detected to 2.3 mg/m\ These measurements are well below the OSHA PEL for total particulate of 15 mg/m^. (NIOSH does not currently have an REL for total particulate.)
Volatile Organic Hydrocarbons: A total of 76 air samples were collected for volatile organic hydrocarbons including benzene, ethyl benzene, styrene, toluene, and xylene(s). Except for benzene, only trace amounts of VOCs were detected on any of these air samples. Two of these samples (0.35 and 0.46 mg/m^) 3
NYC-WTC_000149790
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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.
24 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.949
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000149936
Joint OSHA and Bechtel crane inspection report analyzing safety conditions at the World Trade Center site.
23 shared non-person entities · Same agency, volume and box · similarity 0.947
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164171
DEP transmission of NIOSH summary of broad-based air quality monitoring on WTC debris pile.
29 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000164129
DEP transmission of NIOSH industrial hygiene assessment of air quality on WTC debris pile.
28 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000130435
Summary of asbestos air sampling results from October 1, 2001, including PCM and TEM standard comparisons for NYC and NJ locations.
12 shared non-person entities · 1 shared topics · similarity 0.950
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000132628
A letter from Capital Properties submitting additional air quality monitoring results for Broadway and Trinity Place buildings to the DEP.
19 shared non-person entities · similarity 0.948
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000132576
A letter from Capital Properties submitting additional air quality monitoring results for Broadway and Trinity Place buildings to the DEP.
19 shared non-person entities · similarity 0.946
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000132654
A letter from Capital Properties submitting additional air quality monitoring results for Broadway and Trinity Place buildings to the DEP.
19 shared non-person entities · similarity 0.946
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000154496
Memo summarizing daily activities including a debris site visit request on October 30, 2001.
21 shared non-person entities · similarity 0.945
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000132602
Additional air quality monitoring documentation and test results for multiple Broadway commercial locations.
19 shared non-person entities · similarity 0.945
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000105620
A letter from a property management firm submitting additional air quality monitoring results for 111 Broadway and Trinity Place to the DEP.
22 shared non-person entities · similarity 0.944
machine-extracted · confidence unavailable · Check page ↗28 shared non-person entities · similarity 0.944
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Notice instructing staff to preserve World Trade Center documents for potential legal actions.
Filed in the same folder
NYC-WTC_000164171
DEP transmission of NIOSH summary of broad-based air quality monitoring on WTC debris pile.
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NYC-WTC_000164129
DEP transmission of NIOSH industrial hygiene assessment of air quality on WTC debris pile.
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Summary of asbestos air sampling results from October 1, 2001, including PCM and TEM standard comparisons for NYC and NJ locations.
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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.
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