OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Industrial Hygiene Air Sample Results SuiTunary for Weeks of 12/21/01 to 12/04/02
Attached is a summary of the results of the samples collected by ATC associates at the World Trade Center site for the specified week.
The vast majority of the samples collected by ATC are “personal samples’’, meaning that the worker wore the sampling device. The vast majority of results have shown exposure levels to be below occupational exposure limits. The exceptions were:
An ozone concentration of 2.38 times the TLV on a torch cutter on the surface east of WTC 5 A sulfuric acid concentration of 1.18 limes the TLV on torch cutter in the WTC 1 depression A quartz concentration of 6.8 times the TLV on a jackhammer operator in the cable pit
Some of the columns in the attached summary may require explanation:
Analyte Class - This column includes general category of the agents (substances) which were sampled.
# of Samples - This indicates how many individual samples were collected for the agent class listed.
# of Analytes - This is the number of individual analysis performed. If only one analyze is determined on each sample, then the number of analytes will equal the number of samples. However, most samples are analyzed for more than one agent as follows:
Metals: Aluminum, antimony, arsenic, barium, beryllium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, selenium, silver, thallium, tin, titanium, vanadium, and zinc. Metal samples are sometimes also analyzed for total particulate.
PAHs: Acenaphthene, acenaphthylene, anthracene, benz(a)anthracene, benz(b)fluoranthene, benzo(a)pyrene, benzo(ghi)perylene, benzo(k)fluoranthene, chrysene, dibenzo(a,h)anthracene, fluoranthene, fluorene, indeno( l,2,3-cd)pyrene, naphthalene, phenanthrene and pyrene.
Aromaties: Benzene, ethyl benzene, toluene, and xylene.
Silica: Respirable dust, quartz, and cristobalite.
Aldehydes: Acetaldehyde, acrolein, benzaldehyde, formaldehyde, n-butyraldehyde, propionaldehyde, and valeraldehyde.
Acids: Hydrobromic acid, hydrochloric acid, hydrofluoric acid, nitric acid, phosphoric acid and sulfuric acid
Highest Analyte - The analyte found in the highest concentration with respect to its occupational exposure limit.
Highest Result - The concentration of the highest analyte.
OSHA PEL - This is the Permissible Exposure Limit (PEL) for the highest analyte. PELs are established by an OSHA rule-making process and are the legal occupational exposure standards.
CITY_21MC100_0 02983629
NYC-WTC_000232914
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NYC-WTC_000186529
Notice regarding elevated occupational exposure levels to quartz, asbestos, and other agents at the World Trade Center site in late 2001.
17 shared non-person entities · 1 shared topics · similarity 0.984
machine-extracted · confidence unavailable · Check page ↗17 shared non-person entities · 1 shared topics · similarity 0.979
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000186468
Summary report of air monitoring results including lead and quartz concentrations for workers at the World Trade Center site.
17 shared non-person entities · 1 shared topics · similarity 0.975
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.967
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.961
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.957
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.956
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.956
machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.954
machine-extracted · confidence unavailable · Check page ↗17 shared non-person entities · 1 shared topics · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗17 shared non-person entities · 1 shared topics · similarity 0.967
machine-extracted · confidence unavailable · Check page ↗13 shared non-person entities · 1 shared topics · similarity 0.966
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
Similarity score 0.994 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000186529
Notice regarding elevated occupational exposure levels to quartz, asbestos, and other agents at the World Trade Center site in late 2001.
Similarity score 0.992 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000186468
Summary report of air monitoring results including lead and quartz concentrations for workers at the World Trade Center site.
Similarity score 0.985 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.978 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.975 (not a probability)
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.
Similarity score 0.974 (not a probability)
machine-extracted · confidence unavailable · Check page ↗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_000186529
Notice regarding elevated occupational exposure levels to quartz, asbestos, and other agents at the World Trade Center site in late 2001.
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