NYC 9/11 Public Portal Document
Post deeming Semiples - Two air samples were collected for asbestos. These samples
were analyzed for PCM, TEM AHERA, and PCMe. The PCM results were all below the
secondary numeric criterion of 0.01 f/cc. The TEM AHERA results indicate that one was
below the detection limit and one was at the detection limit. Both samples were below the
secondary numeric criterion of 0.022 S/cc. The PCMe results indicate that one was below
the detection limit and one was at the detection limit. Both samples were below the
primary clearance criterion of0.0009 S/cc.
Gypsum
Bejore Cleaning Samples - There were no samples collected.
Post P‘ Cleaning Samples - Two air samples were collected. Gypsum was not detected.
Lead
Before deeming Samples - There were no samples collected.
Post P‘ Cleaning Samples - Two air samples were collected for lead. Lead was not
detected in either sample.
Alpha-Quartz
Before Cleaning Samples - There were no samples collected.
Post P* Cleaning Samples - Two air samples were collected after the first cleaning. One
sample exceeded the primary clearance criterion of .004 mg/m’. Alpha-quartz was not
detected in the remaining sample.
Calcite
Before deeming Semiples - There were no samples collected.
Post Cleaning Samples - Two air samples were collected after the first cleaning. Both
samples were below the detection limit.
Cristobalite
Before Cleaning Samples - There were no samples collected.
Post P‘ Cleaning Samples - Two air samples were collected after the first cleaning. Both
samples were below the detection limit.
Tridymite
Before Cleaning Samples - There were no samples collected.
Post f‘ Cleaning Samples - Two air samples were collected after the first cleaning. Both
samples were below the detection limit.
MMVF
Before deeming Samples - There were no samples collected.
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NYC-WTC_000145794
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