OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Alpha-Quartz Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P' Cleaning Samples - Two air samples were collected after the first cleaning. The two air samples were below the detection limit. Because the samples were below the detection limits after the first cleaning, no additional samples were collected for analysis of alpha-quartz.
Calcite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P' Cleaning Samples - Two air samples were collected after the first cleaning. All of the samples were below the detection limit. Because all of the samples were below the detection limit after the first cleaning, no additional samples were collected for analysis of calcite.
Cristobalite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post l^ Cleaning Samples - Two air samples were collected after the first cleaning. All of the samples were below the detection limit. Because all of the samples were below the detection limit after the first cleaning, no additional samples were collected for analysis of cristobalite.
Tridymite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post Cleaning Samples - Two air samples were collected after the first cleaning. All of the samples were below the detection limit. Because all of the samples were below the detection limit after the first cleaning, no additional samples were collected for analysis of tridymite.
MMVF Before Cleaning Samples - Two pre-cleaning air samples and three pre-cleaning wipe samples were collected. One of the two air samples was above the primary clearance criterion of 10 S/L and the other air sample was above the detection limit. The results for all three of the wipe samples indicate that MMVF was above the detection limit. This indicates that MMVF was present in the unit prior to cleaning.
Post P‘ Cleaning Samples - Three air samples and five wipe samples were collected after the first cleaning. The results for the three air samples indicate that MMVF was present, however, all three were below the primary clearance criterion of 10 S/L. The results of the five wipe samples indicate that three of the five samples were below the detection limit and the remaining two samples were at the detection limit. Although MMVF was still present after the first cleaning, the concentrations detected were much lower than the pre cleaning samples. There is not a clearance criterion for MMVF in settled dust. Because the air samples were below the primary clearance criterion and the MMVF in settled dust
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CITY_21MC100_011105280
NYC-WTC_000195246
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NYC-WTC_000145695
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Similarity score 1.000 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
Similarity score 0.993 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.
Similarity score 0.991 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
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