OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Post f Cleaning Samples ~ Two air samples, three micro vacuum samples and four wipe samples were collected after the first cleaning. The two air samples, all three micro vacuum samples, and three of the four wipe samples were below the detection limit. The fourth wipe sample was above detection limit but below the primary clearance criterion. The results from the first cleaning indicate that the cleaning technique was effective in removing the elevated concentrations of lead observed prior to the first cleaning. Because the primary clearance criterion for lead was met after the first cleaning, no additional samples were collected for analysis of lead.
Alpha-Quartz 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. This indicates that the cleaning method used was able to reduce the pre-cleaning concentration of alpha-quartz. Because all of the samples were below the detection limit 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 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 limits 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 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 limits after the first cleaning, no additional samples were collected for analysis of tridymite.
MMVF Before Cleaning Samples - Four pre-cleaning wipe samples were collected. One of the four samples was below the detection limit; MMVF was detected in the other three samples.
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CITY_21MC100_011105270
NYC-WTC_000195236
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Similarity score 0.988 (not a probability)
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Similarity score 0.987 (not a probability)
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