OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Lead (HVAC) Before Cleaning Samples - One wipe sample was collected. Lead was detected at a concentration above the primary clearance criterion of 25 pg/ft^ with a value of 10700 gg/ft^-
Post P‘ Cleaning Samples - Four air samples were collected. All four samples were below the primary clearance criterion of 1.0 pg/m^. One of these samples was collected from the basement.
HVAC System - Three air samples and two wipe samples were collected after the HVAC system was cleaned. The air sample results indicate that all three air samples were below the detection limit. The two wipe sample results indicated that lead was still present at 25.9 pg/fT and 166 pg/lV. Both of these results were above the primary clearance criterion. Post cleaning lead exceedances were attributed to the composition of the HVAC construction material.
Alpha-Quartz (HVAC) Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P‘ Cleaning Samples - There were no samples collected after the first cleaning.
HVAC System - One air sample was collected. The air sample was below the detection limit.
Calcite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P‘ Cleaning Samples - There were no samples collected after the first cleaning.
HPAC System - One air sample was collected after the HVAC system was cleaned. This sample was below the detection limit.
Cristobalite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P‘ Cleaning Samples - There were no samples collected after the first cleaning.
HVAC System - One air sample was collected after the HVAC system was cleaned. This sample was below the detection limit.
Tridymite Before Cleaning Samples - Pre-cleaning air samples were not collected.
Post P‘ Cleaning Samples - There were no samples collected after the first cleaning.
ffPAC System - One air sample was collected after the HVAC system was cleaned. This sample was below the detection limit.
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CITY_21MC100_011105324
NYC-WTC_000195290
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Similarity score 0.998 (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 0.990 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000145695
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Similarity score 0.971 (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.
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