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Chain of custody form for DEP environmental samples, 2001

Machine-extracted title · confidence 90%

Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.

NYC-WTC_000145695–000145868

Folder label: “NO INFO

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Scanned page image, NYC-WTC_000145798
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NYC 9/11 Public Portal Document

Six were below the detection limit.

Post P‘ Cleaning Samples (Tsst 4D) - Two air samples were collected, both with results below the 0.051 pg/m^ detection limit as well as the primary clearance criterion of 1.0

Post Cleaning Samples (Test 4E) - Three wipe samples were collected. The glass jars containing two of the samples were broken at the laboratory; however, the laboratory was able to analyze these samples. The samples were below the primary clearance criterion of 25 P-g/ft^. The third sample exceeded the primary clearance criterion at a concentration of 38.2 pg/ft^. Re-cleaning and testing at this location was not performed since this sample was collected on a window sill which was later painted by the property owner.

Alpha-Quartz Before Cleaning Samples - Pre-cleaning air samples were not collected.

Post P‘ Cleaning Samples (Test 4A) - There were two air samples collected after the first cleaning. Both air samples were below the detection limit.

Post P‘ Cleaning Samples (Test 4B) - Two air samples were collected. Both samples were below the detection limit.

Post Cleaning Samples (T2st 4C) - Two air samples were collected. Both were below the detection limit.

Calcite Before Cleaning Samples - Pre-ciezinng air samples were not collected.

Post P‘ Cleaning Samples (Test 4A} - Two air samples were collected. Both air samples were below the detection limit.

Post P‘ Cleaning Samples (Test 4B) - Two air samples were collected. Both samples were below the detection limit.

Post Cleaning Samples (Test 4C) - Two air samples were collected. Both were below the detection limit.

Cristobalite Before Cleaning Samples - Pre-cleaning air samples were not collected.

Post f‘ Cleaning Samples (Test 4A) - Two air samples were collected after the first cleaning. Both air samples were below the detection limit.

Post P‘ Cleaning Samples (Test 4B) - Two air samples were collected. Both samples were below the detection limit.

Post P‘ Cleaning Samples (Test 4C) - Two air samples were collected. Both were below

100

NYC-WTC_000145798

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NYC-WTC_000145798Source: NYC Law Department, mirrored locally

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