NYC Law Department release
Independent mirror · updated as the City releases more · v1.2.6
← Document results/DEP Box 08/NO INFO
Document / 174 pages

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

Page image
Scanned page image, NYC-WTC_000145770
OCR text

OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

Lead Before Cleaning Samples - Seven micro vacuum samples and three wipe samples were coUected. Lead was detected in one of the seven micro vacuum samples at concentrations below the comparison value of 25 pg/ft^. All three wipe samples had detectable concentrations of lead, two of which were above the primary clearance criterion of 25

Post P‘ deeming Scanpies - Two air samples, seven micro vacuum samples and four wipe samples were collected after the first cleaning. The two air samples were below the primary clearance criterion of 1.0 pg/m’. All seven micro vacuum samples were below the comparison value. Two of the four wipe samples exceeded the primary clearance criterion, therefore, additional cleaning was necessary.

Post 2nei deeming Scanpling - Three wipe samples were collected following the second cleaning. The results of all three samples were below the primary clearance criterion. In two of the samples, lead was not detected. The sampling results following the second cleaning indicate that the primary clearance criterion was met.

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

Post P* deeming Semtples - Two air samples were collected after the first cleaning. All of the samples were below the detection limit.

Calcite Before deeming Samples - Pre-cleaning air samples were not collected.

Post J" deeming Samples - Two air samples were collected after the first cleaning. All of the samples were below the detection limit.

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

Post P‘ Cleaning Seanples - Two air samples were collected after the first cleaning. AU of the samples were below the detection limit.

Tridymite Before deeming 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.

MMVF Before deeming Samples - Three pre-cleaning wipe samples were collected. MMVF was detected in all three of the samples.

72

NYC-WTC_000145770

OCR can misread numbers and units. Confirm readings against the page image before using them.

NYC-WTC_000145770Source: NYC Law Department, mirrored locally

Related records

Browse subjects →

Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.

Same-box records

Filed elsewhere

More like this page

Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.

Page similarity is temporarily unavailable or this page has no indexed vector.

Buildings in this record

Machine-extracted building matches; verify each source. Buildings, never households.

Others also read

Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.

NYC-WTC_000136990

Archival folder label for September 11 news clippings from the Office of the Mayor, identified as Folder 0123.

Cited alongside this record in an Ask answer

NYC-WTC_000153313 · Box DEP Box 26

Updated memorandum defining the Red Zone boundaries and listing authorized agencies for entry into the restricted area.

Cited alongside this record in an Ask answer

NYC-WTC_000149744 · Box DEP Box 10

Policy document outlining NYPD access requirements for building owners and contractors at the site in October 2001.

Cited alongside this record in an Ask answer

Compare copies and versions →