17 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗Document / 28 pages
Asbestos testing correspondence, 153 Chambers Street, Apr 2002
Machine-extracted title · confidence 100%Letter confirming facade asbestos testing and subsequent cleaning at 153 Chambers Street.
NYC-WTC_000106270–000106297Folder label: “153 CHAMBERS STREET; Block: 140 Lot: 8 BIN: 1001503”
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OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Clean Air Testing Lab 'Inc.. 1111 Steele Blvd. Baldwln, New York 11510 1eI.IFew (516)546-2640•
Clean Air Testing Labs conducts analysis of. ulk.samples (e.g. floor tile, plaster, pipe insulation, etc.) 'for asbestos • content by numerous applications under Polarized Light Microscopy. (PLM) and Transmission Election Microscopy •(TEN) 4. Listed below is a highlight of those methods
PLM is the most commonly 'used method for the analysis of bulk samples, using lOX to 400'X power magnification. 'PLM bulk sample analyses follow the EPA .method of the •Determi.ria'tion of Asbestos in Hulk Insulation Sample (EPA 600/M4-82-020.). Samples are first examined with a stereo--binocular microscope. • 'Representative portions of the sample 'are mounted on slides with, refractive index oils'and analyzed.with a Polarized Light Microscope (PLM):. If no asbestos is found 'in a sample, "ND" ('None' Detected) is reported. If asbestos is found in a sample; two-kinds of information are reported iii the "asbestos minerals" column of the PLM report: First, identify the types of .asbestos .found. Second, identify the area percentage of, asbestos,'as determined non- by visual estimation, by PLM. Additional information about materials •also recorded. Many asbestos fibers and non-fibrous' iss
samples consist of distinct materials or .which are 1'ayes,
analyzed separately. Asbestos results from.•each 'layer or material are reported individually..'
asbestos-containing. material or containing If Routine PLM analysis finds the sample to be non asbestos in low concentration the sample can be analyzed by"an alternative method known all friable samples). Point counting can be used to levels,
as point counting (required by NY'SDOH for
by removing, some of the interferences •more accurately determine the amount of asbestos present analyst's ability to determine the amount (i.e. binder, carbonate mineral, etc.) that may hinder the sample. systematically analyzes of-asbestos present. Point counting uses larger quantities of ofview. 'and
individual particles, whereas visual estimation analyzes 'fields.
Project #02-91 Controlled Copy on Grey Paper Page 4 of 9
NYC-WTC 000106275
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NYC-WTC_000106275Source: NYC Law Department, mirrored locally
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13 shared non-person entities · 1 shared topics · similarity 0.960
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Interoffice memo forwarding bulk sample analysis and air monitoring results to the DEP Director.
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11 shared non-person entities · 1 shared topics · similarity 0.959
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machine-extracted · confidence unavailable · Check page ↗Buildings in this record
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- 153 Chambers Street · 27 pages · confidence 0.95 · verify page 1
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