OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document FEB-06-2002 17:24 71S 391 2385 718 391 2385 P.06/06
Summary ofAsbestos Sampling Results Page 3 0/3 Alness: 70 Battery Place Date sampled: November 19, 200J
(cellulose) and fiberglass may be identified in the analysis. The laboratory analyst counts the fibers present to give an estimate of fiber content as a percent. PLM is used for regulatory purposes for dust samples.
Results of Polarized Light Microscopy m /.aa * (PLM) testing of dust at 70 Battery Place, Nov. 19,2001 Area Sampled Outside Outside* Common Residence 1 Residence 2 ■Willi.,- "" —
Sample Numbers SA-O-10 SA-O-X-10’ VA-C-10 VA-Rl-10 VA-R2-10
(Asbestos fibers (%) None None None None None Detected Detected Detected Detected Detected * Denotes a second sample taken in the same location for qpaality control purposes.
Asbestos in dust as determined by TEM analysis: TEM analysis was conducted on all dust samples that showed asbestos content by PLM as less than 1%. TEM analysis is very specific, can detect smaller fibers of asbestos, and is sensitive to less interference. This analysis was done to confirm the PLM findings of no asbestos shown above. However, TEM analysis is not used for regulatory purposes for dust samples.
(A \ V Results of Transmission Electron Microscopy (TEM) testing of dust at 70 Battery Place, Nov 19,2001 tv ft ■ Outside Outside* Common Residence 1 Residence 2 Sample Numbers SA-O-10 SA-O-X-10’ VA-C-10 VA-RMO VA-R2-10 Asbestos fibers (%) None < 1% 1.5 % None Detected None Detected Detected < 1 %*• * Denotes a second sample taken in the same location. ** Denotes re-analysis of original sample for quality control purposes.
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TOTAL P.‘06
CITY_21MC100_00 6638814 NYC-WTC_000220144
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