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TEM Asbestos air sample results, NYC BOE, Feb 2002

Machine-extracted title · confidence 95%

Laboratory data sheet recording transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site.

NYC-WTC_000183830
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Scanned page image, NYC-WTC_000183830
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OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: m'C BOE Volume (liters): 1S16 Lab Group #: 6749 Filter Tvpe ' Filter Area: .MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample 15 Area Examined: u. 04496 mm- GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/20/02

Analysis Performed By: mark peysakhov

GO. Structure. Structure Type Length ID of structure N or EDS No >=05 u Nonasb (Nonadb F B C i M Chrys Amphibole Ambig/ND No Coord <5p Elements) Z

. G3 Y~Z

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: v/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboiatoty identification criteria observed <10% parSculaiB coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C t M j >5u EDS soectrum conforming to laboratoiy hoies dr opaque areas identiilcation criteria obserx'ed Chry'sotile .amphiboles Ampliibole i F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diamete." apart Crocidolite , Ambiguous j C = Cluster {>3 Intersections) Anthophyllite I Non-Asbestos Tremolite M = Matrix I Non-Identified i Actinolite NSC = No Structures Detected

CITY_21MC100_003103345

NYC-WTC_000183830

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NYC-WTC_000183830Source: NYC Law Department, mirrored locally

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