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TEM Asbestos air sample results, WC BOE, Nov 2001

Machine-extracted title · confidence 95%

Laboratory report documenting transmission electron microscopy analysis of an air sample collected at WC BOE on November 14, 2001.

NYC-WTC_000185337
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Scanned page image, NYC-WTC_000185337
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OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1928 Lab Group #: 5888 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/14/01

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 4 EDS i No (Nonadb j F B C M >=05 (J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) |

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria ooserved least 20 unfolded or ovedapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES — Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ' Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite i NSD = No Structures Defected

CITY_21MC100_003106400

NYC-WTC_000185337

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NYC-WTC_000185337Source: NYC Law Department, mirrored locally

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