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TEM Asbestos air sample results, NYC BOE, Dec 2001

Machine-extracted title · confidence 95%

Technical report presenting transmission electron microscopy data for an air sample analyzed from a New York City Board of Education facility.

NYC-WTC_000184442
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Scanned page image, NYC-WTC_000184442
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OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NY’C BOE Volume (liters): 1960 Lab Group #: 6199 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 21 GridOpening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV ft Grid Openings: 4 Analysis Date: 12,'2 7/01

Analysis Performed By. MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nor EDS (Nonadb Nc F B C M >=05 u >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5pi Elements)

Srruc = > 0,5p > 5:1 Aspect Ratio Grid acceptance:

\= Fositive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped grid squares <5% F B i C S M >6p /= EDS spectrum contorming to laboratory holes or opaque areas Identification criteria observed Chrysotile ' amphiboles , Amphibole F : Single Fiber Amosite E = Sundie (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix ! Non-Identified Actinolite I MSD = Mo Structures Detected ......

CITy_21MC100_003105119

NYC-WTC_000184442

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NYC-WTC_000184442Source: NYC Law Department, mirrored locally

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