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TEM Asbestos air sample results, NYC BOE, Mar 2002

Machine-extracted title · confidence 95%

Laboratory report documenting TEM analysis of an air sample collected from a NYC Board of Education site on March 7, 2002.

NYC-WTC_000185838
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Scanned page image, NYC-WTC_000185838
OCR text

OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

TEM Asbestos fair! Count Sheet Client Name: . NYC BOE Volume (liters): 1840 Lab Group #: 6974 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496

GRID BOX: Magnification: 20.,000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/7/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorW EDS No (Nonadb F B C M >=05(1 :>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

J

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u 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 NSD = No Structures Detected

CITY_21MC100_003108547

NYC-WTC_000185838

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NYC-WTC_000185838Source: NYC Law Department, mirrored locally

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