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TEM asbestos air count sheet, PS 89M, Jan 12 2002

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Laboratory data sheet recording TEM analysis of air samples for asbestos fibers at PS 89M on January 12, 2002.

NYC-WTC_000174744
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientNam^ NYC-BOE Volume (liters): 1944 Lab Group #: 6310 Filter Type / Filter Area: MCE 385 mm‘ Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/12/02

Analysis Performed By: MARK PEYSAKHOV

GO. - Structure Structure Type Length ID of Structure N or 'J EDS No (Nonadb F B i C >=05 u >-51, Chrys Amphibole Nonasb Arabig/ND No Coord <5|j elements)

.Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: 'I- Positive diffraction pattern properties conforming lo <50% undissolved filter, overlapped or folded Tol a Is laboratoy identification criteria observed <10% particulate coverage >50% coverage ate least 2C unfolded or overiapped grid squares <5% F B C M n/= EDS spectrum conforming ts 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 T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660124

NYC-WTC_000174744

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NYC-WTC_000174744Source: NYC Law Department, mirrored locally

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