NYC-WTC_000228835

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1808 Lab Group #: 7684 Filter Type / Filter Area: MCE 385 Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample 17 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: iOO KeV Grid Openings: 4 Analysis Date: 5/9/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or v EDS ! No M5p ■>=5p (Nonadb I F B C M Ctirys Amphibole Nonasb Ambigj^JD No Coord <5p Elements}

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Struct = > 0.5p > 5 t Aspect Ratio Grid acceptance: '1- Positive diffraction pattern properties conforming to <50% uiidiMOlved filter, overlapped or folded Totals labcratory identificatnn critera observed <10% particulate coverage >50% coverage ate least 20 unfolded oroveifapped grid squares <5% F B C M I EDS spectrum conforming tc laboratory holes or opaque areas identificabon criteria observed Chrysotile AMPHIBOLES : Amphibole F = Single Fber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C= Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remotite M = Matrix Actirrolite Non-Identified NSD s No Structures Detected

CITY_21MC1OO_OO29O1768

NYC-WTC_000228835