NYC-WTC_000200915

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume fliters): 1840 Lab Group #: 7739 Filter Type / Kilter Area: MCE 385 Lab Sample #: 9 Grid Opening Size: 0.01124 ■Client Sample #: 09 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/14/02

Analysi.s Performed By: MARK PEYSAKHOV

GO. T Structure Structure Type Length ID of Structure N or N EDS (Nonadb --------- A No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND Elements) No Coord : . <5u

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Struct = > 0.5g > 5;LAspecl Ratio Grid acceptance: V= Positive diffraction pattern prooerties conforming to '^50% undissolved fllter, overlapped orfolded Totals ■Laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolced or overlapped grid scuares <5% F B C M -• ^/= EDS spectrum conforming lo 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 j>3 intersections) Anthophyllite Non-Asbestos Tremolite ' M = Matrix N on-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_O11275252

NYC-WTC_000200923