NYC-WTC_000220767

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N YC BOE Volume (liters): 1840 Lab Group 7354 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/8/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or \ EDS (Nonadb No F B C M >=05 p “ >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Eiements)

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Struct = >0.5p >5: i Aspect Ratio Grid acceptance: ■v'= Positive diffraction patrem properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identificaPon cetera observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ' /= EOS spectrum conforming to laboratory holes or opaque areas identificatior c.dtera observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 f be-ciameter apart Crocidolite Ambiguous 0 = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detectrsd

CITY_21MC100_000621698 NYC-WTC_000220767