NYC-WTC_000228801

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1824 Lab Groop #: 7664 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 mm" GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/7/02

Analysis Performed By: MARK PEYSAKHOV

GO Sfructure Structure Type Length IDofStnjcture Nor EDS No (Nixiadb F B C M >=05 M j >=5u Ctirys Afnphibote Nonasb Ambig/ND No Coord <5m E aments;

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Struct = > 0.5(i >5:1 Aspect Ratio Grid acceptance; Positive llffracficn pattern properties conlonning to <50% undissdved filter, overlapped or folded Totals eboratory idenlificaton o-iteria 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 dentiflcalion criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle j<3 (bets d fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 ntersections, Anthophyltile Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSO = No Structures Detected i

CITY_21MC100_002901715

NYC-WTC_000228801