NYC-WTC_000191050

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7661 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 15 Grid Opening Size: 0,01124 Client Sample 15 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV tf Grid Openings: 4 Analysis Date: 5/7/02

Analysis Performed By: MARK PEYSAKHOV

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

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Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: Positive diffracbon pattern propertes conforming to "50% undissolved filter, ovedapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 'J- EQS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES 'i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_003090190

NYC-WTC_000191050