NYC-WTC_000219820

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7275 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 03 , Area Examined: 0.04496 mm^ GRID BOX: GRIDED: ML Magnification: Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS No (Nonadb F B C M >=05 M >=5)j Chrys Amphibote Nonasb Ambig/NO No Coord <5p Elements)

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Struct = > 0.5 g > 5.1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissotved filter, overlapped or folded Totals laboratory dentificatiori criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped grid squares <5% F B C >5m •7 = EDS SFiectrum conforming to laboratory holes or opaque areas identificalK'n criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersectionsl Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected 1.

CITY_21MC100_002881726

NYC-WTC_000219820