NYC-WTC_000200545

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Mame: NYC BOE Volume (liters): 1920 Lab Group #: 8138 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000,2 , GRID ID: X2-^ Accelerating Voltage: 100 KeV 1 # Grid Openings: 4rl Analysis Date: 6/17/02/2^

Analysis Performed By: MARKPEYSAKHOV H

GO, Structure Structure Type Length ID of Structure N or 2 EDS No (Nonadb . F- B C M >=05 p i>=5(J Chrys Amphibole Nonasb Ambig/ND r 1 No ; Coord <5u Eiements);

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Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 2= Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals laboratory idenlidcation criteria observed <10% particulate coverage >50% coverage ate least 20 infolded or overlapped grid squares <5% F B C M >5u '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria Observed Ciirysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ) Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected __ !

CITy_21MC100_0112T4995

NYC-WTC_000200557