NYC-WTC_000201227

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #:' 7291 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 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 / Analysis Date: 4/1/02

Analysis Perlormed By: ROMAN PEYSAKHOV

Structure Siructure ;ype Length ID of Structure Nor 9 EDS' • GO. (Nonadb No F B C M >=05 p >=5p Cnrys Anphiboie Norasb Ambig/ND No ^Coord Elsmenfs) ,<5p

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Struct = > 0.5g, > 5:1 Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissoivsd filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate east 20 unfolded or overiappec grid squares <5% F B I C M >5p 9= EDS spectrum conforming to laboratcry Poles or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Sing® Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster’>3 Intersections) Antbophyllite Non-Asbestos Tremolite M = Matrix Actinolite pNonAdentifi^ NSD = No Structures Detected

CITY_21MC100_011275491

NYC-WTC_000201230