NYC-WTC_000218178

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7099 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm*

GRID BOX: IW Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/16/02

Analysis Performed By: ROMAN PEYSAKHOV

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

Zz

Struct = > 0.5p ,> 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissotved filter, overlapped or folded Totals laboratory identirtcation criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B Cj M i y/- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES ! .Amphibole E = 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 NSO = No Structures Detected Actinolite _ J__ i _ j

CITY_21MC100_000466019 NYC-WTC_000218178