NYC-WTC_000227982

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6873 Filter Type / Filter Area: .MCE 3S5 mm- Lab Sample #: 4 Grid Opening Size: 0.O1124 Client Sample #; 04 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIP ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No >=05 u (Nonadb F B C M >=5(j Chrys Amphibole Nonasb Ambtg/ND Elements) No Coord <5p 7 a

I 1

Struct = >0.5p > 5:1 Aspect Ratio Grid acceptance: •7= Positive diffraction pattern properfiea conforming to <50% undissolved filter, overlapped or folded Tot^ latioratory identificahoD criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M A- EDS spectrum conforming to laboratory holes or opaque areas identification oritena observed Chrysotile AMPHIBOLES /Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite -Ambiguous C = Cluster (>3 Intersections) Anthophyllite , Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_002899561

NYC-WTC_000227982