NYC-WTC_000227821

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters): 1S40 Lab Group #: 6646 Filter Type / Filter Area: MCE 385 Lab Sample #; 16 Grid Opening Size: 0.01124 Client Sample #; 16 Area Examined: 0.04496 mm" GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/12/02

Analysis Performed By; MARKPEYSAKHOV

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

3

Struct = > 0.5|x >5:1 Aspect Ratio Grid areeptance: ■>/ = Positive diffraction pattern properties conforming to undtssolved filter, overlapped or folded Totals laboratory Identification_______ ____ J criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M =5iJ V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I AMPHIBOLES I Amphibole F = Single Fiber Amosite B = 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_002899346

NYC-WTC_000227821