NYC-WTC_000203560

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8745 Filter Type / Filter Akrea: MCE 385 mm- Lab_SaiTy21tL^ 13 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/24/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 (J >=5pi Ctirys Amphibole Nonasb Ambig/ND No Coord Elements) <5p . -j

.______ L_— Struct = > O.bp > 5:1 Aspect Ratio Grid acceptance:

u = Positive diffraction pattern properties conforming to <50% undissolved filler, overlapped or folded Totals laboratory identification criteria oosereed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid sduares <5% F i B I C 1 M I >5u 'A tCS spectrum conforming to laboratory boles or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole ? = Single Fiber Amosite S = Bundle (<3 libers < i finer diameter apart Crocidolite Ambiguous .C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003058628

NYC-WTC_000203560