NYC-WTC_000194507

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client.Name: NYC BOE Volume (liters): 1928 Lab Group #: 7787 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/18/02

Analysis Performed By: l\/ ROMAN PEYSAKHOV

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

I

Struct = > 0-5|j > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

7= EDS spectrum conforming to laboratory least 20 unfolded or overtapped grid squares <5% holes or opaque areas F B c M >5m

identificarion criteria observed Chrysotile AMPHIBOLES 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 Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 04151551

NYC-WTC_000194507