NYC-WTC_000200830

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7685 ■ Filter Type / Filter Area: MCE 385 mnC Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample 05 Area Examined: 0.04496

GRID BOX: Magnification: - 20,000 GRID ID: Accelerating Voltage: lOOKeV # Grid Openings: 4 Analysis Date: 5/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or’ 7 EDS ' (Noradb No F B C M >=05 pi j >=5u Chrys Amphibole Nonasb Ambig/ND No Coord Elements) ^5|J I

___ 2- MT -'.... I- 'Y X-A--'

Struct = > 0:5p >3:1 Aspect Ratio Grid acceptance: 8

7= Positive diffraction pattern properties conlorming to <50% Jidisscijed filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

7= EDS spectrum contorminc to laboratoiy least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B e M >5p

identification 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 M = Matrix Tremolite Actinolite Non-Identified NSD = Ng Structures .Detected

CITY_21MC100_0112'7 5180

NYC-WTC_000200832