NYC-WTC_000199376

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volu me (liters): 1952 Lab Group 4: 8745 Filter Type / F Iter Area: MCE 385 mm- Lab Sample #: 15 Grid Opi ning Size: 0.01124 Client Sample 15 Areal ’xaminecl: 0.04496 mm^ GRID BOX: Mat nification: 20,000 GRID ID: Aeceleratir g Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/24/02

Analysis Performed By: MARK PEYSAKHOV

Go Structure i Structure ’ype Length D of S uctjre N or v EDS

\o Coord No “rTTfcTM >=05 p >=5p Chrys ■ Amphibole ! i ' 1 Nonasb ■ Ambig/ND ' j 1 Elsmenisj <5//

—- -GJ <22 "2^"—

I •I-

Struct == > 0.511 '■ 5:1 .Aspect Ratio Grid acceptance:

= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals aocratory identification criteria ocserved < i0% particulate coverage >50% coverage ais least 20 unfoided or overlapped grid squares <; F B I C Mi >5c \ = =DS soectrum conforming to laocralco/ holes or opaque areas identification criteria /c/er.ec Chrysotile .AMPHIBOLES Amph bole r i Single Fiber Amosite B = Bundle f<3 fibers <1 fleer diameter apart Crocidolite .Ambig lous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite \on-Identified NSD = No Structures Detected

CITY_21MC100_003033664

NYC-WTC_000199376