NYC-WTC_000190195

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client ^ame: NYC BOE Volume (liters)' 1800 Lab Group #. 6856 Filter Type / Filter Area: MCE 385 mm-

Lab Sample #• 14 Grid Opening Size. 0 01i 24

Client Sample #• 17 Area Examined: 0 04496 miTi-

GRID BOX: Magnification 20.000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/27/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N oi / EDS (Nonadb No F i B C M r=QF,.. ' — >=5p Chrys Amphibole Nonasb Ambig/ND No Cooid <5m Elements!

/

HZHzZZ

Stiuct = > 0 5|u >5 I Aspect Ratio Gnd acceptance 4= Positive diffraction pattern properties conforming to <5°* undissolved filter, overlapped or folded Totals I/ 1^Ft laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C 4= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Claysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle i<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_003088747

NYC-WTC_000190195