NYC-WTC_000227887

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6734 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/19/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Staicture Type Length ID of Structure Norv EDS ' No (Nonadb i F B C M >=05 p >=5pi Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

z

Struct “ > 0.5g > 5; l Aspect Ratio Slid acceptarce; 'J- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or oveitapped grid squares '6% F B C M EDS spectrum conforming to laboratory holes or opaque areas identificabon criteria observed Chrysotile AMPHIBOLES , Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Delected

CITY_21MC100_002899399

NYC-WTC_000227887