NYC-WTC_000228193

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7172 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #; 15 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20 000 GRIDID: Accelerating Voltage: 100 KeV #01*1(1 Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or V ECS (Nonadb No F B C M >=05 iJ ■>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

<2 cox'

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance; V- 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 overiapped grid squares <5% F B C M >5iJ -'I- EDS spectrum conlorming to laboratory holes or opaque areas identHication 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 = Matra Non-ldentified NSD < No Structures Detected Actinolite I

CITY_21MC100_006617815 NYC-WTC_000228193