NYC-WTC_000218199

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7121 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: I Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm- GRID BOX; Magnification: 20 000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings; 4 Analysis Date: 3/18/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure N or V ECS (Nonadb No F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

I y 'Z- K ii a

Struct = > 0.5h > 5:1 Aspect Ratio Grid acceptance: '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 overlapped grid squares <5% F B C M >5(J ■/= EDS spectrum conforming to laboratory holes Of opaque areas identifioation criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 Ober diameter apart Crocdolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix - Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_000466061 NYC-WTC_000218199