NYC-WTC_000212107

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7393 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: MARK PEYSAKHOV

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

J

Struct = > 0.5g _> 5:1 Aspect Ratio Grid acceptance: •/ = Positive diffraction pattern properties conforming to *5®'^ 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 >5m •/= EDS spectrum conforming to laboratory holes or opaque areas identification 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 = Matrix Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_002866108

NYC-WTC_000212107