NYC-WTC_000201030

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1840 , Lab Group #: 7823 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm-

GRIDBQX: Magnification: 20 000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor\ EDS. (Nonadb No F B C M >=05 pi : ■=5y Chrys Amphibole Nonasb Ambig/ND No Coord <5p. Elements)

i Struct - > 0.5p > 5; I Aspect Ratio Grid acceptance; , -i- 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 orovertapped grid squares <5% F F B C M >5|j EDS spectrum conforming to laboratory holes or opaque areas L 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 NSD = Mo Structures Detected

NYC-WTC_000201039