NYC-WTC_000201908

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC.BOE Volume /liters): 1840 Lab Group #: 6646 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 .

GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: Analysis Date: 2/12/02

Analysis Performed By; MARK PEYSAKHOV

GO. Structure Structure Type Length ID Ct Structure N or A EDS ' ■ No . (Nonadb F B C M >=05 (J Chrys Amphibole -i Nonasb Ambig/N3 No Coord i <5p Elements)

-4

Struct = > 0,5u > 5:1 Aspect Ratio Grid acceptance: 4= Fositive ciffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory idemifioafion criteria observed <1(1% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ■ 4= EDS spectrum conforming to laboratory holes nr opacite areas identification criteria observed Chrysotile AMPHIBOLES | Amphibole F = Single,Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous' G = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NED = Mo Structures Detected

CITY_21MC100_003269518

NYC-WTC_000201908