TEM Asbestos air sample results, NWC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NWC BOE Volume (liters): 1928 Lab Group #: 6028 Filter Tvpe / Filter Area: MCE 385 Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/4/01

.Analysis Performed By: ROMAN PEYSAKHOV

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

4 /^- r

Struct ^ >0.5u >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C >5u EDS spectrum conforming tc laboratory M holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES I Amphibole F = Single Fiber ! Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = 'Bluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matra Actinolite Non-Identified NSC - No Structures Detected

CITY_21MC100_003104476

NYC-WTC_000183992