TEM asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: m-’C BOE Volume /liters): 1809 Lab Group 6610 Filter Tvpe / Filter Area: MCE 385 mrn- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: •Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02

Analysis Performed By: MARK PEYSAKHOV

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

xgcXVl? I .2: crx" — a

Struct = > O.opi > 5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate covarage >50% coverage ale leas: 20 unfolded or ovenapped grid squares <5% j F j B I C i M • >5p <= EOS specifum conforming to laaoraicry holes or opaque areas ioentiiication criteria ooserved Chrvsotiie ■ iI ■AMPHIBOLES Amphibole | r = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite •Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Non-Identified i NSD = No Structures Detected Actinolite L I 1. . CITY_21MC1OO_OO31O3O85

NYC-WTC_000183744