TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7574 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm* GRIP BOX: Magnification: 20,000 GRIP ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Pate: 4/29/02

Analysis Performed By: ROMAN PEYSAKHOV

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

E /I 4 it

Struct = > O.ip > 5:1 Aspect Ratio Grid acceptance:

M = 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 or overlapped grid squares <5% FTB C 1 M , >5u 4= EDS spectrum conforming to laboratory identification criteria obsen/ed holes or opaque areas Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber ciameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite j Non-Asbestos Tremolite M = Matrix i Non-ldentified Actinolite NSC = No Structures Detected i I

CONFIDENTIAL, CITY_21MC100_003471364 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177130