TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: OTC BOE Volume /liters): 1952 Lab Group #: 5999 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mtn-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/30/01

Analysis Performed By: MARK PEYSAKHOV

GO. I Structure Structure Type . Length ID of Structure N or 9 EDS (Noradb No F E C M >=05 p >=5l Chrys Amphibole Nonasb Ambig/ND No Coord <5l' Elemems)

. -E

Struct = > 0.5u 5;1 Aspect Ratio Grid acceptance; 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u /= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria ocsetved Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I T remolite M = Matrix Non-Identified I Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458542 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179259