TEM asbestos air sample data, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8760 FyltenJy^HcCZiileivAlESL MCE 385 mm’ Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysts Date: 8/25/02

Analysis Performed By: /fyo ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS ““ No (Nonadb F B C M >=05 p : Ctirys Amphibole Nonasb Ambig/ND Elements) No <5p

Struct = >0.511 > 5; 1 Aspect Ratio Grid acceptance; a/: Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals laboratory - identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or ouertapped grid squares <5% F B C M >5p 'J- EDS spectrum conforming to laboratory holes or opaque areas ' identification criteria observed Chrysotile AMPHIBOLES Amphibole F Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C ■= Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430454 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175171