TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6896 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm=

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3G/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length lOTf Structure N or 4 EDS (Nonadb No F B C >=05 |j Chrys Amphibole Nonasb Ambig/NO No Coord /—s. <5p Eiements)

£ zP

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved fillet, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M I >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambiguous i

C = Cluster (>3 Intersections) M = Matrix Anthophyllite Tremolite Non-Asbestos j Non-Identified -i Actinolite NSO = No St.ructures Detected

CONFIDENTIAL, CITY_21MC100_003468271 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181289