TEM asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #; 6548 Filter Type / Filter Area: MCE 3 85 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/3/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F BTc M >=05 p >=5iJ Chrys Amphibole Nonasb Ambig/ND , /> No Coord <5p Elements)

oTT ___ : 02 G t

/Q

H-------------------- 4

__ I M I i

4I p

1—r

i Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance; y = 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% F F B C M 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 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_003467699 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180900