TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 LabGroup,^ 7381 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/11/02

Analysis Performed By: ITP ____________ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p >=5(J Chrys Amphibole Nonasb Ambig/ND No <5m Elements)

2 // 7 4

r

I Struct = >0.5h >5:1 Aspect Ratio Grid acceptance: . Positive diffraction pattern properties conforming to <0% undissolved filter, overtopped or folded Totals laboratory identification criteria obsenred <10% particulate coverage >50% coverage ate

. 7= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% MB c M >5p holes or opaque areas identification criteria observed Chrysotile AMPHtBOLES 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-Identifted Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470986 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176871