TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE VolumeJIitersl: 1840 Lab Group #: 7521 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0 01124

Client Sample #: 05 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. ' Structure Structure Type Length ID of Structure N or v EDS (Noradb ‘ No F B c M v/jsT r~>=5pi Ctirys Amphibole Nonasb Amoig/ND Elemenis) i No Coord <5(J

TT__ 2 -ILjZ. 0 4 /A'

n i !

Struct = >O.5p >5:1 .Aspect Ratio GnU acceptance;

v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% f F ' B i C j M , ’> V = EDS spectrum oontorrring to laboratory holes or opaque areas -------------- j-------- .-------- -------- lOenlrficalion criteria ooservsd Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections i Anthophyllite I Non-Asbestos : Tremolite 71 = Matrix Actinolite Non-Identified NSC = No Siructures Detected

CONFIDENTIAL, CITY_21MC100_0 03471261 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177060