TEM Asbestos air sample results, NYC BOE, Apr 28 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7558 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 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/28/02 Analysis Performed Bv: "

ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or M EDS No (Nonadb F B C M >=05 u >-5b Chrys Amphibole Nonasb Ambig/ND Elements) I No Coord <5|J

_ZL_

'{0

Struct = >0.5u >5;1 Aspect Ratio Grid acceptance; y/- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria ocsen/ed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ) >5p y = EOS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole r = 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 = Mo Structures Detected

CONFIDENTIAL, CITY_21MC100_003471326 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177105