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): 1840 Lab Group #: 7521 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRIDID: ' AL .Accelerating Voltage: too 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 (Nonadb No F B C M ToTp I>=5(j Chrys Amphibole Nonasb Ambig/ND No Coord <511 Elements)

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Struct = > 0.5p > 5; 1 Aspect Ratio Grid acceptance: y = Positive diffraction pattern oroperties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory loentlfication criteria observed least 20 unfolded or overlapped grid squares <5% F I B i C i M >5u \'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observec Chrvsotile AMPHIBOLES j .Amphibole F = Single Fiber Amosite B = Bunule <3 fibers <1 fiber diameter apart Crocidolite Ambiguous I C = Cluster ;>3 Intersections! Anthophyllite Non-.Asbestos Tremolite M = Matr.x Actinolite i Non-Identified NSD = No Structures Detectec

CONFIDENTIAL, CITY_21MC100_0 03471258 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177057