TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (lifers): 1840 Lab Group #: 7203 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20 000 GRID ID: 2^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/25/02

Analvsis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length IDofStnjcture N or V ■ EDS (Nonadb No , Coord No F B C M >=05 p <5m I >=5p Chrys Amphibole Nonasb Ambig/ND Elements)

=F

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: <= Positive diffraction pattern properties conforming Io <50% undbsolved filter, overlap^ or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j • 'J= EDS spectrum conforming to iaboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i , Amphibole F = Single Fiber Amosite ' B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470558 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176586