TEM asbestos air analysis log, Sample 9, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

-■ GO. Structure Structure Type Length ID of Structure NorN EDS |. [Nonadb i No F B C M >=05 p >=5|J Chrys Amphibole Nonasb Ambig/ND Elements) No Coord <5p j

Struct = > O.iu .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to "50% undissolved filter, overlapped 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 EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite B = Bundle (c3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-ldentified NSD = No Structures Dstsctefl

CONFIDENTIAL, CITY_21MC100_003430560 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175197