TEM asbestos air analysis log, Sample 15, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8760 Filter Type / Filter Area; MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 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 Nor y EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5u

-4U_

'x

Struct = > O.Sp > 5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory idenliftcation criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M 'J- EDS spectrum conforming to laboratory bolas or opaque areas identification criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C=<luster (>3 iniersections) Anthophyllite Non-Asbcstos Trennoiite M = Matrix Actinolite Non-ldentified NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003430566 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175201