TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NY’C BOE Volume (liters): 1928 Lab Group #: 5975 Filter Tvpe / Filter .Area: MCE 385 Lab Sample □ Grid Opening Size: 0 01124 Client Sample #: J Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: 7^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or N EDS (Nonadb No F S c M >=06 p : Chrys Amphibole Nonasb Ambig/ND No Coord <5p Eiements}

7 xZZB5Z // /<

Struct = > 0,5(1 ,> 5:1 .Aspect Ratto Grid acceptance: 7= Fositive 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 >5u V= EDS spectrum conforming to laboratory hoies or opaque areas identfication criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyilite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458439 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179196