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): 1920 Lab Group #: 7483 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: ? Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm* GRID BOX: Magnification: 20,000 GRID ID: 5^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

IL

Struct = ■> 0.5p > 5; I Aspect Ratio Grid acceptance; 0= Positive diffraction pattern propenies 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 C I M I >5u V= EDS spectrum conforming to laboratory holes or opaque areas , identification criteria observed Chrysotile ■AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ■Ambiguous I C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified I Actinolite USD = No Structures Detected I

CONFIDENTIAL, CITY_21MC100_003471192 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177010