TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6694 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: ] Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIB ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/16/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 M :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5|j Elements)

•3 crX 1

Struct = > 0.5 |i > 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped lor folded Totals <10% particulate coverage >50% average ate laboratory identification criteria observed least 20 unfolded of overlapped grid squares <5% F B C M >5p ■7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed , Chrysotile I AMPHIBOLES i Amphibole F - Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite I Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix • Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003433725 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175917