TEM asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6398 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm^ Magnification: 20,000 GRID BOX: GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/22/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/NO Elements) No Goord i <5p

ZJ A ^'<3

Struct = > 0.5(1 ,>,5; 1 Aspect Ratio Grid acceptance: v'= Positive dittractlon pattern p'operties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 2C unfolded or overlapped grid squares <5% B M >5p N= EDS spectrurri conforming to laboratory - ! F C holes or opaque areas identification Griteria observed Chiysotile 1 AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundis (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbcstos :TremOlite M = Matrix NSD = No Structures Detected I Actinolite Non-Identified .. L

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660194

NYC-WTC_000174765