TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYG BOE Volume filters): 1840 Lab Group #: 6409 Filter Type / Filter Area: MCE 385 mirf Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M MTtrn i>=5p Chrys Amphibole Nonasb i Ambig/ND Elements) No Coord <5p

4,^ i '■

I.

Struct = > 0.5p ;>5:i Aspect Ratio Grid acceptance; v'= Positive diffraction pattern p-operties conforming to, <50% undissolved fitter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

V= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% J" holes or opaque areas ’ - Chrysotile I P B C M ! >5p identification criteria observed AMPHIBOLES Amphibole F = Single Fiber I Amosite S = Bundle 5<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i ; I Tremolite M-Matrix Non-Identified 1 - i Actinolite NSD -Nc Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660215

NYC-WTC_000174778