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 #: 7353 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0,01124 Client Sample #: 08 Area E.\amined: 0.04496 mm- GRID BOX: Zc-ZG Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grit! Openings: 4 Analysis Date: 4/7/02

Analysis Performed By: MICHAEL GORYCKI

GO, Structure Structure Type Length ID of Structure Nor N EDS (Noradb ‘ 7/9 No Coord No F B C M >=06 M <5p >=5)4 Chrys Amphibole Nonasb Ambig/ND Elements) I

I

<z5Li /<

Struct = >O.5p >5:1 A.saect Ratio Grid acceptance;

N= Positive diffraction pattern properties conforming to <50% undissGived filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

y= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid sauares <5% holes or opaque areas i F p C j M ' >Fu identification criteria observed Chrysotile AMPHIBOLES Amphibole j F = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix i Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470892 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176806