TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7291 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: zici. Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Perlormed By; _____ _____________ ROMAN PEYSAKHOV ^7^ GO, Structure Structure Type [ Length 10 of Structure N or 7 EDS No (Nonadb F B C M j >=05 M >=5(j Chrys Amphibole Nonasb Ambig/ND Elements) No Coord i <5m

Z L T /i£

I

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Struct = > I) OU > 5: i Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% jndissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F ' F ■ B i C I M >5u 0= EDS spectrum conforming tc 'aocratc y holes or opaque areas identification criteria observed Chrysotile ■ ■A.MPHI BOLES ■Amphibole , F = Single Fiber Amosite E = Bundle ,<3 fibers <1 fiber oiameter apart Crocidolite Ambiguous C = Cluster (>3 intersections I Anthophyllite i Non-.Asbestos Tremolite ! ! M = Matrix Actinolite I Non-Identified NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003470768 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176726