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): 1816 Lab Group #: 6876 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 12^ Accelerating Voltage: Analysis Date: 100 KeV 2/28/02

Analysis Performed By: _____ l\J’ _________ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Noraso Ambig/ND No Coord <5u Elements)

I? h

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Tot^ <10% particulate coverage >50% coverage ate laboratory identification criteria observec least 20 unfolded or overlapped grid squares <5% F B C M >5u V- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03103560

NYC-WTC_000183936