TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NA'C BOE Volume (liters): 1928 Lab Group #: 6010 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: ] Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV if Grid Openings: 4 Analysis Date: 12/1/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS No r (Nonadb B >=05 p ;>=5(j Chrys Amphibole Nonasb Ambig/ND Elements) No Coord <5p

1 T

Struct = -> 0.5u > 5'.1 Aspect Ratio Grid acceptance; y= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B i C j M I >5p y= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chtysotils AMPHIBOLES Amphibole r = Single riper Amosite E = Bundle i<3 fibers <1 fioer diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections; Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified N3D = No Structures Detected

CITY_21MC100_003104419

NYC-WTC_000183969