TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOL Volume (liters): 1816 Lab Group #: 6908 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 GridJOpernng^z e: 0 01 124

Client Sample #: 18 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3,3/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or \ EDS No (Nonadb F B C M >=05 M >=5jj Chrys Amphibole Nonasb । AmbigfND No Coord <5|j Elements)

---------- ----------- --------- i---------- I 1---------- /

1--- +

1-------- f

1-4

1----- -------------- ---------------- ------------- I Struct = > 0,5(1 >5:1 Aspect Ratio Grid acceptance:

\1= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% fTb C M >5p y = EDS spectrum conforming to laboratory holes or opaque areas —I— identification criteria observed Chrysotile AMPHIBOLES __ I__ 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 Actinolite NorvidenUfietr^ NSD = No Structures Detected

CITY_21MC100_0 03102258

NYC-WTC_000183208