TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1944 Lab Group #: 5820 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 Accelerating Voltage: 100 KeV

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor 7 EDS No F B C M >=05 |j ; -5p Chrys Amphibole Nonasb Ambig/ND (Nonadb No Coord <5p Elements) i ________ I

> Vi- >7*

!

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

7= 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 gric squares <5% _________ IF B C ( M j >5p y = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile 1 AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-IdentilTed . Actinolite NSD = No Structures Detected .i

CITY_21MC100_003106101

NYC-WTC_000185136