TEM asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7164 Filter Type / Filter Area: MCE 385 mm- I .ah Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm*

GEUD BOX: Magnification: 20,000 GRIPID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NoY”? EDS (Nonadb No F B C M >=05 M :>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

<1^

Struct = > 0.5|i > 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 grid squares <5% F B C M 1 >5p 7= EDS spectrum conforming to iaborator/ holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter aoart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected i.

CITY_2IMCl00_0 03102714

NYC-WTC_000183501