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): 1824 Lab Group #: 7123 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/18/02

Analysis Performed By: ROMAN PEYSAKHOV

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

I PT V Jl if :

Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to ^^0% undissolved filter, overlapped or folded Totals laboratory identification criteria observed * 10% particulate coverage >50% coverage ate least 20 unfolded or cveriapped grid squares <5% F B C M >5m 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 T remolite M = Matrix .. Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_003102627

NYC-WTC_000183440