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): 1816 Lab Group #: 7235 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/27/02

Analysis Performed By: ______ ) f________ IIP ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS 1 (Nonadb No F B C M >=05 (J >=5m Chrys Amphibole Nonasb Ambig/ND Elements) A No Coord <5u

z Pl —

/— i i

I I I i---- Struct = > 0.5)1 > 5:1 Aspect Ratio Gnd acceptance;

7= 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% \i' = EDS spectrum conforming to laboratory holes or opaque areas I B C \I -..

identification criteria observed Chrysotile i AMPHIBOLES Amphibole i F = Single Fiber Amosite 3 = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C Cluster (>3 Intersections'; Anthophyllite Non-Asbestos j Tremolite M = Matrix I Non-Identified j Actinolite NSD = No SIrucrures Detected

CITY_21MC100_003102861

NYC-WTC_000183609