TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1S24 Lab Group #: 6876 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 25 Area Examined: 0-04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p >=5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elemente)

UE V__ a__ J

Struct = > 0.5,14 > 5:1 Aspect Ratio Grid acceptance:

7= Positive diffraction pattern properties conforming to <50% undissolued filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% C M .>5u 7= EDS spectrum conforming to laboratory holes or opaque areas i B identification criteria observed Chiysotile j AMPHIBOLES Amphibole i r = Single Fiber Amosite B = Bundle ;<3 fibers <1 fiber dianneter apart Crocidolite Ambiguous i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos 4 Tremolite M = Matrix Non-Identified t Actinolite NSD = No Structures Detected

CITY_21MC100_003103576

NYC-WTC_000183951