NYC-WTC_000204736

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1920 Lab Group #: 7358 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 01 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/8/02 ,

Analysis Performed By: MARK PEYSAKHOV

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

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

v' = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria ooserved <10% particulate coverage >50% coverage ate

7= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas [ F I B CM >5p Identification criteria observed Chrysotile j AMPHIBOLES Amphibole j j F = Single Fiber Amosite EJ = Bundle (<3 fibers <1 fiber disimeter apart Crocidolite Ambiguous I i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos , Tremolite M = Matrix Non-Identified j Actinolite USD = No Structures Detected

CITY_21MC100_003061824

NYC-WTC_000204736