NYC-WTC_000226788

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6853 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: 9^ Al 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 y EDS (Nonadb No F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND <5m ' Elements) I Q/I Coord / P/ J— .5 —

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

>1= 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 overiapped grid squares <5% F B i C M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole r = Single Fiber Amosite B = Bundle |<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>5 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_002923055

NYC-WTC_000226790