TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 8226 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV #GridOnenin2s; 4 Analysis Date: 6/23/02

Analysis Performed By:. ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or ■/ EDS No >=05 p, : (Nonadb F B C M Ctirys Amphibole Nonasb Ambig/ND No Coord <5p ■ Elements)

/? 7

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: '/ = Positive diffraction pattern properties conforming to *50% undissolved filter..overlapped or folded Tot^ laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid’squares <5% F B C M >5|J EDS spectrum conforming to laboratory holes or opaque areas iderrtification criteria observed Chrysotile ' AMPHIBOLES J Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite • Non-Asbestos Tremolite j M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003105904

NYC-WTC_000185010