NYC-WTC_000218207

NYC 9/11 Public Portal Document

TEM Ast tosfairlCount Sheet Client Name: NYC BOE Volume (liters): 1921 Lab Group #: 7133 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 rnm* GRIP BOX: Magnification: 20 000 GRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 3/19/02

Analysis Performed By: ----- MARK PEYSAKHOV

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

Ai

Struct = > 0.5g ,> 5; 1 Aspect Ratio Grid axeptance: \'= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >51J >/= EDS spectrum conforming to laboratory holes or opaque areas identifioation criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_000466087 NYC-WTC_000218207