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): 1944 Lab Group #: 8149 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 -^3 Accelerating Voltage: Analysis Date: 100 KeV 6/17/02

Analysis Perlormed By: i G* ROMAN PEYSAKHOV

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

2^ a 4=:

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

CITY_21MC100_0 03105756

NYC-WTC_000184904