TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group ff: 6165 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/21/01

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 9 EDS No (Nonadb F B C M >=05 p :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

z 6 iZsLZt ZE

Struci = > 0.5u > 5:1 Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded T otals labo'atorv identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conlorming to latxiratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle '<3 fibers <' fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersectionsi Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Idennned NSD = No SIructures Detected

CITY_21MC1OO_OO31O496O

NYC-WTC_000184325