TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 7063 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/13/02

Analysis Performed By: - / ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or >1 EDS No (Nonadb F B C M >=05 u >=5)J Chrys Amphibole Nonasb Ambig/ND _ No Coord <5p Elements)

^22 4/

Struct = > 0.5p > 5; I Aspect Ratio Gnd acceptance: v'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% paniculate coverage >50% coverage ate laboratory identification critena observed least 20 unfolded or overlapped grid squares <5% F B c M >5(j 7= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole [ F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I ------------------ i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ) Tremolite M = Matrix Non-Identified I Actinolite NSD = No Structures Detected

CITY_21MC100_0 03102510

NYC-WTC_000183356