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): 1816 Lab Group #: 6908 Filter Type / Filter Area: MCE 385 mm-' Lab Sample #: Grid Opening Size: 0.01 124

Client Sample #: 14 Area Examined: 0.04496 mm-

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

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS (Nonadb No Coord No F B c M >5 1.. <5m ; =5p Chrys Amphibole Nonasb Ambig/ND Elements'!

A

1—I 1------- 1 J---- i

c4 t-t 0— ■i------- 1

3—

Slruct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

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

CITY_21MC100_003102255

NYC-WTC_000183204