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): 1808 Lab Group #: 6897 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 26 Grid Opening Size: 0.01124 Client Sample #: 30 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: # Grid Openings: 4 szs Accelerating Voltage: Analysis Date: 100 KeV 3/2/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure \ or V EDS No >=05 p ; (Nonadb F B C M Chrys Amphibole Nonasfc Ambig/ND _ No Coord <5p Elements)

P I u ' (I : : 4- 4__ __ __ r

1— 1 ]— j—

i I

4------- L

LU

Struct = >05p >5:1 Aspect Ratio Grid acceptance: 4= 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 I >5p v = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102238

NYC-WTC_000183194