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): 1824 Lab Group #: 6908 Filter Type / Filter Area: MCE 385 mnr L^bSample^ I3 Grid Opening Size: 0.01124 Area Examined: 0.04496 mm- Client Sample #: 16 GRID BOX: Maonification: 20.000 GRID ID: Accelerating3^oltag^ 100 KeV # Grid Openings: 4 Analysis Date: 3/3/02

Analysis Performed By: MARK PEYSAKHOV

GO. I structure structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M >=5)j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

.

c 4 n -4 __ L --- 1- 1——[ H4 1

Struct ^>0.5p >5;1 Aspect Ratio Gnd acceptance:

\(= 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 gnd squares <5% F B C M >^ v= 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 C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos : Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03102256

NYC-WTC_000183206