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 #: 6990 Filter Type / Filter Area: MCE 385 mm- Lah Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/9/02

Analysis Performed By: _ MARK PEYSAKHOV

GO Structure 1 Structure Type Length ID of Structure N or s' EDS No (Nonadb F I B I C I f.M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Eiemerts)

H

E

Struct = > 0.5(j > 5:1 Aspect Ratio Grid acceptance: /= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laooratory identification criteria oDservec least 20 unfolded or overlapped grid squares <5% F B ! C I M I Ep V= EDS spectrum conforming to •mc'mc, holes or opaque areas identification criteria ODsen/ed Chrvsotile amphiboles Amphibole F - Single Fiber Amosite 8 = Bundle i<3 fibers <i fiber diameter aparl Crocidolite Ambiguous C = Cluster !>3 Intersections,! Anthophyllite Non-Asbestos Tremolite M = ,yatrix Non-Identificd Actinolite NSD = No Structures Delected

CITY_21MC100_003102390

NYC-WTC_000183285