TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1944 Lab Group #: 6080 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/12/01

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 p •=5(j Chrys Amphibole Nonasb Ambig/ND No Loord <5p Elements)

2

T

Struct = > 0.5p > 5 1 Aspect Ratio Grid acceptance: N = Positive diflraction pattern properties contorming to <60% undissolved filtei, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% C M 'I- EDS spectrum conforming to laboratory _________ F i B >5p holes or opaque areas identification critena observed Chrysotile i AMPHIBOLES ) Amphibole F = Single Fiber Amosite 6 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC1OO_OO31O4698

NYC-WTC_000184150