NYC-WTC_000208252

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8828 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Acceleratino_yolliig£2 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

.Analysis Performed By: .MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or (Nonadb No F B C M >=C5 u >=5pj Chrys Amphibole Nonasb . Ambig/NO No Coord <5m Eiementsj ■

,21

i !

Struct = > i! 5,0 > 5:1 Aspect Ratio Grid acceptance

0 = Positive diffraction pattern properties corform ng to <50% undissoived filter overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unioiced or overlapped grid squares <5% I F , B C I M Au •7= EDS spectrum conlorming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i I-------- -------------1 C = Cluster (>3 intersections) Anthophyllite I Non-Asbestos j Tremolite M = Matrix i Non-Identified Actinolite MSD = No Structures Detected

CITY_21MC100_003021243

NYC-WTC_000208252