TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1968 Lab Group #: 6151 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496

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

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS (Nonadb No ■ C M >=05 J :>=5(J Chrys Amphibole Nonasb Ambig/ND No Coord Eiements) <5p

pi- xXB

Struct = > 0.5(1 _> 5:1 Aspect Ratio Grid acceptance:

y- 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 >5tJ \= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile i AMPHIBOLES ; Amphibole F = Single Fiber Amosite B = Suntile (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos T remolite : M = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O4934

NYC-WTC_000184307