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 /liters); 1944 Lab Group #: 6066 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/9/01

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or T EDS /5> No Coord i_________ No F B C M >=05 pi <5u i >=5(J Chrys Ampfiibole Nonasb Ambig/ND (Nonadb Elements)

/J® 2

Struct = > 0.5|i _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, oveitapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

y'= EDS spectrum confonning to laboratory least 20 unfolded or overlapped grid squares <5% F bTc M >5|J holes or opaque areas identification cntsria observeo Chrysotile AMPHIBOLES ) Amphibole F = S.ngie Fiber Amosite S = Bundle <3 fibers <1 fiber diameter apart Crocidolite Ambiguous" C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NED = No Structures De'.ected

CITy_21MC100_003104637

NYC-WTC_000184100