TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Clieni Name: NYC BOE Volume filters): 1928 Lab Group #: 6073 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124

Client Sample #: 20 Area Examined: 0.04496 mm-’

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/10/01

Analysis Performed By; MARK PEYSAKHOV

GO, Structure Structure Type Length ID cf Structure N or 9 EDS No (Nonadb F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

a

Struct = :> 0.5(1 >5:1 Aspect Ratio Gnd acceptance:

-v= Positive diffraction oattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsenzed <10% particulate coverage >60% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u v'= EDS spectrum conforming to laboratory holes or opaque areas identification cnterla observed Chrysotile I AMPHIBOLEF^i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 Sber diameter apart Crocidolite Ambiguous' I Anthophyllite ■ C = Cluster (>3 Intersections) Non-Asbestos Tremolite M = Matrix j Non-Identified Actinolite NSC = No Structures Detected

CITY_21MC100_003104595

NYC-WTC_000184074