NYC-WTC_000200879

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientNani^ NYC BOE Volume (liters): 1920 Lab Group #: 7721 Filter Type / Filter Area: MCE 385 Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 02 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/12/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No Coord No n, B j c M >=05 u Chrys Amphibole Nonasb I Ambig/ND Elsmenls) <5 J • I - r-' / /S-CS

Struct > O.Sp. > 5:1 Aspect Ratio Grid acceptance; y = Positive diffraction pattern properties conforming to <5C% urdissclved 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 >5p yr= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster ;>3 Intersections) Anthopnyllite Non-Asbestos M = Matrix Tremolite Actinolite, Non-ldentified NSD = No Structures Detected __ L. .

CITY_21MC1OO_O112752O1

NYC-WTC_000200880