NYC-WTC_000200545

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1920 Lab Group #: '8'138 Filter Tvpe / Filter Area: MCE 385 mm=' Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: TOO KeV # Grid Openings: 4 Analysis Date: 6/17/02

Analysis Performed By; MARK PEYSAKHOV

GO. Structure Structure Type Length IDofStructure Nor v/ EDS No : V F B C M >=05 p ~ Amphibole Nonasb Ambig/ND (Nanadb >=511 Chrys Elements) No Coord <5p

i ■ J

, Struct = >O.Sp > 5:l Aspect Ratio Grid acceptance: = Positive diffraction pattern properties conforming to ^^0% undissolved filter, overlapped or lolded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u ! ^/= EDS spectrum cnntorming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES 1 Amphibole F = Single Fiber Amosite B = Bundle {<3 fibars <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! , Anthophyllite Non-Asbestos M = Matrix ' 7 Tremolite Actinolite Non-Identified NSD = No Structures Detected ’

CITY_21MC1OO_O11274986

NYC-WTC_000200548