NYC-WTC_000214250

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volttine niters): 1920 Lab Group #: 8026 Filter Type / Filter Area: MCE 385 Lab Sample #; 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496

GRID BOX: Magnifleation: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No >=05 p >i5|j Ampfubota Nonasb Ambtg/ND (Ncnadb F B C M Chrys Etements) ’ No Coord <5U

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Struct = > o.5n >5:1 Aspect Ratio Grid acceptance: 'I- Positive diffraction pattern preperties conforming to <50% undhsolKed Star, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratoiy hoteJ Of opaque areas idenbfication criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diarnetar apart Crocidolite Ambiguous C = Chater (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_002852837

NYC-WTC_000214250