NYC-WTC_000228885

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Vojume (liter si: 1800 Lab Group #: 7723 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm-

GRID BOX; Magnification: 20,000 GRID IP: 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 V EDS No >=05 u Amphibole Nonasb Ambig-iND (Nonadb F B C M >=5p Chrys No Coord cSp Elements)

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Struct = > 0.5ji > S: I Aspect Ratio Ond acceptance: Positive diltraction pattern properties ccnfonning to <50%undissOlved filter, overlaoperi or fotded Totals iaboratory identification oriteffa observed <10% particulatfi coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5w = cOS spectrum conforming to laboratory holes or opaque areas Identificafion criteria observed Chrysotile AMPHIBOLES Ainphiboie F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diarr-eier apart Crocidolite Ambiguous C = Cluster (»3 Intersections) Antho^ytlite Non-Asbestos T remolite M = Matrix Actinolite Non* Identified NSO - No Structures Detected

CITY_21MC100_002901840

NYC-WTC_000228885