NYC-WTC_000229125

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (litersl: 1848 Lab Group #; 7901 Filter Type / Filter Area: MCE 385 mm^ Lab Sample 10 Grid Opening Size: 0,01124 Client Sample #: 12 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Opeaings: 4 Analysis Date: 5/29/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length IDofStrucfore Norv EDS No iNofadb F B C M ■>=0511 >=5p Chrys Amphtoole Nonasb Ambig/TJO No ird <5p Etementej

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Struct = > 0.5g > 5;! Aspect Ratio Gird acceptance: Positive difiradcn pattern properties conforming to «"***«’ «•*?«» «•<*“ Totals laboratory Identtftcatson cntena observed <10% paniculate coverage >50% coverage ate least 20 unfoWed or overiapped giid squares <5% F B C M EDS spectrum contorming Io laboratory holes or opaque areas itoitificattw criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B' Bundle («3 fibers <1 fiber diameter, apart Crocidolite Ambiguous C = Cluster (>3 intersections) AnthophyBite ■ Non-Asbestos Tremolite M = Ma!rw Actinolite Non-Jdentified NSO = No Structures Detected

CITY_21MC100_002902243

NYC-WTC_000229125