NYC-WTC_000229079

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters); 1832 Lab Group #: 7873 Filter Type/Filter Area; MCE 385 mm* Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm’ GRID BOX: Maeaification: 30,000 GRIP ID; Accelerating Voltage; 100 KeV If Grid Openings; 4 Analysts Date: 5/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=06 M :>=5)j Chrys Amphibole Nonasb Ai(*ig/ND No Coord <5u Elements)

Struct = > 0.5n > 5; I Aspect Ratio Grid aixeplance; Positive diffraction pattern properties wnlofltiing to <50% undlssoNed filter, overlapped or tolded Totals <10% partcufete coverage >60% coverage ate taboratory idBntificatiori criteria observed least 20 unfebed or overtspped grid squares <5% F B C M >5p •4- 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 Intersecftons) Anthophyllite Non-Asbestos T remoiite M = Mate Actinolite Non-Identified NSO = No Structures Detected

CITY_21MC100_002902154

NYC-WTC_000229079