NYC-WTC_000188449

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume filters); 1832 Lab Group #; 7872 Filter Type / Filter Area; MCE 385 mm^ Lab Sample #: 17 Grid Opening Size: 0.01124 Clieat Samnle #: 20 Area Examined; 0.04496 mm^ GRID BOX; Magnification: 20 000 GRIDED; 7^ Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Date; 5/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C M >=05 M ■>=5p Chrys Amphibole Nonasb AmbigW <5u Elements)

7^

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: 'Z- Positive diffraction pattsm properties conforming » <90% undissolved Mtir. overtapped or folded Totals laboratory MantWcation criteria observed <10% particulate coverage >50% coverage ate least 20 unfeWad or overiapped grid squares <5% F B C M >5m >/= EDS spectrum contorming to laboratory holes or opaque areas identittcadon criteria observed Chrysotile AMPHIBOLES Amphibole F> Single Fiber Amosite Crocidolite Ambiguous B = Bundle (<3 fibers <1 Rier diameter apart C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Idcntified NSD = No Sliuctures Detected

CITY_21MC100_003080573

NYC-WTC_000188465