NYC-WTC_000190742

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7504 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm* GRID BOX: Magnification: 20 000 GRID IP: ShZgS Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/22/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=05 p >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

2g /Of Y:

Struct = ■> 0.5).i >5:1 Aspect Ratio Grid acceptance; <= PosiSve diffracdon pattern properties conforming to '50% undissolved filter, overiapped orfolded Tot^ laboratory identification criteria observed ' 10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|J ■/= 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 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite i NSD = No Structures Detected

CITY_21MC100_003089749

NYC-WTC_000190742