NYC-WTC_000192792

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7661 Filter Type / Filter Area: MCE 385 Lab Sample #: 17 Grid Opening Size: 0.01124 Client Sample #: 1.7 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/7/02

Analysis Performed By: MAJOC PEYSAKHOV

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

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: a/= Positive diffraction pattern properties conforming to <50% undissolved filtef, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5m . •7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart : Crocidolite Ambiguous C = Cluster (>3 Intersections) ■ Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003093208

NYC-WTC_000192792