NYC-WTC_000228559

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yoIumejQitersi: 1800 Lab Group #: 7448 Filter Type / Filter Area: MCE 3S5 Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/17/02

Analysis Performed By: r ROMAN PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure N or v ' EOS Nonasb 1 Amoig/ND \ No F B >=05 p Chrys Amphibole No Coord <5p I Clements)

3 -4__ a llh-—

Struct = >0.5u >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B i C I M i >5m v= EOS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber I i Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 1---- T C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ----- 1 1 Tremolite M = Matnx Actinolite Non-Identified NSD = No STuctures Detected

CITY_21MC100_002900994

NYC-WTC_000228559