NYC-WTC_000212643

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7903 Filter Type / Filter Area; MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 01 Area Examined; 0.04496 mm^

GRID BOX: Magnification: 20 000 GRID ID; Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Date: 5/30/02

Analysis Performed By: ROMAN PEYSAKHOV

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

5

■ ■ ■

Struct = >0.5p >5;l 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 overlapped gridsquares <5% F B C M >5m 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 NSD = No Structures Detected

CITY_21MC1OO_OO2867445 NYC-WTC_000212643