NYC-WTC_000201095

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters): 1920 Lab Group #: 7874 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm"

GRID BOX: //Yt7 MagniFication: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/25/02

Analysis Performed By: ROMAN PEYSARHOV

GO. Structure 1 Structure Type Length ID of Structure N or 7 EDS (Nonadb No ly b C M >=05 u Chrys Amphibcle Nonasb- ■ Ambig/ND No Coord ■ 1 ' <5m - Elements)

-f — I '

Struct = > 0.5u > 5?l Aspect Ratio Grid acceptance: * Positive diffraction pattern properties conforming to <50% undissolved rllter, overlapped or folded Totals /7 -| laboratory identification criteria observed; ■ <10% partc'jlate coverage >50% coverage ate ' least 20 unfolded or overlapped grid squares <5% F B C M >5|j EDS soectrurn conforming to laboratory' - holes or opaque areas identification criteria observed Chrysotile I AMPHIBOLES i Amphibole F = Single Fiber i Amosite 7 ' S = Bundle (<3 fibers <1 fiber diameter apart ' Crocidolite Ambiguous viu= Cluster (>3 Intersections) - Anthophyllite Non-Asbestos ■ / ' M Matrix Tremolite . Actinolite Non-Identified 7; MSD = No Structures Detected

CITY_21MC100_011275391

NYC-WTC_000201107