NYC-WTC_000227115

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yoliim«L{!itersli 1824 Lab Group #: 6898 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: /a/zM Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/3/02

Analysis Performed By: ROMAN PEYSAKHOV

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

X

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 oroveriapped grid squares <5% F B C M >5u 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 Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_002898336

NYC-WTC_000227115