NYC-WTC_000193261

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE V'olume (liters): 1816 Lab Grmipfi: 8110 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/15/02

Analysis Performed By: MARK PEYSAKHOV

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

----- 1 ---- cG

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: \'= Positive diffraction pattern proper:ies confonning to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obser/ed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B [ C M >5u yj:- EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 1 I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite I M = Matrix NSD = No Structures Detected Actinolite . Non-Identified I

CITY_21MC100_003094394

NYC-WTC_000193261