NYC-WTC_000219543

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1S24 Lab Group #: 6942 Filter Type / Filter Area: MCE 385 IT nr Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No Nonasb L Ambig/Nb I iNonadb F B C M >=05 p : •=5m Chrys j Amphibole No Coord <5p • Eiements)

XZ

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance; '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded To tals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% f ■ F I B ! C ! M 9= EOS spectrum conforming to laboratory holes or opaque areas ■____ I___ /____L— identification critena observed Chrysotile ; A-M PH! BOLES Amphibole ) F = Single Fiber Amosite 8 = Bundle i<3 fibers <1 fiber diameter apart Crocidolite ) .Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non- Asbestos Tremolite M : Matrix I Noii-ldeniified . Actinolite NSD = No Structures Detected

CITY_21MC100_002881249

NYC-WTC_000219543