NYC-WTC_000230244

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6549 , Filter Type / Filter Area: MCE 385 mm^ Lab Sample 21 Grid Opening Size: 0.01124

Client Sample #: 21 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/3/02

Analysis Performed By: ROMAN PEYSAKHOV

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

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Struct = > 0.5|i _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals laboratory Identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p : ^= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ! AMPH1BOLES| 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

CONFIDENTIAL, CITY_21MC1OO_OO3388966 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230244