TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7483 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm^ GRID BOX: /p-'s-y Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor 7 EOS No (Nonadb F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) ,2 2^0 nr // // L

/l^

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory loentification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas B j C I M J >5u identification criteria observed Chrysotile i ■AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite I M = Matnx Non-Identified i Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471204 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177022