TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NTC BOE Volume filters): 1928 Lab Group #: 6010 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: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/1/01

Analysis Performed Bv: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 5 EDS No (Nonadb F B C M >=5iJ Chrys j Amphibole Nonasb Ambig/ND No Coord <5(J Elements) —-----------i----------------

\ -g P -^Fi ■—

Struct = > 0.5p .> 5;1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissotved filter, overtappet) or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% i F B 1 C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification critsris observed Chiysotile AMPHIBOLES Amphibole ■ = Single Fiber Amosite 5 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M - Matrix Actinolite : Norj-ldemifiec NSC = No Structures Detected L CITY_21MC100_003104432

NYC-WTC_000183977