TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #; 6173 Filter Type I Filter Area: MCE 385 mm- Lab Sample #: 21 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/22/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb r B C M >=05 M i •=5p Chrys Amphibole Nonasb Amblg/ND No Coord <5tJ Elements) ---------- -----------

Struct = > 0,5p > 5 1 Aspect Ratio Grid acceptance, 9= Ppsitive diffraction pattern properties conforming to <50% undissolved filter, ovehapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% I F I B I C M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas dentiiication criteria observed Chrysotile 1—r AMPHIBOLES Amphibole F - Single Fiber Amosite E = Bundle (<3 fibers <1 *iber diameter apart Crocidolite Ambiguous C = Custer (>3 Intersections) Antbopbyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected I_________________ .J_.. I.

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NYC-WTC_000184359