TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE A filume (liters): 1944 Lab Group 6028 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 4 Area Examined: 0.04496 mm*

GRID BOX: 6 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/4/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No (Ncnadb F B C M >=05 p >=5p Chrvs Amphibole Nonasb Ambig/ND Elements) No Coord <5u

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I

Struct = > 0 5p ? 51 Aspect Ratio Grid acceptance;

4= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory idenitficafion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% C M v'= EDS spectrum conforming to taooratory holes or opaque areas F P >5p identification criteria observed Chrysotile [ ! AMPHIBOLES j Amphibole F = Single Fiber i Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos ! Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003104467

NYC-WTC_000183984