TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEMAsbestosIairLCount Sheet Client Name: NYC BOE Volume /liters): 1952 Lab Group #: 5891 Filter Type Filter Area: MCE 385 mnr Lab Sample #: 18 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0,04496 mm* GRID BOX: Magnilication: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or V EDS I (Nonadb | No F B C M >=05 M >=5|J Chrys '■ Amphiboie Nonasb Ambig/ND No Coord <5u Elements) )

3 / ff

Sfruct = > 0.5m > 5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conforming to <50% undissDlved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% ! F i B C i M >5u 4= EDS spectrum conforming to laboratory holes 0,'' opaque areas identification criteria observec Chrysotile j AMPHIBOLES i Amphibole I F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ) C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos s Tremolite M = Matrix Non-Identmed : Actinolite NSD = No Structures Defected

CITY_21MC1OO_OO31O6431

NYC-WTC_000185353