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 #: 6208 Fitter Type / Filter Area: MCE 385 mm- Lab Sample #: L4 Grid Opening Size: 0 01124

Client Sample #: 14 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20.000 GRID ID: Accderating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of structure Nor V EDS (Nonadb No F B C M >=05 (J >=5(j Chiys Amphibole Nonasb Amoig/ND No Coord <5|J Elements)

y. /( Y----- /0O-------

Struct = > 0.5n > 5 I Aspect Ratio Grid acceptance:

y= Positive difiraction pattern properties conforming to <50% undissolveO filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 4= EDS SDectrurri conforming to laboratory holes or opaque areas identification criteria observed Chrysoiile AMPHIBOLES Amphibole F = Sngle Fiber Amosite B = Bjndle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Closter (>1 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003105141

NYC-WTC_000184455