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): 1952 Lab Group #: 6121 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 8 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/17/01

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 4 EDS (Nonadb No F B C M «05(j >=5(j Chrys Amphibole Nonasb Ambig/ND Nc Coord <5|j Elsments)

/GR I 6 3 22^ -J__ // 525 ___

Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming tp <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

4= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas r F B C M >5u oentification critena observed Clirysotile AMPHIBOLES Amphibole = = Single Finer Amosite S = Bundie (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Idcntificd Actinolite NSD = No Structures Detected

CITY_21MC100_003104845

NYC-WTC_000184248