TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m'C BOE Volume (liters): 1952 Lab Group #: 6191 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mm' GRID BOX: -7^/ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/24/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS Nc F B C M >=05 p >=5|J Chrys Amphibole Nonasb Amb,g/ND ___ _ yq Nc Coord <5p I Elements)

z /r

Struct = >0.5u >5:1 Aspect Ratio Grid acceptance: ;/= Positive diffraction pattern propenies conforming to <50% undissolved filter, overlapped or folded Totals labo'atory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B j C M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas loentification crltena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSC = No Structures Detected

CITY_21MC100_003105049

NYC-WTC_000184392