TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 6876 Filter Type / Filter Area: MCE 385 mnC Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm’ GRID BOX: GRID ID: # Grid Openings: 4 SC Magnification: Accelerating Voltage: AnalvsisDate: 20,000 100 KeV 2/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS i (Noradb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

rreHE 77^ (I

J I

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C 1 M >5p 0= EDS spectrurri conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single F ber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified i Actinolite ■ I NSD = No Structures Detected

CITY_21MC100_0 03103566

NYC-WTC_000183941