TEM Asbestos air sample results, NYC SCA, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC SCA Volume (liters): 1928 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 21 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm' GRID BOX: ^^2:3 Magnification: 20,000 GRID ID: 362:1 Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure T ype Length ID of Structure N or 3 EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No i Coord <5m Elements)

1/

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance; '/= Positive diffraction pattern properties conforming to <50% undissolved 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 >5|J 'i- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chi^sotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003100053

NYC-WTC_000182636