TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC ROE Volume (liters): 1944 Lab Group #: 6060 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0,04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/7/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F i B C M >=05 pj Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

a (I

Struct = > 0.5n >51 Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties conforminc to undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

<= EDS spectrum conforming to laboratory identification criteria observed least 20 unfolded or overlapped grid scuares <5% holes or opaque areas r Chrysotile F B C M >5u

I AMPHIBOLES Amphibole F = Single Fiber ! Amosite B = Bundle (<3 fibers <1 fiber diameter apan i Crocidolite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos I T remolite I M = Matrix 1 Actinolite ! Non-Identified NSD = No Structures Detected

CITY_21MC100_003104553

NYC-WTC_000184044