Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

TEM Asbestos (air) Cunt Sheet Client Name: EM & CA Volume (liters): 1300 • Lab Group #: 6070 Filter Type / Filter Area: MCE 385 mm2 Lab Sample #: 19 Grid Opening Size: 0.01124

Client Sample #: 019 Area Examined: 0.06744 mm=

GRID BOX:• Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 12/9/01

I Analysis Performed By: ROMAN PEYSAKHOV

Structure Type Length ID of Structure Nor EDS GO. Structure v

No F B C M >=05 N >=5N ChryS Amphibole Nonasb AmbigIND Elements) No Coord <5N

•I l

1•

I I

I Struct = > 0.5µ > 5:1 Aspect Ratio - Grid acceptance:

4= Positive diffraction pattern properties conforming to <50°k <10% undissolved filter, overlapped or folded particulate coverage >50% coverage ate Totals laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F I B C M >5N

I v= EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas

AMPHIBOLES Chrysotile Amphibole F = Single Fiber Amosite

LI B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Crocidolite Anthophyllite Tremolite Ambiguous' Non-Asbestos M = Matrix Actinolite Non-Identified NSD = No Structures Detected

NYC-WTC 000098442