Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet Client Name: I Lab Group #: Airtek 6115 Volume (liters): 1300 Filter Type / Filter Area: MCE 385 mm2 Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample #: 30 Area Examined: 0.06744 mm-

GRID BOX: l Magnification: 20,000 GRID ID: '7 C k, Accelerating Voltage: 100 KeV Li # Grid Openings: 6 Analysis Date: 12/15/01

I Analysis Performed By: MARK PEYSAKHOV

I GO. Structure No Structure Type F B C M >O5 1j <5µ Length >=5N j I Chrr/S ID of Structure Amphibole Nonasb Nor 'J AmbrGIND EDS (Nonadb Elements) i No Coord ' / Q

_

I I 1

I ri

Struct = > 0.5µ -> 5:1 Aspect Ratio Grid acceptance: undissolved filter, overlapped or folded Totals 4= Positive diffraction pattern properties conforming to <50% <10% particulate coverage >50% coverage ate laboratory identification criteria observed least20 unfolded or overlapped grid squares <5% F B C M >5u

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

AMPHIBOLES Chrysotile Amphibole F = Single Fiber Amosite Ambiguous I B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Crocidolite Anthophyllite Tremolite Non-Asbestos M = Matrix Non-IdentifiedI Ii I NSD = No Structures Detected —

NYC-WTC 000098473