Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

I TEM Asbestos (air) Count Sheet

I Client Name: Lab Group #: Airtek 6115 Volume (liters): Filter Type / Filter Area: 1300 MCE 385 mm2 Lab Sample #: 18 Grid Opening Size: 0.01124

I Client Sample #: 28 Area Examined: Magnification: 0.06744 mm'

GRID BOX: ( C/ 20,000

1 GRID ID: # Grid Openings: 6 F Accelerating Voltage: 100 KeV Analysis Date: 12/15/01

I Analysis Performed By: -1, MARK PEYSAKHOV

E1 GO. Structure No Structure Type Length ID of Structure Amphibole Nonasb Nor v Ambig/ND EDs (Nonadb F B C M >=05 N >=5u Chrys No Coord <5N Elements)

ID

I

LU ~J I I I 1 I Struct => O.5 .0 .>5:l Aspect Ratio Grid acceptance: '= Positive diffraction pattern properties conforming to <50% undissolved filter, oveiiapped or folded <10% particulate coverage >50% coverage ate Totals laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% M >5u I EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas

AMPHIBOLES Chrysotile F B C

Amphibole F = Single Fiber

I 8 = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Amosite Crocidolite Anthophyllite Tremolite Ambiguous Non-Asbestos M =Matrix Non-Identified I_

I Actinolite NSD = No Structures Detected

NYC-WTC 000098471