Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet I Client Name: Lab Group #: Airtek 6115 Volume (Iiters): Filter Type / Filter Area: 1300 MCE 385 mm' Lab Sample #: 16 Grid Opening Size: 0.01124 I Client Sample #: 26 Area Examined: 0.06744 mm-

GRID BOX: ( / Magnification: 20,000 P U GRID ID: 7E /J— Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 12/15/01

I Analysis Performed By: MARK PEYSAKHOV

I GO. Structure No Structure Type F B C M >=05 p Length >=5N ChryS ID of structure Amphibole Nonaso Nor 4 Amcig/ND EDS (Nonadb No Coord Elements)

/ ______ 1 i_ ____ _____ ____ ____ _____ _____ _____ <5u

-- Jr' — ---

I I LI I Li 1 I Struct => 0.5µ > 5:1 Aspect Ratio d= Positive diffraction pattern properties conforming to Grid acceptance: <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

I 11= EDS spectrum conforming to laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% holes or opaque areas Chrysotile F B C M >5u

AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous Li C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Li NSD = No Structures Detected Actinolite -__--

NYC-WTC 000098469