Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

TEM Asbestos(air) Count Sheet Client Name: EM & CA Volume (liters): 1300 Lab Group #: 6070 Filter Type / Filter Area: MCE 385 mm' Grid Opening Size: 0.01124 Lab Sample #: 21 Area Examined: 0.06744 mm' Client Sample #: 021 GRID BOX: 0 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 12/9/01

Analysis Performed By: fV ROMAN PEYSAKHOV

I GO. Structure No F Structure Type •g C M >=05 N Length >=5p Chrys 10 of Structure Amphibole Nonasb Nor Ambig/ND EDS (Nonadb Elements) No Coord <5u

___ ___ ---- T___ ___ ___ ___ ___ ___ ___

I ____ ____________ H I I Struct => 0.5µ > 5:1 Aspect Ratio J= Positive diffraction pattern properties conforming to Grid acceptance: <50% undissolved filter, overlapped or folded <10% particulate coverage >50% coverage ate Totals laboratory identification criteria observed M 1 '4= EDS spectrum conforming to laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% holes or opaque areas

AMPHIBOLES Chrysotile Amphibole F B C >5µ

II F = Single Fiber 8 = Bundle (<3 fibers <1 fiber diameterapart C = Cluster (>3 Intersections) Amosite Crocidolite Anthophyllite Tremolite Ambiguous Non-Asbestos M = Matrix Actinolite Non-Identified 1 NSD = No Structures Detected

NYC-WTC 000098444