NYC-WTC_000193301

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1840 Lab Group #: 8137 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm=

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/17/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length fD of Structure Nor \ EDS No (Nonadb F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

—Ci’ CL/

Struct = >0.5p > 5:1 Aspect Ratio Grid acceptance: ^l= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m '/= EDS spectrum conforming to laboiato^ holes or opaque areas identification criteria observed Clirysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix -Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_003094453

NYC-WTC_000193301