NYC-WTC_000197009

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 6989 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/9/02

Analysis Performed By: MARK PEYSAKHOV

Structure Type Length ID of Structure N or 7 GO, Structure EDS (Nonadb No F B I C M >=05 p Chrys i Amphibole Nonasb Ambig/ND Elements) ' No Coord <5u —I— -----------------1

xjg-

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance;

V= Positive diffraction pattern properties conforming to <50% undissolued filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% f F B C ' M ! v= EDS spectrum conforming to laboratory holes or opaque areas t ---------- 1------ identification criteria observed Chrvsotile 1 AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous 5 B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-ldentified7 ,NSD = No Structures Detected

CITY_21MC100_003044362

NYC-WTC_000197009