NYC-WTC_000215539

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters'): 1816 Lab Group #: 6843 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: X' Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/27/02

Analysis Performed By: MARK PEVSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 p >=5iJ Chrys ’ Amphibole Nonasb Ambig/ND No Coord <5p Elements)

<3

Struct = > 0.5q > 5; 1 Aspect Ratio Grid acceptance; V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteriadbserved <10% particulate coverage >50% coverage ate

'/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B C M >5p , holes or opaque areas identification criteria observed ■ Clirysotile .'amphiboles Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix -Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002872556

NYC-WTC_000215539