NYC-WTC_000201227

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7291 Filter Type / Filter Area: MGE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: Magnificatiom 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadt No ■F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND „ No Coord <51J Elements)

9Z7 tzes: 332 r /CBS: Z.HSe __4a —

Struct = > 0.5g >5:1 .Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% urdrssclved filter, overlapped or folded Totals iaboratory identification criteria observed <10% pErtlculale coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M EDS soectrum conforming to laboratory holes or opaque areas identification criteria observec Chrysotile .-AMPHIBOLES Amphibole F = Sing:e Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C : Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified I Actinolite NSD = No Structures Detected

CITY_21MC100_011275497

NYC-WTC_000201236