NYC-WTC_000228944

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7778 Filter Type / Filter Area: MCE 385 mtn^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mrr?

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/18/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length iD of Structure N or V EDS (Konadb No F B c M ■

>=05 p Chrys Amphibole i Nonasb Ambig/ND No Coord <5u Elements) ;

''

..

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: V' Positi/e diffraction pattern properties conforming to <50% undissolved filter, ovedapped or folded Totals laboratory idsnlifiratiob triteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C i M r >5u V= EDS spectrum conforming to laborato^ boles or opaque areas . J identification criteria observed Chrysotile AMPHIBOLES Amphibole" F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidoiite Ambiguous C = Cluster (>3 InlersactionsS Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Slfuctures Detected

CITY_21MC100_002901946

NYC-WTC_000228944