NYC-WTC_000228841

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7698 Filter Type / Filter Area: MCE 385 mm* Lab Sample#; 5 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mtn^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/11/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure StruchjreType Length ID of Structore N or v EDS No (Nonadb F B C M >4)5 p i >=5pj' Ctirys Amphibole Nonasb Ambig/ND No Coord <5y^ ! ■ Eiements] I

S'

I 1

Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance; >1= Positive diffraction pattern properties corforming to <50% undissolved fitter, overtaeped or folded Totals laboratory ^entificaion criteria observed <10% particulate coverage >50% coverage ate

'1- EDS spectrum mrtforming to laboraiory least 20 unfolded or overlapped grid squares <5% F B i C I M >5l holes or opaque areas Chrysotile I (■ idenlifcatiort criteria observed AMPHIBOLES Amphibole F - Single Fiber Amosite S = Bundle J<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD - Mo Structures Detected

CITY_21MC100_002901782

NYC-WTC_000228841