NYC-WTC_000228980

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7797 Filter Type / Fitter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size; 0.0II24 Client Sample #: 04 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: S/19/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or v’ EDS I No (l^onadb F B C M >=05 u" Chrys Amphfete Nonssb No Coord <5m Elements} [

' -3

Struct = >0.5p > 5:1 Aspect Ratio 3rid acceptance 'Z = Positive diffraction pattern properties conforming to '^0% undissotved filter, faW«l Totals _ .... ideniiScation criteria observed laboratory ^10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M "SU '/= EDS spectrum conforming to latwratory tidies or opaque areas Icfento&ft critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersectonsl Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified MSD - No Structures Detected

CITY_21MC100_002901997

NYC-WTC_000228980