TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Yame: NYC BOE Volume (liters): 1928 Lab Gruiip #: 6479 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID 11): Accelerating Voltagfe: 100 KeV # Gi'itl Openings: 4 Analysis Date: 1/27/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb • No F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord I <5u Elements)

z 4 <r/ n J[ i

! i

! J i 1

o Struct ’ > 'I.5.U > 5;I Aspect Ratio Grid acceptance:

.°osiiive diflraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboraior/ identification criteria observed least 20 unfolded or overiapped grid squares <5% r F B C M I >5p '/- EDS spectrum conforming to laboratory holes or opaque areas / identification criteria observed Chrysotile i AMPHIBOLES : Amphibole F = Single Fiber Amosite ' B = Bundle 1<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite ; Non-Asbeslos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected J.. .

CONFIDENTIAL, CITY_21MC100_003467578 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180816