TEM Asbestos air sample results, NYC BOE, Apr 2002

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: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area E.xamined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: 27^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/1'02

Analysis Perlormed By; /V ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS i No (Nonadb ! F B C M >=0^1] i>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

7r 3^ ’ tr 9^2:_ u-

I I

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% 1 holes or opaque areas I ' F B 1 C I M i >5p identification criteria observed Chrysotile , A.MPHIBOLES Amphibole , F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ' C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Matnx i Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470759 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176718