TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7521 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/24,02

Analysis Performed Bv: ROMAN PEYSAKHOV

GO. Structure Structure Type [ Length ID of Structure N or v EDS (Nonadb No F B C M >=05 (J >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5(j Elements)

Z. Z3_“ TTtTS” ___

I i

I 4___ 1

__ L 1—r Struct = 0.5(1 > 5: i Aspect Ratio Grid acceptance:

V = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laporatory identification critens observed least 20 unfolded or overlapped grid squares <5% i F I B C I .M , >5u v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ■ AMPHtBOLES Amphibole i F = Single Fiber Amosite B = Bundle 1<3 -fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster :>3 Intersections Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite i Non-Idenlil'ied MSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03471263 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177062