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 #: 7483 Filter Type / Filter Area: MCE 385 Lab Sample #: 9 Grid Opening Size: 0 01124 Client Sample #: 09 Area Examined: 0.04496 mm^ GRID BOX: i / LLY Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

.Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor N 1 EDS No aAEis.NC ! 1 F B C M >=05 (J >=5|J Chrys Amphibole Nonasb No Coord <5|j Elements) j

012 Q 1/ a

I Struct = > O.op > 5:1 Aspect Ratio Grid acceptance:

\ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laborator/ identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F ! B I C i M i >5u v = EDS spectrum conforming to laboratory holes or opaque areas L identification criteria observed Chrysotile i 1 AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous S = Cluster i>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471199 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177017