TEM asbestos analysis data sheet, Sep 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Naine: NYC BOE Volume (liters): 1928 Lab Group #: 8828 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 18 GricLOpeninoLSi^ 0.01124 Client Sample #: 18 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > O.Pp > 5:1 Aspect Ratio Grid acceptance: ^•4- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals ■ laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M ! >5p . y = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F’= Single Fiber Amosite B = Bundle ;<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C* Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Struciures Detected

CONFIDENTIAL, CITY_21MC100_003422052 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175309