TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group 8759 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 16 Grid Opening Size: 0 01124 Client Sample #: 16 Area Examined: 0 04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ZEZ ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=5pi Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

I

Struct = > 0 5p >5 I Aspect Ratio Gnd acceptance

Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification onlena observed Chrysotile AMPHIBOLES 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 Non-Identified Actinolite NSD.= No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431311

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175515