TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client >3!: NYC BOE Volume (liters): 1944 LabCrou! 5‘Cl! Filter Type / Filter Area: MCE 385 mrrC Lab Sam pi n Grid Opening Size: 0.01124 Client San ■!€# Area Examined: 0.04496 mm-

GRID BO? Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Opt imgs: 4 Analysis Date: 11/25/01

Analysis Performed By; pp ROMAN PEYSAKHOV

GO, Structure Structure Type J Length IC of Siruciure N or 7 EDS i (Ncnadb j No F B C M I ’=05 p Chrys Amphibole j Nonasb Ambig/ND No Coord 1 <5p Elements) )

I + ! I

4! E----------

Struct = (I.? J; I Aspect Ratio Gric acceptance: 7= Positive diff-B' < pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identifi' non criteria observed <10% particulate coverage >5070 coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ! 7= EDS spectrun .ontorming to laboratory holes or opaque areas identification crite observed Chrvsotile AMPHIBOLES Ampliiboie F = Single Fiber Amosite B = Bundle (<3 fir J fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 in :-ctione Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structiv-ri Detected

CONFIDENTIAL, CITY_21MC100_003458390 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179178