TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (airl Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group 7574 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 09 Area Exainined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/29/02

Analysis Performed By: ROMAN PEYSAKHOV

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

I 2-

/5

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

y = Positive diffraclion 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 overlapped grid squares <5% [ C I M j >5p y = EDS spectrum conforming to laboratory holes or opaque areas L ______ P B identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bunole i<3 fibers <1 fiber d ame;er apart Crocidolite .Ambiguous C = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite i Non-Identified NSD = Nc Structures Detected

CONFIDENTIAL, CITY_21MC100_003471363 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177129