Asbestos air analysis results, H.S., May 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7717 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRipiD: Accelerating Voltage: 100 KeV Grid Openings: 4 Analysis Date: 5/11/02

Analysis Pertormed By: / ROMAN PEYSAKHOV

GO Structure i Structure Type Length ID of Structure N or v EOS (Nonadb No F B C M >=05 :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

~r -4- ——

sr

"l

I j Struct = > 0.5p > 5:1 Aspect Ratio Ghd acceptance;

7= Positive diftraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped gnd squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaoue areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos । Tremolite M = Matrix Actinolite Non-Identified ! NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003460739 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179652