TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEMAsbestosJairlCount Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 8242 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/23/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: = Positive diffraction pattern properties conforming to <50% undissolved filfer, overfapped or folded Totals laboratory Identification criteria observed <10% parficulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u ^= EDS spectnjm conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003461762 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179885