NYC-WTC_000230297

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6609 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 17 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS ■ No TTcTL T ;>=5p (Nonadb F B C M Chrys Amphibole Nonasb■ Ambig/ND Elements) No Coord <5m

e.

3 zgjdC

Struct-’- > 0.5p .> 5:1 Aspect Ratio Grid acceptance = Positive diffraction pattern properties conforming to <50% undissolved fiiter, overlapped or folded Totals' laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I amphiboles' ■ Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite : Ambiguous _C = Cluster (>3 Intersections) 1 Anthophyllite Non-Asbestos i Tremolite M = Matrix i Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002723157 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230297