TEM Asbestos Air Sample Data Sheet, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm’ Lab Sample ff: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496 mm- GRIP BOX: Magnification: 20,000 GRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 8/25/02

Analysis Performed By; ROMAN PEYSAKHOV

-■ GO. Structure Structure Type Length ID of Structure N or N EDS No >=Q5u “ ' >=5p Monasb (Nonadb F B C M Chrys Amphibole Ambig/ND No Coord <S1J Elerrents)

iPSI Zz’’

3

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ’/= Positive diffraction 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% F B C M i >5rj EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B - Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = CJuster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430254

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175122