TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume filters): 1920 Lab Group #: 6684 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/15/02

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No (Nonadb F B C >=05 p :>=51J Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

X X X

Str uct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: </= Positive diffraction pattern propertiesconforming 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% r F B C M >5p V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile AMPHIBOLES Amphibole F = Single Fiber I Amosite 0 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ' Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467950 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181081