TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 8739 Filter Type/Filter Area: MCE 385 mm’ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 8/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C >=05 M Chiys Amphibole Nonasb Ambig/ND No Coord Elements) <5m .n Z3S XA IL

Struct = > 0.5n > 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 >60% 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 AMPHIBOLES Amphibole F = Single Fiber Amosite B - Bundle (<3 libers <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_003430925 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175408