TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume flifers): 1920 Lab Group #: 7148 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 (J >=5iJ Chrys Amphibote Nonasb Ambig/ND No Coord Elements)

If

Struct = ? 0.5p > 5:1 Aspect Ratio Grid acceptance: n/ = 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 >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile /amphiboles ' Amphibole F = Single Fiber I Amosite ; B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos i T remolite ! M = Matrix ; Actinolite 1 Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_011533413 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181572