TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5986 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mtr?

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/29/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type j Length ID of Structure N or EDS (Nonadb No F E r M I >=Q5 u >=5p Chrys Ampnibole Nonasb Ambig/ND Elements) No Coord I <5p fC F 4 Q

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

CONFIDENTIAL, CITY_21MC100_003458500 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179234