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): 1928 Lab Group #: 5986 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: 100 KeV # Grid Openings: 4 Analysis Date: 11/29/01

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or N EDS (Nonadb No Coord No MB c •=05|j <5u Chrys Amphibole Nonasb J Ambig/ND Elements)

cK ;/ vY LI 7 ___ Mrs. It

6^==;

Struct = > 0.5p >5:1 Aspect Ratio 3 rid acceptance; 9= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory identification criteria observeo <10% particulate coverage >50% coverage ate least 20 unfolded oroveriappeo grid squares <5% F B C M >5u EOS soectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES ; Amphibole F = Single Fioer Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite ! Actinolite ; Non-Identified NSD = No Structures Detecteo

CONFIDENTIAL, CITY_21MC100_003458509 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179241