Asbestos fiber analysis results, H.S. of Economics & Finance, Apr

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7351 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample 11 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating VoItage: 100 KeV # Grid Openings: 4 Analysis Date: 4/7./02

Analysis Performed Bv: //fW- MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 7 EDS No >=05 p ; '=5iJ INonadb F B C M Chrys Amohibole Nonasb Amoig/ND No Coord <5d Eiemenis)

’ Z > ^7 z*

'1

Struct = > 0.5|j > 5:1 .Aspect Ratio Grid accsplance: 7= Positive diffraction pattern propehies conforming to <50% undissolved filter, overapped or folded Totals labo'atory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unioided or overlapped grid scuares <5% F B ' C ! M ! >5p 9= EDS spectrum conformmg to laboratory holes or opap je areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <’ fiber diarr.eter apar Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbeslos Tremolite M = Matrix Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03459958 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179553