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

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NY’C BOE Volume (liters): 1920 Lab Group #: 7351 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm-

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

Analysis Performed By; /44c- MICHAEL GORYCKI

GO, Structure Structure Type Length ID of Structure N or EOS (Nonadb No F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/NO No Coord <5u Elements)

/ .n A CA fl ef

Struct = > 0.Op >5:1 Aspect Ratio Grid acceptance:

y = Positive diffracticn pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 2G untoldea or overlapped grid squares <5% C ! M ! ■ 9= EDS spectrum conforming to laboratory holes or opaque areas ) identification criteria observed Chrysotile [ AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous I ! C = Cluster (>j Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite j Non-ldentified j NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003459959 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179554