Appendices 5-13 - Nautilus Cares - Nautilus Minerals

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2. An aliquot(s) of sample after centrifugation (2,500 rpm for 15 minutes) was taken for pH, Eh, temperature, conductivity, alkalinity, sulfide and dissolved oxygen measurements prior to filtration. 3. The remaining solution was filtered through a 0.45 !m acid- 2.4 Analytical methods: pH washed filter to remove particulates prior to chemical analysis. Chemical analysis of the supernatant included: organic carbon, sulfate, Au, Ag, Al, As, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Na, Ni, Pb, Sr and Zn. pH was measured with a TPS Aqua pH meter and Ionode pH electrode. The system was calibrated at pH 7 and 9 in accordance with the instrument manufacturer’s instructions. Redox (Eh) Redox was measured with an Ionode ORP combination electrode and Aqua conductivity/pH meter. The system was calibrated in accordance with the manufacturer’s instructions. Dissolved oxygen Dissolved oxygen was measured with a WP 82Y dissolved oxygen meter with a YSI Model 5739 dissolved oxygen probe. The system was calibrated in accordance with the manufacturer’s instructions. Conductivity Conductivity was measured with a Cyberscan 200 conductivity meter and a Eutech Instruments conductivity probe. The system was calibrated in accordance with the manufacturer’s instructions. Alkalinity Centrifuged samples (25 mL) were analysed by potentiometric titration with 0.01 M HCl to pH 2.5. A CyberScan pH 300 meter (Eutech Instruments) was used to monitor pH changes. Gran function plots of the titration data were used to determine alkalinity. 6
Sulfide Sulfide concentration was measured using the methylene blue colorimetric method (Cline, 1969 and Fonselius, 1983). Sulfide was determined from the absorbance measured at 670nm. Metal and sulfur analyses: Quantitative analysis of dissolved (
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Page 17: Appendix 9 Elutriate Testing Report
Page 20 and 21: Table of Contents 1. Introduction 3
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Page 32 and 33: Concentration (ug/kg ore) (log scal
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Page 40: 5. References ANZECC/ARMCANZ (2000)
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Page 49: Appendix 8: Metal concentrations in
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MODELLING THE DISPERSION AND SETTLE
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TABLE OF CONTENTS 1 EXECUTIVE SUMMA
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2 MODELLING METHODOLOGY AND DATA 2.
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2.3 The SSFATE Model Sediment dispe
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Earth Mechanics Institute of the Co
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3 RESULTS AND DISCUSSION The calcul
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Table 3.1. Summary of areas covered
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Figure 3.3b. Sediment bottom thickn
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Figure 3.3d. Sediment bottom thickn
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4 REFERENCES Swanson J.C., Isaji T.
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MODELLING THE DISPERSION OF THE RET
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TABLE OF CONTENTS 1 EXECUTIVE SUMMA
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Given the range of tidal and basin
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dispersion is modelled using a rand
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Figure 2.1. Data from the ADCP at 6
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2.5 Outfall Configuration and Assum
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3 RESULTS AND DISCUSSION 3.1 Diluti
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Figure 3.1. Snapshot in time of a
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5.0 km at any time during the disch
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Figure 3.2. The expected (or averag
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Figure 3.4 A zoomed in comparison o
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5 REFERENCES Bear, J. and Verruijt,
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Rusin J., Lunel T. and Davies L., 1
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Prediction of underwater noise asso
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Table of Contents 1 Introduction ..
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1 Introduction This report presents
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2 Methods 2.1! Source modelling Cav
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dB re 1uPa @ 1m 200 195 190 185 180
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Figure 3. Source location for the s
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Depth (m) 0 500 1000 1500 2000 2500
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Figure 7. Plots of predicted receiv
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Figure 9. Zoomed view of plots of p
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Figure 11. Predicted maximum level
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for computing a is given in Fisher
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ecent studies have indicated that c
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sources to close range, and that th
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masking ranges for different marina
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References Fisher, F. H., Simmons,
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Appendix 14 The Potential for Natur
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'leaky' and recent lava flows have
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iii.) Incrementally these 1 m swath
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Appendix 15 Stakeholder Consultatio
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Environmental Impact Statement Solw
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Wewak (22 October 2007) Not recorde
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San Diego (17-18 April 2008) Enviro
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Appendices 5-13 - Nautilus Cares - Nautilus Minerals

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