Water quality data at selected sites in the Mississippi Valley-type Zn-Pb ore district of upper Silesia, Poland, 1995-97

4 Introduction 4 Purpose and Scope 6 Description of Study Area 8 Regional Differences in aquifer characteristics 9 Quaternary 10 Jurasssic 10 Triassic 11 Paleozoic 11 Methods of Study 11 Field Measurements 12 Sample Preparation 12 Analytical Techniques 13 Quality Assurance 14 Field Equipment Blanks 15 Sequential Replicates 15 Standard Reference Samples 15 Ion Balances 17 Acknowledgements 17 References 18