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Table of Contents <br /> 1.0 INTRODUCTION 1 <br /> 1.1 Site History and Background 1 <br /> 1.2 Environmental Setting 2 <br /> 1.2.1 Geology 2 <br /> 1.2.2 Groundwater 2 <br /> 1.2.3 Groundwater Quality 3 <br /> 1.3 Objectives 4 <br /> 1.4 Approach 4 <br /> 1.4.1 Data Collection 4 <br /> 1.4.2 Identification of Site COCs 5 <br /> 1.4.3 Quantitative Assessment 5 <br /> 2.0 SITE DATA SUMMARY 6 <br /> 2.1 Depths to Groundwater 6 <br /> 2.2 Groundwater Quality 6 <br /> 2.2.1 Compliance Samples 6 <br /> 2.2.2 Solids Samples 7 <br /> 2.2.3 Leachate Samples 7 <br /> 2.2.4 Geochemical Evaluation Sampling 8 <br /> 3.0 EVALUATION AND DISCUSSION 9 <br /> 3.1 Water Quality Results 9 <br /> 3.2 Sources of Uranium 12 <br /> 3.3 Dewatering/Mixing 15 <br /> 4.0 CONCLUSIONS AND RECOMMENDATIONS 16 <br /> 5.0 REFERENCES 17 <br /> List of Tables <br /> Table 1 Regional Shallow Groundwater Quality Summary (Table 3 from <br /> Flynn, 2003) <br /> Table 2 Groundwater Quality Results, Compliance Wells - Dissolved - <br /> Through October 2019 <br /> Table 3 Groundwater Quality Results, Compliance Wells - Total - Through <br /> October 2019 <br /> Table 4 Pierre Shale Whole Rock Analysis <br /> Table 5 SPLP Results <br /> Table 6 Dissolved Iron, Selenium and Uranium in Non-Compliance Wells and <br /> Piezometers <br /> Table 7 Field Measured Ferric and Total Iron <br /> Table 8 Select Sample Geochemical Modeled Mineralogy Results <br /> Loveland Ready-Mix Concrete ii December 2019 <br /> „ T E L E S T O <br />