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Contents 0 <br />Section 1 Introduction <br />1.1 Attenuation Study Objectives ...............................................................1-1 <br />1.2 Background Information .......................................................................1-1 <br />1.2.1 Attenuation in Fate and Transport Assessment .......................1-2 <br />1.2.2 Geochemistry .................................................................................1-2 <br />Section 2 Methodology <br />2.1 Materials Used ........................................................................................ 2-1 <br />2.2 Adsorption Test Methods ..................................................................... 2-1 <br />2.2.1 Leachate Fluid Generation Methods ......................................... 2-2 <br />2.2.2 Batch Attenuation Preparation Methods ................................... 2-2 <br />2.3 Data Presentation ................................................................................... 2-3 <br />Section 3 Results <br />3.1 Absorption Test Results ........................................................................ 3-1 <br />3.2 Attenuation Factor Estimates ............................................................... 3-4 <br />Section 4 Discussion <br />4.1 Arsenic ..................................................................................................... 4-1 <br />4.2 Selenium .................................................................................................. 4-2 <br />4.3 Vanadium ................................................................................................ 4-2 <br />4.4 Uranium .................................................................................................. 4-3 <br />Section 5 References <br />Appendices <br />Appendix A - Supporting Geochemistry Information <br />Appendix B - Laboratory Data <br /> <br /> <br />fit' <br /> <br /> <br /> <br /> <br /> <br />com <br />TAS4986-Denison Minas%Task Order 3 - DMO Sampling and A aWs Plan%Task 3.12 - Sal, Ore, Rxk Data Assessment RepontSunday Rock RepwtWtachmentslAttenuation Report_w rking draft 040309.410c