Laserfiche WebLink
Section 2 <br />Methodology <br />This section describes the materials and laboratory procedures used to develop <br />attenuation data for the Sunday Mines Group. <br />2.1 Materials Used <br />Based on the MMWP results obtained during the study, a total of five development <br />rock samples were selected to perform attenuation studies. Development rock <br />samples were selected based on results of the MMWP testing (see Section 4.2.1 of <br />Evaluation of Environmental Geochemistry of the Sunday Mines Group) by selecting the <br />sample from each development rock area with the highest concentrations of metals. <br />The development rock sample selection rational is provided below: <br />¦ DM-V4WR-2: This material was selected for elevated metals concentrations in the <br />MWMP of vanadium, arsenic and molybdenum. (Van 4 mine) <br />¦ DM-WSWR-3: This material was selected for the elevated metals concentrations in <br />the MWMP of vanadium, arsenic, molybdenum and selenium. (West Sunday Mine) <br />¦ DM-SJWR-3: This material was selected for the elevated metals concentrations in <br />the MWMP of vanadium, uranium, arsenic, molybdenum and selenium. (St. Jude <br />Mine) <br />• ¦ DM-TPWR-3: This material was selected for the elevated metals concentrations in <br />the MWMP of vanadium, uranium, arsenic and molybdenum. (Topaz Mine) <br />¦ DM-SVWR-2: This material was selected for the elevated metals concentrations in <br />the MWMP of vanadium, arsenic, molybdenum and selenium. (Sunday Mine) <br />The development rock samples were used to generate leachate; this method for <br />leachate generation is further described below. The leachate was then used to evaluate <br />the attenuation properties of the soils by introducing the leachate and soil together in <br />a batch test. Five surface soils were collected from areas immediately adjacent to the <br />development rock piles at each mine site. These soils were used as the solid media <br />during the attenuation tests. <br />2.2 Adsorption Test Methods <br />The following section describes the following adsorption test methods used: leachate <br />fluid generation methods and batch attenuation preparation methods. <br />2.2.1 Leachate Fluid Generation Method <br />Development rock was used to generate leachate containing metals of interest. <br />Development rock samples selected for the batch test were air dried. The samples <br />were homogenized by passing the air dried material through 3/4-inch riffle splitter. <br />The grain size of the development rock was generally less than 3/4-inch. A leachate of <br />? 1, <br />2-1 <br />7:164986-Denison MineslTask Order 3 - DMO Sampling and Analysis Plan%Task 3.12 - Soil, Ore, Rock Data Assessment RepodlSunday Rods ReportWtadrments%Alteruiation Report working draft 040309.doc