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Meteoric Water Mobility Procedure (MWMP) <br /> MWMP is a short-term leach test used to evaluate the potential for dissolution and mobility of certain <br /> constituents from a rock sample by a single exposure to meteoric water. The MWMP was developed in <br /> the state of Nevada in the 1980s as part of mine waste characterization programs,and this test is now <br /> an American Society for Testing and Materials(ASTM) procedure. <br /> Two samples were tested by MWMP. TBWTCSC,the composite of rock units Creede Formation and <br /> Willow Creek Member with the addition of Shotcrete,and TBWTC,the composite of Creede Formation <br /> and Willow Creek Member only.The following table with pH values for the influent and effluent from <br /> the tests indicate that both samples have buffering capacity as also indicated by ABA results for the <br /> same samples. <br /> TBWTCSC TBWTC <br /> pH <br /> Inf. 5.97 5.97 <br /> Eff. 9.64 8.85 <br /> The effluents from the samples were analyzed for the following list of parameters. The majority of <br /> metals were measured at concentrations near or below method detection limits with the exception of <br /> antimony,arsenic,strontium and vanadium. MWMP results for these samples indicate generally low <br /> metals mobility. <br /> MWMP Analytical Results <br /> Analysis, mg/L TBWTCSC TBWTC <br /> Alkalinity,CaCO3 54 44 <br /> CO3,CaCO3 51 10 <br /> HCO3 2.8 34 <br /> Aluminum <0.045 <0.045 <br /> Ammonia,as Nitrogen 0.16 <0.050 <br /> Antimony 0.020 0.022 <br /> Arsenic 0.044 0.063 <br /> Barium <0.010 0.011 <br /> Beryllium <0.0010 <0.0010 <br /> Bismuth <0.10 <0.10 <br /> Boron <0.10 <0.10 <br /> Cadmium <0.0010 <0.0010 <br /> Calcium 25 31 <br /> Chloride 1.3 1.5 <br /> Chromium 0.0057 <0.0050 <br /> Cobalt <0.010 <0.010 <br /> 5 <br />