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JCICCICU JVII lUKI pl CZa UUUJ - J0.., t.ur.,u <br />Map symbol and soil name Pct. of <br />map unit <br />. fli ..a, �.u.m au.. a a. w ua vu.u. vu, a•amu. uu.. <br />Dhs - potential for radioactive <br />bioaccumulation <br />u.... v.... .... f ,..e. .............., <br />Dhs - potential for radioactive <br />sequestration <br />Rating class and limiting features Value <br />Rating class and limiting Value <br />features <br />Bowdish, cool 30 <br />Low bioaccumulation potential <br />High sequestration potential <br />Bioavailability due to attenuation by 0.00 <br />carbonates or gypsum <br />Adsorptive capacity due to 1 00 <br />CaCO <br />Bioavailability low due to CEC, pH, 0.00 <br />or organic sorption <br />Adsorption by clay 1.00 <br />Gains bioavailable material 0.01 <br />Sequestration due to fertility 0 62 <br />effects <br />Loses material 0.01 <br />Progresso, cool 20 <br />Low bioaccumulation potential <br />High sequestration potential <br />Bioavailability low due to CEC, pH, 0.00 <br />or organic sorption <br />Adsorption by clay 1.00 <br />Gains bioavailable material 0.01 <br />Sequestration due to fertility 0.86 <br />effects <br />Loses material 0.01 <br />87 -Rock outcrop <br />Rock outcrop 90 <br />Not rated <br />Not rated <br />88 -Rock outcrop - Orthents complex, 40 <br />to 90 percent slopes <br />Rock outcrop 50 <br />Not rated <br />Not rated <br />Orthents 45 <br />Low bioaccumulation potential <br />Moderately high <br />sequestrationpotential <br />Bioavailability due to attenuation by 0.00 <br />carbonates or gypsum <br />Adsorptive capacity due to <br />1.00 <br />CaCO3 <br />Bioavailability low due to CEC, pH, 0 00 <br />or organic sorption <br />Adsorption by clay 1.00 <br />Gains bioavailable material 0.12 <br />Sequestration due to fertility 0 61 <br />effects <br />Loses material 0 12 <br />JD -6 Mine Environmental Protection Plan <br />16 <br />Table 8. Potential for Radioactive Bioaccumulation and Sequestration of Site Soils (Part 2) <br />5.4.2 Fate and Transport <br />The occurrence of COPCs in SPLP leachates does not necessarily indicate that these constituents will be <br />mobilized from the waste rock or temporary ore stockpile and migrate to groundwater or report to a point <br />of compliance or environmental receptor within a reasonable time frame. The fate and transport of <br />constituents in groundwater is generally controlled by three mechanisms or pathways: release, transport, <br />and uptake. <br />5.4.2.1 Release <br />The SPLP test is intended to investigate which constituents could be released from rock by meteoric water <br />that infiltrates through waste rock or ore stockpiles. However, SPLP results may overestimate the release <br />of constituents from waste rock at the JD -6 site due to (1) the aggressive nature of the accelerated <br />weathering test and (2) the lack of significant precipitation infiltration, and therefore little moisture <br />available as a leachant under real world conditions. <br />The SPLP is a relatively aggressive test that may conservatively overestimate environmental releases. As <br />reported by DRMS (2006): <br />"The SPLP test is a rigorous physically aggressive test that combines "synthetic" <br />rainwater with the solids, which are finely crushed, then tumbled together for a number of <br />hours... The Division considers this test to be "conservative" for several reasons: (a) the <br />rock samples present an extraordinarily high surface area to the leachant, relative to what <br />4148A.120927 Whetstone Associates <br />