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Jeiectea you interpretations - an impel Area, L.owrauo, Carts in uolores, iviontruse <br />anu an lvliguel I.-MIMICS <br />Map symbol and soil name Pct. of <br />map unit <br />Dhs - potential for radioactive <br />bioaccumulation <br />Dhs - potential for radioactive <br />sequestration <br />Rating class and limiting features <br />Value <br />Rating class and limiting <br />features <br />Value <br />Bowdish, cool <br />30 <br />Low bioaccumulation potential <br />High sequestration potential <br />Bioavailability due to attenuation by <br />carbonates or gypsum <br />0.00 <br />Adsorptive capacity due to <br />CaCO3 <br />1.00 <br />Bioavailability low due to CEC, pH, <br />or organic sorption <br />0.00 <br />Adsorption by clay <br />1.00 <br />Gains bioavailable material <br />0.01 <br />Sequestration due to fertility <br />effects <br />0.62 <br />Loses material <br />0.01 <br />Progresso, cool <br />20 <br />Low bioaccumulation potential <br />High sequestration potential <br />Bioavailability low due to CEC, pH, <br />or organic sorption <br />0.00 <br />Adsorption by clay <br />1.00 <br />Gains bioavailable material <br />0.01 <br />Sequestration due to fertility <br />effects <br />0.86 <br />Loses material <br />0.01 <br />87 -Rock outcrop <br />Rock outcrop <br />90 <br />Not rated <br />Not rated <br />88 -Rock outcrop - Orthents complex, 40 <br />to 90 percent slopes <br />Rock outcrop <br />50 <br />Not rated <br />Not rated <br />Orthents <br />45 <br />Low bioaccumulation potential <br />Moderately high <br />sequestrationpotential <br />Bioavailability due to attenuation by <br />carbonates or gypsum <br />0 00 <br />Adsorptive capacity due to <br />CaCO3 <br />1.00 <br />Bioavailability low due to ac, pH, <br />or organic sorption <br />0 00 <br />Adsorption by clay <br />1.00 <br />Gains bioavailable material <br />0.12 <br />Sequestration due to fertility <br />effects <br />0.61 <br />Loses material <br />0.12 <br />Mineral Joe Mine Environmental Protection Plan <br />17 <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 and ore at the Mineral Joe Mine site due to (1) the aggressive nature of the <br />accelerated weathering test, (2) the lack of significant precipitation infiltration, and therefore little moisture <br />available as a leachant under real world conditions, and (3) the relatively short term exposure of the ore <br />stockpile to weathering processes. <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 />4148B.120927 Whetstone Associates • <br />