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expected to occur but were used for worst case analysis) the alluvial water <br />quality may be adversely impacted. Once plant operations are completed, the <br />capping and closure of the CKD storage area will prevent the hypothetical, high <br />leachate volumes from occurring. <br />7.3.6 Summary <br />The results of the solute transport analyses suggest that a hypothetical CKD <br />leachate release will not adversely impact groundwater quality in either the St. <br />Vrain Creek alluvium or the underlying Dakota Sandstone. The solute transport <br />model predicts that the hypothetical leachate release will be sufficiently dispersed <br />during transport so that the existing groundwater quality in the alluvium or the <br />Dakota Sandstone is not adversely affected. The solute transport simulations <br />were performed using conservative model parameters. Under these <br />consenra ive con i ions an assuming no constituent attenuation, the <br />concentration of leachate constituents released to groundwater do not cause the <br />most stringent Colorado primary or secondary drinking water standards or <br />agricultural water quality standards to be exceeded at the hypothetical receptor <br />wells completed in the alluvium or the Dakota Sandstone. <br />20 <br />