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ADS-RPT-2021-14 <br />ESS-Nederland Mine _ 60 <br />November 4, 2021 <br />200 Lake Drive, Glasgow, DE 19702 302.731.1700 Fax 302.731.1701 <br />www.gravertech.com <br />Proprietary and Confidential <br />Page 8 of 8 <br />of 10 minutes is not only practical but may be sufficient to remove the Cd. The kinetic data on Zn <br />removal shows that 40% of the Zn can be removed within 10 minutes. In a full-scale vessel, this <br />should be sufficient to remove a significant portion of the Zn from the Cross water. The major <br />recommendation of this report is that a pilot test be conducted. A pilot test with a lead-lag <br />configuration and appropriate sampling would provide a more complete evaluation of the media’s <br />ability to remove both Cd and Zn to the necessary requirements for the Cross site.