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bi-annual surveys of the embankment configuration and disposal <br />• area to evaluate incremental and total volumes of deposited <br />tailings will be performed. <br />A measuring device will be installed and maintained in <br />order to monitor the volumes of precipitation and evaporation. <br />This information, combined with a mass and water balance <br />simulation update, will be used in modifying the tailings <br />disposal operations to optimize operating conditions. <br />D.6.7.6.4 Secondary Recovery/Leak Detection System Monitoring <br />The collection pond secondary recovery/leak detection <br />system will be monitored on a monthly basis using a water level <br />indicator. The leak response level for this pond will be the <br />same response levels as those for the heap leach ponds in the <br />approved permit. Any water in the secondary recovery system <br />will be pumped from the system to the pond for recycling to <br />the mill. <br />• D.6.7.6.5 Reoortina <br />All data collected will be reviewed by site personnel <br />who will compare and evaluate the recorded data for <br />determination of the performance of the tailings disposal area. <br />When significant variation from anticipated performance is <br />detected, the site personnel will notify the design engineer <br />who will establish whether modifications to the design or <br />alternative operations measures are required. Reports of the <br />results of all testing will be maintained on site. <br />• <br />D-59 <br />