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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division <br />Rationale - Page 23, Permit No. CO 0000906 pon a. Hydrological Connection Study. Due to the pot entia a included for them the various of a s udy. ultimately result in <br />the discharge to surface water, a compliance schedule Permit Citation Due Date <br />Code Event Description <br />34099 Submit Study Plan Submit a draft Hydrological Connection An meysis thods Study Plan. b he Part I.A.3. 04130109 <br />study plan must identify the procedures used to determine the pathways of process water seepage from the <br />ponds along the Middle Fork of the Purgatoire River, specifically <br />Ponds 1, 4, 6, 7 and 8 and their potential confluence with the <br />Middle Fork of the Purgatoire River. <br />Part TA. 3. 06130109 <br />21599 Special Study Begin implementation of the Hydrological Connection Analysis <br />Study. <br />he absence ct a n Analysis Part I.A.3. 12131109 <br />21699 Submit Stream Submit conclusive results t of the Hydrological <br />Study Study that demonstrate presence hydrological connection between seepage from Ponds 1, 4, 6, 7 and <br />8 and surface water. <br />If the results of the Hydrological Connection Analysis Study <br />indicate that that seepage through the ponds does not enter the <br />surface water, then no further requirements apply once the <br />conclusive results are submitted. <br />If the results of'the approved Hydrological Connection Analysis <br />Study indicate that ground water seepage is discharged to surface <br />• water via a hydrological connection or if the facilityfails to conduct <br />a conclusive study, along with the study results, the facility must, <br />also by December 31, 2009 (1) submit an implementation plan <br />which includes milestones for the completion of necessary actions <br />(e.g., lining of the ponds, development of an alternate monitoring <br />point) to ensure that discharge to surface waters, both in terms of <br />volume and characteristics, are monitored and reported; and (2) <br />request a permit modification to reflect the implementation plan <br />proposed for the appropriate action(s) (e.g., installing pond liners). <br />0