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significantly impact how this material is handled and disposed, and substantially increase the disposal <br />costs for the impacted water systems. Therefore, this situation should be addressed as quickly as possible. <br />Summary <br />The WQCD finds the overall approach and schedule submitted by Cotter to be unacceptable. The <br />suggested approach does not clearly demonstrate that the proposed remedy will result in attainment of <br />water quality standards. Furthermore, given the drinking water concerns enumerated above, this situation <br />needs to be addressed as quickly as possible in 2010. Remedial action needs to begin immediately. The <br />WQCD understands that additional sampling may be needed to better understand the situation and then <br />design a permanent solution. However, if a permanent solution cannot be implemented in a very short <br />time frame, then an interim solution, such as pumping and treating as much contaminated water as <br />possible, should be launched immediately. <br />Water quality data for Ralston Creek at the Long Lake Headgate was assessed using data from 1/25/05 to <br />3/10/10. The 85`h percentile of the data was a uranium concentration of 307 ug/I (the uranium water quality <br />standard is 30 ug/1).