Laserfiche WebLink
I which subbasin is experiencing the increase-, <br /> 2 the nature of the ongoing remediation activities in the affected basin(s), <br /> and <br /> 3. known activities not related to mine closure taking place in the affected <br /> basin. <br /> If the increase is related to mine closure, SGC will specify the actions and time <br /> table to be implemented to reverse the trend. <br /> If the moving average index number of the most recent 12-month period exceeds <br /> a value of+0.577 (representing the upper value of the range of normalized <br /> residual values expected in a twelve-period sample at a confidence level of 97.5% <br /> around the mean computed on a flow class - by - flow class basis), SGC will meet <br /> with WQCD to discuss the data and determine what, if any action is required. <br /> The initial action, if any is deemed necessary, will be for SGC to investigate <br /> possible causes of the elevated Zn values. If the cause is related to the sealing of <br /> the mine or due to mitigation projects, SGC will respond either by increased <br /> treatment of Cement Creek,adjustment of the water elevation of the thine pool. or <br /> implementation of the "B" list of projects. If the "B" list of projects already has <br /> been completed, SGC may add additional mitigation projects under Paragraph— <br /> Should new, adverse effects on dissolved Zn values in the Upper Animas Basin <br /> occur through man-made or natural causes that are not caused by closure activities <br /> of the Sunnyside Mine or mitigation activities carried out by SGC under this <br /> Agreement, SGC will document and monitor the causes and their effects so that a <br /> mathematical adjustment can be made to the observational data at A72 prior to <br /> using the information in statistical analyses of water quality. <br /> A=4 Method of Evaluating Water Quality with Respect to Reference Conditions - Post Project <br /> Period <br /> (a) During the Post-Project Period, SGC will collect at least 13 samples during the low-flow <br /> class and 12 samples in each of the medium and high-flow classes, subject to the <br /> following conditions: <br /> The sample interval shall be >_ seven (7) days; <br /> 71311-1.2112,96 4 a <br />