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<br />Appendix VI <br />MONITORING RESPONSES <br />• <br />The information presented below incorporates updated criteria for .responding to .situations which <br />demonstrate significant changes from previous results. The situations outlined below are those <br />which require further action. ' <br />a) Underdrains: The 30-day running average of CNWADt for an underdrain exceeds 1.0 <br />mg/1 and the 30-day running average pH value for the same underdrain for the same <br />period exceeds 9.0; <br />b) LDS: The 30-day running average of CNWAD' for a LDS exceeds 0.5 mg/1 and the 30- <br />day running average pH value for the same LDS for the same period exceeds 9.0; <br />c) HVSCS: The average of the water level readings in the PSSAs exceeds 80 percent of the <br />total capacity in a sustained manner; <br />d) LVSCS, LDCRS: The transducers in the LVSCS or LDCRS exceed two feet in a <br />sustained manner; <br />e) OLS: The head above the Phase I and II OLS is sustained at greater than two feet on a <br />sustained basis; <br />1CNWAD concentrations must be accompanied by a commensurate level of CNFree• Irl <br />addition, the CNFree concentration in any sample must exceed 0.2 mg/1. <br />• <br />The first response to any of the conditions listed above will be to verify that the measurements <br />are accurate. This may involve re-sampling or revisiting the monitoring location to confirm the <br />initial results. In the event that initial results are confirmed, verbal notice will be provided to the <br />DMG. Recommendations will be provided to the DMG regarding further analysis of the <br />situation and, if warranted,,appropriate corrective actions. This may include, but not be limited <br />to, providing a written plan to DMG regarding proposed measures for addressing the situation, <br />changing flow rates to the various portions of the VLF, discontinuing the addition of CN or <br />make-up water, initiating detoxification operations, or other appropriate responses. <br />Revision No Revision Date ~ B Whom Review Date Descri tion <br />O1 September <br />25,2006 P. Roberts September 25, <br />2007 Initial release of <br />document <br />02 February 12, <br />2007 G. Goodrich May 2007 Plan Updates <br />03 Januar ' 8, 2008 P Roberts Ma -2008 Re lace RWL w/LN <br />Cyanide Emergency Response Plan September 25, 2006 <br />EMS: AGANA/CCV Doc.# E-012 <br />S:\4010-00055 CC & V 112(d) Permit Application\ERP, SPCC, FMP\Cyanide Emergency Response Plan.doc Revision 03 <br />- t8- <br />