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J <br />~ y ~~~oa ieµ f/~ ~P ~8~ ~ der-t~~ <br />2.05.6(3)(b)(10) PROTECTION OF THE HYDROLOGIC BALANCE <br />• <br />DIVISION CONCERNS <br />The Division has requested that a "spring and seep" survey be <br />performed on an annual basis in order to evaluate the development of a <br />spoils aquifer at the mine. <br />A "spring and seep" monitoring and mitigation plan was submitted <br />to the Division on August 8, 1986. The Division's letter of September 3, <br />1986 requested some modifications to our submittal. The following plan <br />revises our original plan as well as incorporating the Division's concerns. <br />RESPONSE <br />Monitoring <br />Between April 1 and May 15 of every year, a "spring and seep" <br />monitoring plan will be implemented on the reclaimed areas. <br />For springs having a flow greater than 75 gpm, the following <br />analysis will be completed quarterly. <br />pH (field) <br />Conductivity at 250C (field) <br />• Temperature (field) <br />Total Dissolved Solids <br />Sodium Adsorption Ratio <br />~ Bicarbonate (HCO-3) <br />/Calcium <br />~ Fluoride <br />'~ vMagnesium <br />"` Cadmium <br />Mercury <br />Zinc <br />Flow <br />`~ Artonon i a <br />/ Nitrate <br />,/ Sodium <br />/ Sulfate <br />Aluminum <br />,~ Boron <br />/ Copper <br />/ Iron <br />/ Lead <br />/ Manganese <br />Molybdenum <br />Selenium <br />b~ <br />~ d161~~ <br />In addition, these springs will be sampled monthly for the field <br />parameters pH, conductivity, temperature and estimate of flow. <br />If no flow exceeds 75 gpm, an annual full suite analysis for the <br />single largest spring will be completed. <br />A map showing the location of the springs will be submitted in <br />the annual report. <br />Mitigation plan <br />The first step in the mitigation plan will be an evaluation of <br />the environmental effects of each spring. Additional action will be taken <br />only if it is determined that there is sufficient potential environmental <br />• harm from the effects of a suspect spring or seep to warrant further <br />action. Examples of environmental harm could include excessive erosion, <br />significant degradation of topsoil, etc. <br />Revised November, 1986 <br />