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~ ~ i <br />' (1) Install two ground water monitoring wells northwest and southwest of the tailings <br />' facility and the collection pond to evaluate the magnitude and direction of the <br />ground water gradient and to develop local hydraulic characteristics. <br /> <br /> (2) Use aquifer hydraulic characteristic data obtained from the wells described in (1) <br /> above, to evaluate what well configuration and pumping rates would be necessary <br /> to control the ground water gradient, should a containment and retuediation plan <br />I' need to be implemented. <br />- -~ <br /> ~, ~, , <br />~,.~~~ . <br /> ~;'r-~~•`r`~ (3) <br />- Install the necessary wells to be able to control the hydraulic gradient <br /> ' e <br />M~_ <br />„~~ ~C . <br />downgradient of the tailings facility and collection pond. <br /> <br /> 5,` <br /> (4) If ground water contamination occurs, pump contaminated water frpm these wells <br />' into the water system for delivery back to the detoxification system at the plant. <br /> <br />' (5) If surface flow contamination occurs, berm the channel to collect the surface flow <br /> ,~ ~'~ behind the berm. Detoxify the water captured in accordance with Section 9. l of - ~~' <br />' ~ ~,~~ ~ `' ~. '' the Emergency Response Plan that was approved as part of Appendix M of ~ ~ <br />• <br />; ~~ <br /> i ~ ' ~ ~ ~` ~ ~ CMLRB Permit No. M-88-112. Pump downgradient interceptor wells, as ~ <br />-jm`t; ~' <br />• <br /> <br />~. ~`~~,, <br />necessary, and pump discharge back to the detoxification process. ,.a~ <br />r <br />"~(~41'r <br /> ~. <br />1 (6) If soil contamination occurs due to infiltration and percolation of ,surface flow, <br />soil samples will be taken. Following sample analysis, appropriate measures will <br />~ (7) For any discharge, monitor water quality to evaluate the duration of pumping that <br />' would be necessary.:"~ ' •, ~ ~" t ''r (`• •c >'` ~ ~ ~' ^ "t <br /> <br />' -4- <br /> <br />