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Ms. Patrioiai Nelson <br />Date_7~/~ ~ `f'~~ <br />Discharge <br />Poi t <br />Ll^ 1 301 <br />Q(~ 3az- Parameter(s) <br />Exceeding Limitation <br />7-s ~ ~ ~, <br />Ts S / ~ <br />Discharge Rate (cfs) <br />~. 2`~~ <br />~o~ ~ <br />Dat <br />s~ 5~~ <br />~~ <br />Co ~ .30 ~ <br /> <br />DD .~ 3c~ S ~ <br />~Ts S <br />75 S s~~ <br />~ s~ <br />~U <br />c~. l 3 7 <br />C . 0 3 ~ // <br /> <br />`r <br />Exceedance of applicable permit effluent limitations <br />resulted from: <br />Discharge from snowmelt runoff occurring within 48 hours <br />after runoff inflows to the pond(s) have stopped <br />(] Discharge from rainfall runoff occurring within 48 hours <br />after measurable precipitation has stopped <br />Documentation of precipitation and snowmelt occurrence <br />and snowmelt inflows to the ponds is retained at the minesite and <br />is available for inspection by authorized agency representatives. <br />Copies of relevant temperature/precipitation data are attached for <br />reference. <br />All sedimentation ponds are designed to contain the full <br />design runoff volume resulting from a 10 year, 24 hour storm event. <br />Stormwater storage capacity is in addition to design sediment <br />storage and any permanent storage capacity. Rerr inspects all <br />sedimentation ponds on a quarterly basis. Inspections include <br />evaluation of accumulated sediment levels relative to design <br />sediment storage capacity to verify that design stormwater storage <br />capacity is maintained at all times. If inspections indicate that <br />sediment accumulations are at or near the design sediment level, <br />Kerr removes accumulated sediment from the pond(s) within a <br />reasonable period (typically 30 to 60 days) following the <br />inspection. Both pond inspection reports and documentation of pond <br />clean-out are retained at the minesite and are available for <br />inspection by authorized agency representatives. Based on direct <br />observation of pond storage levels at the time discharge occurred, <br />the discharge resulted from: <br />Rainfall or snowmelt runoff volumes less than or equal <br />to the design 10 year, 24 hour storage volume <br />(] Rainfall or snowmelt runoff volumes greater than the <br />design 10 year, 24 hour storage volume <br />