2014-11-14_PERMIT FILE - M2014043 (3)

Home Browse Search

Albert Frei & Sons, Inc. Hatchery Pit Page 3 Permit # M- 2014 -043 elevation and /or greater than two (2) foot below the lowest elevation measured. As more data accumulates the trigger eleva- tion may have to be adjusted if a pattern develops showing the original data was an anomaly due to a dry or wet year. The possibility of adjusting the baseline ranges if needed in the future will be discussed between the Division and the operator at that time. The baseline range changes would be documented with a Technical Revision. If the groundwater levels in a monitoring well pass their trigger points for more than 3 months in a row, the operator will inves- tigate to determine causes, and do mitigation as necessary. The operator will notify the Division of the trigger investigations and any subsequent mitigation. A neighbor complaint could also be a "trigger ". Examples of possible issues are: water well levels low, flooding fields, and vegetation suffering. Albert Frei & Sons would investigate to determine causes and mitigate if necessary as needed following the mitigation plan outlined below. Mitigation Plan. If the trigger is reached based on data collected, the following actions should be undertaken: • An evaluation of the data to confirm that Albert Frei & Sons, Inc. (Frei) is responsible for the change should be completed. • Implementation of mitigation measures. Mitigation measures that could be implemented (not necessarily in the order listed) include: Up Gradient Mitigation • Construction of a pipe or surface groundwater diversion drain to stabilize groundwater levels close to historic elevation. Such a drain or pipe could be constructed along the south and east sides of the mine paralleling the slurry walls where it would convey water from the up- gradient side of the operation to the down gradient side. 3