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<br />7.7.7.2Cooperators <br /> <br />Well contractor <br />7.7.7.3Time Frame <br /> <br />Next scheduled maintenance of Well 1 <br />7.7.7.4Estimated Cost <br /> <br />Approximately $10,000 to $15,000. The actual cost will depend on the level of effort required to determine <br />if the casing is compromised. <br />7.7.7.5Goals Achieved <br /> <br />Determining if the Well 1 casing is compromised and providing a pathway that allows for relatively rapid <br />movement of water from the surface to the source water aquifers. <br />Success criterion: Evaluation of the Well 6 casing on the schedule outlined in section 7.7.7.3. <br />NOTE TO CITY REVIEWERS: In the Part 1 <br />Commented \[JG2\]: <br />WHPP amendment the MDH noted that the tritium <br />concentration in samples from Well 1 rose from 1.6 in 2006 to <br />2.4 in 2017. Increasing tritium concentration (assuming there <br />were no problems with the analyses) could indicate the casing <br />is compromised. If maintenance has not been done on Well 1 <br />(including a video inspect <br />since the 2017 tritium sampling I would recommend this be <br />done. Including this management action would allow you to <br />apply for a Source Water Implementation Grant from MDH to <br />help pay for the Well maintenance. If this work has been done <br />since 2017 and no holes were found in the casing then I would <br />recommend not including this management action. <br /> <br /> <br /> 38 <br /> <br />38 <br /> <br />