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~~ <br /> <br />Phase 4 monitoring program: Piezometers will be monitored monthly with [he exception of <br />piezometer P7. Piezometer P7 will be monitored daily during the initial dewatering of Phase 4 <br />until the dewatering program for Phase 4 has been established. <br />Phase 5 <br />Phase 5 dewatering: During Phase 5 groundwater will be diverted via pit dewatering and/or the <br />groundwater collection trench to the dewatering silt pond and then gravity fed to the west <br />recharge pond. If the capacity of the recharge ponds are being exceeded groundwater will also <br />be diverted to the Boxelder Ditch. <br />Phase 5 monitoring program: <br />1. Piezometers will be monitored monthly. <br />2. A staff gauge will be installed in east recharge pond and the water level will be recorded <br />monthly along with the piezometer and west recharge readings. <br />3. A measuring device will be installed during Phase 2 on the trench system diverting water into <br />the west recharge pond to measure the quantity of water being diverted into the recharge <br />pond. Flows to be measured monthly. <br />4. The monitoring program during this phase will be specifically aimed at identifying any <br />problems with the recharge capacity of the east and west recharge ponds. The monitoring <br />program for evaluating the west recharge pond, as described above, will be continued. The <br />monitoring program for the east recharge pond is as follows: <br />a) A relationship will be established during the first three months of operation in Phase 5 <br />between 1) the water level in the east recharge pond and the water level in piezometer P7. <br />Example: if during the first three months the water levels in east recharge pond range <br />from 0.5-0.8 feet higher than the water level in piezometer P7 the largest elevation <br />difference during the three months, 0.8 feet, will become the recorded elevation <br />difference (RED) between the east recharge pond and piezometer P7. <br />b) A maximum elevation difference (MED) between the east recharge pond and piezometer <br />P7 will be calculated as the (RED) plus 1.0 feet. If the (MED) is exceeded DMG will be <br />notified. (example: continuing the example from item 4a., if the elevation difference <br />between the east recharge pond and piezometer P7exceeds 1.8 feet (1.0 +0.8), DMG will <br />be notified). <br />c) After DMG has been notified, Connell Resources will review records from all nine <br />monitoring wells and submit a report to DMG within 30 days. The report will present an <br />analysis of the groundwater elevation drop and a mitigation plan to restore the <br />groundwater recharge to conditions present at the beginning of Phase 5. <br />Phase 6 <br />Phase 6 dewatering: Very limited dewatering will be required during phase 6 of the mining plan <br />because the pit will be lined and groundwater seepage into the pit will be essentially eliminated. <br />