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completed DMRs forms or a letter identifying the State of Federal government official with <br /> whom the reporting form was filed to meet NPDES permit requirements and the date of filing. <br /> Please submit the required documentation to DRMS within 30 days on or before 1 Apri12021, <br /> for the DMRs due in 2020. <br /> a) All missing DMRs were submitted in December 2021 to DMRS through Laserfiche. <br /> Rule 2.05.6(3):Protection ofHydrologic Balance Groundwater <br /> 15. Please indicate if inflow monitoring is still occurring, and if not please explain. <br /> a) Inflow monitoring is no longer occurring. There is no access inside the mine to <br /> monitor inflow. The mine is completely sealed and is no longer being dewatered, <br /> therefore the entries are mostly flooded. <br /> Rule 4.05.130): Ground Water Monitoring <br /> 16. Please provide the missing data for well AVF-6, as outlined in the permit monitoring <br /> requirements. Also, assure going forward that the monitoring information is provided in future <br /> AHRs. <br /> a) Monitoring for AVF-6 was not able to be conducted during the 1st quarter 2019 due to <br /> a blockage in the monitoring well. Reclamation was ongoing during this time and it <br /> was thought that the well may have been damaged.When the 2nd quarter sampling was <br /> conducted the well was able to be sampled and no samples have been missed since. <br /> MCM believes that the monitoring well may have been blocked by ice in the 1st <br /> quarter of 2019. <br /> 17. The sampling frequency discrepancy of alluvial wells AVF-3, 5 and 6 should be researched and <br /> corrected as needed. Please resolve these discrepancies with revised pages updating the <br /> necessary text and associated tables. <br /> a) The sampling frequency for AVF-3, 5, and 6 is quarterly. Except for the 1st quarter of <br /> 2019 all of the wells have been sampled and monitored on a quarterly basis. <br /> 18. MCM needs to determine if the YAW alluvial wells need to be sampled or not. Please resolve <br /> this discrepancy in these tables with revised pages. <br /> a) The YAW alluvial wells were permitted to monitor the Yampa River Alluvium during <br /> the development of the North Mains Mining District. The mine shut down before <br /> reaching the monitoring area and therefore the wells have never been monitored. There <br /> is baseline information for the wells,but no further monitoring has been conducted. <br /> 19. Please correct the AHR Table I for future submissions. <br /> a) Table 1B remains correct and current. <br /> 20. Please provide the missing data as outlined in the permit monitoring requirements or a <br /> discussion of why these wells were not sampled. <br /> a) MCM has no data for the YAW wells since mining never reached the area and <br /> sampling was never implemented. <br /> 21. Please resolve this discrepancy in Table 3B of the permit with revised pages and assure <br /> correspondence with future AHRs. Also,please update Exhibit 29 as necessary. <br /> a) Table 3B of the AHR will be updates in future submittals to reflect the same as Table <br /> 8 in Exhibit 29. <br /> 22. Please provide the missing data for groundwater well no. 5 as outlined in the permit monitoring <br /> requirements. <br /> a) The power at the site was disconnected in 2013.Well No. 5 is the mine discharge well <br /> that was pumped to the surface and discharged under the NPDES permit. The pump <br /> and cables are still in the casing and therefore with out power a sample can not be <br /> collected. MCM will be submitting a revision to address wells that will no longer be <br /> sampled. <br /> 3 1 P a g e <br />