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2019 GROUNDWATER MONITORING REPORT RECEIVED <br /> MAY Q 12019 <br /> DIVISION OF RECLAMATION <br /> CONTENTS MININGAND SAFETY <br /> Acronyms and Abbreviations .. . ..... ..................... ..... .... .. <br /> 1 Introduction.. ... .. .. ... . . ........ ..................... ...... ...... ... ..... ............. ..... ... .... ........ 1 <br /> 1.1 Site Location.. ... ....... . .. ...................... ... .. .... .. .... .. ........................ . ....... 1 <br /> 1.2 Site History.. .. .. . . ..... ............ ........ .. ... ... .. ...................... ... . .. .. .. 1 <br /> 1 3 Site Regulatory History.. ...... . .... .. ... . .. ............. ... . .. ...I. ..... .. ...... ........2 <br /> 1 31 Baseline Groundwater Monitoring Program. . ......................... . . . 2 <br /> ' 1.3.2 November 21, 2008 Groundwater Monitoring Plan . ... .. .... ......... ............3 <br /> 1.3.3 February 17, 2009 Groundwater Monitoring Plan . .. .... ............. .... . . ..... 3 <br /> 1 3.4 July 7, 2010 Groundwater Monitoring Plan. . ... . ... .... .... ......... ..... . ... .. .... 4 <br /> 1.3.5 October 17, 2014 Proposal to Remove Sodium as a Groundwater Quality Parameter 4 <br /> ' 2 Groundwater Sampling Activities . ... . ...... ................. ..... ...................... .. . ..5 <br /> 3 Results ..... . ................. . . . .. .. . ............ ... .. .. .. .. . .. . ...... ..........6 <br /> 3.1 Groundwater Elevations and Flow Characteristics .. ... .. ... . ................. ... ... . . ... .6 <br /> 3.2 Analytical Results.............. .......... .... .. ...... .. ............ ...... .... .. ..1 ............... .....6 <br /> ' 4 Conclusions and recommendations . ... ........... ..... . ... ....... . ............ ... .... .... ..... .. ..8 <br /> 5 References .. .. . . .. .... .... ....... . .... . ... ... ....................... ... .........9 <br /> ' TABLES <br /> Table 1 March 2019 Depth to Groundwater Measurements and Groundwater Elevations <br /> Table 2 March 2019 Field and Analytical Results <br /> FIGURES <br /> ' Figure 1 Site Location Map <br /> Figure 2 Groundwater Contour Map <br /> ' Figure 3 Potassium to Sodium Ratio Time Series Graph <br /> Figure 4 Total Dissolved Solids Time Series Graph <br /> Figure 5 Sulfate Time Series Graph <br /> ' arcadis com ES-1 <br />