2018-05-18_HYDROLOGY - M1977344

• Permit No: M1977344
• IBM Index Class Name: Hydrology
• Doc Date: 5/18/2018
• Doc Name: Water Monitoring - Groundwater
• From: Arcadis
• To: DRMS
• Email Name: TC1
• Email Name: WHE
• Media Type: D
• Archive: No

2018 GROUNDWATER MONITORING REPORT
arcadis.com ES-1
CONTENTS
Acronyms and Abbreviations ..........................................................................................................................
1 Introduction ............................................................................................................................................. 1
1.1 Site Location ................................................................................................................................... 1
1.2 Site History ..................................................................................................................................... 1
1.3 Site Regulatory History ................................................................................................................... 2
1.3.1 Baseline Groundwater Monitoring Program ........................................................................ 2
1.3.2 November 21, 2008 Groundwater Monitoring Plan ............................................................ 3
1.3.3 February 17, 2009 Groundwater Monitoring Plan ............................................................... 3
1.3.4 July 7, 2010 Groundwater Monitoring Plan ......................................................................... 4
1.3.5 October 17, 2014 Proposal to Remove Sodium as a Groundwater Quality Parameter ..... 4
2 Groundwater Sampling Activities ............................................................................................................ 5
3 Results .................................................................................................................................................... 6
3.1 Groundwater Elevations and Flow Characteristics ........................................................................ 6
3.2 Analytical Results ........................................................................................................................... 6
4 Conclusions and recommendations ....................................................................................................... 8
5 References ............................................................................................................................................. 9

TABLES
Table 1 March 2018 Depth to Groundwater Measurements and Groundwater Elevations
Table 2 March 2018 Field and Analytical Results

FIGURES
Figure 1 Site Location Map
Figure 2 Groundwater Contour Map
Figure 3 Potassium to Sodium Ratio Time Series Graph
Figure 4 Total Dissolved Solids Time Series Graph
Figure 5 Sulfate Time Series Graph