2021-05-06_HYDROLOGY - M1977344

• Permit No: M1977344
• IBM Index Class Name: Hydrology
• Doc Date: 5/6/2021
• Doc Name: Water Monitoring - Groundwater
• From: Arcadis
• To: DRMS
• Email Name: TC1
• Email Name: MAC
• Media Type: D
• Archive: No

2021 Groundwater Monitoring Report
www.arcadis.com
2021 Holcim FINAL GWMR i
Contents
Acronyms and Abbreviations ................................................................................................................................ iii
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 2021 Depth to Groundwater Measurements and Groundwater Elevations
Table 2 March 2021 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
Figure 6 Manganese Time Series Graph