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

Table E-4
Groundwater Quality Data for Monitoring Wells MW-7, MW-12, and MW-13 2011 through 2021
2021 Groundwater Monitoring Report
Holcim (US) Inc.
Florence, Colorado

Analyte
Field Parameters MW-7
NPLsa
MW-7
DUP MW-12 MW-7 MW-12 MW-12 MW-12
MW-13
NPLsb
pH (std. units)6.5-8.5 7.98 --6.87 7.03 7.60 6.81 --6.95 7.31 7.57 6.80 --7.07 7.55 6.74 --7.02 7.63 6.74 --6.98 NA
Specific Conductivity (mS/cm)NA 1.427 --3.686 3.287 1.7 4.0 --3.7 3.3 3.280 3.899 --3.559 2.792 3.946 --3.673 2.672 3.893 --3.714 NA
Temperature (°C)NA 14.00 --15.80 14.60 14.19 13.96 --14.01 14.70 14.24 13.96 --14.17 14.00 13.60 --14.00 14.20 14.10 --14.10 NA
Total dissolved solids 3918 2760 2740 3970 3180 810 3910 3920 3500 3270 2780 3870 3850 3480 2620 3940 3890 3420 2010 3910 3870 3540 4026
Sulfate 2080 1600 1500 2400 1770 39 2300 2300 2100 1820 1700 2600 2600 2300 1460 2450 2410 1980 1020 2390 2340 2030 2200
Iron (total)4.5 4.28 5.13 Nan Nan 13.8 Nan Nan Nan 9.9 4.26 Nan Nan Nan 3.45 Nan Nan Nan 2.37 Nan Nan Nan NA
Iron (dissolved)NA U 0.07 0.99 U U 0.19 0.10 0.04 B 0.09 B 0.10 0.34 0.32 U 0.04 B 1.14 1.20 U <0.04 U 0.74 0.54 <0.04 U 0.13
Manganese (dissolved)0.88 0.147 0.146 0.551 U U 0.54 0.54 U 0.165 0.03 B 0.50 0.49 U 0.059 0.532 0.549 U <0.01 U 0.550 0.550 <0.01 U 0.3
Potassium (dissolved)17 13.1 13.1 13.8 8.9 5.2 13.6 13.5 8.9 12.3 12.1 12.8 12.0 8.6 12.1 12.5 13 8.2 11 12.6 12.6 8.4 13
Sodium (dissolved) ¹NA 231 232 201 170 258 145 143 203 250 297 162 154 201 253 147 152 181 247 131 130 156 NA
Potassium to Sodium ratio 0.5 0.06 0.07 0.05 0.02 0.09 0.04 0.05 0.04 0.08 0.04 0.05 0.09 0.05 0.04 0.10 0.10 0.05 0.5
Analyte
Field Parameters MW-7
NPLsa MW-12 MW-13
NPLsb
pH (std. units)6.5-8.5 7.08 6.36 --6.54 7.32 6.45 --6.86 7.38 6.58 --6.85 7.86 6.86 --7.01 7.86 6.81 --7.07 NA
Specific Conductivity (mS/cm)NA 2.277 3.849 --3.744 1.257 3.854 --3.288 2.051 3.879 --3.742 2.077 3.872 --4.016 1.324 3.046 --3.355 NA
Temperature (°C)NA 14.94 14.46 --14.05 14.82 14.44 --14.63 14.29 13.88 --13.94 14.60 14.20 --14.30 14.70 14.50 --14.10 NA
Total dissolved solids 3918 994 3940 3940 3800 1120 3730 3790 3170 984 3860 3850 3580 948 3820 3780 3900 944 3830 3830 3300 4026
Sulfate 2080 231 2320 2320 2130 326 2430 2390 1980 121 2300 2320 2070 95 2020 2020 2000 99.9 2140 2170 1920 2200
Iron (total)4.5 8.05 4.9 7.15 8.54 6.05 6.63 4.65 1.53 4.65 7.91 7.4 7.98 9.03 5.55 7.4 12 10.1 10.1 16.1 5.1 NA
Iron (dissolved)NA 0.12 0.39 0.44 0.08 B 0.13 0.43 0.35 0.09 J <0.02 U 0.08 J 0.64 <0.04 U 0.05 0.22 0.26 0.05 J 0.08 U 0.1 J 0.07 J 0.20 U 0.13
Manganese (dissolved)0.88 0.005 B 0.53 0.53 <0.01 U 0.009 J 0.52 0.51 0.01 J <0.005 U 0.53 0.54 <0.01 U 0.03 U 0.56 0.55 0.05 U 0.05 U 0.53 0.53 0.1 U 0.3
Potassium (dissolved)17 7.2 13 13.1 8.7 7.4 12.3 12.1 7.5 7.3 12.5 12.6 8 6.7 13 13.0 8.7 6.5 13 13.1 8.4 13
Sodium (dissolved) ¹NA 230 133 134 186 233 124 122 135 260 128 128 178 259 150 150 242 266 140 141 163 NA
Potassium to Sodium ratio 0.5 0.03 0.10 0.10 0.05 0.032 0.099 0.099 0.056 0.028 0.098 0.098 0.045 0.02587 0.0867 0.087 0.036 0.02 0.09 0.090 0.05 0.5
Analyte
Field Parameters MW-7
NPLsa MW-12 MW-13
NPLsb
pH (std. units)6.5-8.5 7.86 6.92 --7.20 NA
Specific Conductivity (mS/cm)NA 1.544 3.870 --3.533 NA
Temperature (°C)NA 14.3 14.1 --13.8 NA
Total dissolved solids 3918 976 3960 3710 3350 4026
Total suspended solids ----
Sulfate 2080 55.7 2490 2470 2170 2200
Iron (total)4.5 19.6 8.7 8.86 4.6 NA
Iron (dissolved)NA 0.06 U 0.146 0.158 0.06 U 0.13
Manganese (dissolved)0.88 0.01 U 0.489 0.511 0.01 U 0.3
Potassium (dissolved)17 5.6 12.1 12.5 7.84 13
Sodium (dissolved) ¹NA 236 141 146 215 NA
Potassium to Sodium ratio 0.5 0.02 0.09 0.09 0.04 0.5
All units are in mg/L unless noted otherwise.
Bolded values - Screening level exceeded.
¹ - Sodium removed from list of compliance standards in 2015 per Division of Reclamation, Mining and Safety approval letter dated February 25, 2015.
B - Analyte concentration detected at a value between Method Detection Limit and Practical Quantitation Limit.
bkg - Background.
MCL - Maximum concentration limit.
NA - Not applicable
Nan - Not Analyzed
NPLs - numeric protection levels issued by Division of Reclamation, Mining and Safety
U - The analyte was analyzed for, but not detected. Detection limit is numeric value shown.
Multiple screening levels present in some instances due to proposed background standards for MW-7.
aDRMS-approved Numeric Protection Levels for MW-7.
bDRMS-approved Numeric Protection Levels for MW-13.
MW-13
MW-7 MW-12
DUP
Sept-2012
MW-13
March 2021 Analytical Results
MW-13
Laboratory Results
MW-13
March 2011 Analytical Results
MW-7 MW-12 MW-13
March 2012 Analytical Results
March 2018 Analytical Results
March 2013 Analytical Results
MW-7
March 2019 Analytical Results
MW-7
Laboratory Results
MW-12
DUPMW-7 MW-12MW-7
MW-12
DUP
MW-12
DUP MW-13MW-12
DUPMW-12
Notes:
MW-12
DUP MW-13
MW-7 MW-12
DUP
Laboratory Results
MW-7 MW-12
DUP
MW-12
DUP
April 2016 Analytical Results March 2017 Analytical Results
MW-7MW-13 MW-7 MW-12
MW-13MW-13
March 2015 Analytical Results
MW-7 MW-12 MW-13
MW-12
DUP
March 2014 Analytical Results
March 2020 Analytical Results
Historical GW Data_04142021 Page 1 of 1