2023-06-05_HYDROLOGY - M1977342

• Permit No: M1977342
• IBM Index Class Name: Hydrology
• Doc Date: 6/5/2023
• Doc Name: Water Monitoring - Groundwater
• From: Clmax Molydenum
• To: DRMS
• Email Name: PSH
• Email Name: JLE
• Media Type: D
• Archive: No

C/imaxMoll/bdenum Table 1
o I' Annual Water Monitoring Data
A Freeport-McMoRan Company Henderson Mine
Location Sample Sample Analytical Iron,Dissolved' Manganese,Dissolved Selenium,Dissolved Zinc,Dissolved Specific Conductivity' PH Sulfate'
Date Time Laboratory (pg/L as Fe) (µg/L as Mn) (µg/L as Se) (µg/L as Zn) (µS/cm (Standard Units) (mg/L)
CC-10 5/22/2018 1202 Accutest 29.1 11.4 <0.42 28.1 29.1 6.1 3.6
CC-10 8/15/2018 1252 Accutest <92 41.1 <0.42 12.1 46.4 6.9 5.5
CC-10 12/12/2018 1015 Accutest 46.8 2.7 <0.42 12.9 63.8 7.8 9.2
CC-10 5/20/2019 14:45 ACZ 236 22.8 <0.10 67 64 6.4 14.8
CC-10 8/20/2019 12:25 ACZ 11 2.3 <0.10 8 38.6 7.0 4.9
CC-10 12/3/2019 11:35 ACZ 10 4.8 <0.10 13 69.7 6.6 9
CC-10 5/14/2020 12:00 ACZ 363 34.5 <0.10 80 51.8 7.2 9.6
CC-10 8/18/2020 1158 ACZ <7 1.7 <0.10 6 46.3 7.5 4.4
CC-10 12/14/2020 1038 ACZ 9 15.9 <0.10 16.4 71.3 7.34 17.2
CC-10 6/14/2021 950 ACZ 31 2.94 <0.10 <6 23.8 7.5 2.8
E
8/13/2021 13:20 ACZ 10.2 1.47 <0.10 8.1 44.2 7.6 <1
12/1/2021 13:50 ACZ 13.8 5 <0.10 18.8 62.5 7.2 8.2
5/24/2022 12:40 ACZ 43.2 7.69 <0.10 22.8 29.7 6.8 4.6
8/15/2022 11:54 ACZ 22, 272 <0.10 9.1 4D.1 6.7 5.112/12/2022 9:45 ACZ 16.6 2.01 <0.10 18.1 57.8 7.0 8.3
Location Sample Sample Analytical Iron,Dissolved' Manganese,Dissolved' Selenium,Dissolved Zinc,Dissolved Specific Conductivity3 PH Sulfate"
Date Time Laboratory (µg/L as Fe) (µg/L as Mn) (µg/L as Se) (µg/L as Zn) (PS/cm) (Standard Units) (mglL)
CC-30 5/22/2018 12:28 Accutest 30 160 <0.42 79.3 62.5 6.6 11.2
CC-30 8/15/2018 13:35 Accutest <92 152 <0.42 62.2 100.3 7.1 20.3
CC-30 12/12/2D18 1325 Accutest 133 133 <0.42 59.7 131.5 6.5 25.3
CC-30 1 5/20/2019 15:45 ACZ 80 424 <0.10 178 171.6 7.1 27.5
CC-30 8/20/2019 11:50 ACZ 22 114 <0.10 52 73.6 6.6 13.7
CC-30 12/3/2019 13:15 ACZ 12 141 <0.10 66 123.0 6.7 18.8
CC-30 5/14/2020 11:30 ACZ 214 334 <0.10 167 140.9 7.2 25.4
CC-30 8/18/2020 11:20 ACZ 19 132 <0.10 60 87.5 7.2 16.3
CC-30 12/14/2020 11:53 ACZ 10 142 <0.10 77 118.7 7.3 25.6
CC-30 6/14/2021 1035 ACZ 37.1 153 <0.10 56.3 40.7 6.9 21
CC-30 8/13/2021 14:25 ACZ 31.1 192 <0.10 75.6 99.9 7.6 18.8
CC-30 12/l/2021 13:15 ACZ 25.6 1 <0.10 90 116.5 6.9 20.8
CC-30 5/24/2022 I--T2-.ioI ACZ 54.6 1 218 <0.10 102 67.8 6.8 14.8
CC-30 8/15/2022 12:50 ACZ 37.7 206 <0.10 83.3 96.6 7.2 19.2
CC-30 12/12/2022 10:41 ACZ 20 306 <0.10 137 124.6 7.0 28.2
Notes:
RED=Resulting concentration falls outside of the Numeric Protection Limit(NPL). <=not detected at concentrations exceeding the laboratory method detection limit
BLUE=Rosner/Dixon Statistical outlier mg/L=milligrams per liter
'Analyzed by EPA Method 200.7 or 200.8. pg/L=micrograms per liter
Analyzed by EPA Method 200.8. pS/cm=micro Siemens per centimeter
Analyzed using field instrumentation. EPA=Environmental Protection Agency
°Analyzed by EPA Method 300.0. (Blank Field)=No data was required for this parameter during monthly pH assessment monitoring