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MClimax Molybdenum Table 1 e 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 /L as Fe /L as Mn /L as Se /L as Zn S/cm Standard Units m /L MNGW-1 6/7/2017 930 Accutest <9 2 1 9 <0 42 15.0 2074 63 724 MNGW-1 8/7/2017 1325 Accutest <9.2 21 0.52 151 161 7 64 594 MNGW-1 11/30/2017 11 00 Accutest 614 14 <0 42 278 300.4 62 1130 MNGW-1 5/22/2018 10.29 Accutest <9 2 1 1 <0 42 19.2 2485 63 81.3 MNGW-1 1 8/15/2018 11 30 Accutest <9.2 2.5 <0.42 188 1944 62 66.9 MNGW-1 12/12/2018 1211 Accutest 230.0 1.9 <0 42 387 368.8 6.5 1440 MNGW-1 5/20/2019 1137 ACZ <5 19.7 <0 10 190 2573 60 744 MNGW-1 8/20/2019 11,04 ACZ 70 171 <0.10 240 1999 59 738 MNGW-1 12/3/2019 10:40 ACZ 23.0 143.0 <0 10 44.0 3043 62 820 MNGW-1 5/14/2020 1050 ACZ <7 09 <0.10 160 2673 63 791 MNGW-1 8/20/2020 11 00 ACZ <7 <0 4 <0 10 160 1955 60 7.2 MNGW-1 12/14/2020 958 ACZ <7 120 <0 10 48.2 3705 62 1370 MNGW-1 6/2/2021 10 46 ACZ <7 04 <0 10 228 240.3 63 71 9 MNGW-1 8/13/2021 1144 ACZ <7 05 <0 10 19.6 213.2 62 69.4 MNGW-1 11/30/2021 13-03 ACZ <7 68 <0 10 499 3198 63 120.0 Numeric Protection Limit(NPL) 5,000 790 20 2,000 N/A(report) 6.5-8.5 N/A(report) Location Sample Sample Analytical Iron,Dissolved' Manganese,Dissolved Selenium,Dissolved Zinc,Dissolved Specific Conductivity pH3 Sulfate Date Time Laboratory /L as Fe /L as Mn /L as Se /L as Zn (PS/CM) Standard Units m /L BG-20 6f7/2017 1335 Accutest 492 4.5 <0 42 16.9 370 7 1 5.4 BG-20 8/7/2017 1545 Accutest <9.2 20 <0 42 102 51 6 73 109 BG-20 11/30/2017 1255 Accutest 194 1 8 <0 42 136 71 3 71 15.6 BG-20 5/22/2018 11 17 Accutest <9 2 20 <0 42 198 436 6.8 63 BG-20 8/15/2018 1320 Accutest <9 2 30 <0 42 120 65.3 72 144 BG-20 12/12/2018 10,45 Accutest 534 1 9 <0 42 11.1 775 76 16.7 BG-20 5/20/2019 1515 ACZ 260 76 <0 10 180 801 70 12.5 BG-20 8/20/2019 1250 ACZ <5 0 1.5 <0 10 90 588 7.0 12.7 BG-20 12/3/2019 1245 ACZ <5 0 114 <0 10 130 843 6.8 15.8 BG-20 5/14/2020 1230 ACZ 48.0 59 <0.10 170 632 74 11.9 BG-20 8/18/2020 1225 ACZ <7 1.7 <0 10 80 639 74 118 BG-20 12/14/2020 11:17 ACZ <7 24 <0 10 110 782 75 22 1 BG-20 6/14/2021 9,15 ACZ 129 1 1 <0 10 183 36.9 8.0 10.2 BG-20 8/13/2021 1235 ACZ <7 1.4 <0 10 9.3 691 7.3 142 BG-20 12/1/2021 1210 ACZ <7 1 1 <0 10 154 784 6.5 196 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 3Analyzed 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 momtonng