2024-01-17_REVISION - M2015030

• Permit No: M2015030
• IBM Index Class Name: Revision
• Doc Date: 1/17/2024
• Doc Name: Adequacy Review Response
• From: Asphalt Specialties CO
• To: DRMS
• Type & Sequence: AM2
• Email Name: ECS
• Email Name: MAC
• Media Type: D
• Archive: No

Chavers Mining Resource Table 4
Baseline Groundwater Quality Results
Last Three (3) Quarters of Data
2nd Quarter 2023 - 4th Quarter 2023
Sample Event: 6th Quarter Sampling Event 7th Quarter Sampling Event 8th Quarter Sampling Event
Well Type: BKG Wells(Up-gradient) POC Wells(Down-gradient) BKG Wells(Up-gradient) POC Wells(Downyradient) BKG Wells(Up-gradient) POC Wells(Down-gradient) Lowest Chavers
Ana lyte/Pa ra meters CAS No. Sample ID: MW-2 MW-3 MW-4 MW-4D MW-5 MW_6 fGrab
MW-3 MW-4 MW-5 MW-5D MW-6 MW-2 MW-3 MW-4 MW-5 MW-6 MW-6D INS Tables 1-4 Site-Specific
Date: 6/29/2023 6129/2023 6/29/2023 6/29/2023 6/30/2023 6/30/2023 23 9/26/2023 9126/2023 9126/2023 9/26/2023 9/26/2023 12/14/2023 12/15/2023 12/15/2023 12/1512023 12/15/2023 12/15/2023 Groundwater Groundwater
Type: Grab Grab Grab QAIQC Grab Grab Grab Grab GrabQA/QC Grab Grab Grab Grab Grab Grab QA/QCQuality Standards Quality Standards
Units mg1L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg1L mg/L mg/L mg/L mg/L mg/L
Dissolved
Aluminum 7429-90-5 mg/L 0.007 0.005 0.013 0.014 0.0017 0.022 2.47 0.026 0.022 0.011 0.00]2U
0.003 0.01 0.003 0.002 0.004 0.003 0.003 5 5
Antimony 7440.36-0 mg/L 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.00 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.006 0.006
Arsenic 7440-38-2 mg1L 0.0006 U 0.0006 U 0.0014 0.0011 0.0007 0.0007 0.001 0.0006 U 0.0009 0.001 0.000.0012 0.0006 U 0.0006 U 0.0008 0.0007 0.00" 0.0008 0.01 0.01
Barium 7440-39-3 mWL 0.0932 0.0531 0.0488 0.0473 0.0214 0.063 0.1632 0.0464 0.0737 0.0704 0.070.0704 0.08 0.0586 0.0773 0.0634 0.0695 0.0667 2 2
Beryllium 744041-7 mg/L 0.0001 U 0.0001 U O.OD01 U 0.0001 U D.t0001U 0.0001 U 0.0003 0.0001 U 0.0001 U 0.0001 U 0.00 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.004 0.004
Boron 7440-42-8 mg/L 0.23 0." 0.1 0.1 0.07 0.13 0.2 0.3 0.210.22 0.20.19 0.4 0.36 0.25 0.24 0.25 0.24 0.75 0.75
Cadmium 7440.439 mg/L 0.0001 0.0001 U 0.0001 0.0001 0.0001 U 0.W
002 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 0.0001 U 0.0001 U 0.0003 0.0003 0.0008 0.0006 O.00S 0.005
Chloride 168a7-006 mg/L 178.22 201.83 72.88 73.71 57.76 721 164 160 159 160 158 185 209 185 178 186 195 250 250
Chromium(Total)[Cr(III)+Cr(VI)1 7440.47-3 mg/L 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0. 02 0.0015 U 0.0015 U0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.1 0.1
Cobalt 7440-48-4 mg/L 0.0011 0.0008 0.0003 0.0003 0.0002 U 0. 025 0.0005 0.0003 0.0005 0.0005 0.0004 0.0009 0.0004 0.0006 0.0009 0.0006 0.0006 0.05 0.05
Copper 7440.50-8 mglL 0.0017 0.0016 0.0065 0.0062 0.0021 0. 054 0.00130.0054 0.0028 0.0027 0.0088 0.0011 0.001 0.0077 0.0028 0.0104 0.0708 0.2 0.2
Flouride 16984-48.8 mg/L 1.03 1.32 1 U 1 U 0.76 09 1.58 0.8 0.82 0.89 0.71 0.94 1.25 0.62 0.77 0.77 0.78 2 2
Iron 7439-896 mg/L 0.005 U 0.005 U 0.005 U 0.01 0.016 016 0.007 0.01 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.005 0.014 0.005 0.005 0.3 0.3
Lead 7439-92-1 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0047 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 0.0002 0.0002 0.0002 0..5 2.5
Lithium 7439-93-2 mg/L 0.026 0.024 0.025 0.025 0.013 0.025 0.031 0.03 0.04 0.04 0.04 0.04 0.026 0.029 0.037 0.036 0.036 0.036 2.5 2.5
Manganese 7439.96-5 mglL 0.0062 0.0008 U 0.022 0.0246 0.0028 _ 0.0291 0.397 0.0009 0.0018 0.0015 0.0013 0.0008 U 0.0021 0.0008 U 0.0017 0.0028 0.0017 0.002 0.05 0.397
Molybdenum 4439-98-7 mg/L 0.0096 0.0127 0.0053 0.0053 0.0031 0.0018 0.005 6.0145 0.0066 0.0088 0.0069 0.0077 0.0078 0.0119 0.008 0.006 0.0065 0.0087 0.21 0.21
Nickel 7440-02-0 mg/L 0.0023 0.0024 0.0015 0.0015 0.0009 U 0.0014 0.0042 0.0016 0.0017 0.0023 0.0023 0.0019 0.0022 0.002 0.0023 0.0024 0.0023 0.0023 0.1 0.1
Nitrate(NO3) 14797-55-8 mg/L 2.36 1.76 3.65 3.87 1.24 0.17 3.69 1 1.25 3.04 2.67 2.64 2.98 2.75 1.5 3.89 3.78 3.67 3.65 10 10
Nitrite(NO2) 14797-65-0 mg/L 0.3 U 0.3 U 0.3 U 0.3 U 0.03 U 0.03 U 0.03 Ul 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 1 1
Nitrate-Nitrite,Total(NO2+NO3) mg/L 2.36 1.76 3.85 3.87 1.24 0.17 3.89 1.25 3.04 2.67 2.64 2.88 2.75 1 1.5 3.89 3.78 3.67 3.65 10 10
Selenium 7782-49-2 mg/L 0.0013 0.0013 0.0026 0.0024 O.oDO8 U 0.0008 U 0.0023 0.002 0.0022 0.0018 1 0.0019 0.0024 0.0011 0.0023 0.0018 0.0006 0.0016 0.0017 0.02 0.02
Silver 7440-22-4 mg/L 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0006 U 0.0005 U 0.0005 Ul 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.05 0.05
Sulfate 14808-79-8 MOIL 179.7 243.78 96.66 99.6 59.17 106.25 175 195 18a 190 190 164 170 232 168 167 1.66 167 250 301.12
Thallium 7440-2M mg/L 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.002 0.002
Total Dissolved Solids(TDS) 10.333 mg/L 890 887 427 480 284 545 723 540 628 683 697 Sea 687 am 700 719 768 717 1267.5 1267.5
'
Uranium 744061-1 mg/L 0.0055 0.0157 0.0008 0.0006 0.0029 0.0021 0.0057 0.0088 0.0106 0.0083 0.00" 0.0086 0.0037 0.0156 0.0067 0.0078 0.0089 0.0088 0.03 0.03
Vanadium 744062-2 mg/L 0.001 U 0.001 U 0.002 0.002 0.001 0.001 U 0.004 0.001 U 0.002 0.001 0.001 0.002 0.001 U 0.001 U 0.001 0.001 U 0.001 0.001 0.1 0.1
Zino 744066-G mglL 0.001 U 0.001 U 0.002 0.002 0.003 0.012 0.012 0.001 U 0.001 0.006 0.006 0.003 0.001 U 0.001 U 0.003 0.025 0.009 0.009 2 2
PH - su 7.3 77 7.0 69 7.2 1 65 7.0 7.2 6.8 1 7.4 1 7.4 7.0 7.2 1 7.3 1 7.2 1 7.2 17.2 7.3 6.5-8.5 6.5-8.5
Notes:
=Chavers Site-Specific Groundwater Quality Standard value
=Source of Chavers Slte-Specific Groundwater Quality Standard value
=Background concentration result exceeds lowest applicable INS Tables 1-4 standard
=Highest Background TDS value
Bold =Concentration detected above reporting limit
• =Calculated Value(Per WQCC Regulation No.41,for Background TDS Value between 501-10,000 mg/L,the Maximum Allowable TDS Concentration is 1.25 times the background:value,
BKG =Background
INS =Interim Narrative Standard
mg/L =milligrams per liter
POC =Point of Compliance
su =standard unit
U =Analyte not detected above reporting limit
WOCC =Water Quality Control Commission