Laserfiche WebLink
The Leadville Mill M 1990-057 <br /> EXHIBIT U-DMO-EPP <br /> Page 14-19 <br /> LEADVILLE MILL GROUNDWATER <br /> Two monitoring wells were permitted and constructed in 2014 per M1990-057 <br /> Amendment 1 requirement. Quarterly quality data are shown in Appendix 14-8 and <br /> summarized in Table 14-7. <br /> Monitoring well, MW-2 is the Leadville Mill's water quality point of compliance) <br /> located down gradient whereas MW-3 is background water quality well located <br /> upgradient from the mill. See Figure 6.2 for location. <br /> TABLE 14-5: GROUNDWATER QUALITyss, LEADVILLE MILL(2014 TO PRESENT) <br /> Parameter Units Well MW-3 Well MW-2 <br /> (Northeast) (southwest) <br /> pH - ND ND <br /> Total Dissolved Solids mg/I ND ND <br /> Arsenic 0.01 mg/1 total metals 0.036 0.001 <br /> Antimony* No Standard 0.000 0.000 <br /> Barium* 2.0 mg/I 0.011 0.066 <br /> Beryllium* 0.004mg/I 0.000 0.000 <br /> Cadmium 0.1 mg/I dissolved 0.003 0.000 <br /> Chloride* 250 mg/I 0.015 0.019 <br /> Chromium* 0.1 mg/I 0.000 0.035 <br /> Cobalt 0.016 0.001 <br /> Copper 1.0 mg/I dissolved 0.023 0.008 <br /> Cyanide 0.2mg/I 0.0001 0.0000 <br /> Fluoride* 4.0 mg/I 0.000 0.000 <br /> Iron* 0.3 mg/I dissolved 3.050 8.150 <br /> Lead 0.05 mg/I 0.032 0.007 <br /> Manganese .05 mg/I 0.605 0.247 <br /> Mercury* 0.002 mg/I 0.00013 0.00012 <br /> Molybdenum* 0.21mg/I 0.001 0.000 <br /> Nickel* 0.1 mg/I 0.000 0.003 <br /> Nitrite* 1.0 mg/I as N 0.000 0.000 <br /> Nitrate* 10 mg/I 0.005 0.001 <br /> Selenium* 0.05 mg/I 0.000 0.000 <br /> Sulfate* 250 mg/I 0.370 0.385 <br /> Thallium* 0.002 mg/I 0.004 0.000 <br /> Uranium 0.0168-03 mg/I 0.002 0.003 <br /> Vanadium 0.059 0.002 <br /> Zinc* 5 mg/I 0.052 0.038 <br /> *Initial Sample Obtained 4.01.2020 <br /> Source: [Appendix 14-6 data]. <br /> ND=Non-Detect. <br /> 66 Code of Colorado Regulations-Water Quality Control Commission-5CCR 1002-41 <br /> Version 3.0 January 2021 <br />