2025-06-23_REVISION - M1980244 (94)

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Newmontr.. REEK & VICTOR PO Box 191 CRIPPLE CREEK&VICTOR 10treet Victtoror COCO 80860 ) Table 3.2 CC&V Groundwater Standards Existing Numeric Protection Limits (NPLs) Reg.41 Sitewide GVMW- CRMW- WCMW- WCMW- Table Value Description 8A 3B VIN-2B 3 6 NPL Standard (Existing) Aluminum (dis) (mg/L) 7 5 Antimony (dis) (mg/L) 0.006 Arsenic (dis) (mg/L) 0.01 Barium (dis) (mg/L) 2 Beryllium (dis) (mg/L) 0.004 Boron (dis) (mg/L) 0.75 Cadmium (dis) (mg/L) 0.005 0.005 Chloride (dis) (mg/L) 250 Chromium (dis) (mg/L) 0.1 Cobalt(dis) (mg/L) 0.05 Copper(dis) (mg/L) 0.2 0.2 Cyanide [Free] (mg/L) 0.2 Cyanide [WAD] (mg/L) 0.2 --- • Fluoride (mg/L) 2 2 Iron (dis) (mg/L) 14 0.3 Lead (dis) (mg/L) 0.05 Lithium (dis) (mg/L) 2.5 Manganese(dis) (mg/L) 1 8.1 4 0.5 0.2 3 0.05 Mercury(dis) (mg/L) 0.002 0.002 Molybdenum (dis) (mg/L) 0.21 Nickel (dis) (mg/L) 0.2 0.1 Nitrate as Nitrogen (mg/L) 10 10 Nitrite as Nitrogen (mg/L) 1 1 Nitrate+ Nitrite as Nitrogen (mg/L) 11 10 pH Field - Upper 8.5 9 8.5 9 8.5 8.5 8.5 pH Field - Lower 6.5 6 6.5 6 6.5 6 6.5 Selenium (dis) (mg/L) 0.024 0.02 Silver(dis)(mg/L) 0.05 Sulfate (mg/L) 250 1070 800 250 250 250 Thallium (dis) (mg/L) 0.002 Uranium (dis) (mg/L) 0.03 Vanadium (dis) (mg/L) 0.1 Zinc(dis) (mg/L) 2 2 Notes: If no NPL exists (Sitewide or well-specific) for that parameter the most stringent value from Colorado Regulation 41 Tables 1, 2, or 3 is applied. • Acronyms: dis-dissolved mg/L-milligram per liter Department THIS DOCUMENT IS UNCONTROLLED IN HARD COPY FORMAT Doc Id: SI':R Date of This Issue--/--/-- Date of Next Review:--/--/-- Page 12 of 73