Ground-Water Information Center Water Quality Report Site Name: RIVA RIDGE RANCH  Report Date: 5/8/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2001Q1666 / 123814 Sample Date: 6/6/2001 4:00:00 PM Location (TRS): 05N 15W 08 BCDA Agency/Sampler: MBMG / DCM Latitude/Longitude: 46° 12' 6" N 113° 30' 37" W Field Number: 123814 Datum: NAD27 Lab Date: 7/25/2001 Altitude: 5435 Lab/Analyst: MBMG / JMC County/State: GRANITE / MT Sample Method/Handling: / 4230 Site Type: WELL Procedure Type: DISSOLVED Geology: 120SDMS Total Depth (ft): 150 USGS 7.5' Quad: MAUKEY GULCH SWL-MP (ft): 51.56 PWS Id: Depth Water Enters (ft): 85 Project: GWCP05 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 24.900 1.243 Bicarbonate (HCO3) 230.300 3.775 Magnesium (Mg) 8.120 0.668 Carbonate (CO3) 0.000 0.000 Sodium (Na) 47.100 2.049 Chloride (Cl) 3.370 0.095 Potassium (K) 3.980 0.102 Sulfate (SO4) 15.100 0.315 Iron (Fe) <..05 0.000 Nitrate (as N) <.5 P 0.000 Manganese (Mn) <.001 0.000 Fluoride (F) 0.468 0.025 Silica (SiO2) 14.700 Orthophosphate (as P) <.05 0.000 Total Cations 4.066 Total Anions 4.209 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 210.000 Antimony (Sb): <2 Chromium (Cr): <2 Nickel (Ni): <2 Thallium (Tl): <5 Arsenic (As): 1.240 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 84.500 Copper (Cu): 5.490 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 Boron (B): <30 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <50 Lead (Pb): <2 Rubidium (Rb): NR Uranium (U): 1.380 Cadmium (Cd): <2 Lithium (Li): 67.700 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): 1.990 Zinc (Zn): <2 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 230.33 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 347.03 Hardness as CaCO3: 95.6 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 402 Field Alkalinity as CaCO3 (mg/L): 188 PCP (µg/L): NR Lab Conductivity (µmhos): 379 Alkalinity as CaCO3 (mg/L): 188.64 Phosphorus, TD (mg/L): <.05 Field pH: 8.05 Ryznar Stability Index: 7.906 Field Nitrate (mg/L): 0.000 Lab pH: 7.75 Sodium Adsorption Ratio: 2.0917 Field Dissolved O2 (mg/L): NR Water Temp (°C): 9.5 Langlier Saturation Index: -0.078 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): 207.7 Nitrate + Nitrite (mg/L as N) NR Hydroxide (mg/L as OH): NR Lab, Dissolved Organic Carbon (mg/L): NR Total Kjeldahl Nitrogen (mg/L as N) NR Lab, Dissolved Inorganic Carbon (mg/L): NR Lab, Total Organic Carbon (mg/L): NR Total Nitrogen (mg/L as N) NR Acidity to 4.5 (mg/L CaCO3) NR Acidity to 8.3 (mg/L CaCO3) NR As(III) (ug/L) NR As(V) (ug/L) NR Total Susp Solids (mg/L) NR Notes Sample Condition: Field Remarks: Lab Remarks:

Explanation: mg/L = milligrams per Liter; µg/L = micrograms per Liter; ft = feet; NR = No Reading in GWIC Qualifiers: J = Estimated quantity above detection limit but below reporting limit; P = Preserved sample; S = Method of standard additions; U = Undetected quantity below detection limit; * = Duplicate analysis not within control limits; ** = Sum of Dissolved Constituents is the sum of major cations (Na, Ca, K, Mg, Mn, Fe) and anions (HCO3, CO3, SO4, Cl, SiO2, NO3, F) in mg/L. Total Dissolved Solids is reported as equivalent weight of evaporation residue. Disclaimer These data represent the contents of the GWIC databases at the Montana Bureau of Mines and Geology at the time and date of the retrieval. The information is considered unpublished and is subject to correction and review on a daily basis. The Bureau warrants the accurate transmission of the data to the original end user. Retransmission of the data to other users is discouraged and the Bureau claims no responsibility if the material is retransmitted.