Ground-Water Information Center Water Quality Report Site Name: SILVER SPRINGS  Report Date: 5/18/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q1145 / 9027 Sample Date: 6/4/2003 11:00:00 AM Location (TRS): 05S 05W 14 CCCCA Agency/Sampler: RVCD / SP Latitude/Longitude: 45° 23' 38" N 112° 11' 36" W Field Number: RVCD-0604-001 Datum: NAD83 Lab Date: 8/6/2003 Altitude: 4945.25 Lab/Analyst: MBMG / KTH County/State: MADISON / MT Sample Method/Handling: GRAB / Site Type: SPRING Procedure Type: DISSOLVED Geology: Total Depth (ft): NR USGS 7.5' Quad: SHERIDAN SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): NR Project: RVCD2003, LRGSPRINGS Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 95.800 4.780 Bicarbonate (HCO3) 360.700 5.912 Magnesium (Mg) 34.900 2.872 Carbonate (CO3) 0.000 0.000 Sodium (Na) 23.000 1.001 Chloride (Cl) 7.680 0.217 Potassium (K) 4.850 0.124 Sulfate (SO4) 149.000 3.104 Iron (Fe) 0.020 0.001 Nitrate (as N) 0.96 P 0.069 Manganese (Mn) <0.001 0.000 Fluoride (F) <0.5 0.000 Silica (SiO2) 8.430 Orthophosphate (as P) <0.5 0.000 Total Cations 8.778 Total Anions 9.301 Trace Element Results (µg/L) Aluminum (Al): NR Cesium (Cs): NR Molybdenum (Mo): NR Strontium (Sr): NR Antimony (Sb): NR Chromium (Cr): NR Nickel (Ni): NR Thallium (Tl): NR Arsenic (As): NR Cobalt (Co): NR Niobium (Nb): NR Thorium (Th): NR Barium (Ba): NR Copper (Cu): NR Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): NR Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): NR Boron (B): NR Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <500 Lead (Pb): NR Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): NR Lithium (Li): NR Silver (Ag): NR Vanadium (V): NR Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): NR Zinc (Zn): NR Zirconium (Zr): NR Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 501.53 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 684.7 Hardness as CaCO3: 382.86 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 760 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 778 Alkalinity as CaCO3 (mg/L): 296.08 Phosphorus, TD (mg/L): NR Field pH: 7.13 Ryznar Stability Index: 6.494 Field Nitrate (mg/L): 0.000 Lab pH: 7.6 Sodium Adsorption Ratio: 0.5115 Field Dissolved O2 (mg/L): NR Water Temp (°C): 13.8 Langlier Saturation Index: 0.553 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): NR 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: SAMPLED DIRECTLY FROM SPRING. 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.