Ground-Water Information Center Water Quality Report Site Name: 71 RANCH CO NORTH WELL Report Date: 4/16/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2010Q1010 / 76517 Sample Date: 5/26/2010 12:02:00 PM Location (TRS): 08N 11E 19 DCCA Agency/Sampler: MBMG / MASON, DONALD Latitude/Longitude: 46° 25' 58" N 110° 23' 42" W Field Number: 76517 Datum: NAD83 Lab Date: 8/18/2010 Altitude: 5013.735 Lab/Analyst: MBMG / SM County/State: MEAGHER / MT Sample Method/Handling: / 4230 Site Type: WELL Procedure Type: DISSOLVED Geology: 111SNGR Total Depth (ft): 28 USGS 7.5' Quad: GROVELAND SWL-MP (ft): 10.25 PWS Id: Depth Water Enters (ft): 28 Project: Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 71.200 3.553 Bicarbonate (HCO3) 287.900 4.719 Magnesium (Mg) 10.800 0.889 Carbonate (CO3) 0.000 0.000 Sodium (Na) 51.300 2.232 Chloride (Cl) 1.860 0.052 Potassium (K) 6.420 0.164 Sulfate (SO4) 49.200 1.025 Iron (Fe) 0.006 0.000 Nitrate (as N) 0.239 0.017 Manganese (Mn) <0.001 0.000 Fluoride (F) 0.394 0.021 Silica (SiO2) 14.300 Orthophosphate (as P) <0.05 0.000 Total Cations 6.869 Total Anions 5.834 Trace Element Results (µg/L) Aluminum (Al): <2.0 Cesium (Cs): <0.5 Molybdenum (Mo): 3.790 Strontium (Sr): 1,141.000 Antimony (Sb): <0.2 Chromium (Cr): <0.2 Nickel (Ni): <0.2 Thallium (Tl): <0.2 Arsenic (As): 0.477 Cobalt (Co): <0.2 Niobium (Nb): <0.2 Thorium (Th): <0.2 Barium (Ba): 39.600 Copper (Cu): 0.879 Neodymium (Nd): <0.2 Tin (Sn): <0.2 Beryllium (Be): <0.2 Gallium (Ga): <0.2 Palladium (Pd): <0.5 Titanium (Ti): 0.404 Boron (B): 52.900 Lanthanum (La): <0.2 Praseodymium (Pr): <0.2 Tungsten (W): <0.2 Bromide (Br): <50 Lead (Pb): <0.2 Rubidium (Rb): <0.5 Uranium (U): 3.750 Cadmium (Cd): <0.2 Lithium (Li): 11.000 Silver (Ag): <0.2 Vanadium (V): 0.326 Cerium (Ce): <0.2 Mercury (Hg): NR Selenium (Se): 0.616 Zinc (Zn): 10.800 Zirconium (Zr): <0.2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 345.88 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 492.01 Hardness as CaCO3: 222.24 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 617 Field Alkalinity as CaCO3 (mg/L): 208 PCP (µg/L): NR Lab Conductivity (µmhos): 603 Alkalinity as CaCO3 (mg/L): 236.21 Phosphorus, TD (mg/L): <0.033 Field pH: 7.35 Ryznar Stability Index: 6.968 Field Nitrate (mg/L): 0.000 Lab pH: 7.58 Sodium Adsorption Ratio: 1.4887 Field Dissolved O2 (mg/L): 3.390 Water Temp (°C): 8.5 Langlier Saturation Index: 0.306 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.05 Field Redox (mV): NR Nitrate + Nitrite (mg/L as N) 0.260 Hydroxide (mg/L as OH): NR Lab, Dissolved Organic Carbon (mg/L): NR Total Kjeldahl Nitrogen (mg/L as N) <1.0 Lab, Dissolved Inorganic Carbon (mg/L): NR Lab, Total Organic Carbon (mg/L): NR Total Nitrogen (mg/L as N) <1.0 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.