Ground-Water Information Center Water Quality Report Site Name: OTNESS LES *WELL 1  Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1976Q1622 / 6302 Sample Date: 1/18/1977 10:00:00 AM Location (TRS): 24N 04W 08 CBB Agency/Sampler: MBMG / FAS Latitude/Longitude: 47° 50' 54" N 112° 9' 16" W Field Number: 77SS175 Datum: NAD27 Lab Date: 7/21/1977 Altitude: 3895 Lab/Analyst: MBMG / LAW County/State: TETON / MT Sample Method/Handling: GRAB / 4130 Site Type: WELL Procedure Type: Geology: 211CLRD Total Depth (ft): 150 USGS 7.5' Quad: CHOTEAU 7 1/2 SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): NR Project: UTAS Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 32.500 1.622 Bicarbonate (HCO3) 498.000 8.162 Magnesium (Mg) 89.000 7.324 Carbonate (CO3) 0.000 0.000 Sodium (Na) 31.900 1.388 Chloride (Cl) 24.400 0.688 Potassium (K) 1.000 0.026 Sulfate (SO4) 52.000 1.083 Iron (Fe) <.01 0.000 Nitrate (as N) 2.300 0.164 Manganese (Mn) <.01 0.000 Fluoride (F) 0.400 0.021 Silica (SiO2) 11.900 Orthophosphate (as P) NR 0.000 Total Cations 10.359 Total Anions 10.119 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): NR 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): 489.82 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 742.5 Hardness as CaCO3: 447.48 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 773 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 864.4 Alkalinity as CaCO3 (mg/L): 408.45 Phosphorus, TD (mg/L): NR Field pH: 7.95 Ryznar Stability Index: 6.664 Field Nitrate (mg/L): NR Lab pH: 8.09 Sodium Adsorption Ratio: 0.6582 Field Dissolved O2 (mg/L): NR Water Temp (°C): 16 Langlier Saturation Index: 0.713 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 Additional Parameters Aluminum Diss (mg/L-Al) L.05 Arsenic Diss(ug/L-As) L2. Boron Diss (mg/L-B) 0.160 Chromium Diss (mg/L-Cr) L.01 Copper Diss (mg/L-Cu) 0.020 Mercury Diss(ug/L-Hg) L.3 Lithium Diss(mg/L-Li) 0.050 Nickel Diss (mg/L-Ni) 0.010 Lead Diss (mg/L-Pb) L.05 Phosphate T Dis (mg/L - P) 0.059 Antimony Dis(mg/L-Sb) L.2 Selenium Diss (ug/L-Se) L2. Tin Diss (mg/L-Sn) 0.130 Strontium Diss (mg/L-Sr) 0.990 Zinc Diss (mg/L-Zn) 0.340 Notes Sample Condition: Field Remarks: SALINE SEEP PROJECT * RT 2 BOX 2 CHOTEAU MT * NUMBER ONE WELL ON LOG * Lab Remarks:

Explanation: mg/L = milligrams per Liter; µg/L = micrograms per Liter; ft = feet; NR = No Reading in GWIC Qualifiers: A = Hydride atomic absorption; E = Estimated due to interference; H = Exceeded holding time; J = Estimated quantity above detection limit but below reporting limit; K = Na+K combined; N = Spiked sample recovery not within control limits; 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.