Ground-Water Information Center Water Quality Report Site Name: MBMG GWIP LOLO DNRC REAL TIME HWY93S14 Report Date: 5/2/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 257423 / 290632 Sample Date: 10/16/2023 5:30:00 PM Location (TRS): 12N 20W 35 CDC Agency/Sampler: MBMG / RICHTER, MIKE Latitude/Longitude: 46° 44' 55" N 114° 4' 55" W Field Number: 290632 Datum: NAD83 Lab Date: 11/27/2023 1:34:50 PM Altitude: 3181.417 Lab/Analyst: MBMG / TIMMER, JACKIE County/State: MISSOULA / MT Sample Method/Handling: PUMPED / ru:1 ra:0 fu:2 fa:2 Site Type: WELL Procedure Type: DISSOLVED Geology: 110SNGR Total Depth (ft): 55 USGS 7.5' Quad: FLORENCE SWL-MP (ft): 13.28 PWS Id: Depth Water Enters (ft): 50 Project: BWIPLO, BWIPLOMONGW, BWIPLOLITH,  BWIPLOLITH1, BWIPLOLITHX, BWIPLOLITH2, GWAAMON Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 20.320 1.014 Bicarbonate (HCO3) 101.320 1.661 Magnesium (Mg) 4.700 0.387 Carbonate (CO3) 0.000 0.000 Sodium (Na) 4.050 0.176 Chloride (Cl) 2.840 0.080 Potassium (K) 1.170 0.030 Sulfate (SO4) 3.760 0.078 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.050 0.004 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.120 0.006 Silica (SiO2) 14.900 Orthophosphate (as P) <0.020 U 0.000 Total Cations 1.608 Total Anions 1.829 Trace Element Results (µg/L) Aluminum (Al): <2.000 U Cesium (Cs): <0.100 U Molybdenum (Mo): 0.230 J Strontium (Sr): 36.220 Antimony (Sb): <0.100 U Chromium (Cr): <0.100 U Nickel (Ni): <0.100 U Thallium (Tl): <0.100 U Arsenic (As): <0.100 U Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 31.870 Copper (Cu): <0.500 U Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): 0.730 Palladium (Pd): <0.100 U Titanium (Ti): <0.100 U Boron (B): 1.000 J Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): <10.000 U Lead (Pb): <0.060 U Rubidium (Rb): 0.660 Uranium (U): <0.100 U Cadmium (Cd): <0.100 U Lithium (Li): <2.000 U Silver (Ag): <0.100 U Vanadium (V): <0.100 U Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): <0.100 U Zinc (Zn): <0.500 U Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 101.77 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 153.02 Hardness as CaCO3: 70.08 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 161.1 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 154.93 Alkalinity as CaCO3 (mg/L): 82.84 Phosphorus, TD (mg/L): <0.030 U Field pH: 7.7 Ryznar Stability Index: 9.018 Field Nitrate (mg/L): 0.000 Lab pH: 7.53 Sodium Adsorption Ratio: 0.2079 Field Dissolved O2 (mg/L): 1.440 Water Temp (°C): 7.9 Langlier Saturation Index: -0.744 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.010 U Field Redox (mV): 59.2 Nitrate + Nitrite (mg/L as N) <0.200 U Hydroxide (mg/L as OH): 0.000 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.