Ground-Water Information Center Water Quality Report Site Name: LCWQPD - LINCOLN AND MONTANA WELL  Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2011Q0694 / 191537 Sample Date: 10/20/2010 4:15:00 PM Location (TRS): 11N 03W 20 BBBB Agency/Sampler: MBMG / SWIERC, JAMES E. Latitude/Longitude: 46° 42' 15" N 112° 1' 15" W Field Number: Datum: WGS84 Lab Date: 2/25/2011 Altitude: 3756.81 Lab/Analyst: MBMG / SM County/State: LEWIS AND CLARK / MT Sample Method/Handling: PUMPED / 5230 Site Type: WELL Procedure Type: DISSOLVED Geology: 110ALVM Total Depth (ft): 43 USGS 7.5' Quad: SCRATCHGRAVEL HILLS SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 33 Project: LCWQPD, GWAAMON, COLIPHAGE,  NHCGW, BWIPNH, NGWMN-MONTANA, BWIPNHMONM,  BWIPNHWQ2, BWIPNHWQ3, BWIPNHSGSURV Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 37.700 1.881 Bicarbonate (HCO3) 161.600 2.649 Magnesium (Mg) 10.400 0.856 Carbonate (CO3) 0.000 0.000 Sodium (Na) 17.600 0.766 Chloride (Cl) 8.980 0.253 Potassium (K) 3.470 0.089 Sulfate (SO4) 32.650 0.680 Iron (Fe) <0.002 0.000 Nitrate (as N) 0.160 0.011 Manganese (Mn) <0.001 0.000 Fluoride (F) 1.020 0.054 Silica (SiO2) 18.500 Orthophosphate (as P) <0.1 0.000 Total Cations 3.603 Total Anions 3.647 Trace Element Results (µg/L) Aluminum (Al): 2.190 Cesium (Cs): <0.5 Molybdenum (Mo): 3.660 Strontium (Sr): 209.000 Antimony (Sb): 0.599 Chromium (Cr): <0.2 Nickel (Ni): <0.2 Thallium (Tl): <0.2 Arsenic (As): 3.940 Cobalt (Co): <0.2 Niobium (Nb): <0.5 Thorium (Th): <0.2 Barium (Ba): 58.300 Copper (Cu): <0.5 Neodymium (Nd): <0.2 Tin (Sn): <0.5 Beryllium (Be): <0.2 Gallium (Ga): <0.2 Palladium (Pd): <0.5 Titanium (Ti): 0.298 Boron (B): 75.700 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): 1.850 Cadmium (Cd): <0.2 Lithium (Li): 48.500 Silver (Ag): <0.2 Vanadium (V): 5.020 Cerium (Ce): <0.2 Mercury (Hg): NR Selenium (Se): 0.264 Zinc (Zn): <0.5 Zirconium (Zr): <0.2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 210.91 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 293.1 Hardness as CaCO3: 136.94 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 292.4 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 314 Alkalinity as CaCO3 (mg/L): 132.87 Phosphorus, TD (mg/L): <0.025 Field pH: 8.08 Ryznar Stability Index: 7.590 Field Nitrate (mg/L): NR Lab pH: 8.01 Sodium Adsorption Ratio: 0.6693 Field Dissolved O2 (mg/L): NR Water Temp (°C): 16.5 Langlier Saturation Index: 0.210 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) <0.2 P 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) <1.0 P 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.