Ground-Water Information Center Water Quality Report Site Name: THOMPSON HOME  Report Date: 4/19/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1979Q0218 / 5960 Sample Date: 7/31/1978 4:20:00 PM Location (TRS): 12N 20W 12 BCDA Agency/Sampler: USGS / E H Latitude/Longitude: 46° 49' 7" N 114° 3' 38" W Field Number: 19 Datum: NAD27 Lab Date: 9/13/1978 Altitude: 3193 Lab/Analyst: MBMG / FNA County/State: MISSOULA / MT Sample Method/Handling: GRAB / 4234 Site Type: WELL Procedure Type: DISSOLVED Geology: 120SDMS Total Depth (ft): 287 USGS 7.5' Quad: SOUTHWEST MISSOULA 7 1/2' SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): NR Project: Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 29.200 1.457 Bicarbonate (HCO3) 149.000 2.442 Magnesium (Mg) 11.200 0.922 Carbonate (CO3) 0.000 0.000 Sodium (Na) 21.000 0.914 Chloride (Cl) 1.250 0.035 Potassium (K) 2.100 0.054 Sulfate (SO4) 40.500 0.844 Iron (Fe) 0.520 0.019 Nitrate (as N) 0.316 0.023 Manganese (Mn) 0.460 0.017 Fluoride (F) 0.200 0.011 Silica (SiO2) 23.700 Orthophosphate (as P) NR 0.000 Total Cations 3.381 Total Anions 3.354 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): 10.000 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): 203.8 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 279.4 Hardness as CaCO3: 119.01 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): NR Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 324.8 Alkalinity as CaCO3 (mg/L): 122.21 Phosphorus, TD (mg/L): NR Field pH: NR Ryznar Stability Index: 8.505 Field Nitrate (mg/L): NR Lab pH: 7.39 Sodium Adsorption Ratio: 0.8376 Field Dissolved O2 (mg/L): NR Water Temp (°C): 13 Langlier Saturation Index: -0.558 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: MISSOULA 00200 WELL PUMPING 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.