Ground-Water Information Center Water Quality Report Site Name: FT. MISSOULA  Report Date: 4/29/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1979Q0242 / 5976 Sample Date: 7/25/1978 3:00:00 PM Location (TRS): 13N 19W 31 BDB Agency/Sampler: USGS / E H Latitude/Longitude: 46° 50' 34" N 114° 3' 7" W Field Number: 02 Datum: NAD27 Lab Date: 8/30/1978 Altitude: 3150 Lab/Analyst: MBMG / FNA County/State: MISSOULA / MT Sample Method/Handling: GRAB / 4234 Site Type: WELL Procedure Type: DISSOLVED Geology: 112ALVM Total Depth (ft): NR USGS 7.5' Quad: SOUTHWEST MISSOULA 7 1/2' SWL-MP (ft): NR PWS Id: 03159003 Depth Water Enters (ft): NR Project: PWSINV Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 47.800 2.385 Bicarbonate (HCO3) 181.000 2.967 Magnesium (Mg) 13.800 1.136 Carbonate (CO3) 0.000 0.000 Sodium (Na) 7.000 0.305 Chloride (Cl) 3.800 0.107 Potassium (K) 1.700 0.043 Sulfate (SO4) 29.300 0.610 Iron (Fe) <.01 0.000 Nitrate (as N) 1.401 0.100 Manganese (Mn) <.01 0.000 Fluoride (F) 0.200 0.011 Silica (SiO2) 14.400 Orthophosphate (as P) NR 0.000 Total Cations 3.869 Total Anions 3.795 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. 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): 207.76 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 299.6 Hardness as CaCO3: 176.16 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): NR Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 363.5 Alkalinity as CaCO3 (mg/L): 148.45 Phosphorus, TD (mg/L): NR Field pH: NR Ryznar Stability Index: 7.798 Field Nitrate (mg/L): NR Lab pH: 7.5 Sodium Adsorption Ratio: 0.2295 Field Dissolved O2 (mg/L): NR Water Temp (°C): 9.5 Langlier Saturation Index: -0.149 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 PUMPED 5 MINUTES 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.