Ground-Water Information Center Water Quality Report Site Name: MISSOULA COUNTY WQD WELL W131931D2  Report Date: 4/29/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1999Q0835 / 157210 Sample Date: 6/21/1999 9:50:00 AM Location (TRS): 13N 19W 31 DDBA Agency/Sampler: MBMG / CARSTARPHEN, CAMELA Latitude/Longitude: 46° 50' 18" N 114° 2' 33" W Field Number: 157210 Datum: NAD27 Lab Date: 8/4/1999 Altitude: 3162.16 Lab/Analyst: MBMG / BJK County/State: MISSOULA / MT Sample Method/Handling: PUMPED / 4220 Site Type: WELL Procedure Type: DISSOLVED Geology: 112ALVM Total Depth (ft): 97 USGS 7.5' Quad: SOUTHWEST MISSOULA SWL-MP (ft): 32.03 PWS Id: Depth Water Enters (ft): 87 Project: GWCP04 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 55.400 2.764 Bicarbonate (HCO3) 233.300 3.824 Magnesium (Mg) 14.500 1.193 Carbonate (CO3) 0.000 0.000 Sodium (Na) 7.880 0.343 Chloride (Cl) 8.446 0.238 Potassium (K) 2.010 0.051 Sulfate (SO4) 19.330 0.403 Iron (Fe) <.01 0.000 Nitrate (as N) 1.06 P 0.076 Manganese (Mn) <.002 0.000 Fluoride (F) 0.145 0.008 Silica (SiO2) 14.200 Orthophosphate (as P) <.05 0.000 Total Cations 4.356 Total Anions 4.548 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 167.000 Antimony (Sb): <2 Chromium (Cr): <2 Nickel (Ni): <2 Thallium (Tl): <5 Arsenic (As): 1.020 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 243.000 Copper (Cu): <2 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <20 Boron (B): <30 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <50 Lead (Pb): <2 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <2 Lithium (Li): <100 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1 Zinc (Zn): <2 Zirconium (Zr): <10 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 235.68 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 353.9 Hardness as CaCO3: 198.02 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 418 Field Alkalinity as CaCO3 (mg/L): 240 PCP (µg/L): NR Lab Conductivity (µmhos): 423 Alkalinity as CaCO3 (mg/L): 191.1 Phosphorus, TD (mg/L): <.2 Field pH: 7.4 Ryznar Stability Index: 7.330 Field Nitrate (mg/L): NR Lab pH: 7.62 Sodium Adsorption Ratio: 0.2474 Field Dissolved O2 (mg/L): NR Water Temp (°C): 11.5 Langlier Saturation Index: 0.145 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): 292.4 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: CLEAR Field Remarks: 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.