Ground-Water Information Center Water Quality Report Site Name: MT FWP - SELKIRK FISHING ACCESS - HOMESTEAD WELL  Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 222787 / 184127 Sample Date: 6/26/2017 12:34:00 PM Location (TRS): 08N 12E 09 DBBD Agency/Sampler: MBMG / MASON, DONALD Latitude/Longitude: 46° 27' 55" N 110° 13' 34" W Field Number: 184127 Datum: NAD83 Lab Date: 8/3/2017 6:33:11 AM Altitude: 4645.069 Lab/Analyst: MBMG / TIMMER, JACKIE County/State: WHEATLAND / MT Sample Method/Handling: GRAB / ru:1 ra:0 fu:2 fa:2 Site Type: WELL Procedure Type: DISSOLVED Geology: 211CLGT Total Depth (ft): 81.4 USGS 7.5' Quad: TWODOT NORTHWEST SWL-MP (ft): 6.31 PWS Id: Depth Water Enters (ft): NR Project: GWAAMON Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 8.800 0.439 Bicarbonate (HCO3) 381.110 6.246 Magnesium (Mg) 2.490 0.205 Carbonate (CO3) 13.270 0.475 Sodium (Na) 815.850 35.489 Chloride (Cl) 20.560 0.580 Potassium (K) 1.760 0.045 Sulfate (SO4) 1,369.000 28.516 Iron (Fe) <0.075 U 0.000 Nitrate (as N) <0.050 U 0.000 Manganese (Mn) <0.010 U 0.000 Fluoride (F) 1.380 0.073 Silica (SiO2) 6.580 Orthophosphate (as P) <0.100 U 0.000 Total Cations 36.254 Total Anions 35.891 Trace Element Results (µg/L) Aluminum (Al): <10.000 U Cesium (Cs): <0.500 U Molybdenum (Mo): <0.500 U Strontium (Sr): 812.600 Antimony (Sb): <0.500 U Chromium (Cr): <0.500 U Nickel (Ni): <0.500 U Thallium (Tl): <0.500 U Arsenic (As): <0.500 U Cobalt (Co): <0.500 U Niobium (Nb): <0.500 U Thorium (Th): <0.500 U Barium (Ba): 8.110 Copper (Cu): <2.500 U Neodymium (Nd): <0.500 U Tin (Sn): <0.500 U Beryllium (Be): <0.500 U Gallium (Ga): <0.500 U Palladium (Pd): <0.500 U Titanium (Ti): 30.710 Boron (B): 605.730 Lanthanum (La): <0.500 U Praseodymium (Pr): <0.500 U Tungsten (W): <0.500 U Bromide (Br): <50.000 U Lead (Pb): <0.300 U Rubidium (Rb): <0.500 U Uranium (U): <0.500 U Cadmium (Cd): <0.500 U Lithium (Li): 56.320 Silver (Ag): <0.500 U Vanadium (V): <0.500 U Cerium (Ce): <0.500 U Mercury (Hg): NR Selenium (Se): <0.500 U Zinc (Zn): 41.430 Zirconium (Zr): <0.500 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 2428.02 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 2621.33 Hardness as CaCO3: 32.22 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 3360 Field Alkalinity as CaCO3 (mg/L): 325 PCP (µg/L): NR Lab Conductivity (µmhos): 3570.03 Alkalinity as CaCO3 (mg/L): 334.17 Phosphorus, TD (mg/L): <0.150 U Field pH: 8.81 Ryznar Stability Index: 7.513 Field Nitrate (mg/L): 0.000 Lab pH: 8.55 Sodium Adsorption Ratio: 62.5524 Field Dissolved O2 (mg/L): 0.500 Water Temp (°C): 10.7 Langlier Saturation Index: 0.518 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.050 U Field Redox (mV): -228.7 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: CLEAR - SOMEWHAT MILKY 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.