Ground-Water Information Center Water Quality Report Site Name: USGS OBSERVATION WELL NELSON RD  Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 222780 / 133176 Sample Date: 6/15/2017 2:22:00 PM Location (TRS): 01S 05E 09 DCCC Agency/Sampler: MBMG / MASON, DONALD Latitude/Longitude: 45° 45' 30" N 111° 6' 47" W Field Number: 133176 Datum: NAD83 Lab Date: 8/3/2017 6:33:11 AM Altitude: 4495.26 Lab/Analyst: MBMG / TIMMER, JACKIE County/State: GALLATIN / MT Sample Method/Handling: GRAB / ru:1 ra:0 fu:2 fa:2 Site Type: WELL Procedure Type: DISSOLVED Geology: 111SNGR Total Depth (ft): 141 USGS 7.5' Quad: MISER CREEK SWL-MP (ft): 33.53 PWS Id: Depth Water Enters (ft): 15 Project: GWAAMON, GWCP08, NGWMN-MONTANA,  GWCP08MON, BWIP4C, GALVAL Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 76.080 3.796 Bicarbonate (HCO3) 329.160 5.395 Magnesium (Mg) 19.780 1.628 Carbonate (CO3) 0.000 0.000 Sodium (Na) 12.800 0.557 Chloride (Cl) 16.140 0.455 Potassium (K) 4.010 0.103 Sulfate (SO4) 12.440 0.259 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 1.230 0.088 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.140 0.007 Silica (SiO2) 21.830 Orthophosphate (as P) 0.050 J 0.000 Total Cations 6.091 Total Anions 6.205 Trace Element Results (µg/L) Aluminum (Al): <2.000 U Cesium (Cs): <0.100 U Molybdenum (Mo): 0.500 Strontium (Sr): 250.340 Antimony (Sb): <0.100 U Chromium (Cr): 0.470 J Nickel (Ni): <0.100 U Thallium (Tl): <0.100 U Arsenic (As): 0.840 Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 84.820 Copper (Cu): 0.610 J Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): 3.370 Palladium (Pd): <0.100 U Titanium (Ti): 0.140 J Boron (B): 20.850 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): 77.000 Lead (Pb): <0.060 U Rubidium (Rb): 2.690 Uranium (U): 3.030 Cadmium (Cd): <0.100 U Lithium (Li): 3.190 J Silver (Ag): <0.100 U Vanadium (V): 2.220 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): <0.100 U Zinc (Zn): <0.500 U Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 325.93 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 492.86 Hardness as CaCO3: 271.39 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 508 Field Alkalinity as CaCO3 (mg/L): 251 PCP (µg/L): NR Lab Conductivity (µmhos): 521.53 Alkalinity as CaCO3 (mg/L): 269.84 Phosphorus, TD (mg/L): 0.040 J Field pH: 7.41 Ryznar Stability Index: 7.255 Field Nitrate (mg/L): 0.000 Lab pH: 7.12 Sodium Adsorption Ratio: 0.3434 Field Dissolved O2 (mg/L): 7.510 Water Temp (°C): 12.1 Langlier Saturation Index: -0.068 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.010 U Field Redox (mV): 127.5 Nitrate + Nitrite (mg/L as N) 1.160 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 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.