Ground-Water Information Center Water Quality Report Site Name: HOWARD MIKE  Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 210083 / 176459 Sample Date: 9/16/2015 1:42:00 PM Location (TRS): 01S 04E 03 BC Agency/Sampler: MBMG / ENGLISH, ALAN Latitude/Longitude: 45° 46' 55" N 111° 13' 26" W Field Number: 176459 Datum: NAD83 Lab Date: 10/13/2015 8:46:48 AM Altitude: 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: 110ALVM Total Depth (ft): 80 USGS 7.5' Quad: SWL-MP (ft): 46.52 PWS Id: Depth Water Enters (ft): 78.5 Project: RIVERROCK, BWIPMN, GALVAL_GW319 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 64.310 3.209 Bicarbonate (HCO3) 260.400 4.268 Magnesium (Mg) 18.300 1.506 Carbonate (CO3) 0.000 0.000 Sodium (Na) 11.400 0.496 Chloride (Cl) 18.440 0.520 Potassium (K) 2.480 0.063 Sulfate (SO4) 35.100 0.731 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 4.330 0.309 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.160 0.008 Silica (SiO2) 20.400 Orthophosphate (as P) 0.030 J 0.000 Total Cations 5.286 Total Anions 5.837 Trace Element Results (µg/L) Aluminum (Al): <2.000 U Cesium (Cs): <0.100 U Molybdenum (Mo): 0.520 Strontium (Sr): 371.950 Antimony (Sb): <0.100 U Chromium (Cr): <0.100 U Nickel (Ni): 0.680 Thallium (Tl): <0.100 U Arsenic (As): 0.590 Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 99.110 Copper (Cu): 0.570 J Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): 5.220 Palladium (Pd): 0.300 J Titanium (Ti): 42.700 Boron (B): 34.040 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): <10.000 U Lead (Pb): <0.060 U Rubidium (Rb): 1.650 Uranium (U): 2.350 Cadmium (Cd): <0.100 U Lithium (Li): 5.250 J Silver (Ag): <0.100 U Vanadium (V): 1.060 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): <0.100 U Zinc (Zn): 14.300 Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 300.7 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 432.62 Hardness as CaCO3: 235.9 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 588.5 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 497.82 Alkalinity as CaCO3 (mg/L): 213.24 Phosphorus, TD (mg/L): <0.030 U Field pH: 7.35 Ryznar Stability Index: 7.366 Field Nitrate (mg/L): NR Lab pH: 7.36 Sodium Adsorption Ratio: 0.3116 Field Dissolved O2 (mg/L): 6.490 Water Temp (°C): 10.3 Langlier Saturation Index: -0.003 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.010 U Field Redox (mV): 134.3 Nitrate + Nitrite (mg/L as N) 3.510 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) 4.000 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: SAMPLE FROM FROST-FREE HYDRANT BY WELLHEAD 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.