Ground-Water Information Center Water Quality Report Site Name: MACK TOM  Report Date: 4/28/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 202813 / 238569 Sample Date: 9/26/2012 11:15:00 AM Location (TRS): 02N 03E 24 BDBC Agency/Sampler: MBMG / MASON, DONALD Latitude/Longitude: 45° 54' 48" N 111° 18' 5" W Field Number: 238569 Datum: NAD83 Lab Date: 1/23/2013 1:03:07 PM Altitude: 4670 Lab/Analyst: MBMG / MCGRATH, STEVE County/State: GALLATIN / MT Sample Method/Handling: GRAB / ru:1 ra:0 fu:1 fa:2 Site Type: WELL Procedure Type: DISSOLVED Geology: 374MGHR Total Depth (ft): 940 USGS 7.5' Quad: NIXON GULCH SWL-MP (ft): 224.6 PWS Id: Depth Water Enters (ft): 900 Project: GWCP08 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 35.490 1.771 Bicarbonate (HCO3) 292.540 4.795 Magnesium (Mg) 37.730 3.105 Carbonate (CO3) 0.000 0.000 Sodium (Na) 81.250 3.534 Chloride (Cl) 15.770 0.445 Potassium (K) 12.570 0.322 Sulfate (SO4) 167.100 3.481 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.560 0.040 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 1.170 0.062 Silica (SiO2) 11.970 Orthophosphate (as P) 0.040 J 0.000 Total Cations 8.788 Total Anions 8.822 Trace Element Results (µg/L) Aluminum (Al): <0.400 U Cesium (Cs): 1.270 Molybdenum (Mo): 3.980 Strontium (Sr): 784.200 Antimony (Sb): <0.100 U Chromium (Cr): 1.020 Nickel (Ni): 0.660 Thallium (Tl): <0.100 U Arsenic (As): 0.550 Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 17.310 Copper (Cu): 1.240 Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): <0.100 U Palladium (Pd): 0.430 J Titanium (Ti): 1.820 Boron (B): 416.240 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): 152.000 Lead (Pb): <0.040 U Rubidium (Rb): 22.900 Uranium (U): 2.360 Cadmium (Cd): <0.100 U Lithium (Li): 123.520 Silver (Ag): <0.100 U Vanadium (V): 0.870 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.780 Zinc (Zn): <0.200 U Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 508.56 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 657.22 Hardness as CaCO3: 243.92 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 756 Field Alkalinity as CaCO3 (mg/L): 193 PCP (µg/L): NR Lab Conductivity (µmhos): 775.2 Alkalinity as CaCO3 (mg/L): 240.31 Phosphorus, TD (mg/L): <0.030 U Field pH: 7.62 Ryznar Stability Index: 7.568 Field Nitrate (mg/L): 0.000 Lab pH: 7.57 Sodium Adsorption Ratio: 2.2567 Field Dissolved O2 (mg/L): 4.580 Water Temp (°C): 18.7 Langlier Saturation Index: 0.001 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.010 U Field Redox (mV): 90.9 Nitrate + Nitrite (mg/L as N) 0.560 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) 1.260 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.