Ground-Water Information Center Water Quality Report Site Name: BENSON WENDY  Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2008Q0359 / 176834 Sample Date: 2/27/2008 Location (TRS): 01S 04E 02 BC Agency/Sampler: / ARE Latitude/Longitude: 45° 46' 55" N 111° 12' 10" W Field Number: 60 BAILYS WAY Datum: NAD83 Lab Date: 3/25/2008 Altitude: Lab/Analyst: MBMG / WO County/State: GALLATIN / MT Sample Method/Handling: GRAB / 1111 Site Type: WELL Procedure Type: DISSOLVED Geology: 112SNGR Total Depth (ft): 83 USGS 7.5' Quad: SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 78.5 Project: RIVERROCK Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 60.900 3.039 Bicarbonate (HCO3) 218.400 3.580 Magnesium (Mg) 15.300 1.259 Carbonate (CO3) 0.000 0.000 Sodium (Na) 6.170 0.268 Chloride (Cl) 5.580 0.157 Potassium (K) 3.220 0.082 Sulfate (SO4) 32.200 0.671 Iron (Fe) 0.011 0.000 Nitrate (as N) 1.57 P 0.112 Manganese (Mn) <0.001 0.000 Fluoride (F) 0.225 0.012 Silica (SiO2) 20.900 Orthophosphate (as P) <0.05 0.000 Total Cations 4.658 Total Anions 4.532 Trace Element Results (µg/L) Aluminum (Al): 2.390 Cesium (Cs): <0.1 Molybdenum (Mo): <1.0 Strontium (Sr): 332.000 Antimony (Sb): <0.1 Chromium (Cr): <0.1 Nickel (Ni): 0.970 Thallium (Tl): <0.1 Arsenic (As): 0.905 Cobalt (Co): 0.122 Niobium (Nb): <0.1 Thorium (Th): <0.05 Barium (Ba): 122.000 Copper (Cu): 1.210 Neodymium (Nd): <1.0 Tin (Sn): <0.1 Beryllium (Be): <0.1 Gallium (Ga): <0.1 Palladium (Pd): 0.912 Titanium (Ti): 1.110 Boron (B): 13.300 Lanthanum (La): <0.1 Praseodymium (Pr): <0.1 Tungsten (W): <1.0 Bromide (Br): <100 Lead (Pb): <0.2 Rubidium (Rb): 1.330 Uranium (U): 2.320 Cadmium (Cd): <0.1 Lithium (Li): 6.320 Silver (Ag): <1.0 Vanadium (V): 1.250 Cerium (Ce): <0.1 Mercury (Hg): NR Selenium (Se): <0.5 Zinc (Zn): 7.660 Zirconium (Zr): <0.1 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 251.6 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 362.21 Hardness as CaCO3: 215.04 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 361 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 413 Alkalinity as CaCO3 (mg/L): 178.8 Phosphorus, TD (mg/L): <0.01 Field pH: 7.66 Ryznar Stability Index: 7.416 Field Nitrate (mg/L): NR Lab pH: 7.51 Sodium Adsorption Ratio: 0.178 Field Dissolved O2 (mg/L): NR Water Temp (°C): 10.9 Langlier Saturation Index: 0.047 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): NR 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: 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.