Ground-Water Information Center Water Quality Report Site Name: USGS OBSERVATION WELL NELSON RD  Report Date: 4/16/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2009Q0185 / 133176 Sample Date: 8/20/2008 9:51:00 AM Location (TRS): 01S 05E 09 DCCC Agency/Sampler: MBMG / DCM Latitude/Longitude: 45° 45' 30" N 111° 6' 47" W Field Number: 133176 Datum: NAD83 Lab Date: 10/13/2008 Altitude: 4495.26 Lab/Analyst: MBMG / SM County/State: GALLATIN / MT Sample Method/Handling: GRAB / 4230 Site Type: WELL Procedure Type: DISSOLVED Geology: 111SNGR Total Depth (ft): 141 USGS 7.5' Quad: MISER CREEK SWL-MP (ft): 23.45 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) 83.500 4.167 Bicarbonate (HCO3) 327.900 5.374 Magnesium (Mg) 23.700 1.950 Carbonate (CO3) 0.000 0.000 Sodium (Na) 13.200 0.574 Chloride (Cl) 13.100 0.370 Potassium (K) 10.100 0.258 Sulfate (SO4) <25.0 0.000 Iron (Fe) <0.003 0.000 Nitrate (as N) 16.0 P 1.142 Manganese (Mn) 0.240 0.009 Fluoride (F) <0.5 0.000 Silica (SiO2) 19.500 Orthophosphate (as P) <0.5 0.000 Total Cations 6.967 Total Anions 6.886 Trace Element Results (µg/L) Aluminum (Al): <1.0 Cesium (Cs): <0.1 Molybdenum (Mo): 0.407 Strontium (Sr): 329.000 Antimony (Sb): <0.1 Chromium (Cr): 0.403 Nickel (Ni): <0.1 Thallium (Tl): <0.1 Arsenic (As): 0.700 Cobalt (Co): 0.110 Niobium (Nb): <0.1 Thorium (Th): <0.1 Barium (Ba): 101.000 Copper (Cu): 0.770 Neodymium (Nd): <0.2 Tin (Sn): <0.1 Beryllium (Be): <0.1 Gallium (Ga): <0.1 Palladium (Pd): 0.437 Titanium (Ti): 0.189 Boron (B): 17.600 Lanthanum (La): <1.0 Praseodymium (Pr): <0.1 Tungsten (W): <0.1 Bromide (Br): <500 Lead (Pb): <0.5 Rubidium (Rb): 2.610 Uranium (U): 2.314 Cadmium (Cd): <0.1 Lithium (Li): 2.390 Silver (Ag): <0.1 Vanadium (V): 1.700 Cerium (Ce): <0.5 Mercury (Hg): NR Selenium (Se): <0.5 Zinc (Zn): 0.820 Zirconium (Zr): <0.1 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 324.78 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 491.2 Hardness as CaCO3: 306.05 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 721 Field Alkalinity as CaCO3 (mg/L): 218 PCP (µg/L): NR Lab Conductivity (µmhos): 685 Alkalinity as CaCO3 (mg/L): 269.02 Phosphorus, TD (mg/L): <0.05 Field pH: 7.43 Ryznar Stability Index: 6.797 Field Nitrate (mg/L): 8.000 Lab pH: 7.5 Sodium Adsorption Ratio: 0.3234 Field Dissolved O2 (mg/L): 8.150 Water Temp (°C): 11.8 Langlier Saturation Index: 0.351 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): 213 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.