Ground-Water Information Center Water Quality Report Site Name: MAXWELL DONALD W III  Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2008Q0358 / 240108 Sample Date: 2/28/2008 2:39:00 PM Location (TRS): 01S 04E 03 BCC Agency/Sampler: / ARE Latitude/Longitude: 45° 46' 51" N 111° 13' 30" W Field Number: 34 WILDHORSE 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: 120SNGR Total Depth (ft): 100 USGS 7.5' Quad: SWL-MP (ft): 49.76 PWS Id: Depth Water Enters (ft): 98 Project: RIVERROCK, GALVAL_GW319 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 60.800 3.034 Bicarbonate (HCO3) 235.000 3.852 Magnesium (Mg) 17.300 1.424 Carbonate (CO3) 0.000 0.000 Sodium (Na) 9.200 0.400 Chloride (Cl) 9.730 0.274 Potassium (K) 2.500 0.064 Sulfate (SO4) 35.700 0.744 Iron (Fe) 0.006 0.000 Nitrate (as N) 3.29 P 0.235 Manganese (Mn) <0.001 0.000 Fluoride (F) 0.157 0.008 Silica (SiO2) 18.800 Orthophosphate (as P) 0.058 0.002 Total Cations 4.935 Total Anions 5.115 Trace Element Results (µg/L) Aluminum (Al): <1.0 Cesium (Cs): <0.1 Molybdenum (Mo): <1.0 Strontium (Sr): 400.000 Antimony (Sb): <0.1 Chromium (Cr): <0.1 Nickel (Ni): 1.750 Thallium (Tl): <0.1 Arsenic (As): 0.596 Cobalt (Co): 0.259 Niobium (Nb): <0.1 Thorium (Th): <0.05 Barium (Ba): 100.000 Copper (Cu): 4.820 Neodymium (Nd): <0.1 Tin (Sn): <0.1 Beryllium (Be): <0.1 Gallium (Ga): <0.1 Palladium (Pd): 1.120 Titanium (Ti): <1.0 Boron (B): 34.300 Lanthanum (La): <0.1 Praseodymium (Pr): <0.1 Tungsten (W): <1.0 Bromide (Br): 285.000 Lead (Pb): 1.580 Rubidium (Rb): 1.520 Uranium (U): 1.730 Cadmium (Cd): <0.1 Lithium (Li): 6.470 Silver (Ag): <1.0 Vanadium (V): 0.814 Cerium (Ce): <0.1 Mercury (Hg): NR Selenium (Se): <0.5 Zinc (Zn): 6.510 Zirconium (Zr): <0.1 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 270.88 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 390.11 Hardness as CaCO3: 223.02 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 370 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 451 Alkalinity as CaCO3 (mg/L): 192.74 Phosphorus, TD (mg/L): <0.01 Field pH: NR Ryznar Stability Index: 7.572 Field Nitrate (mg/L): NR Lab pH: 7.29 Sodium Adsorption Ratio: 0.2622 Field Dissolved O2 (mg/L): NR Water Temp (°C): 9.8 Langlier Saturation Index: -0.141 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.