Ground-Water Information Center Water Quality Report Site Name: COMPTON SCOTT  Report Date: 4/20/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1994Q0060 / 129925 Sample Date: 7/13/1993 12:38:00 PM Location (TRS): 01S 05E 15 BCBA Agency/Sampler: USGS / SES Latitude/Longitude: 45° 45' 14" N 111° 5' 57" W Field Number: COMPT Datum: NAD27 Lab Date: 1/5/1994 Altitude: 4518 Lab/Analyst: MBMG / SFM County/State: GALLATIN / MT Sample Method/Handling: PUMPED / 3120 Site Type: WELL Procedure Type: DISSOLVED Geology: 110ALVM Total Depth (ft): 60 USGS 7.5' Quad: SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 60 Project: USGS Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 73.600 3.673 Bicarbonate (HCO3) 311.000 5.097 Magnesium (Mg) 19.200 1.580 Carbonate (CO3) 0.000 0.000 Sodium (Na) 11.400 0.496 Chloride (Cl) 10.000 0.282 Potassium (K) 2.200 0.056 Sulfate (SO4) 20.200 0.421 Iron (Fe) 0.006 0.000 Nitrate (as N) 1.640 0.117 Manganese (Mn) <.002 0.000 Fluoride (F) 0.650 0.034 Silica (SiO2) 18.000 Orthophosphate (as P) <.15 0.000 Total Cations 5.815 Total Anions 5.951 Trace Element Results (µg/L) Aluminum (Al): <30. Cesium (Cs): NR Molybdenum (Mo): <20. Strontium (Sr): 243.000 Antimony (Sb): NR Chromium (Cr): <2. Nickel (Ni): <2. Thallium (Tl): NR Arsenic (As): <1. Cobalt (Co): <2. Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 78.200 Copper (Cu): 1.800 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2. Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <10. Boron (B): 35.000 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <100. Lead (Pb): <2. Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <2. Lithium (Li): 7.000 Silver (Ag): <1. Vanadium (V): <5. Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1. Zinc (Zn): 29.900 Zirconium (Zr): <20. Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 310.03 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 467.83 Hardness as CaCO3: 262.81 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 532 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 540 Alkalinity as CaCO3 (mg/L): 255.07 Phosphorus, TD (mg/L): NR Field pH: 7.33 Ryznar Stability Index: 7.033 Field Nitrate (mg/L): NR Lab pH: 7.42 Sodium Adsorption Ratio: 0.2953 Field Dissolved O2 (mg/L): NR Water Temp (°C): 9.2 Langlier Saturation Index: 0.194 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 Additional Parameters Nitrite Total(mg/L-N) L .1 Phosphate T Dis (mg/L - P) L .2 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: A = Hydride atomic absorption; E = Estimated due to interference; H = Exceeded holding time; J = Estimated quantity above detection limit but below reporting limit; K = Na+K combined; N = Spiked sample recovery not within control limits; 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.