Ground-Water Information Center Water Quality Report Site Name: USGS * MILL ROAD  Report Date: 4/19/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1990Q0309 / 892195 Sample Date: 8/15/1990 1:30:00 PM Location (TRS): 10N 03W 08 BBAA Agency/Sampler: USGS / VMD Latitude/Longitude: 46° 38' 45" N 112° 0' 57" W Field Number: LC-1226 Datum: WGS84 Lab Date: 9/28/1990 Altitude: 3746.24 Lab/Analyst: MBMG / SSH County/State: LEWIS AND CLARK / MT Sample Method/Handling: BAILED / Site Type: WELL Procedure Type: DISSOLVED Geology: 110ALVM Total Depth (ft): 23 USGS 7.5' Quad: SCRATCHGRAVEL HILLS SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 20 Project: GWAAMON, BWIPSG, BWIPSGMONM,  NGWMN-MONTANA, BWIPNHSGSURV, MTPIN Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 48.680 2.429 Bicarbonate (HCO3) 168.000 2.754 Magnesium (Mg) 10.090 0.830 Carbonate (CO3) 0.000 0.000 Sodium (Na) 16.180 0.704 Chloride (Cl) 10.300 0.291 Potassium (K) 3.500 0.090 Sulfate (SO4) 49.300 1.027 Iron (Fe) 0.073 0.003 Nitrate (as N) 0.480 0.034 Manganese (Mn) 0.197 0.007 Fluoride (F) 0.360 0.019 Silica (SiO2) 19.300 Orthophosphate (as P) NR 0.000 Total Cations 4.082 Total Anions 4.124 Trace Element Results (µg/L) Aluminum (Al): 64.000 Cesium (Cs): NR Molybdenum (Mo): <40. Strontium (Sr): 187.000 Antimony (Sb): NR Chromium (Cr): <5. Nickel (Ni): <20. Thallium (Tl): NR Arsenic (As): NR Cobalt (Co): NR Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 49.000 Copper (Cu): <4. Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): NR Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <4. Boron (B): 46.000 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <100. Lead (Pb): NR Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): 7.000 Lithium (Li): 20.000 Silver (Ag): <4. Vanadium (V): <4. Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): NR Zinc (Zn): 109.000 Zirconium (Zr): <6. Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 239.7 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 324.94 Hardness as CaCO3: 163.08 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 425 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 403.8 Alkalinity as CaCO3 (mg/L): 137.79 Phosphorus, TD (mg/L): NR Field pH: 7.29 Ryznar Stability Index: 8.267 Field Nitrate (mg/L): NR Lab pH: 7.08 Sodium Adsorption Ratio: 0.5452 Field Dissolved O2 (mg/L): NR Water Temp (°C): 11.5 Langlier Saturation Index: -0.593 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 Phosphate T Dis (mg/L - P) L0.1 Notes Sample Condition: TURBID * BROWN SEDIMENT * Field Remarks: BAILED SAMPLE * SAMPLE COLLECTED IN BUCKET * HACH NO3 = 1.0 MG/L * Lab Remarks: ALL ANALYSES ARE DISSOLVED UNLESS NOTED OTHERWISE *

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.