Ground-Water Information Center Water Quality Report Site Name: USGS * HOWARD RD EAST  Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1990Q0288 / 892180 Sample Date: 8/10/1990 9:50:00 AM Location (TRS): 10N 03W 11 DDCC Agency/Sampler: USGS / VMD Latitude/Longitude: 46° 37' 53" N 111° 56' 31" W Field Number: LC-1214 Datum: WGS84 Lab Date: 9/28/1990 Altitude: 3755.086 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): 40 USGS 7.5' Quad: LAKE HELENA SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 37 Project: GWAAMON Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 24.890 1.242 Bicarbonate (HCO3) 103.000 1.688 Magnesium (Mg) 9.670 0.796 Carbonate (CO3) 0.000 0.000 Sodium (Na) 14.410 0.627 Chloride (Cl) 7.500 0.212 Potassium (K) 4.000 0.102 Sulfate (SO4) 43.100 0.898 Iron (Fe) 0.127 0.005 Nitrate (as N) 0.510 0.036 Manganese (Mn) 0.255 0.009 Fluoride (F) 0.220 0.012 Silica (SiO2) 6.200 Orthophosphate (as P) NR 0.000 Total Cations 2.804 Total Anions 2.846 Trace Element Results (µg/L) Aluminum (Al): 162.000 Cesium (Cs): NR Molybdenum (Mo): <40. Strontium (Sr): 239.000 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): 32.000 Copper (Cu): 4.000 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): NR Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <4. Boron (B): <40. Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <100. Lead (Pb): NR Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <5. Lithium (Li): 13.000 Silver (Ag): <4. Vanadium (V): <4. Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): NR Zinc (Zn): <6. Zirconium (Zr): <6. Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 161.46 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 213.73 Hardness as CaCO3: 101.95 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 262 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 291.3 Alkalinity as CaCO3 (mg/L): 84.48 Phosphorus, TD (mg/L): NR Field pH: 7.55 Ryznar Stability Index: 8.954 Field Nitrate (mg/L): NR Lab pH: 7.4 Sodium Adsorption Ratio: 0.6033 Field Dissolved O2 (mg/L): NR Water Temp (°C): NR Langlier Saturation Index: -0.777 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 WITH GRAY/BLACK SEDIMENT * Field Remarks: WELL BAILED WITH COPPER BAILER * HACH NO3 = 1.4 MG/L * TITRATION FOR ALKALINITY WITH FILTERED WATER * 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.