Ground-Water Information Center Water Quality Report Site Name: LCWQPD - BUOY ROAD NORTH WELL (SHALLOW)  Report Date: 4/20/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q0295 / 191524 Sample Date: 8/20/2002 5:10:00 PM Location (TRS): 10N 03W 04 CABC Agency/Sampler: MBMG / JPM Latitude/Longitude: 46° 39' 8" N 111° 59' 41" W Field Number: 191524 Datum: WGS84 Lab Date: 11/25/2002 Altitude: 3710.963 Lab/Analyst: MBMG / KTH County/State: LEWIS AND CLARK / MT Sample Method/Handling: / 3120 Site Type: WELL Procedure Type: DISSOLVED Geology: 110ALVM Total Depth (ft): 25 USGS 7.5' Quad: LAKE HELENA SWL-MP (ft): 5.3 PWS Id: Depth Water Enters (ft): 15 Project: LCWQPD, GWAAMON, COLIPHAGE Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 75.600 3.772 Bicarbonate (HCO3) 278.200 4.560 Magnesium (Mg) 18.200 1.498 Carbonate (CO3) 0.000 0.000 Sodium (Na) 25.300 1.101 Chloride (Cl) 17.600 0.496 Potassium (K) 3.100 0.079 Sulfate (SO4) 67.300 1.402 Iron (Fe) 0.010 0.000 Nitrate (as N) 0.854 0.061 Manganese (Mn) 0.002 0.000 Fluoride (F) 0.429 0.023 Silica (SiO2) 22.400 Orthophosphate (as P) <.05 0.000 Total Cations 6.462 Total Anions 6.542 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 301.000 Antimony (Sb): <10 Chromium (Cr): <10 Nickel (Ni): <2 Thallium (Tl): <20 Arsenic (As): <10 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 64.200 Copper (Cu): <5 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 Boron (B): 48.500 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): 59.000 Lead (Pb): <10 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <1 Lithium (Li): 27.400 Silver (Ag): NR Vanadium (V): <10 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <15 Zinc (Zn): <2 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 366.75 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 507.8 Hardness as CaCO3: 263.68 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): NR Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 604 Alkalinity as CaCO3 (mg/L): 228.01 Phosphorus, TD (mg/L): <0.05 Field pH: NR Ryznar Stability Index: 6.917 Field Nitrate (mg/L): NR Lab pH: 7.61 Sodium Adsorption Ratio: 0.6699 Field Dissolved O2 (mg/L): NR Water Temp (°C): 10.2 Langlier Saturation Index: 0.346 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <.05 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.