Ground-Water Information Center Water Quality Report Site Name: LCWQPD - BUOY ROAD SOUTH WELL (DEEP)  Report Date: 5/8/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q0296 / 191525 Sample Date: 8/20/2002 4:50:00 PM Location (TRS): 10N 03W 04 CABC Agency/Sampler: MBMG / JPM Latitude/Longitude: 46° 39' 8" N 111° 59' 41" W Field Number: 191525 Datum: WGS84 Lab Date: 11/25/2002 Altitude: 3710.865 Lab/Analyst: MBMG / KTH County/State: LEWIS AND CLARK / MT Sample Method/Handling: PUMPED / 3120 Site Type: WELL Procedure Type: DISSOLVED Geology: 110ALVM Total Depth (ft): 50 USGS 7.5' Quad: LAKE HELENA SWL-MP (ft): 5.3 PWS Id: Depth Water Enters (ft): 40 Project: LCWQPD, GWAAMON, COLIPHAGE,  NGWMN-MONTANA Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 62.200 3.104 Bicarbonate (HCO3) 251.300 4.119 Magnesium (Mg) 14.300 1.177 Carbonate (CO3) 0.000 0.000 Sodium (Na) 21.100 0.918 Chloride (Cl) 13.700 0.386 Potassium (K) 2.910 0.074 Sulfate (SO4) 51.600 1.075 Iron (Fe) 0.027 0.001 Nitrate (as N) 1.160 0.083 Manganese (Mn) 0.003 0.000 Fluoride (F) 0.235 0.012 Silica (SiO2) 20.100 Orthophosphate (as P) <.05 0.000 Total Cations 5.284 Total Anions 5.675 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 264.000 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): 49.800 Copper (Cu): <5 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 Boron (B): 48.400 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <50 Lead (Pb): <10 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <1 Lithium (Li): 25.200 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): 311.15 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 438.5 Hardness as CaCO3: 214.17 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 483 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 533 Alkalinity as CaCO3 (mg/L): 205.86 Phosphorus, TD (mg/L): <0.05 Field pH: 7.2 Ryznar Stability Index: 7.345 Field Nitrate (mg/L): NR Lab pH: 7.44 Sodium Adsorption Ratio: 0.6244 Field Dissolved O2 (mg/L): NR Water Temp (°C): 12.1 Langlier Saturation Index: 0.047 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: TURBID 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.