Ground-Water Information Center Water Quality Report Site Name: LCWQPD - PRAIRIE NEST AND LONE PRAIRIE WELL  Report Date: 4/18/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q0301 / 191548 Sample Date: 8/19/2002 12:40:00 PM Location (TRS): 10N 02W 29 DDBB Agency/Sampler: MBMG / JPM Latitude/Longitude: 46° 35' 29" N 111° 52' 40" W Field Number: 191548 Datum: WGS84 Lab Date: 11/25/2002 Altitude: 3929.217 Lab/Analyst: MBMG / KTH County/State: LEWIS AND CLARK / MT Sample Method/Handling: / 3120 Site Type: WELL Procedure Type: DISSOLVED Geology: 120SDMS Total Depth (ft): 136 USGS 7.5' Quad: EAST HELENA SWL-MP (ft): 113.03 PWS Id: Depth Water Enters (ft): 126 Project: LCWQPD, GWAAMON, COLIPHAGE,  NGWMN-MONTANA Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 54.700 2.730 Bicarbonate (HCO3) 177.100 2.903 Magnesium (Mg) 13.400 1.103 Carbonate (CO3) 0.000 0.000 Sodium (Na) 20.600 0.896 Chloride (Cl) 18.200 0.513 Potassium (K) 3.240 0.083 Sulfate (SO4) 87.400 1.821 Iron (Fe) 0.010 0.000 Nitrate (as N) 0.967 0.069 Manganese (Mn) <0.001 0.000 Fluoride (F) 0.211 0.011 Silica (SiO2) 22.200 Orthophosphate (as P) <.05 0.000 Total Cations 4.823 Total Anions 5.317 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 507.000 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): 83.900 Copper (Cu): <5 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 Boron (B): <30 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): 118.000 Lead (Pb): <10 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <1 Lithium (Li): 6.860 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): 307.29 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 397.1 Hardness as CaCO3: 191.74 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 506 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 508 Alkalinity as CaCO3 (mg/L): 145.17 Phosphorus, TD (mg/L): <0.05 Field pH: 7.73 Ryznar Stability Index: 7.360 Field Nitrate (mg/L): NR Lab pH: 7.84 Sodium Adsorption Ratio: 0.6599 Field Dissolved O2 (mg/L): NR Water Temp (°C): 11.5 Langlier Saturation Index: 0.240 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: PUMP ON 12:12 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.