Ground-Water Information Center Water Quality Report Site Name: LCWQPD - HELBERG LANE NORTH WELL  Report Date: 4/18/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q0358 / 191554 Sample Date: 8/26/2002 11:00:00 AM Location (TRS): 11N 03W 35 CDDD Agency/Sampler: MBMG / JPM Latitude/Longitude: 46° 39' 42" N 111° 56' 49" W Field Number: 191554 Datum: WGS84 Lab Date: 12/23/2002 Altitude: 3684.923 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): 61 USGS 7.5' Quad: LAKE HELENA SWL-MP (ft): 0.42 PWS Id: Depth Water Enters (ft): 51 Project: LCWQPD, GWAAMON, COLIPHAGE,  NGWMN-MONTANA Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 46.400 2.315 Bicarbonate (HCO3) 168.800 2.767 Magnesium (Mg) 9.650 0.794 Carbonate (CO3) 0.000 0.000 Sodium (Na) 15.300 0.666 Chloride (Cl) 5.120 0.144 Potassium (K) 2.640 0.068 Sulfate (SO4) 46.500 0.969 Iron (Fe) 0.020 0.001 Nitrate (as N) 1.380 0.099 Manganese (Mn) <0.001 0.000 Fluoride (F) 0.208 0.011 Silica (SiO2) 20.100 Orthophosphate (as P) <.05 0.000 Total Cations 3.851 Total Anions 3.989 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 338.000 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): 76.900 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): <50 Lead (Pb): <10 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <1 Lithium (Li): 10.900 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): 230.3 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 316.05 Hardness as CaCO3: 155.58 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 347 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 399 Alkalinity as CaCO3 (mg/L): 138.61 Phosphorus, TD (mg/L): <0.05 Field pH: 7.47 Ryznar Stability Index: 8.053 Field Nitrate (mg/L): NR Lab pH: 7.33 Sodium Adsorption Ratio: 0.5233 Field Dissolved O2 (mg/L): NR Water Temp (°C): 12 Langlier Saturation Index: -0.362 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.