Ground-Water Information Center Water Quality Report Site Name: LCWQPD - HORSESHOE BEND ROAD  Report Date: 4/23/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q0292 / 191539 Sample Date: 8/20/2002 11:45:00 AM Location (TRS): 10N 04W 13 ACDC Agency/Sampler: MBMG / JPM Latitude/Longitude: 46° 37' 26" N 112° 2' 56" W Field Number: 191539 Datum: WGS84 Lab Date: 11/25/2002 Altitude: 3832.716 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): 19 USGS 7.5' Quad: HELENA SWL-MP (ft): 9.55 PWS Id: Depth Water Enters (ft): 9 Project: LCWQPD, GWAAMON, COLIPHAGE,  NGWMN-MONTANA, BWIPSG, BWIPSGMONM Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 85.900 4.286 Bicarbonate (HCO3) 270.100 4.427 Magnesium (Mg) 24.100 1.983 Carbonate (CO3) 0.000 0.000 Sodium (Na) 29.100 1.266 Chloride (Cl) 29.000 0.818 Potassium (K) 4.900 0.125 Sulfate (SO4) 88.000 1.833 Iron (Fe) 0.052 0.002 Nitrate (as N) 2.900 0.207 Manganese (Mn) 0.005 0.000 Fluoride (F) 0.502 0.026 Silica (SiO2) 29.700 Orthophosphate (as P) <.05 0.000 Total Cations 7.678 Total Anions 7.312 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 402.000 Antimony (Sb): <10 Chromium (Cr): <10 Nickel (Ni): 2.390 Thallium (Tl): <20 Arsenic (As): 15.300 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 80.900 Copper (Cu): <5 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 Boron (B): 63.700 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): 78.000 Lead (Pb): <10 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <1 Lithium (Li): 44.000 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): 428 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 565 Hardness as CaCO3: 313.69 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 669 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 729 Alkalinity as CaCO3 (mg/L): 221.45 Phosphorus, TD (mg/L): <0.05 Field pH: 7.15 Ryznar Stability Index: 6.851 Field Nitrate (mg/L): NR Lab pH: 7.59 Sodium Adsorption Ratio: 0.7125 Field Dissolved O2 (mg/L): NR Water Temp (°C): 14.3 Langlier Saturation Index: 0.369 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: SLIGHTLY 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.