Ground-Water Information Center Water Quality Report Site Name: EAGLE ROCK RANCH *WELL 1  Report Date: 4/29/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2004Q0547 / 96826 Sample Date: 6/8/2004 10:30:00 AM Location (TRS): 02S 06E 33 BDDB Agency/Sampler: MBMG / LAR Latitude/Longitude: 45° 37' 17" N 110° 59' 34" W Field Number: M:96826 Datum: NAD83 Lab Date: 7/19/2004 Altitude: 5407.52 Lab/Analyst: MBMG / WO County/State: GALLATIN / MT Sample Method/Handling: PUMPED / 4320 Site Type: WELL Procedure Type: DISSOLVED Geology: 120SDMS Total Depth (ft): 159 USGS 7.5' Quad: MOUNT ELLIS SWL-MP (ft): 47.82 PWS Id: Depth Water Enters (ft): 132 Project: GWAAMON, GWCP08, NGWMN-MONTANA,  GWCP08MON, GALVAL Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 65.800 3.283 Bicarbonate (HCO3) 252.100 4.132 Magnesium (Mg) 9.380 0.772 Carbonate (CO3) 0.000 0.000 Sodium (Na) 4.130 0.180 Chloride (Cl) 0.730 0.021 Potassium (K) 0.480 0.012 Sulfate (SO4) 3.800 0.079 Iron (Fe) 0.009 0.000 Nitrate (as N) 1.97 P 0.141 Manganese (Mn) 0.002 0.000 Fluoride (F) 0.169 0.009 Silica (SiO2) 24.700 Orthophosphate (as P) <0.05 0.000 Total Cations 4.252 Total Anions 4.381 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 213.000 Antimony (Sb): <2 Chromium (Cr): <2 Nickel (Ni): 2.320 Thallium (Tl): <5 Arsenic (As): <1 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 65.700 Copper (Cu): <2 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): <2 Rubidium (Rb): NR Uranium (U): 9.810 Cadmium (Cd): <1 Lithium (Li): 5.610 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1 Zinc (Zn): <2 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 233.32 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 361.18 Hardness as CaCO3: 202.91 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 384 Field Alkalinity as CaCO3 (mg/L): 690 PCP (µg/L): NR Lab Conductivity (µmhos): 381 Alkalinity as CaCO3 (mg/L): 206.68 Phosphorus, TD (mg/L): <0.05 Field pH: 7.54 Ryznar Stability Index: 6.823 Field Nitrate (mg/L): 1.000 Lab pH: 7.91 Sodium Adsorption Ratio: 0.1222 Field Dissolved O2 (mg/L): NR Water Temp (°C): 7.7 Langlier Saturation Index: 0.544 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR 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: ORANGE IN FLOW CELL 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.