Ground-Water Information Center Water Quality Report Site Name: COOK RANCH  Report Date: 4/23/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2009Q0369 / 135689 Sample Date: 10/20/2008 10:02:00 AM Location (TRS): 01N 05E 04 DDAA Agency/Sampler: MBMG / DCM Latitude/Longitude: 45° 51' 48" N 111° 5' 51" W Field Number: 135689 Datum: NAD83 Lab Date: 12/19/2008 Altitude: 4507.132 Lab/Analyst: MBMG / SM County/State: GALLATIN / MT Sample Method/Handling: GRAB / 4230 Site Type: WELL Procedure Type: DISSOLVED Geology: 110SNGR, 111ALVM Total Depth (ft): 13.5 USGS 7.5' Quad: MISER CREEK SWL-MP (ft): 9.25 PWS Id: Depth Water Enters (ft): NR Project: GWAAMON, GWCP08, NGWMN-MONTANA,  BRIDGER, GWCP08MON, GALVAL Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 87.400 4.361 Bicarbonate (HCO3) 305.600 5.009 Magnesium (Mg) 12.800 1.053 Carbonate (CO3) 0.000 0.000 Sodium (Na) 4.590 0.200 Chloride (Cl) <5.0 0.000 Potassium (K) 2.700 0.069 Sulfate (SO4) <25.0 0.000 Iron (Fe) <0.004 0.000 Nitrate (as N) <0.5 P 0.000 Manganese (Mn) 0.007 0.000 Fluoride (F) <0.5 0.000 Silica (SiO2) 16.200 Orthophosphate (as P) <0.5 0.000 Total Cations 5.688 Total Anions 5.009 Trace Element Results (µg/L) Aluminum (Al): <5.25 Cesium (Cs): <0.07 Molybdenum (Mo): 0.400 Strontium (Sr): 163.000 Antimony (Sb): <0.10 Chromium (Cr): <0.12 Nickel (Ni): 0.423 Thallium (Tl): <0.02 Arsenic (As): 0.801 Cobalt (Co): 0.135 Niobium (Nb): <0.07 Thorium (Th): <0.09 Barium (Ba): 73.200 Copper (Cu): <1.98 Neodymium (Nd): <0.15 Tin (Sn): <0.16 Beryllium (Be): <0.30 Gallium (Ga): <0.12 Palladium (Pd): 0.280 Titanium (Ti): <0.40 Boron (B): 9.240 Lanthanum (La): 0.100 Praseodymium (Pr): 0.046 Tungsten (W): <0.11 Bromide (Br): <500 Lead (Pb): <0.11 Rubidium (Rb): 0.241 Uranium (U): 0.702 Cadmium (Cd): <0.25 Lithium (Li): 0.800 Silver (Ag): <0.11 Vanadium (V): 2.770 Cerium (Ce): 0.100 Mercury (Hg): NR Selenium (Se): <0.91 Zinc (Zn): 1.660 Zirconium (Zr): <0.08 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 274.94 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 430.2 Hardness as CaCO3: 270.92 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 504 Field Alkalinity as CaCO3 (mg/L): 270 PCP (µg/L): NR Lab Conductivity (µmhos): 504 Alkalinity as CaCO3 (mg/L): 250.97 Phosphorus, TD (mg/L): 0.082 Field pH: 7.3 Ryznar Stability Index: 7.038 Field Nitrate (mg/L): 0.000 Lab pH: 7.28 Sodium Adsorption Ratio: 0.1322 Field Dissolved O2 (mg/L): 6.830 Water Temp (°C): 13.5 Langlier Saturation Index: 0.121 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): -26 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.