Ground-Water Information Center Water Quality Report Site Name: COOK LEW W.  Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 1992Q1203 / 9685 Sample Date: 9/1/1992 1:24:00 PM Location (TRS): 01N 05E 04 DDAD Agency/Sampler: USGS / SES Latitude/Longitude: 45° 51' 46" N 111° 5' 54" W Field Number: COOK Datum: NAD83 Lab Date: 12/24/1992 Altitude: 4500 Lab/Analyst: MBMG / SFM County/State: GALLATIN / MT Sample Method/Handling: PUMPED / 3120 Site Type: WELL Procedure Type: DISSOLVED Geology: 110SNGR, 120SICL Total Depth (ft): 80 USGS 7.5' Quad: MISER CREEK 7 1/2 SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 20 Project: USGS, GWCP08, BRIDGER Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 80.800 4.032 Bicarbonate (HCO3) 327.000 5.360 Magnesium (Mg) 14.100 1.160 Carbonate (CO3) 0.000 0.000 Sodium (Na) 14.300 0.622 Chloride (Cl) 4.370 0.123 Potassium (K) 2.000 0.051 Sulfate (SO4) 11.000 0.229 Iron (Fe) 0.007 0.000 Nitrate (as N) <.1 0.000 Manganese (Mn) <.002 0.000 Fluoride (F) 0.180 0.009 Silica (SiO2) 16.400 Orthophosphate (as P) <.05 0.000 Total Cations 5.875 Total Anions 5.721 Trace Element Results (µg/L) Aluminum (Al): <20. Cesium (Cs): NR Molybdenum (Mo): <20. Strontium (Sr): 147.000 Antimony (Sb): NR Chromium (Cr): <2. Nickel (Ni): <2. Thallium (Tl): NR Arsenic (As): <.8 Cobalt (Co): NR Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 76.400 Copper (Cu): <2. Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): NR Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): 112.000 Boron (B): 60.000 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <50. Lead (Pb): <3. Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <2. Lithium (Li): 9.000 Silver (Ag): <1. Vanadium (V): <5. Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <.8 Zinc (Zn): 25.400 Zirconium (Zr): <100. Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 303.01 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 468.93 Hardness as CaCO3: 259.79 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 509 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 499 Alkalinity as CaCO3 (mg/L): 268.2 Phosphorus, TD (mg/L): NR Field pH: 7.6 Ryznar Stability Index: 6.638 Field Nitrate (mg/L): NR Lab pH: 7.69 Sodium Adsorption Ratio: 0.378 Field Dissolved O2 (mg/L): NR Water Temp (°C): 11.7 Langlier Saturation Index: 0.526 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 Additional Parameters Phosphate T Dis (mg/L - P) L .5 Notes Sample Condition: CLEAR Field Remarks: Lab Remarks:

Explanation: mg/L = milligrams per Liter; µg/L = micrograms per Liter; ft = feet; NR = No Reading in GWIC Qualifiers: A = Hydride atomic absorption; E = Estimated due to interference; H = Exceeded holding time; J = Estimated quantity above detection limit but below reporting limit; K = Na+K combined; N = Spiked sample recovery not within control limits; 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.