Ground-Water Information Center Water Quality Report Site Name: EAST GALLATIN AT PENWELL BRIDGE EGPWBR Report Date: 4/19/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 202228 / 258311 Sample Date: 7/25/2012 8:41:00 AM Location (TRS): 01N 05E 29 AC Agency/Sampler: MBMG / SCOTT, JEFF Latitude/Longitude: 45° 48' 18" N 111° 7' 54" W Field Number: 258311 Datum: NAD83 Lab Date: 10/9/2012 7:18:15 AM Altitude: Lab/Analyst: MBMG / MCGRATH, STEVE County/State: GALLATIN / MT Sample Method/Handling: GRAB / ru:1 ra:0 fu:1 fa:2 Site Type: STREAM Procedure Type: DISSOLVED Geology: Staff Gage Reading: NR USGS 7.5' Quad: BELGRADE Stream Stage: NR PWS Id: Stream Discharge (cfs): NR  -  NR Project: BWIPMN Stream Width (ft): NR  -  NR Sample Water Use: Sample Depth (ft): NR  -  NR Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 44.930 2.242 Bicarbonate (HCO3) 211.660 3.469 Magnesium (Mg) 14.650 1.206 Carbonate (CO3) 0.000 0.000 Sodium (Na) 13.700 0.596 Chloride (Cl) 12.970 0.366 Potassium (K) 2.870 0.073 Sulfate (SO4) 18.770 0.391 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.070 0.005 Manganese (Mn) 0.006 J 0.000 Fluoride (F) 0.230 0.012 Silica (SiO2) 9.660 Orthophosphate (as P) 0.050 J 0.000 Total Cations 4.124 Total Anions 4.243 Trace Element Results (µg/L) Aluminum (Al): 4.460 Cesium (Cs): <0.100 U Molybdenum (Mo): 1.330 Strontium (Sr): 181.710 Antimony (Sb): <0.100 U Chromium (Cr): 0.120 J Nickel (Ni): 1.730 Thallium (Tl): <0.100 U Arsenic (As): 1.150 Cobalt (Co): 0.170 J Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 77.970 Copper (Cu): 0.840 Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): <0.100 U Palladium (Pd): 0.100 J Titanium (Ti): 0.470 J Boron (B): 28.020 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): <10.000 U Lead (Pb): <0.040 U Rubidium (Rb): 1.660 Uranium (U): 1.110 Cadmium (Cd): <0.100 U Lithium (Li): 2.380 Silver (Ag): <0.100 U Vanadium (V): 2.210 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.460 J Zinc (Zn): 3.190 Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 223.02 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 330.59 Hardness as CaCO3: 172.49 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 393 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 389.9 Alkalinity as CaCO3 (mg/L): 173.88 Phosphorus, TD (mg/L): 0.040 J Field pH: 8.43 Ryznar Stability Index: 7.194 Field Nitrate (mg/L): NR Lab pH: 8.02 Sodium Adsorption Ratio: 0.4638 Field Dissolved O2 (mg/L): NR Water Temp (°C): 16.6 Langlier Saturation Index: 0.413 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.010 U Field Redox (mV): NR Nitrate + Nitrite (mg/L as N) <0.200 U Hydroxide (mg/L as OH): 0.000 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) <1.000 U 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.