Ground-Water Information Center Water Quality Report Site Name: GIBSON CREEK AT DRY CREEK SCHOOL ROAD GCDCSRD Report Date: 4/18/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 202210 / 262881 Sample Date: 7/13/2012 11:35:00 AM Location (TRS): 01N 04E 04 CB Agency/Sampler: MBMG / SCOTT, JEFF Latitude/Longitude: 45° 52' 16" N 111° 13' 51" W Field Number: 262881 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) 54.050 2.697 Bicarbonate (HCO3) 191.630 3.141 Magnesium (Mg) 16.830 1.385 Carbonate (CO3) 0.000 0.000 Sodium (Na) 8.280 0.360 Chloride (Cl) 3.790 0.107 Potassium (K) 2.850 0.073 Sulfate (SO4) 26.010 0.542 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.280 0.020 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.200 0.011 Silica (SiO2) 12.980 Orthophosphate (as P) <0.020 U 0.000 Total Cations 4.523 Total Anions 3.820 Trace Element Results (µg/L) Aluminum (Al): 0.430 J Cesium (Cs): <0.100 U Molybdenum (Mo): 0.950 Strontium (Sr): 302.580 Antimony (Sb): <0.100 U Chromium (Cr): 0.360 J Nickel (Ni): 1.230 Thallium (Tl): <0.100 U Arsenic (As): 0.750 Cobalt (Co): 0.140 J Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 122.310 Copper (Cu): 0.250 J Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): <0.100 U Palladium (Pd): 0.160 J Titanium (Ti): 0.460 J Boron (B): 10.810 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): 1.470 Uranium (U): 1.680 Cadmium (Cd): <0.100 U Lithium (Li): 1.090 J Silver (Ag): <0.100 U Vanadium (V): 1.740 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.180 J Zinc (Zn): <0.200 U Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 219.46 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 316.88 Hardness as CaCO3: 204.24 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 392 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 372.4 Alkalinity as CaCO3 (mg/L): 157.47 Phosphorus, TD (mg/L): NR Field pH: 8.93 Ryznar Stability Index: 7.030 Field Nitrate (mg/L): NR Lab pH: 8.11 Sodium Adsorption Ratio: 0.2436 Field Dissolved O2 (mg/L): NR Water Temp (°C): 19.7 Langlier Saturation Index: 0.540 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) 0.320 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.