Ground-Water Information Center Water Quality Report Site Name: GIBSON CREEK AT DRY CREEK SCHOOL ROAD GCDCSRD Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 202722 / 262881 Sample Date: 9/6/2012 2:40:00 PM 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: 12/18/2012 7:39:08 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) 53.810 2.685 Bicarbonate (HCO3) 199.830 3.275 Magnesium (Mg) 16.590 1.365 Carbonate (CO3) 5.460 0.196 Sodium (Na) 8.520 0.371 Chloride (Cl) 4.040 0.114 Potassium (K) 3.210 0.082 Sulfate (SO4) 27.460 0.572 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.500 0.036 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.210 0.011 Silica (SiO2) 18.770 Orthophosphate (as P) <0.020 U 0.000 Total Cations 4.511 Total Anions 4.203 Trace Element Results (µg/L) Aluminum (Al): 0.710 J Cesium (Cs): <0.100 U Molybdenum (Mo): 1.000 Strontium (Sr): 292.600 Antimony (Sb): <0.100 U Chromium (Cr): 0.410 J Nickel (Ni): 6.620 Thallium (Tl): <0.100 U Arsenic (As): 0.720 Cobalt (Co): 0.200 J Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 89.730 Copper (Cu): 0.340 J Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): <0.100 U Palladium (Pd): 0.150 J Titanium (Ti): 0.430 J Boron (B): 10.290 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): 1.720 Uranium (U): 1.780 Cadmium (Cd): <0.100 U Lithium (Li): 3.400 Silver (Ag): <0.100 U Vanadium (V): 1.920 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.190 J Zinc (Zn): 0.420 J Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 236.92 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 338.4 Hardness as CaCO3: 202.65 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 397 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 380.6 Alkalinity as CaCO3 (mg/L): 172.37 Phosphorus, TD (mg/L): <0.030 U Field pH: 8.61 Ryznar Stability Index: 6.595 Field Nitrate (mg/L): NR Lab pH: 8.47 Sodium Adsorption Ratio: 0.2751 Field Dissolved O2 (mg/L): NR Water Temp (°C): 17.6 Langlier Saturation Index: 0.937 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) 0.760 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) 1.040 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: REANALYZED AND RESULTS CONFIRMED.

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.