Ground-Water Information Center Water Quality Report Site Name: THOMPSON CREEK AT DRY CREEK ROAD TCDCRD Report Date: 4/20/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 203507 / 264840 Sample Date: 3/20/2013 12:14:00 PM Location (TRS): 01N 04E 13 DD Agency/Sampler: MBMG / SCOTT/MCGIVERN Latitude/Longitude: 45° 49' 56" N 111° 9' 35" W Field Number: 264840 Datum: NAD83 Lab Date: 4/24/2013 10:09:44 PM 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) 63.310 3.159 Bicarbonate (HCO3) 260.570 4.271 Magnesium (Mg) 16.680 1.373 Carbonate (CO3) 0.000 0.000 Sodium (Na) 7.440 0.324 Chloride (Cl) 7.990 0.225 Potassium (K) 2.520 0.064 Sulfate (SO4) 20.500 0.427 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 1.120 0.080 Manganese (Mn) 0.008 J 0.000 Fluoride (F) 0.150 0.008 Silica (SiO2) 19.960 Orthophosphate (as P) <0.020 U 0.000 Total Cations 4.926 Total Anions 5.011 Trace Element Results (µg/L) Aluminum (Al): <0.400 U Cesium (Cs): <0.100 U Molybdenum (Mo): 0.510 Strontium (Sr): 208.690 Antimony (Sb): <0.100 U Chromium (Cr): 0.260 J Nickel (Ni): 0.890 Thallium (Tl): <0.100 U Arsenic (As): 0.730 Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 82.390 Copper (Cu): <0.040 U Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): <0.100 U Palladium (Pd): <0.100 U Titanium (Ti): 0.240 J Boron (B): 10.700 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): <10.000 U Lead (Pb): <0.060 U Rubidium (Rb): 0.980 Uranium (U): 1.510 Cadmium (Cd): <0.100 U Lithium (Li): <1.500 U Silver (Ag): <0.100 U Vanadium (V): 2.230 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.300 J Zinc (Zn): <0.050 U Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 268.56 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 400.99 Hardness as CaCO3: 226.74 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 444 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 438 Alkalinity as CaCO3 (mg/L): 214.06 Phosphorus, TD (mg/L): <0.030 U Field pH: 7.63 Ryznar Stability Index: 7.066 Field Nitrate (mg/L): NR Lab pH: 7.67 Sodium Adsorption Ratio: 0.2023 Field Dissolved O2 (mg/L): NR Water Temp (°C): 6.5 Langlier Saturation Index: 0.302 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) 0.990 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) 1.790 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.