Ground-Water Information Center Water Quality Report Site Name: COWAN CREEK AT DRY CREEK SCHOOL ROAD CCDCSRD Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 202720 / 262901 Sample Date: 9/6/2012 1:53:00 PM Location (TRS): 01N 04E 04 CA Agency/Sampler: MBMG / SCOTT, JEFF Latitude/Longitude: 45° 52' 14" N 111° 13' 41" W Field Number: 262901 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) 63.480 3.168 Bicarbonate (HCO3) 234.800 3.848 Magnesium (Mg) 15.860 1.305 Carbonate (CO3) 0.000 0.000 Sodium (Na) 6.610 0.288 Chloride (Cl) 5.350 0.151 Potassium (K) 3.400 0.087 Sulfate (SO4) 26.830 0.559 Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.810 0.058 Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.160 0.008 Silica (SiO2) 19.380 Orthophosphate (as P) <0.020 U 0.000 Total Cations 4.855 Total Anions 4.624 Trace Element Results (µg/L) Aluminum (Al): 0.700 J Cesium (Cs): <0.100 U Molybdenum (Mo): 0.530 Strontium (Sr): 289.130 Antimony (Sb): <0.100 U Chromium (Cr): 0.160 J Nickel (Ni): 1.580 Thallium (Tl): <0.100 U Arsenic (As): 0.850 Cobalt (Co): 0.190 J Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 125.440 Copper (Cu): 0.140 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): 0.380 J Boron (B): 9.060 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): 1.630 Uranium (U): 2.360 Cadmium (Cd): <0.100 U Lithium (Li): 1.440 J Silver (Ag): <0.100 U Vanadium (V): 1.630 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.170 J Zinc (Zn): 2.340 Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 257.11 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 376.34 Hardness as CaCO3: 223.79 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 434 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 413.6 Alkalinity as CaCO3 (mg/L): 192.74 Phosphorus, TD (mg/L): <0.030 U Field pH: 8.28 Ryznar Stability Index: 6.605 Field Nitrate (mg/L): NR Lab pH: 8.22 Sodium Adsorption Ratio: 0.2036 Field Dissolved O2 (mg/L): NR Water Temp (°C): 13.2 Langlier Saturation Index: 0.808 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) 6.230 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) 6.750 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.