Ground-Water Information Center Water Quality Report Site Name: DRY CREEK AT FRONTAGE RD. DCFRRD Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 201630 / 265153 Sample Date: 4/27/2012 1:40:00 PM Location (TRS): 01S 05E 17 BB Agency/Sampler: MBMG / SCOTT, JEFF Latitude/Longitude: 45° 45' 28" N 111° 8' 30" W Field Number: 265153 Datum: NAD83 Lab Date: 7/3/2012 3:04:48 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, BWIP4C 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) 35.420 1.767 Bicarbonate (HCO3) 156.230 2.561 Magnesium (Mg) 10.720 0.882 Carbonate (CO3) 0.000 0.000 Sodium (Na) 6.390 0.278 Chloride (Cl) 3.350 0.095 Potassium (K) 2.430 0.062 Sulfate (SO4) 15.830 0.330 Iron (Fe) 0.034 0.001 Nitrate (as N) 0.710 0.051 Manganese (Mn) 0.005 J 0.000 Fluoride (F) 0.150 0.008 Silica (SiO2) 13.270 Orthophosphate (as P) <0.020 U 0.000 Total Cations 2.999 Total Anions 3.043 Trace Element Results (µg/L) Aluminum (Al): 37.690 Cesium (Cs): <0.100 U Molybdenum (Mo): 0.580 Strontium (Sr): 135.090 Antimony (Sb): <0.100 U Chromium (Cr): 0.140 J Nickel (Ni): 0.900 Thallium (Tl): <0.100 U Arsenic (As): 0.920 Cobalt (Co): 0.240 J Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 48.450 Copper (Cu): 0.650 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): 1.520 Boron (B): 11.710 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): 1.280 Uranium (U): 1.250 Cadmium (Cd): <0.100 U Lithium (Li): 2.670 Silver (Ag): <0.100 U Vanadium (V): 1.800 Cerium (Ce): 0.130 J Mercury (Hg): NR Selenium (Se): 0.170 J Zinc (Zn): 0.780 J Zirconium (Zr): 0.170 J Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 164.03 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 243.18 Hardness as CaCO3: 132.57 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 278 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 345.1 Alkalinity as CaCO3 (mg/L): 127.95 Phosphorus, TD (mg/L): <0.030 U Field pH: 8.61 Ryznar Stability Index: 7.687 Field Nitrate (mg/L): NR Lab pH: 8 Sodium Adsorption Ratio: 0.2268 Field Dissolved O2 (mg/L): NR Water Temp (°C): 7.2 Langlier Saturation Index: 0.156 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): 0.070 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.