Ground-Water Information Center Water Quality Report Site Name: LARSON BILL HWY93N12
Report Date: 3/28/2024 Compare to Water Quality Standards

Location Information
Sample Id/Site Id: 229521 / 290587 Sample Date: 4/3/2018 12:20:00 PM
Location (TRS): 12N 20W 35 CDB Agency/Sampler: MBMG / SNYDER, DEAN
Latitude/Longitude: 46° 44' 58" N 114° 4' 55" W Field Number: HW93N12
Datum: NAD83 Lab Date: 4/19/2018 10:50:13 AM
Altitude: 3179.532 Lab/Analyst: MBMG / TIMMER, JACKIE
County/State: MISSOULA / MT Sample Method/Handling: GRAB / ru:4 ra:0 fu:1 fa:2
Site Type: WELL Procedure Type: DISSOLVED
Geology: 100UDFD Total Depth (ft): 74
USGS 7.5' Quad: FLORENCE SWL-MP (ft): NR
PWS Id: Depth Water Enters (ft): 64
Project: BWIPLO, BWIPLOMONGW, BWIPLOLITH, 
BWIPLOLITH1, BWIPLOLITHX, BWIPLOLITH2
Major Ion Results
mg/L meq/L mg/L meq/L
Calcium (Ca) 22.400 1.118 Bicarbonate (HCO3) 103.740 1.700
Magnesium (Mg) 4.860 0.400 Carbonate (CO3) 0.000 0.000
Sodium (Na) 3.690 0.161 Chloride (Cl) 2.390 0.067
Potassium (K) 1.110 0.028 Sulfate (SO4) 3.940 0.082
Iron (Fe) <0.015 U 0.000 Nitrate (as N) 0.070 0.005
Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.130 0.007
Silica (SiO2) 13.530 Orthophosphate (as P) <0.020 U 0.000
Total Cations 1.707 Total Anions 1.862
Trace Element Results (µg/L)
Aluminum (Al): <2.000 U Cesium (Cs): <0.100 U Molybdenum (Mo): 0.680 Strontium (Sr): 35.630
Antimony (Sb): <0.100 U Chromium (Cr): 0.210 J Nickel (Ni): <0.100 U Thallium (Tl): <0.100 U
Arsenic (As): <0.100 U Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U
Barium (Ba): 28.720 Copper (Cu): 0.840 J Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U
Beryllium (Be): <0.100 U Gallium (Ga): 1.330 Palladium (Pd): <0.100 U Titanium (Ti): <0.100 U
Boron (B): 1.590 J 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): 1.090 Uranium (U): <0.100 U
Cadmium (Cd): <0.100 U Lithium (Li): <2.000 U Silver (Ag): <0.100 U Vanadium (V): 0.210 J
Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): <0.100 U Zinc (Zn): 1.800 J
Zirconium (Zr): <0.100 U
Field Chemistry and Other Analytical Results
**Total Dissolved Solids (mg/L): 103.49 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR
**Sum of Diss. Constituents (mg/L): 156.26 Hardness as CaCO3: 75.94 T.P. Hydrocarbons (µg/L): NR
Field Conductivity (µmhos): 160 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR
Lab Conductivity (µmhos): 155.67 Alkalinity as CaCO3 (mg/L): 85.3 Phosphorus, TD (mg/L): <0.030 U
Field pH: 8.32 Ryznar Stability Index: 8.618 Field Nitrate (mg/L): NR
Lab pH: 7.82 Sodium Adsorption Ratio: 0.1997 Field Dissolved O2 (mg/L): 1.130
Water Temp (°C): 6.1 Langlier Saturation Index: -0.399 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) <0.200 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) NR 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: CLEAR
Field Remarks: WELL IS BEING PUMPED (4 HRS INTO TEST) AT 100 GPM FOR AQUIFER TEST DURING SAMPLING
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.