Ground-Water Information Center Water Quality Report Site Name: GORDON CONST.  Report Date: 4/29/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2000Q0510 / 69147 Sample Date: 11/18/1999 10:40:00 AM Location (TRS): 13N 19W 28 CBAA Agency/Sampler: MBMG / MGR Latitude/Longitude: 46° 51' 22" N 114° 0' 45" W Field Number: 69147 Datum: NAD27 Lab Date: 1/31/2000 Altitude: 3190 Lab/Analyst: MBMG / JMC County/State: MISSOULA / MT Sample Method/Handling: PUMPED / 4220 Site Type: WELL Procedure Type: DISSOLVED Geology: 112ALVM Total Depth (ft): 78 USGS 7.5' Quad: SOUTHWEST MISSOULA SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): 78 Project: GWCP04 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 51.900 2.590 Bicarbonate (HCO3) 198.500 3.253 Magnesium (Mg) 14.400 1.185 Carbonate (CO3) 0.000 0.000 Sodium (Na) 6.730 0.293 Chloride (Cl) 5.353 0.151 Potassium (K) 1.500 0.038 Sulfate (SO4) 14.760 0.307 Iron (Fe) <.01 0.000 Nitrate (as N) 1.494 P 0.107 Manganese (Mn) <.002 0.000 Fluoride (F) 0.082 0.004 Silica (SiO2) 14.600 Orthophosphate (as P) <.05 0.000 Total Cations 4.109 Total Anions 3.823 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 118.000 Antimony (Sb): <2 Chromium (Cr): 2.130 Nickel (Ni): 3.350 Thallium (Tl): <5 Arsenic (As): <1 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 326.000 Copper (Cu): <2 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <20 Boron (B): <30 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <50 Lead (Pb): <2 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <2 Lithium (Li): <10 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1 Zinc (Zn): 17.300 Zirconium (Zr): <10 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 208.35 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 309.32 Hardness as CaCO3: 188.86 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 318 Field Alkalinity as CaCO3 (mg/L): 125 PCP (µg/L): NR Lab Conductivity (µmhos): 413 Alkalinity as CaCO3 (mg/L): 163.21 Phosphorus, TD (mg/L): <.2 Field pH: 7.6 Ryznar Stability Index: 7.504 Field Nitrate (mg/L): 0.500 Lab pH: 7.64 Sodium Adsorption Ratio: 0.2216 Field Dissolved O2 (mg/L): NR Water Temp (°C): 9.2 Langlier Saturation Index: 0.068 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): 250.1 Nitrate + Nitrite (mg/L as N) NR Hydroxide (mg/L as OH): NR 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: Lab Remarks:

Explanation: mg/L = milligrams per Liter; µg/L = micrograms per Liter; ft = feet; NR = No Reading in GWIC Qualifiers: A = Hydride atomic absorption; E = Estimated due to interference; H = Exceeded holding time; J = Estimated quantity above detection limit but below reporting limit; K = Na+K combined; N = Spiked sample recovery not within control limits; 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.