Ground-Water Information Center Water Quality Report Site Name: RIVER ROAD TRAILER COURT - SYSTEM SAMPLE  Report Date: 4/19/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2001Q0977 / 184329 Sample Date: 11/15/2000 9:50:00 AM Location (TRS): 13N 19W 20 ABAB Agency/Sampler: MBMG / PMN Latitude/Longitude: 46° 52' 40" N 114° 1' 35" W Field Number: PWS0036 Datum: NAD27 Lab Date: 12/7/2000 Altitude: 00369001 Lab/Analyst: MBMG / JMC County/State: MISSOULA / MT Sample Method/Handling: PUMPED / 3120 Site Type: PUBLIC WATER SUPPLY - GW Procedure Type: DISSOLVED Geology: 110ALVM USGS 7.5' Quad: NORTHWEST MISSOULA PWS Id: 00369001 Project: PWSINV Sample Water Use: PUBLIC WATER SUPPLY Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 44.800 2.236 Bicarbonate (HCO3) 183.700 3.011 Magnesium (Mg) 12.700 1.045 Carbonate (CO3) 0.000 0.000 Sodium (Na) 5.910 0.257 Chloride (Cl) 3.010 0.085 Potassium (K) 1.990 0.051 Sulfate (SO4) 25.900 0.539 Iron (Fe) <.005 0.000 Nitrate (as N) 0.336 0.024 Manganese (Mn) <.001 0.000 Fluoride (F) 0.100 0.005 Silica (SiO2) 12.700 Orthophosphate (as P) <.05 0.000 Total Cations 3.593 Total Anions 3.665 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 178.000 Antimony (Sb): <2 Chromium (Cr): 3.470 Nickel (Ni): <2 Thallium (Tl): <5 Arsenic (As): 3.030 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 156.000 Copper (Cu): 3.820 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 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): 6.740 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1 Zinc (Zn): 2.760 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 198.15 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 291.51 Hardness as CaCO3: 164.14 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 335 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 343 Alkalinity as CaCO3 (mg/L): 150.91 Phosphorus, TD (mg/L): <.05 Field pH: 7.6 Ryznar Stability Index: 7.780 Field Nitrate (mg/L): NR Lab pH: 7.56 Sodium Adsorption Ratio: 0.2038 Field Dissolved O2 (mg/L): NR Water Temp (°C): 11.7 Langlier Saturation Index: -0.110 Field Chloride (mg/L): NR Air Temp (°C): -6 Nitrite (mg/L as N): <.05 Field Redox (mV): 9.9 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: SAMPLE COLLECTED FROM PUBLIC SUPPLY W/2 WELLS 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.