Ground-Water Information Center Water Quality Report Site Name: VALLEY WEST TRAILER COURT PUBLIC WATER SUPPLY SYSTEM SAMPLE  Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2001Q0966 / 184164 Sample Date: 11/2/2000 10:30:00 AM Location (TRS): 12N 20W 34 DDCC Agency/Sampler: MBMG / PMN Latitude/Longitude: 46° 44' 53" N 114° 5' 33" W Field Number: Datum: NAD27 Lab Date: 11/30/2000 Altitude: 00444001 Lab/Analyst: MBMG / JMC County/State: MISSOULA / MT Sample Method/Handling: PUMPED / 3120 Site Type: PUBLIC WATER SUPPLY - GW Procedure Type: DISSOLVED Geology: 111ALVM USGS 7.5' Quad: FLORENCE PWS Id: 00444001 Project: PWSINV, BWIPLOLITHX Sample Water Use: PUBLIC WATER SUPPLY Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 18.600 0.928 Bicarbonate (HCO3) 88.100 1.444 Magnesium (Mg) 4.930 0.406 Carbonate (CO3) 0.000 0.000 Sodium (Na) 3.120 0.136 Chloride (Cl) 1.240 0.035 Potassium (K) 1.070 0.027 Sulfate (SO4) 2.540 0.053 Iron (Fe) <.005 0.000 Nitrate (as N) 0.058 0.004 Manganese (Mn) <.001 0.000 Fluoride (F) <.05 0.000 Silica (SiO2) 13.300 Orthophosphate (as P) <.05 0.000 Total Cations 1.498 Total Anions 1.536 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 39.600 Antimony (Sb): <2 Chromium (Cr): 2.450 Nickel (Ni): <2 Thallium (Tl): <5 Arsenic (As): <1 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 29.400 Copper (Cu): <2 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): 1.660 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1 Zinc (Zn): 3.360 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 87.88 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 132.53 Hardness as CaCO3: 66.74 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 143 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 150 Alkalinity as CaCO3 (mg/L): 72.18 Phosphorus, TD (mg/L): <.05 Field pH: 7.7 Ryznar Stability Index: 9.114 Field Nitrate (mg/L): NR Lab pH: 7.63 Sodium Adsorption Ratio: 0.1598 Field Dissolved O2 (mg/L): NR Water Temp (°C): 7.1 Langlier Saturation Index: -0.742 Field Chloride (mg/L): NR Air Temp (°C): 10 Nitrite (mg/L as N): <.05 Field Redox (mV): NR 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: Field Remarks: SAMPLE FROM SYSTEM SUPPLIED BY 5 WELLS M#S 171788/ 171789/ 67449/ 67457/ 67458 COLIFORM ABSENT 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.