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September 1, 2021 Lab ID : STK2151557 <br />Ynez Hernandez Customer : 3-18848 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Cont. <br />QC Data <br />DQO <br />Note <br />Wet Chem <br />Fluoride <br />300.0 <br />08/17/21:212780NJB <br />CCV <br />mg/L <br />2.500 <br />103% <br />90-110 <br />Nitrate <br />300.0 <br />08/17/21:209439NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />103% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />102% <br />85-119 <br />(STK2151557-001) <br />MSD <br />mg/L <br />40.00 <br />101% <br />85-119 <br />MSRPD <br />mg/L <br />50.00 <br />0.4% <br /><19 <br />MS <br />mg/L <br />40.00 <br />91.9% <br />85-119 <br />(VI 2146474-001) <br />MSD <br />mg/L <br />40.00 <br />91.2% <br />85-119 <br />MSRPD <br />m <br />50.00 <br />1 0.8% <br /><19 <br />300.0 <br />08/17/21:212780NJB <br />ICB <br />mg/L <br />0.000 <br />0.5 <br />ICV <br />mg/L <br />20.00 <br />104% <br />90-110 <br />CCB <br />mg/L <br />0.10 <br />0.5 <br />CCV <br />m <br />20.00 <br />103% <br />90-110 <br />Nitrate Nitrogen <br />300.0 <br />08/17/21:209439NJB <br />Blank <br />m <br />ND <br /><0.1 <br />itrite <br />300.0 <br />08/17/21:209439NJB <br />Blank <br />mg/L <br />ND <br /><0.5 <br />L.CS <br />mg/L <br />15.00 <br />102% <br />90-110 <br />MS <br />mg/L <br />30.00 <br />102% <br />74-126 <br />(STK2151557-001) <br />MSD <br />mg/L <br />30.00 <br />102% <br />74-126 <br />MSRPD <br />mg/L <br />50.00 <br />0.08% <br />_<20 <br />MS <br />mg/L <br />30.00 <br />91.2% <br />74-126 <br />(VI 2146474-001) <br />MSD <br />mg/L <br />30.00 <br />91.3% <br />74-126 <br />MSRPD <br />mg/L <br />50.00 <br />0.07% <br /><20 <br />300.0 <br />08/17/21:212780NJB <br />ICB <br />mg/L <br />0.000 <br />0.5 <br />ICV <br />mg/L <br />15.00 <br />104% <br />90-110 <br />CCB <br />mg/L <br />0.078 <br />0.5 <br />CCV <br />mg/L <br />15.00 <br />105% <br />90-110 <br />Nitrite Nitrogen <br />300.0 <br />08/17/21:209439NJB <br />Blank <br />mg/L <br />ND <br /><0.2 <br />Sulfate <br />300.0 <br />08/17/21:209439NJB <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />50.00 <br />104% <br />90-110 <br />MS <br />mg/L <br />100.0 <br />101% <br />82-124 <br />(STK2151557-001) <br />MSD <br />mg/L <br />100.0 <br />101% <br />82-124 <br />MSRPD <br />mg/L <br />50.00 <br />0.2% <br /><23 <br />MS <br />mg/L <br />100.0 <br />98.2% <br />82-124 <br />(VI 2146474-001) <br />MSD <br />mg/L <br />100.0 <br />99.1% <br />82-124 <br />MSRPD <br />m <br />50.00 <br />0.6% <br /><23 <br />300.0 <br />08/17/21:212780NJB <br />ICB <br />mg/L <br />0.192 <br />0.5 <br />ICV <br />mg/L <br />50.00 <br />104% <br />90-110 <br />CCB <br />mg/L <br />0.392 <br />0.5 <br />CCV <br />mg/L <br />50.00 <br />105% <br />90-110 <br />MBAs <br />5540C <br />08/17/21:213114jba <br />CCB <br />mg/1 <br />0.00 <br />0.1 <br />CCV <br />mg/1 <br />10.00 <br />100% <br />99-101 <br />MBAs Screen <br />5540C <br />MSmg/L <br />10.00 <br />100% <br />90-110 <br />(CC 2182848-001) <br />MSD <br />m9/L <br />10.00 <br />100% <br />90-110 <br />MSRPD <br />m L <br />10.00 <br />0.0%a <br /><0.1 <br />Definition <br />ICV : Initial Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />ICB : Initial Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />CCV : Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB : Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS : Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />: Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />MS <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />MSD <br />are an indication of how that sample matrix affects analyte recovery. <br />Page 8 of 9 <br />