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ENVIRONMENTAL= . , <br /> Analytical Chernists <br /> March 20,2019 Lab ID : STK1933533 <br /> Sue Wright Customer : 3-17958 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type t nits Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrite as Nitrogen 450ONO2F MS mg/L 1.218 97.0% 50-150 <br /> (SP 1903400-001) MSD mg/L 1.218 97.2% 50-150 <br /> MSRPD m 1.218 0.3% <30 <br /> Nitrate+Nitrite as N 450ONO3F MS mg/L 28.18 36.6% 5-285 <br /> (SP 1903400-001) MSD mg/L 28.18 36.8% 5-285 <br /> MSRPD I m 28.18 0.5% <30.4 <br /> 450ONO3F 03/14/19:203672JDD CCB mg/L 0.130 0.2 <br /> CCV mg/L 11.27 92.5% 90-110 <br /> CCB mg/L 0.152 0.2 <br /> CCV m 11.27 93.3% 90-110 <br /> Nitrite as Nitrogen 450ONO3F 03/14/19:203671JDD CCB mg/L 0.00500 0.012 <br /> CCV mg/L 1.218 104% 90-110 <br /> CCB mg/L 0.01200 0.012 <br /> CCV m 1.218 99.7% 90-110 <br /> Definition <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 /> MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyte.The recoveries <br /> are an indication of how that sample matrix affects analyte recovery. <br /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 5 of 5 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853.Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />