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ENVIRONMENTAL <br /> Analytical Cheniists <br /> July 8, 2020 Lab ID : STK2038649 <br /> Barbara Ratto Customer : 3-17259 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQ0 Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 06/25/20:207319VVH Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 97.0% 80-120 <br /> MS mg/L 5.609 93.2% 5-285 <br /> (STK2038918-001) MSD mg/L 5.609 95.3% 5-285 <br /> MSRPD mg/L 5.609 1.4% <30.4 <br /> 450ONO3F 06/25/20:210020VVH CCB mg/L 0.159 0.2 <br /> CCV mg/L 11.22 97.1% 90-110 <br /> CCB mg/L 0.165 0.2 <br /> CCV mg/L 11.22 97.6% 90-110 <br /> Nitrate Nitrogen 450ONO3F 06/25/20:207319VVH Blank m /L ND <0.2 <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 /> 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 /> 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 /> ND :Non-detect-Result was below the DQO listed for the analyte. <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.Lindo 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 />