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March 29, 2022 Lab ID : STK2233190 <br />Mike Wutzke Customer A-19150 <br />Quality Control - Inorganic <br />Constituent Method Date/ID Type Units Cone. I QC Data DQO I Note <br />Wet Chem <br />Nitrate +Nitrite as 450ONO3F 03/09/22:202665wh Blank mg/L ND <0.2 <br />LCS mg/L 11.22 101% 80-120 <br />MS mg/L 5.609 102% 5-285 <br />(SP2203637-001) MSD mg/L 5.609 104% .5-285 <br />MSR -PD mg/L 5.609 2.1% <30.4 <br />450ONO3F 03/09/22:203480vvh CCB Ing/[ 0.0580 0.2 <br />CCV mg/1 11.22 99.4°/a 90-110 <br />CCB mg/1 0.0590 0.2 <br />CCV I mg/1 1 11.22 1 99.2% 1 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 />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 />arc an indication of how that sample matrix affects am lytc 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 />Page 5 of 5 <br />Corporate Offices & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />04tee & Laboratory <br />853 Corporation Street <br />2500 Stagecoach Road <br />563 E. Undo Avenue <br />3442 Empresa Drive, Suite D <br />9415 W. Goshen Avenue <br />Santa Paula, CA 93060 <br />Stockton. CA 95215 <br />Chic, CA 95926 <br />San Luis Obispo, CA 93401 <br />Visalia, CA 93291 <br />TEL: (805)392-2000 <br />TEL: (209)942-0182 <br />TEL: (530)343-5818 <br />TEL: (805)783-2940 <br />TEL: (559)734-9473 <br />Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 FAX: (209)942-0423 <br />FAX: (530)343-3807 <br />FAX: (805)783-2912 <br />FAX: (559)734-8435 <br />CA ELAP Certification No. 1573 <br />CA ELAP Certification No. 1563 <br />CA ELAP Certficatlon No. 2670 <br />CA ELAP Certification No. 2775 <br />CA ELAP Certification No. 2810 <br />