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March 3, 2021 Lab ID <br />San Joaquin Co. Environmental Health Dep Customer <br />Quality Control - Organic <br />: STK2132324 <br />:3-17919 <br />Constituent <br />'Method <br />Date/11) <br />Type <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Organic <br />CA ELAP Certification No. 1563 <br />1,3-Dibromopropane <br />ilia <br />02/18/21:201810JMR <br />Blank <br />ug/L <br />0.5764 <br />89.2% <br />70-130 <br />LCS <br />ug/L <br />0.5661 <br />97.2% <br />70-130 <br />LCs <br />ug/L <br />0.5731 <br />92.3% <br />70-130 <br />MS <br />ug/L <br />0.5610 <br />83.1 % <br />70-130 <br />(STK2132248-001) <br />MSD <br />ug/L <br />0.5588 <br />95.2% <br />70-130 <br />MSRPD <br />ug/L <br />0.5588 <br />13.2% <br />:530 <br />BCP <br />504 <br />02/18/21:201810JMR <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0.2412 <br />118% <br />70-130 <br />LCS <br />ug/L <br />0.2442 <br />108% <br />70-130 <br />MS <br />ug/L <br />0.2390 <br />106% <br />70-130 <br />(STK2132248-001) <br />MSD <br />ug/L <br />0.2381 <br />119% <br />70-130 <br />MSRPD <br />uRIL <br />0.5588 <br />11.3% <br />1 <_30 <br />13DBP <br />504.1 <br />02/19/21:202443JMR <br />CCV <br />ug/L <br />9.975 <br />91.6% <br />70-130 <br />CCV <br />ug/L <br />7.481 <br />82.5% <br />70-130 <br />BCP <br />504.1 <br />02/19/21:202443JMR <br />CCV <br />ug/L <br />5.000 <br />100% <br />:85.0 <br />70-130 <br />CCV <br />2 L_ <br />2.000 <br />% <br />70-130 <br />Definition <br />CCV : Continuing Calibration Verification - Analyzed to verify the instrument calibration 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 />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />MSRPD <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 />Corporate Offices & Laboratory Office & Laboratory Office & Laboratory <br />563 E. Lindo Avenue 3442 Empresa Drive, Suite D <br />Chico, CA 95926 San Luis Obispo, CA 93401 <br />TEL: (530)343-5818 TEL: (805)783-2940 <br />FAX: (530)343-3807 FAX: (805)783-2912 <br />CA ELAP Certification No. 2670 CA ELAP Certification No. 2775 <br />Office & Laboratory <br />853 Corporation Street <br />2500 Stagecoach Road <br />Santa Paula, CA 93060 <br />Stockton, CA 95215 <br />TEL: (805)392-2000 <br />TEL: (209)942-0182 <br />Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 FAX: (209)942-0423 <br />CA ELAP Certification No. 1573 <br />CA ELAP Certification No. 1563 <br />Page 4 of 4 <br />Office & Laboratory <br />9415 W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL: (559)734-9473 <br />FAX: (559)734-8435 <br />CA ELAP Certification No. 2810 <br />