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March 16, 2021 <br />Lab ID <br />San Joaquin Co. Environmental Health Dep Customer <br />Quality Control - Organic <br />: STK2132790 <br />:3-17919 <br />Constituent <br />Method <br />Date/11) <br />l) pe <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Organic <br />CA ELAP Certification No. 1563 <br />1,3-Dibromopropane <br />Biu <br />03/05/21:202461JMR <br />Blank <br />ug/L <br />0.5716 <br />86.4% <br />70-130 <br />LCS <br />ug/L <br />0.5637 <br />75.8% <br />70-130 <br />LCs <br />ug/L <br />0.5587 <br />105% <br />70-130 <br />MS <br />ug/L. <br />0.5626 <br />81.2% <br />70-130 <br />(STK2132719-001) <br />MSD <br />ug/L <br />0.5687 <br />98.5% <br />70-130 <br />MSRPD <br />u <br />0.5687 <br />20.3% <br />:530 <br />BCP <br />504 <br />03/05/21:202461JMR <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0.2402 <br />89.2% <br />70-130 <br />LES <br />ug/L <br />0.2380 <br />130% <br />70-130 <br />MS <br />ug/L <br />0.2397 <br />112% <br />70-130 <br />(STK2132719-001) <br />MSD <br />ug/L <br />0.2423 <br />125% <br />70-130 <br />MSRPD <br />I u L <br />0.5687 <br />12.0% <br />1 :530 <br />13DBP <br />504.1 <br />03/06/21:203328JMR <br />CCV <br />ug/L <br />9.975 <br />100% <br />70-130 <br />CCV <br />ugfL <br />7.481 <br />100% <br />70-130 <br />BCP <br />504.1 <br />03/06/21:203328JMR <br />CCV <br />ug/L <br />5.000 <br />105% <br />70-130 <br />CCV <br />u <br />2.000 <br />100% <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 aljty Objective - This is the criteria against which the quality control data is com ared. <br />Corporate Offices & Laboratory Office & Laboratory Office & Laboratory <br />563 E. Undo 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 5 of 5 <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 />