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March 16, 2021 <br />In Io <br />San Joaquin Co. Environmental Health Dep Customer <br />Quality Control - Organic <br />: STK2133087 <br />:3-17919 <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Cone. <br />QC Data <br />DQO <br />Note <br />Organic <br />CA ELAP Certification No. 1563 <br />1,3-Dibromopropane <br />504 <br />03/08/21:202541JMR <br />Blank <br />ug/L <br />0.5786 <br />97.1% <br />70-130 <br />LCS <br />ug/L <br />0.5557 <br />86.2% <br />70-130 <br />LCS <br />ug/L <br />0.5640 <br />90.6% <br />70-130 <br />MS <br />ug/L <br />0.5761 <br />94.0% <br />70-130 <br />(STK2133079-001) <br />MSD <br />ug/L <br />0.5753 <br />75.9% <br />70-130 <br />MSRPD <br />ug/L <br />0.5753 <br />21.5% <br />530 <br />QMDL <br />u <br />0.5671 <br />108% <br />70-130 <br />BCP <br />504 <br />03/08/21:202541JMR <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0.2368 <br />ill % <br />70-130 <br />LCS <br />ug/L <br />0.2403 <br />118% <br />70-130 <br />MS <br />ug/L <br />0.2455 <br />134% <br />70-130 <br />435 <br />(STK2133079-001) <br />MSD <br />ug/L <br />0.2451 <br />105% <br />70-130 <br />MSRPD <br />ug/L <br />0.5753 <br />24.4% <br /><30 <br />QMDL <br />ugfL <br />0.01919 <br />124% <br />1 60-140 <br />,DBP <br />504.1 <br />03/09/21:2034381MR <br />CCV <br />ug/L <br />9.975 <br />107% <br />70-130 <br />CCV <br />u <br />7.481 <br />110% <br />70-130 <br />DBCP <br />504.1 <br />03/09/21:203438JMR <br />CCV <br />ug/L <br />5.000 <br />122% <br />70-130 <br />CCV <br />u <br />?.000 <br />122% <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 com ared. <br />Explanation <br />435 : Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <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 />