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June 29, 2021 Lab ID : STK2138244 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Quality Control - Organic <br />Constituent <br />Office & Laboratory <br />Method <br />D:dc/ID <br />l) pe <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Organic <br />Stockton, CA 95215 <br />Chico, 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 />1,3-Dibromopropane <br />504 <br />06/11/21:206563JMR <br />Blank <br />ug/L <br />0.5707 <br />89.6% <br />70-130 <br />CA ELAP Certification No. 2810 <br />LCs <br />ug/L <br />0.5753 <br />102% <br />70-130 <br />LCS <br />ug/L <br />0.5705 <br />99.7% <br />70-130 <br />MS <br />ug/L <br />0.5723 <br />95.8% <br />70-130 <br />(STK2138245-001) <br />MSD <br />ug/L <br />0.5684 <br />74.2% <br />70-130 <br />MSRPD <br />ug/L <br />0.5684 <br />26.0% <br /><_30 <br />DIWII <br />;ii <br />06/11/21:206563JMR <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0,2451 <br />104% <br />70-130 <br />LCS <br />ug/L <br />0.2431 <br />102% <br />70-130 <br />Ms <br />ug/L <br />0.2438 <br />96.8% <br />70-130 <br />(STK2138245-001) <br />MSD <br />ug/L <br />0.2422 <br />70.1% <br />70-130 <br />MSRPD <br />u L <br />0.5684 <br />32.7% <br /><_30 <br />435 <br />13DBP <br />504.1 <br />06/12/21:20886 1 JMR <br />CCV <br />ug/L <br />9.975 <br />94.0% <br />70-130 <br />CCV <br />u <br />7.481 <br />1 90.9% <br />70-130 <br />DBCP <br />504.1 <br />06/12/21:208861JMR <br />CCV <br />ug/L <br />5.000 <br />90.0% <br />70-130 <br />CCV <br />ug/L <br />2.000 <br />79.0% <br />70-130 <br />Definition <br />CCV <br />: Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />Blank <br />: Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS <br />: 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 <br />: Non -detect - Result was below the DQO listed for the analyte. <br />DQO <br />Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Explanation <br />435 <br />: Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />Page 4 of 4 <br />Corporate Offices & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & Laboratory <br />Office & 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 />Chico, 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 Certification No. 2670 <br />CA ELAP Certification No. 2775 <br />CA ELAP Certification No. 2810 <br />