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May 3, 2021 <br />Lab ID <br />San Joaquin Co. Environmental Health Dep Customer <br />Quality Control - Organic <br />: STK2135656 <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 />1,3-Dibromopropane <br />504 <br />04/27/21:204599JMR <br />Blank <br />ug/L <br />0.5786 <br />94.3% <br />70-130 <br />LCS <br />ug/L <br />0.5663 <br />106% <br />70-130 <br />MS <br />ug/L <br />0.5695 <br />107% <br />70-130 <br />(STK2135343-001) <br />MSD <br />ug/L <br />0.5682 <br />104% <br />70-130 <br />MSRPD <br />ug/L <br />0.5682 <br />3.1% <br />:530 <br />QMDL <br />u <br />0.5708 <br />110 % <br />70-130 <br />DBCP <br />504 <br />04/27/21:204599JMR <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0.2413 <br />108% <br />70-130 <br />MS <br />ug/L <br />0.2427 <br />110% <br />70-130 <br />(STK2135343-001) <br />MSD <br />ug/L <br />0.2421 <br />108% <br />70-130 <br />MSRPD <br />ug/L <br />0.5682 <br />1.7% <br />530 <br />MDL <br />ug/L <br />0.01931 <br />130% <br />60-140 <br />13DBP <br />504.1 <br />04/28/21:206180JMR <br />CCV <br />ug/L <br />7.481 <br />102% <br />70-130 <br />CCV <br />I ug/L <br />9.975 <br />109 % <br />70-130 <br />DBCP <br />504.1 <br />04/28/21:206180JMR <br />CCV <br />ug/L <br />2.000 <br />97,5% <br />70-130 <br />CCV <br />u L <br />5.000 <br />94.0% <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 />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 />are an indication of how that sample matrix affects analyte 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 />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 />853 Corporation Street 2500 Stagecoach Road 563 E. Lindo Avenue <br />Santa Paula, CA 93060 Stockton, CA 95215 Chico, CA 95926 <br />TEL: (805)392-2000 TEL: (209)942-0182 TEL: (530)343-5818 <br />Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 FAX: (209)942-0423 FAX: (530)343-3807 <br />CA ELAP Certification No. 1573 CA ELAP Certification No. 1563 CA ELAP Certification No. 2670 <br />Office & Laboratory <br />3442 Empresa Drive, Suite D <br />San Luis Obispo, CA 93401 <br />TEL: (805)783-2940 <br />FAX: (805)783-2912 <br />CA ELAP Certification No. 2775 <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 />