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May 14, 2021 Lab ID : STK2135843 <br />San Joaquin Co. Environmental Health Dep Customer A-17919 <br />Quality Control - Organic <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />(,one. <br />QC Dail <br />D00 <br />Note <br />Organic <br />1,3-Dibromopropane <br />504 <br />05/05/21:204926JMR <br />Blank <br />ug/L <br />0.5759 <br />106% <br />70-130 <br />LCS <br />ug/L <br />0.5707 <br />102 % <br />70-130 <br />LCS <br />ug/L <br />0.5585 <br />106% <br />70-130 <br />MS <br />ug/L <br />0.5666 <br />96.9% <br />70-130 <br />(STK2135728-001) <br />MSD <br />ug/L <br />0.5753 <br />95.1 % <br />70-130 <br />MSRPD <br />ug/L <br />0.5753 <br />0.4% <br />530 <br />QMDL <br />ug/L <br />0.5679 <br />98.7% <br />70-130 <br />DBCP <br />504 <br />05/05/21:204926JMR <br />Blank <br />ug/L <br />ND <br /><0.01 <br />LCS <br />ug/L <br />0.2431 <br />108% <br />70-130 <br />LCS <br />ug/L <br />0.2380 <br />112% <br />70-130 <br />MS <br />ug/L <br />0.2414 <br />102% <br />70-130 <br />(STK2135728-001) <br />MSD <br />ug/L <br />0.2451 <br />101% <br />70-130 <br />MSRPD <br />ug/L <br />0.5753 <br />1.4% <br />:530 <br />MDL <br />ug/L <br />0.01921 <br />110% <br />60-140 <br />13DBP <br />504.1 <br />05/06/21:206651JMR <br />CCV <br />ug/L <br />7.481 <br />103% <br />70-130 <br />CCV <br />ug/L <br />9.975 <br />100% <br />70-130 <br />BCP <br />504.1 <br />05/06/21:206651JMR <br />CCV <br />ug(L <br />2.000 <br />96.5% <br />70-130 <br />CCV <br />ugfL <br />5.000 <br />89.6% <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 />: 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 />853 Corporation Street 2500 Stagecoach Road 563 E. Undo 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 />