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EEL <br />ENVIRONMENTAL AGRICULTURAL <br />Analytical Chemists <br />June 29, 2021 Lab ID : STK2138244 <br />San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br />Quality Control - Organic <br />Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br />Organic <br />I ,3-Dibromopropane 504 06/11/21 :206563JMR Blank ug/L 0.5707 89.6% 70-130 <br />LCS ug/L 0.5753 102% 70-130 <br />LCS ug/L 0.5705 99.7% 70-130 <br />MS ug/L 0.5723 95.8% 70-130 <br />(STK2138245-001) MSD ug/L 0.5684 74.2 % 70-130 <br />MSRPD ug/L 0.5684 26.0% <30 <br />DBCP 504 06/11/21:206563JMR Blank ug/L ND <0.01 <br />LCS ug/L 0.2451 104% 70-130 <br />LCS ug/L 0.2431 102% 70-130 <br />MS ug/L 0.2438 96.8% 70-130 <br />(STK2138245-001) MSD ug/L 0.2422 70.1 % 70-130 <br />MSRPD ug/L 0.5684 32.7% <30 435 <br />I3DBP 504.1 06/12/21:208861JMR CCV ug/L 9.975 94.0% 70-130 <br />, CCV ug/L 7.481 90.9 % 70-130 <br />DBCP 504.1 06/12/21:208861JMR CCV ug/L 5.000 90.0% 70-130 <br />CCV ug/L 2.000 79.0 % 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 />Explanation <br />435 : 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 />853 Corporation Street <br />Santa Paula. CA 93060 <br />TEL: (805)392-2000 <br />Env FAX: (805)525-4172 / Ag FAX: <br />CA ELAP Certification No. 1573 <br />Office & Laboratory <br />2500 Stagecoach Road <br />Stockton, CA 95215 <br />TEL: (209)942-0182 <br />(805)392-2063 FAX: (209)942-0423 <br />CA ELAP Certification No. 1563 <br />Office & Laboratory <br />563 E. Linda Avenue <br />Chico, CA 95926 <br />TEL: (530)343-5818 <br />FAX: (530)343-3807 <br />CA ELAP Certification No. <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 />2670 CA ELAP Certification No. 2775 <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