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ENVIRONMENTAL <br /> Analytical Chernists <br /> January 28 , 2019 Lab ID : STK1930950 <br /> Metal Finishing Solutions , Inc . Customer : 348181 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Total Dissolved Solids (TFR) 2540CE 01 /21 / 19 :200710CTL Blank mg/L ND <20 <br /> LCS mg/L 993 . 1 9766 % 90- 110 <br /> SP 1900635-005) Dup mg/L 0.9% 5 <br /> Definition <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 /> Dup : Duplicate Sample - A random sample with each batch is prepared and analyzed in duplicate. The relative percent difference is an <br /> indication of precision for the preparation 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 /> Page 4 of 4 <br /> Corporate Offices & Laboratory Office & Laboratory Office & Laboratory Office & Laboratory Office & Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E. LindoAvenue 3442 Empresa Drive , Suite D 9415 W. Goshen Avenue <br /> Santa Paula , CA 93060 Stockton, CA 95215 Chico, CA 95926 San Luis Obispo, CA 93401 Visalia , CA 93291 <br /> TEL: (805)392-2000 TEL: (209)942-0182 TEL: (530)343-5818 TEL: (805)783-2940 TEL : (559)734-9473 <br /> Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 FAX: (209)942-0423 FAX: (530)343-3807 FAX: (805)783-2912 FAX : (559)734-8435 <br /> CA ELAP Certification No. 1573 CA ELAP Certification No. 1563 CA ELAP Certification No, 2670 CA ELAP Certification No. 2775 CA ELAP Certification No. 2810 <br />