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ENVIRONMENTAINW. . , <br /> Analytical Chemists <br /> San joaquin County <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MS mg/L 30.00 99.1 % 74-126 <br /> (STK2236233-001) MSD mg/L 30.00 104% 74-126 <br /> MSRPD mg/L 10.00 4.9% :520 <br /> MS mg/L 30.00 99.5% 74-126 <br /> (STK2236310-001) MSD mg/L 30.00 104% 74-126 <br /> MSRPD mg/L 10.00 4.4% <_20 <br /> Sulfate 300.0 05/06/2022:204982NJB Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 103% 90-110 <br /> MS mg/L 100.0 99.7% 82-124 <br /> (STK2236233-001) MSD mg/L 100.0 105% 82-124 <br /> MSRPD mg/L 10.00 4.9% <_23 <br /> MS mg/L 100.0 98.2% 82-124 <br /> (STK2236310-001) MSD mg/L 100.0 103% 82-124 <br /> MSRPD mg/L 10.00 4.3% :523 <br /> MBAS 5540C 05/06/2022:205090JBA MS mg/L 10.00 100% 90-110 <br /> (STK2236280-001) MSD mg/L 10.00 100% 90-110 <br /> MSRPD mg/L 10.00 0.0% :50.1 <br /> Definition <br /> Blank : Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <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 /> 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 matrix <br /> affects analyte recovery. <br /> MSD : Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an <br /> 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 and <br /> analysis. <br /> ND : Non-detect-Result was below the DQO listed for the analyte. <br /> Page 6 of 6 Page 6 of 6 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 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 />