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June 12, 2024 <br /> Camp Gold Star Lab No. : STK2438097 <br /> Customer No. : 3019489 <br /> Quality Control -Wet Chem <br /> LCS mg/L 1.218 103% 80-120 <br /> MS mg/L 0.6090 104% 50-150 <br /> (CH 2474459-001) MSD mg/L 0.6090 104% 50-150 <br /> MSRPD mg/L 0.3% :s30 <br /> MBAS 5540C 06/05/2024:206259KRH MS mg/L 10.00 100% 90-110 <br /> (SP 2409044-001) MSD mg/L 10.00 100% 90-110 <br /> MSRPD mg/L 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 /> Page 8 of 8 Page 8 of 8 <br />