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December 9, 2022 <br /> Lab No. : STK2256435 <br /> Luhdorff 6z Scalmanini Consulting <br /> Customer No. : 3012023 <br /> Quality Control -Wet Chem <br /> (SP 2218177-001) MSD mg/L 5.609 95.7% 66-125 <br /> MSRPD mg/L 5.609 0.2% <_30.4 <br /> Nitrite as Nitrogen 4500NO3F 11/16/2022:213053LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 101% 80-120 <br /> MS mg/L 0.6090 102% 50-150 <br /> (SP 2218177-001) MSD mg/L 0.6090 102% 50-150 <br /> MSRPD mg/L 0.6090 0.2% :530 <br /> MBAs 5540C 11/16/2022:213243JBA Blank mg/L ND <0.1 <br /> LCS mg/L 0.5000 97.2% 86-114 <br /> BS mg/L 0.5000 101% 86-114 <br /> BSD mg/L 0.5000 100% 86-114 <br /> BSRPD mg/L 0.5000 0.9% :55 <br /> Definition <br /> Blank : Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> BS : Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting <br /> analyte recovery. <br /> BSD : Blank Spike Duplicate of BS/BSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that the <br /> preparation process is not affecting analyte recovery. <br /> BSRPD : BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation and <br /> analysis. <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 17 of 17 Page 17 of 17 <br />