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December 27, 2021 Lab ID : STK2156869 <br /> Luhdorff& Scalmanini,Consulting Eng. Customer : 3-12023 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Sulfate 300.0 11/24/21:218412n'b CCV m I 50.00 101% 90-110 <br /> H 4500-HB STK2156844-001 Dup units 0.1% 4.80 <br /> 4500HB II/22/21:313616KQP/CT CCV units 8.00 100.3% 95-105 <br /> CCV units 8.00 100% 95-105 <br /> MBAS 5540C 11/24/21:218655jba CCB mg/l -0.0611 0.25 <br /> CCV mg/l 1.000 99.4% 90-110 <br /> CCB mg/I -0.0611 0.25 <br /> CCV I mg/1 1.000 98.9% 90-110 <br /> MBA S Extraction 5540C I1/24/21:213900jba Blank mg/L ND <0.1 <br /> LCS mg/L 0.5000 98.9% 86-114 <br /> BS mg/L 0.5000 105% 86-114 <br /> BSD mg/L 0.5000 106% 86-114 <br /> BSRPD m 0.5000 1.3% 55 <br /> Definition <br /> ICV :Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> ICB :Initial Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> CCB :Continuing Calibration Blank-Analyzed to verify the instrument baseline 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 /> M S 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 /> MSU :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 /> BS :Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not <br /> affecting analyte recovery. <br /> BSD :Blank Spike Duplicate of BSBSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that <br /> 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 /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS 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 /> </ :High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Explanation <br /> 440 :Sample nonhomojeneity may be affecting this analyte.Data was accepted based on the LCS or CCV recove <br /> Page 10 of 10 <br />