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March 16, 2022 Lab ID : STK2232269 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> hiuitc 300.0 02/15/22:20176ONJB LCS mg/L 15.00 100% 90-110 <br /> Ms mg/L 30.00 98.6% 74-126 <br /> (STK2232269-001) MSD mg/L 30.00 106% 74-126 <br /> MSRPD m 10.00 7.1% <20 <br /> 300.0 02/15/22:202368njb CCB mg/1 0.00 0.5 <br /> CCV mg/I 15.00 102% 90-110 <br /> CCB mg/I 0.00 0.5 <br /> CCV m 15.00 101% 90-110 <br /> Nitrite Nitrogen 300.0 02/15/22:20176ONJB Blank m ND <0.2 <br /> Sulfate 300.0 02/15/22:20176ONJB Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 108% 90-110 <br /> MS mg/I, 100.0 104% 82-124 <br /> (STK2232269-001) MSD mg/L 100.0 ill% 82-124 <br /> MSRPD m 10.00 6.7% <23 <br /> 300.0 02/15/22:202368njb CCB mg/1 0.141 0.5 <br /> CCV mg/1 50.00 110% 90-110 <br /> CCB mg/1 0.149 0.5 <br /> CCV mg/I 50.00 109% 90-110 <br /> H 4500-H B (SP 2201986-002) Dup units 0% 4.80 <br /> 4500HB 02/18/22:202528jba CCV units 8.000 102% 95-105 <br /> CCV units 8.000 102% 95-105 <br /> %,MAS 5540C 02/16/22:202595jba CCB mg/I -0.0568 0.25 <br /> CCV mg/I 1.000 95.0% 90-110 <br /> CCB mg/1 -0.0568 0.25 <br /> CCV I mg/I 1.000 95.4% 90-110 <br /> N1BAS Extraction 5540C 02/16/22:201970jba Blank mg/L ND <0.1 <br /> LCS mg/L 0.5000 95.0% 86-114 <br /> BS mg/L 0.5000 93.7% 86-114 <br /> BSD mg/L 0.5000 97.6% 86-114 <br /> BSRPD m 0.5000 4.1% <5 <br /> Definition <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 /> MS 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 /> MSD :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 /> RPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> :Non-detect-Result was below the DQO listed for the analyte. <br /> END0 :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 8 of 8 <br />