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April 27, 2022 Lab ID : STK2234796 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Inorganic - Wet Chemistry QC <br />2540CE <br />04/12/2022:203987 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />300.0 <br />04/19/2022:205691 All analysis quality controls are within established criteria. <br />04/19/2022:204276 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573), except: <br />The following note applies to Chloride: <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />4500NO2B <br />04/12/2022:205189 All analysis quality controls are within established criteria. <br />04/09/2022:203997 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />4500NO3F <br />04/12/2022:205212 All analysis quality controls are within established criteria. <br />04/12/2022:204003 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). <br />5540C <br />04/09/2022:205054 All analysis quality controls are within established criteria. <br />04/09/2022:203911 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). ji <br />Certification:: I certify that this data package is in compliance with ELAP standards, both technically <br />and for completeness, except for any conditions listed above. Release of the data contained in this data <br />package is authorized by the Laboratory Director or his designee, as verified by the following electronic <br />signature. <br />KD:MKH <br />Digitally signed by Kelly A. Dunnahco, B.S. <br />Approved By Kelly A. Dunnahoo, B.S. 0 Title: Laboratory Dinec[or <br />Date: 2022-04-27 <br />Page 2 of 9 <br />