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May 18, 2021 Lab ID <br />San Joaquin Co. Environmental Health Dep Customer <br />Inorganic - Wet Chemistry QC <br />STK2136230 <br />3-17919 <br />2510B <br />05/17/2021:207233 All analysis quality controls are within established criteria. <br />05/17/2021:205392 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />2540CE <br />05/11/2021:205181 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />300.0 <br />05/07/2021:206925 All analysis quality controls are within established criteria. <br />05/07/2021:205045 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />5540C <br />05/07/2021:207001 All analysis quality controls are within established criteria. <br />05/07/2021:205230 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <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 />Digitally signcd by Kelly A. D—hoo. B.S. <br />Approved By Kelly A. Dunnahoo, B.S. Title: Laboratory Director <br />Date: 2021-05-19 <br />Page 2 of 9 <br />