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April 13, 2022 Lab ID : STK2234268 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Inorganic - Wet Chemistry QC <br />2540CE <br />04/01/2022:203570 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573) <br />300.0 <br />03/31/2022:204662 All analysis quality controls are within established criteria <br />03/31/2022:203511 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573) <br />5540C <br />IL <br />03/31/2022:204843 All analysis quality controls are within established criteria <br />103/31/2022:203741 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573) 11 <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:GMA <br />Digitally signed by Kelly A. Dunnahoo, B.S. <br />Approved By Kelly A. Dunnahoo, B.S. 0 nue: Laboratory Director <br />Dale: 2022.04-13 <br />Page 2 of 10 <br />