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March 16, 2022 Lab ID : STK2232362 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Inorganic - Wet Chemistry QC <br />2540CE <br />02/21/2022:202002 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573) <br />300.0 <br />02/18/2022:202556 All analysis quality controls are within established criteria <br />02/18/2022:201895 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573) <br />5540C <br />02/18/2022:202597 All analysis quality controls are within established criteria <br />02/18/2022:201974 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 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 />KD:MKH <br />Digitally signed by Kelly A. Dunnahoo, B.S. <br />Approved By Kelly A. DuIlllahoo, B.S. Title: <br />Laboratory Director <br />: 2022.03.16 <br />Page 2 of 9 <br />