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October 19, 2021 Lab ID : STK2154077 <br /> San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br /> Inorganic - Wet Chemistry QC <br /> 2540CE 10/05/2021:211543 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAP# 1573) <br /> 300.0 10/01/2021:215448 All analysis quality controls are within established criteria <br /> 10/01/2021:211396 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAP# 1573) <br /> 5540C 10/01/2021:215464 All analysis quality controls are within established criteria <br /> 10/01/2021:211493 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:DMB <br /> Digitally signed by Kelly A.D—.hao.B.S. <br /> Approved By Kelly A.Dunnahoo,B.S. Till..Laho—q Director <br /> Date:2021-10-20 <br /> Page 2 of 9 <br />