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March 2,2021 Lab ID : STK2131973 <br /> San Joaquin Co. Environmental Health Dep Customer A-17919 <br /> Inorganic-Wet Chemistry QC <br /> 2320B 02/11/2021:202087 All analysis quality controls are within established criteria. <br /> 02/11/2021:201502 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAN 1573). <br /> 2510B 02/12/2021:202121 All analysis quality controls are within established criteria. <br /> 02/12/2021:201562 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAN 1573). <br /> 2540CE 02/11/2021:201520 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAP# 1573). <br /> 300.0 02/10/2021:202114 All analysis quality controls are within established criteria. <br /> 02/10/2021:201466 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAN 1573). <br /> 4500-H B 02/15/2021:201581 All preparation quality controls are within established criteria(performed at FGL-SP <br /> ELAN 1573). <br /> 4500HB 02/15/2021:202269 All analysis quality controls are within established criteria. <br /> 5540C 02/10/2021:202358 All analysis quality controls are within established criteria. <br /> 02/10/2021:201755 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—hoo,B.S. <br /> Approved By Kelly A.Dunnahoo,B.S. ®Title:laboratory Director <br /> Date:2021-03-02 <br /> Page 2 of 9 <br />