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May 12, 2021 Lab ID : STK2135658 <br />San Joaquin Co. Environmental Health Dep Customer A-17919 <br />Inorganic - Wet Chemistry QC <br />2510B <br />05/04/2021:206527 All analysis quality controls are within established criteria. <br />05/04/2021:204853 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />2540CE <br />04/29/2021:204691 All preparation quality controls are within established criteria (performed at FGL-SP <br />FLAP# 1573). <br />300.0 <br />04/27/2021:206329 All analysis quality controls are within established criteria. <br />04/27/2021:204541 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). <br />5540C <br />04/28/2021:206370 All analysis quality controls are within established criteria. <br />04/28/2021:204727 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 />Digilelly signed by Kelly A. Donnahoo. B.S. <br />Approved By Kelly A. Dunnahoo, B.S. ® Title: Laboramry Di—" <br />Date: 2021-05-12 <br />Page 2 of 9 <br />