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October 6, 2021 Lab ID : STK2153511 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Inorganic - Wet Chemistry QC <br />2540CE <br />09/22/2021:210990 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />300.0 <br />09/21/2021:214807 All analysis quality controls are within established criteria. <br />09/21/2021:210930 All preparation quality controls are within established criteria (performed at FGL-SP <br />FLAP# 1573). <br />5540C <br />09/21/2021:214866 All analysis quality controls are within established criteria. <br />09/21/2021:211052 All preparation quality controls are within established criteria (performed at FGL-SP <br />FLAP# 1573), except: <br />The following note applies to MBAS Extraction: <br />410 Relative Percent Difference (RPD) not within Maximum Allowable Value (MAV). Data was accepted <br />based on the LCS or CCV recovery. <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 sign d 1, Kelly A. Dun A-, B.S. <br />Approved By Kelly A. Dunnahoo, B.S. (� Title: Laborawry Di— <br />Dnte: 2021-10-06 <br />Page 2 of 9 <br />