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November 30, 2021 Lab ID : STK2155487 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Quality Control: All samples were prepared and analyzed according to the following tables: <br />Inorganic - Metals QC <br />200.7 10/27/2021:216840 All analysis quality controls are within established criteria. <br />10/27/2021:212506 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). <br />Inorganic - Wet Chemistry QC <br />2320B <br />11/09/2021:217454 All analysis quality controls are within established criteria. <br />11/08/2021:213008 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). <br />2510B <br />11/10/2021:217524 All analysis quality controls are within established criteria. <br />11/10/2021:213089 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). <br />2540CE <br />10/28/2021:212539 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573). <br />300.0 <br />11/24/2021:218510 All analysis quality controls are within established criteria. <br />11/24/2021:213290 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAN 1573), except: <br />The following note applies to Chloride: <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />5540C <br />11/04/2021:217200 All analysis quality controls are within established criteria. <br />10/28/2021:212825 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 />f`iI-13uii.l <br />Digitally signed by Kelly A. Dunnahoo, B.S. <br />Approved By Kelly A. Dunnahoo, B.S. 0 Title: Laboratory Director <br />Date: 2021-11-30 <br />Page 2 of 9 <br />