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February 2, 2022 Lab ID : STK2230658 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Inorganic - Wet Chemistry QC <br />2540CE <br />01/14/2022:200488 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573). <br />300.0 <br />01/13/2022:200772 All analysis quality controls are within established criteria. <br />01/13/2022:200461 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 1573), except: <br />The following note applies to Nitrate: <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />5540C <br />01/13/2022:200921 All analysis quality controls are within established criteria. <br />01/13/2022:200706 All preparation quality controls are within established criteria (performed at FGL-SP <br />ELAP# 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:MKH <br />Digitally signed by Kelly A. Dunnahoo, B.S. <br />Approved By Kelly A. Dunnahoo, B.S. 0 Dae:Laboat-Director <br />Date: 2022.02-002 <br />Page 2 of 8 <br />