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January 28, 2019 Lab ID : STK1930714 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Inorganic - Wet Chemistry QC <br />2540CE <br />01/16/2019:200553 All preparation quality controls are within established criteria. <br />300.0 <br />01/15/2019:201007 All analysis quality controls are within established criteria. <br />01/15/2019:200761 All preparation quality controls are within established criteria, except: <br />The following note applies to Chloride, Sulfate: <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />5540C <br />01/16/2019:200728 All analysis quality controls are within established criteria. <br />01/16/2019:200561 All preparation quality controls are within established criteria. <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 />111402Q81:? <br />Di11itoBy signed by Kelly A 13—hoo, B.S. <br />Approved By Kelly A. Dunnahoo, B.S. ®True: Leb..wy Di—,. <br />Dere: 2019-01-28 <br />Page 2 of 9 <br />