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December 30, 2015 Lab ID : STK1553148 <br /> San Joaquin Regional Rail Commission Customer : 3-17703 <br /> Inorganic-Wet Chemistry QC <br /> 4500CNCE 12/16/2015:214587 All preparation quality controls are within established criteria. <br /> 5210B 12/09/2015:300456 All analysis quality controls are within established criteria. <br /> 12/04/2015:300454 All preparation quality controls are within established criteria,except: <br /> The following note applies to BOD: <br /> 440 Sample nonhomogeneity may be affecting this analyte.Data was accepted based on the LCS or CCV <br /> 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 /> Di,i 11,,ipnl by Kdly A Du h-,B.S. <br /> Approved By Kelly A.Dunnahoo,B.S. 'i11e:L bommn Di—(. <br /> Dale:2015-12-30 <br /> Page 3 of 30 <br />