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June 9, 2010 Lab ID : STKI033632 <br /> City of Lathrop Customer : 3-16663 <br /> Inorganic-Wet Chemistry QC <br /> 05/12/2010:204785 All preparation quality controls are within established criteria,except: <br /> The following note applies to Ammonia Nitrogen: <br /> 4500NH3B 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> The following note applies to Ammonia Nitrogen: <br /> 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> 05/19/2010:205040 All preparation quality controls are within established criteria,except: <br /> The following note applies to Ammonia Nitrogen: <br /> 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> 4500NH3G 05/13/2010:205558 All analysis quality controls are within established criteria. <br /> 05/20/2010:205875 All analysis quality controls are within established criteria. <br /> 5540C 05/04/2010:205177 All analysis quality controls are within established criteria. <br /> 05/04/2010:204468 All preparation quality controls are within established criteria. <br /> EPA351.2 05/13/2010:205565 All analysis quality controls are within established criteria. <br /> 05/28/2010:206263 All analysis quality controls are within established criteria. <br /> Certification:: I certify that this data package is in compliance with NELAC standards, both <br /> technically and for completeness, except for any conditions listed above. Release of the data contained <br /> in this data package is authorized by the Laboratory Director or his designee, as verified by the <br /> following electronic signature. <br /> KD:DMB <br /> Digitally signed by David Tea,B.A.,M.B.A. <br /> Approved By David Terz,B.A.,M.B.A. Title:QA Director <br /> Date:2010-06-10 <br /> Page 3 of 27 <br />