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Nestl6 USA, Inc., Ripon, California March 26, 2014 <br /> 2013 Annual Report <br /> TABLE OF CONTENTS <br /> Acronyms and Abbreviations ....................................................................................................... iv <br /> 1 Introduction............................................................................................................................1 <br /> 2 Groundwater Monitoring ........................................................................................................1 <br /> 2.1 Well Network for Groundwater Monitoring......................................................................1 <br /> 2.1.1 Nestl6 Monitoring Wells................................................................................................2 <br /> 2.1.2 Private Wells ................................................................................................................2 <br /> 2.1.3 City of Ripon Production Well Network........................................................................3 <br /> 2.1.4 Well Inspection and Corrective Actions ........................................................................3 <br /> 2.2 Water Level Monitoring...................................................................................................4 <br /> 2.2.1 Groundwater Flow Direction .........................................................................................4 <br /> 2.2.2 Influence of River Stage ...............................................................................................5 <br /> 2.2.3 Influence of Pumping....................................................................................................6 <br /> 2.2.4 Groundwater Mound.....................................................................................................7 <br /> 2.3 Water Quality..................................................................................................................7 <br /> 2.3.1 COC Distribution...........................................................................................................9 <br /> 2.3.2 COC Trend Analysis...................................................................................................10 <br /> 3 Ongoing and Planned Remedial Action...............................................................................13 <br /> 3.1 IRAP Operation and Maintenance................................................................................13 <br /> 3.2 IRAP Performance Monitoring......................................................................................14 <br /> 3.3 Remedial Action Plan ...................................................................................................15 <br /> 4 Other Key Activities in 2013.................................................................................................16 <br /> 4.1 High-Resolution Water-Level Monitoring Study............................................................16 <br /> 4.2 Video Surveys and MW-3 Depth Profiling ....................................................................17 <br /> 4.3 Water Replacement Contingency Plan.........................................................................17 <br /> 4.4 Water Management Plan..............................................................................................18 <br /> 4.5 Meetings with RWQCB.................................................................................................18 <br /> 4.6 Monitoring and Reporting Plan Updates.......................................................................19 <br /> 4.7 2013 Groundwater Model Update ................................................................................19 <br /> 4.8 NPDES/Water Disposal Alternatives............................................................................20 <br /> 5 Conclusions .........................................................................................................................20 <br /> 5.1 Groundwater Monitoring and Sampling .........................................................................20 <br /> 5.2 Groundwater Extraction and Treatment.........................................................................21 <br /> 5.3 Migration Control...........................................................................................................21 <br /> 6 Planned Activities and Recommendations for 2014..............................................................21 <br /> 6.1 Reporting Activities for 2014..........................................................................................22 <br /> 6.2 Recommended Field and Other Activities......................................................................22 <br /> 7 Endnotes .............................................................................................................................24 <br /> CertificationPage........................................................................................................................25 <br /> ii <br />