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u � <br /> City of Ripon Weil#12 <br /> Nitrate Study Report May 31,2006 <br /> TABLE OF CONTENTS <br /> PAGE <br /> LISTOF FIGURES...................................................................................................................................iii <br /> LIST OF TABLES................................ <br /> LISTOF APPENDICES ...........................................................................................................................iii <br /> 1.0 INTRODUCTION........................................................................................................................1.1 <br /> 1.1 Background............................... ..................... ........................................................1-1 <br /> 1.2 Purpose............................................. ....... ...............................................................1-1 <br /> 2.0 DWR WELL LOG SEARCH AND COLLECTION OF OTHER INFORMATION........................2.1 <br /> 2.1 DWR Visit......................... .............................................................................................2-1 <br /> 2.2 Well Log Evaluation...—..........-............. ........................ ................................ ..............2-1 <br /> 2.3 Information from the City of Ripon..................................................................................2-2 <br /> 2.4 Contact with Well Owners...................................................................... .....................2-2 <br /> 3.0 INFORMATION REGARDING SURROUNDING SITES............................................................3.1 <br /> 3.1 Files from the City of Ripon ............................................................................................3-1 <br /> 3.2 CRWQCB File Review.,............----......................................... ......._......_.................3-1 <br /> 3.2.1 Information obtained from the RFS Files..................................................................3-1 <br /> 3.2.2 Information Obtained about the Jimcc Truck Stop Site.............................................3-2 <br /> 3.3 Information Provided by RFS...............................----..................................................3-2 <br /> 4.0 DEVELOPMENT OF WELL SAMPLING RECOMMENDATIONS ............................................4-1 <br /> 4.1 Criteria for Selection.......................................................................................................4-1 <br /> 4.2 Final Sampling Recommendations.................................................................................4.1 <br /> 4.3 RFS Site Monitoring Well Sampling Recommendations.................................................4-1 <br /> 5.0 WELL SAMPLING AND ANALYSIS .........................................................................................5-1 <br /> 5.1 SGI Sampling of Residential Wells.................................................................................5-1 <br /> 5.1.1 Method of Sampling..................................................................................................5-1 <br /> 5.1.2 Sample Handling and Analyses................................................................................5-1 <br /> 5.1.3 Equipment Decontamination.....................................................................................5-1 <br /> 5.2 SGI Sampling of RFS Monitoring Wells..........................................................................5-2 <br /> 5.2.1 Well Sampling and Analyses.................................................................... ..............5-2 <br /> 5.2.2 Equipment Decontamination.....................................................................................5-2 <br /> 5.3 Analytical Results.................................................................................... . . ..............5-3 <br /> 5.3.1 Analytical Results from Supply Wells..................................................... ..................5-3 <br /> 5.3.2 Analytical Results from Monitoring Wells..................................................................5-3 <br /> 6.0 DISCUSSION OF SAMPLING RESULTS.................................................................................6-1 <br /> 7.0 CONCLUSIONS.........................................................................................................................7-1 <br /> 8.0 REFERENCES...........................................................................................................................8-1 <br />