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GROUND WATER MONITORING WORK PL;;R <br /> DREDGE MATERIAL DISPOSAL SITE 1,ROBERTS ISLAND,PORT OF STOCKTON <br /> Table of Contents <br /> SECTION PAGE <br /> 1. INTRODUCTION..................................................................................................................1 <br /> 2. BACKGROUND ....................................................................................................................2 <br /> 2.1 Operation of DMD1 ...........................................................................................................2 <br /> 2.2 Placement of Sediment at DMD1 .....................................................................................3 <br /> 2.3 Geologic and Hydrogeologic Setting...............................................................................3 <br /> 2.3.1 Regional Setting .........................................................................................................3 <br /> 2.3.2 Local Geologic Setting 4 <br /> 2.3.3 Local Hydrogeologic Setting....................................................................................5 <br /> 2.3.4 Beneficial Uses of Water...........................................................................................5 <br /> 2.4 Potential Sources of Acidity in Valley Fill and Dredged Materials ............................6 <br /> 2.5 Previous Investigations .....................................................................................................6 <br /> 3. PROPOSED SCOPE OF WORK..........................................................................................7 <br /> 3.1 Phase 1: Dredge Material and Hydrogeologic Characterization.................................8 <br /> 3.1.1 Task 1: Permitting, Utility Clearance, and Health & Safety Plan......................8 <br /> 3.1.2 Task 2-Boring Advancement and Sample Collection........................................8 <br /> 3.1.3 Task 3-Sample Analyses.......................................................................................13 <br /> 3.1.4 Task 4-Data Evaluation and Monitor Well Recommendations......................16 <br /> 3.2 Phase 2-Monitor Well Installation and Quarterly Ground Water Monitoring.....17 <br /> 3.2.1 Task 5-Utility Location, Permitting, and Health and Safety Plan..................17 <br /> 3.2.2 Task 6 -Monitor Well Installation.........................................................................17 <br /> 3.2.3 Task 7-Quarterly Ground Water Monitoring....................................................19 <br /> 3.2.4 Task 8-Technical Report.......................................................................................20 <br /> REFERENCES.............................................................................................................................21 <br /> DISTRIBUTIONLIST..............................................................................................................23 <br /> January 2005 Page i Environmental Risk Services,Corp. <br />