Final Remedial Action Completion Report for the ... - Rvaap.org

Remedial Action Completion Report
June 2008
Remediation of Soils and Dry Sediments at RVAAP 08-11 (LLs 1-4)
Page vii
TABLE OF CONTENTS
1.0 INTRODUCTION.......................................................................................................... 1-1
1.1 Purpose and Scope...........................................................................................................1-1
1.2 Site Description and Background ....................................................................................1-1
1.2.1 Load Lines 1 - 4..................................................................................................1-5
1.3 Nature and Extent of Contamination ...............................................................................1-5
2.0 PROJECT DESCRIPTION .......................................................................................... 2-1
2.1 Summary of Record of Decision......................................................................................2-1
2.1.1 Remedial Action Objectives ...............................................................................2-1
2.2 Summary of Remedial Action Work Plan .......................................................................2-2
2.3 Post-ROD Changes to the Selected Remedy ...................................................................2-3
2.3.1 Groundwater Monitoring ....................................................................................2-3
2.3.2 Concrete Slab Maintenance ................................................................................2-3
3.0 CONSTRUCTION ACTIVITIES ................................................................................ 3-1
3.1 Premobilization................................................................................................................3-1
3.1.1 Required Permits/Clearances..............................................................................3-1
3.1.2 Traffic Coordination and Routing.......................................................................3-1
3.1.3 Pre-Construction Survey.....................................................................................3-1
3.1.4 Pre-Construction Meeting...................................................................................3-2
3.2 Baseline Groundwater Sampling .....................................................................................3-2
3.2.1 Well Redevelopment...........................................................................................3-2
3.2.2 Field Measurements............................................................................................3-3
3.2.3 Purging Methods.................................................................................................3-3
3.2.4 Sample Collection...............................................................................................3-3
3.2.5 Filtration Procedures...........................................................................................3-4
3.2.6 Field Quality Control Sampling Procedures .......................................................3-4
3.2.7 Decontamination Procedures ..............................................................................3-4
3.2.8 Summary of Groundwater Sample Results.........................................................3-4
3.2.8.1 Volatile Organic Compounds ................................................................3-5
3.2.8.2 Semi-Volatile Organic Compounds.......................................................3-5
3.2.8.3 Explosives and Propellants ....................................................................3-5
3.2.8.4 Inorganics ..............................................................................................3-6
3.2.8.5 Pesticides and PCBs ..............................................................................3-7
3.3 Mobilization and Site Preparation ...................................................................................3-7
3.3.1 Temporary Facilities...........................................................................................3-8
3.3.2 Sign Placement ...................................................................................................3-9
3.2.2.1 Safety Signs ...........................................................................................3-9
3.2.2.2 Traffic Control Signs .............................................................................3-9
3.3.3 Site Security........................................................................................................3-9
3.3.4 Erosion and Sediment Control............................................................................3-9
3.3.5 Clearing and Grubbing......................................................................................3-10
3.3.6 Source of Water Usage .....................................................................................3-10
3.3.7 Dust Management.............................................................................................3-10
3.3.8 Protection of Existing Monitoring Wells..........................................................3-11
3.4 Excavation .....................................................................................................................3-11
***FINAL***