DRAFT - PDF document

BLM Area B Remedial Action Report (2017-2019) Former Fort Ord, California Table of Contents List of Tables…………………………………………………………………………….…..…… iii List of Figures………………………………………………………………………...…..……… iii List of Appendices…………………………………………………………………………...…... iii Acronyms and Abbreviations…………………………………………………………………… v Definitions…………………………………………………………………………………….….. viii 1 INTRODUCTION .................................................................................................................... 1 1.1 Purpose and Scope ......................................................................................................... 2 1.2 Approval Documents ....................................................................................................... 3 1.3 Project Personnel and Subcontractors ............................................................................ 3 1.4 Health and Safety ............................................................................................................ 4 1.5 Report Organization ........................................................................................................ 4 1.6 Applicable or Relevant and Appropriate Requirements ................................................... 5 2 SITE BACKGROUND ............................................................................................................. 5 2.1 .................................................................................................................... 5 Site Location 2.2 Property Transfer and Public Access .............................................................................. 5 2.3 Reuse .............................................................................................................................. 6 2.3.1 Vegetation and Habitat Type DRAFT .................................................................................... 6 2.4 Regulatory Status ............................................................................................................ 7 2.5 Site Features and History of Military Munitions Use ........................................................ 8 2.6 Summary of Munitions and Explosives of Concern-Related Activities and Data Collected Prior to the Remedial Action ....................................................................................................... 9 3 OVERVIEW OF REMEDIAL ACTION .................................................................................... 9 3.1 Remedial Action Objectives ............................................................................................. 9 3.2 MEC Remedial Action ..................................................................................................... 9 3.2.1 Remedial Action Chronology .................................................................................... 9 3.2.2 Variations from the Site-Specific Work Plan ........................................................... 10 3.2.3 Summary of Remedial Action Methods .................................................................. 10 4 SITE PREPARATION ........................................................................................................... 11 4.1 Community Relations .................................................................................................... 11 4.2 Site Security .................................................................................................................. 12 4.3 Vegetation Clearance .................................................................................................... 12 4.3.1 Burn Units ............................................................................................................... 13 4.3.2 Cut Units ................................................................................................................. 13 4.4 Debris and Target Removal ........................................................................................... 14 4.5 Grid and Border Survey ................................................................................................. 14 5 SURFACE MEC REMOVAL ................................................................................................. 14 6 DIGITAL GEOPHYSICAL MAPPING ................................................................................... 15 6.1 Instrumentation .............................................................................................................. 15 6.2 Data Acquisition Procedures ......................................................................................... 16 6.3 Geophysical System Verification and Daily Functional Tests ........................................ 16 6.4 Data Processing ............................................................................................................ 17 6.5 Measurement Quality Objectives ................................................................................... 18 i

BLM Area B Remedial Action Report (2017-2019) Former Fort Ord, California 7 SUBSURFACE MUNITIONS AND EXPLOSIVES OF CONCERN REMOVAL .................... 19 7.1 Analog Subsurface Munitions and Explosives of Concern Removal ............................. 21 7.2 Digital Subsurface Munitions and Explosives of Concern Removal .............................. 21 7.2.1 Digital Geophysical Mapping .................................................................................. 21 7.2.2 Anomaly Selection .................................................................................................. 22 7.2.3 Anomaly Reacquisition ........................................................................................... 22 7.2.4 Intrusive Target Investigation and Verification ....................................................... 22 8 QUALITY CONTROL/QUALITY ASSURANCE .................................................................... 23 8.1 Quality Control ............................................................................................................... 23 8.1.1 Analog Quality Control ........................................................................................... 23 8.1.2 Digital Geophysical Mapping Quality Control ......................................................... 24 8.2 Quality Assurance ......................................................................................................... 26 8.2.1 Analog Quality Assurance ...................................................................................... 27 8.2.2 Digital Geophysical Mapping Quality Assurance .................................................... 27 8.2.3 Corrective Action Requests .................................................................................... 27 9 MUNITIONS AND EXPLOSIVES OF CONCERN AND MUNITIONS DEBRIS REMOVAL 27 9.1 Munitions and Explosives of Concern Removal ............................................................ 27 9.2 Munitions Debris Removal ............................................................................................. 27 9.3 Detonation of Munitions and Explosives of Concern ..................................................... 28 DRAFT 9.4 Disposition of Munitions Debris ..................................................................................... 28 9.5 Munitions and Explosives of Concern and Munitions Debris Removal Summary ......... 28 10 MUNITIONS CONSTITUENTS CHARACTERIZATION .................................................... 29 10.1 Previous Site Characterization ...................................................................................... 29 10.2 Reconnaissance ............................................................................................................ 30 10.3 Site Characterization ..................................................................................................... 30 10.4 Observations of Evidence of Potential Soil Contamination............................................ 30 11 ................................................................................... 30 ENVIRONMENTAL PROTECTION 11.1 Description of Impacts and Mitigation Measures ........................................................... 30 11.2 Biological Monitoring ..................................................................................................... 32 12 PROTECTIVENESS ASSESSMENT ................................................................................ 33 13 REFERENCES .................................................................................................................. 34 ii