Lower 8.3 Miles of the Lower Passaic River Operable Unit 2 Presentation to The Passaic River Community Advisory Group. September 14, 2017

Transcription

1 Lower 8.3 Miles of the Lower Passaic River Operable Unit 2 Presentation to The Passaic River Community Advisory Group September 14, 2017

2 Agenda Pre-Design Investigation (PDI) Status Geophysical, Bathymetric, Shoreline and Debris (GBSD) Survey Fall 2017 PDI Field Activities Sediment Processing Facility Site Selection Work Plan Summary

3 Pre-Design Investigation Status

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6 Overall Timeframe mid-2017 late 2017 through 2018 Pre-Design Investigation Pre-Design Investigation Additional Pre-Design Investigations Remedy Design Geophysical, Bathymetric Shoreline and Debris Surveys Sediment Sampling for: Chemical analysis Geotechnical characterization Waste characterization

7 Pre-Design Investigation Work Plans : General Pre-Design Investigation Work Plan (PDI WP) Appendix A Geophysical, Bathymetric, Shoreline, and Debris Survey Work Plan Appendix B Utility Survey Work Plan Appendix C-1 Sediment Core Collection and Chemical Analysis Work Plan Appendix C-2 Sediment Geotechnical Characterization Work Plan Appendix C-3 Waste Characterization Work Plan Appendix D Pore-Water Sampling and Analysis Work Plan Appendix E Water Column Sampling Work Plan Appendix F Dredging Elutriate Test and Column Settling Test Work Plan Appendix G Bulkhead and Shoreline Evaluation Work Plan Appendix H Fish Studies Work Plan Appendix I Cultural Resources Survey Work Plan Appendix J Habitat Survey Work Plan Appendix K Borrow Site Assessment Work Plan Appendix L Field Standard Operating Procedures (SOPs)

8 Status of PDI Work Plans Geophysical, Bathymetric, Shoreline, and Debris Survey Work Plan Utility Survey Work Plan Sediment Core Collection and Chemical Analysis Work Plan Sediment Geotechnical Characterization Work Plan Waste Characterization Work Plan Pore-Water Sampling and Analysis Work Plan Water Column Sampling Work Plan Dredging Elutriate Test and Column Settling Test Work Plan Bulkhead and Shoreline Evaluation Work Plan Fish Studies Work Plan Cultural Resources Survey Work Plan Habitat Survey Work Plan Borrow Site Assessment Work Plan Field Standard Operating Procedures (SOPs) Approved and implemented In preparation Regulatory review/revision Regulatory review/revision Regulatory review/revision Regulatory review/revision Regulatory review/revision Regulatory review/revision Regulatory review/revision Regulatory review/revision Regulatory comments addressed Regulatory review/revision In preparation Regulatory review/revision

9 Geophysical, Bathymetric, Shoreline and Debris (GBSD) Surveys Geophysical and bathymetric data collected to support planning for Sediment sampling Sediment pore-water sampling design Groundwater modeling Cultural resources survey requirements Habitat surveys and assessments Debris location Preliminary utility locations

10 Sediment Core Collection and Data Analysis Sediment cores collected to provide input to dredging and engineered capping design, dredged material handling, dewatering, transportation & disposal planning Chemical analysis Geotechnical characterization Waste characterization

11 Geophysical, Bathymetric, Shoreline and Debris Survey

12 Survey Operations Completed (July 2017) Bathymetric survey Multibeam (MBE) bathymetry in navigable channel Single-beam (SBE) bathymetry in shallow subtidal and intertidal zones Vessel-Mounted Light Detection and Ranging (LiDAR) along shorelines Aerial LiDAR and Photogrammetry survey of project area Geophysical/Debris survey of navigable channel Sidescan sonar (SSS) Sub-bottom profiler (SBP) Magnetometer (Mag)

13 Multibeam (MBE) Bathymetric Survey MBE coverage MBE coverage near Penn Station July Vessel configured for MBE acquisition

14 Single-Beam (SBE) Bathymetric Survey July 10 th July 22 nd

15 Vessel Mounted LiDAR (VML) Shoreline Survey July 21 st July 25 th VML system installed on survey vessel Pegasus2 Mobile Mapping System installed on survey vessel

16 Vessel Mounted LiDAR (VML) Data Examples Raw LiDAR point-cloud Pegasus 2 VML Jackson Street Bridge

17 Jackson Street Bridge LiDAR Image rotated 360 degrees

18 Jackson Street Bridge LiDAR Image rotated 360 degrees

19 Combined MBE-VML Data Examples Combined MBE and VML point cloud near Clay Street Combined MBE and VML point cloud near Clay Street Bridge

20 Photogrammetry and Aerial LiDAR Survey LiDAR Photography Acquired 9AM July 30,2017 Tide at 0.86 at 9:53AM Acquired 3-4 AM July 22,2017 Tide at -0.5 at 2:27AM

21 Geophysical and Debris Survey Completed July 24th to August 3rd Vessel configured for geophysical survey Magnetometer prepared for deployment Sidescan/Sub-bottom profiler mounted to vessel Geophysical survey acquisition tracklines

22 Geophysical and Debris Survey Examples of debris imaged in the SSS data

23 Geophysical and Debris Survey Sub-bottom profile Sidescan imagery shows abundant debris on the riverbed Mag data spikes indicate ferrous debris Geophysical data acquisition station

24 Fall 2017 PDI Field Activities

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26 Sediment Sampling Timeline Activity Timeframe Pre-mobilization activities Early August to Early October Mobilization and Site Set-up Early to mid-october Sediment Sampling Mid-October to early January 2018 Laboratory Analyses Late October to late January

27 Examples of Sediment Sampling Equipment and Activities Manual sampling Discrete interval sampling Sediment sampling to depths up to about seven feet below water surface Sediment sample collection at discrete locations and thickness Sediment sampling in deeper locations, In stronger currents or where winds or waves are present Mechanized (rig) sampling Determining the presence of gravel, clay or other non-soft sediment characteristics for design purposes Information gathering Sample preparation Dividing long sample cores into intervals (e.g. six-inches), noting and recording sediment physical characteristics, packaging intervals for delivery to the lab and preparing the Chain of Custody form to track sample handling

28 Field Sampling Methods Check Valve Corer Piston Corer Manual sampling Russian Peat Borer (RPB) Discrete interval sampling Sediment Sonic Drill Vibracore Mechanized (rig assisted) sampling Sediment Poling Information gathering Core Processing Sediment Logging Sample preparation

29 Manual Sampling

30 Manual Sampling

31 Manual Sampling with Extension Rod

32 Sonic Drill Rig

33 Sonic Drill Rig

34 Sonic Drill Rig

35 Vibracore Sampling

36 Vibracore Sampling

37 Sonic Drill Rig Courtesy of Ann Arbor Technical Services (ATS)

38 Sample Core Processing

39 Sediment Core Processing

40 Sediment Core Sample Preparation

41 Sediment Core Sample Preparation

42 Sediment Processing Facility Site Selection Work Plan Summary

43 Anticipated Processing Facility Site Activities Receipt of dredged contaminated sediment Separation of sand from sediment Dewatering of contaminated sediment Water treatment and testing prior to return to Passaic River Management and loading of dewatered sediment for transportation offsite Management and loading of separated sand for possible beneficial reuse offsite Staging of purchased sand for capping activities Staging of armor stone for capping activities Storm water management

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45 Sediment Processing Facility Site Selection Criteria Adequate size for planned sediment processing facility Proximity to greatest volume of sediment to be dredged Distance from residential development and sensitive facilities Sufficient shoreline water depth Existing environmental conditions Geotechnical properties for supporting large equipment loads Transportation of dewatered sediment rail access or via truck

46 Courtesy of Boskalis Environmental Plate & Frame Membrane Filter Presses

47 Plate & Frame Membrane Filter Presses Phase I Removal Courtesy of Boskalis Environmental

48 Mechanical Spread for Sediment Barge Off-loading Courtesy of Clean Earth

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