segment 1 phase 2 work - saginawcag.org · segment 1 - selected remedies • sma 1 – cap • sma...
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SEGMENT 1 PHASE 2 WORK CAG - SEPTEMBER 16, 2013
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Segment 1 - Selected Remedies
• SMA 1 – Cap
• SMA 2, 3 &6 – (DNAPL) removal and treatment, install physical containment (cap, sheet pile)
• SMA 4 & 5 – Cap
SMA 2 DNAPL Removal & Containment
SMA 3 DNAPL Removal & Containment
SMA 6 DNAPL Removal & Containment
2013 Segment 1 Activities
SMA 1 - Cap
2013 Segment 1 Phase II Activities
DNAPL Recovery
• DNAPL recovery reconvened May
• Installed approximately 156 wells
• Installed a shore base well in SMA 2 July
• Successfully reducing the amount of DNAPL to allow for containment installations.
• Removed 5,448 liters of DNAPL in 2013, total of about 15,000 liters.
River Access System & Sonic Rig
2013 Segment 1 Phase II Activities Completed
Containment Systems
– SMA 2 July
– SMA 6U August
– SMA 3 Sept.
2013 Segment 1 Phase II Activities
Remaining activities:
• SMA 6L Containment Early October
• SMA 1 being evaluated to understand impacts from a potential NRD project with the Dow Dam
SMA Containment System
DNAPL recovery wells
SMA boundary
Existing rip/rap along edge of river
Removal of Rip Rap
Removal of Recovery Wells
Installation of Crane Mats
Installation of Sheet Pile
Installation of GCL Cap (geosynthetic clay layer)
Installation of Armor Stone
Relocate Crane Mats
Installation of GCL Cap
Installation of Armor Stone
Relocate Crane Mats
Installation of GCL Cap
Installation of Armor Stone
Remove Crane Mats
Installation of GCL Cap
Installation of Armor Stone
Replace Rip Rap
Rip-Rap Removal
Temporary ramp construction
Sheet Pile Installation
Sheet Pile Installation
Sheet Pile Installation
08-09-13 Cutting Sheet Pile – Diver Assisted
Connecting to RGIS Sheet Pile
08-13-13
SMA-6 (U)
Relocating Crane Mats
SMA 2 – Moving crane mat
Installing geosynthetic clay liner (GCL) for low permeability cap
Installing GCL
08-11-13 Stone Bags on Barge
Installing armor layer of cap
SMA 2 – Cap Abutting RGIS
Aqua-block installation
Sand Installation
Geotextile Installation
End