General Overview Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting West Branch of the Grand Calumet River Highly industrialized area – foundries, distillery, chemical plants, steel mills, oil refineries, etc. Located in Hammond & East Chicago, IN Dredging - Reaches 1 & 2 – 1.3 miles stretch  Reach 1 Indianapolis Blvd to I-90 bridge  Reach 2 I-90 bridge to Columbia Ave Bridge Roxana Marsh Restoration River flows East, shallow depth 1.5/2.0’ with 10’ deep pool near HSD upstream

Project Objectives & Team Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting Objectives:  Remove contaminated sediments from marsh and river  Capping river bottom for long-term contaminant barrier  Provide habitat & aesthetic improvements  Restoration of wetlands to enhance recovery of ecological communities Team:  Agencies  GLNPO  SulTRAC – Design and Oversight  IDEM  IDNR  East Chicago Sanitary District  USACE  US Fish & Wildlife  Construction  J.F. Brennan – GC – dredging, wetlands enhancement, capping  Infrastructure Alternatives – dewatering and water treatment  Terra – Roxana Marsh excavation/sand placement, T&D of all sediments  Pizzo – invasive species control, ecological restoration & bank stabilization

Site Map Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Activity Overview Hydraulic Removal of 122,750CY - Channel and Wetland Areas 20 acres of Granular Cap placement and 6 acres - Wetland fill placement 2.5 acres of Clear and Grub - Adjacent to the river Geotextile tube Dewatering On-site water treatment – Decant water - Geotextile tubes & Roxana Marsh Offsite T&D of sediment – minimal use of stabilizing agent Mechanical Excavation 110,000 CY – land-based Roxana Marsh Placed 75,000 CY of Fill in the Roxana Marsh Herbicide treatment invasive species control – Roxana Marsh, wetlands & clear and grub areas Seeding and planting - Roxana Mash, wetlands, clear and grub areas, and invasive species control areas Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader - Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Dredging Activities 2 – 8” Swinging Ladder Hydraulic Dredges 5 SMUs and 7 Wetland Shelves 122,750 CY Removed Debris Removal Shallow Areas Turbidity Monitoring Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Invasive Species Removal in Dredge Areas Selected Areas Primary Invasive Species is Phragmites Hydraulic Dredging Sediment Removal Marine Plant to Remove Vegetative Mass Stockpiled in Roxana Marsh Footprint for later disposal at landfill Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader - Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Clear and Grub Areas Removal from selected areas – 2’ sediment and root mass Equipment and Execution Marooka track trucks Small excavator – no mats 2’ Sand Placement Currently being seeded Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Capping / Cover Wetland sand placement of 1.75’ to 3’ – fine fill sand Channel areas required 6” reactive layer – organoclay and fine fill sand Top layer 12” sand and gravel mix Broadcast Spreader System - BCS™ Land Plant Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Capping / Cover Broadcast Spreader System - BCS™ Land Plant Spreader Barge Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Organoclay for the Absorptive Layer Organoclay – A manufactured substance created by modifying Bentonite with Quaternary Amine resulting in an organophilic material Purpose Required Dosage Placement Grand Calumet River - Remediation / Roxanna Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Sediment Processing Activities Geotextile tubes for dredged material dewatering Geotextile tube filtrate collected in sump Treated on site in temporary pretreatment plant Discharged to sanitary sewer (City of East Chicago, IN) Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Processing Area Design Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Dewatering Pad & Treatment Plant Set-Up Dewatering pad liner: 40 mm HDPE, with 20 oz. geotextile mesh and 1’ of crushed stone overlay 175,000 gal sump to store storm water and geotextile tube filtrate prior to treatment 10” diameter HDPE piping throughout WTP Float controlled, self-priming 2,000 gpm influent pump Skid mounted treatment units (3) Bag filters, in parallel, with  m filters (2) pairs of lead-lag Granular Activated Carbon (GAC) vessels, in parallel, with 20,000 lbs GAC in each vessel Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Pad Construction and Equipment Installation Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Geotextile Tube Dewatering IAI designed 465’ x 280’ dewatering pad Project total design dredge volume: 126,000 yd 3 Pad capacity 10,000 – 15,000 yd 3 Active filling of geotextile tubes at one end, with haul- out at other end Pad “flipped” (rotated) 9 times during project 200’ long by 75’ circumference tubes utilized Flow polymer feed system Average 15 days of dewatering (from first day of active filling to first day of haul-out) for each tube Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Geotextile Tube Dewatering Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Water Treatment Pretreatment plant design capacity 2000 gpm Discharge to sanitary sewer under Industrial Pretreatment Program (IPP) permit IPP permit faster, easier to obtain than NDPES discharge permit 24-hour effluent composite sampling Prove-in monitoring (1 st week, daily samples collected with 24 hour turnaround on analysis from lab; weekly samples thereafter) Analytical data electronically delivered to City directly from lab Monthly flow reporting Discharge fees paid to the City were based on effluent flow volume Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Water Treatment Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Project summary Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting

Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation - Backfill of Marsh - Herbicide Treatment - Seeding & Planting Transport & Disposal - Solidification Minimal use of stabilizing agent = LKD Three load out areas CA1 - marsh CA2 - marsh CA5 – bag field 232,750 CY sent to five landfills

Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting Marsh Rehabilitation - Excavation Composite Mat roads used in the marsh One PC300HD long-reach excavator equipped with GPS Three 15 CY articulating dump trucks 14 psi ground pressure when loaded, delivering material to load out pad 110,000 CY

Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting Marsh Rehabilitation – Backfill of Marsh Two dozers D61 equipped with GPS D51 Articulating dump trucks delivering material 75,000 CY

Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting Marsh Rehabilitation– Herbicide Treatment Primary invasive target- Phragmites Herbicide applied late Summer 2011 Applied via ATV and air boat power sprayers Phragmites was mowed after treatment 12 acres treated and mowed in 2011 – track skid steer

Grand Calumet River - Remediation / Roxana Marsh - Restoration General Overview Project Objectives & Team Site Map Activity overview Dredging activities - Dredging - Invasive Species Removal - Clearing & Grubbing Capping / cover - Broadcast Spreader -Organoclay Processing Activities - Plant set-up - Dewatering - Water treatment Transport & Disposal - Solidification Marsh Rehabilitation - Excavation -Backfill of Marsh - Herbicide Treatment - Seeding & Planting Marsh Rehabilitation– Seeding & Planting Seeding & Planting Scheduled for June 2012 Native wetland species of seed & plugs Restored areas will create quality wetland habitat Invasive control will continue for 1 year 30+ acres native seed, 15,000 plugs

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