1. Lake clean-up process

2. 1. Project overview The compressed air can reach into the contaminated area to treat, and contaminated materials are separating by micro air bubbles. And then micro bubbles with contaminated material in water column and sediment bed shall foaming up and floating into the water surface, the mechanism is similar with DAF(Dissolved Air Flotation) in water treatment facility. Polluted water column and sediment layer Air jet system for water column and sediment layer Collection sludge in water column and sediment layer through DAF technic using micro bubble. After the clean-up, Restoration and remediation the lake, easier and faster the process

3. Process step for clean upDetail description 1Water analysis and identify the clean-up Pollution review Pollution source and identification 2Method review and applicationClean-up process design 3Select adequate technicsSet the clean up target 4Plan and schedulingunder the applicable technics 5Implementation and operationClean up sytem 6Appraisal the effectivenessMonitoring and verification 7Quality managementValidation for the effectiveness 8ReportingEvaluation the process 9Closing- Project Process 1. Project process

4. Air Jet System 2. Overview of Work Boat(Air Jet System) 1 1 2 2 3 3 1 1 2 2 3 3 Air jet system Roller Brush Collection net

5. 2. Overview of Work Boat (Desilting and Dredging system) 1 1 2 2 3 3 1 1 2 2 3 3 Generator Main Engine Pump Desilting and Dredging system

6. 2. Equipment Specification PartsEquip.MaterialsDimensionRemarks Air Jet System Boat Generator50 A Compressor175 Air TankSUS steel1 – 7 kg/cm 2 Air regulator NozzleSteel Under 30 micrometer Micro bubble Hosepp3 AUnder the condition Engine, screw and rudder, steering wheel FRP Boat 500 X 700 X 90 cm 500 Hp Slow speed Work Boat IIPump & Rotary head Barge Boat600 X 900 X 90 cmDredging barge Collection Net Filter and net with enhanced belt Polyester Net 600 X 1200 X 600(Depth) Under the depth Waste Collection Devise Collection HeadSteel devise500 X 70 cmSpecified rake Desilting & dredging pump Desilting rotary and suction type Vacuum suction head with rotary developer 500 X 70 X 90 cm Special design, To be developed under the project condition Sludge transfer Sludge pump Transfer hose Work Station Rotary pump Pressure enhanced hose Wood station 10 X 8 inch pump, impeller, caterpillars Crain system

7. Capacity(unit/day)Utility Waste collection5,000 m 3 /dayWork boat and collection head Desilting and dredging2,000 m 3 /day Depth can be adjusted by height controller device in the boat. Available the depth is 0.5 meter to 10 meter height in lake. Water Clean-up2,000 m 3 /day Sludge transfer30 m 3 /dayTransfer pump Power SourceSpecificationUse ( liter/day) GeneratorDiesel10 l/day CompressorDiesel50 l/day Motor EngineGasoline30 l/day Main EngineDiesel50 l/day Demand Capacity 2. Equipment Specification

8. Air Jet System process step 3. Process Step 1. Clean-up line and safety device installation ⇨ 2. Water sampling and test ⇨ 3. Protect device install ⇨ 4. Water diffusion protect membrane installation ⇨ 5. Transfer equipment ⇨ 6. Fabrications ⇨ 7. Launch ⇨ 8. Safety training ⇨ 9. Set-up and operation ⇨ 10. Sludge collection ⇨ 11. Dehydration and store the sludge ⇨ 12. Transfer sludge ⇨ 13. Truck for logistics ⇨ 14. Transfer to truck ⇨ 15. Sludge hauler or treatment

9. 친환경 다목적 환경정화기술 3. Equipment & Operations 9 Work Process of Air Jet System System installation process Work Scope design System installation and preliminary operation Treatment with the system (micro-airbubble) Work Scope design System installation and preliminary operation Treatment with the system (micro-air bubble) Floatation suspended solids Collection suspended solids Dehydration Remove and treat sludge 1. Transport work station 2. Fabrication 3. Launching the unit 4. Operation 5. SS collector 6. Floating solids

10. 친환경 다목적 환경정화기술 Project NameYearDimensionChracteristics Herbei Spirit – oil pollution, Chunri-po, Taean, ChungNam-do 2007 12 ~ 2009 05Project area, emergency instruction from Korea Coast Guard Sea Beach, precipitation oil decomposition and clean up ImjinGak Lake, Gyunggi-do 2010. 05100,000 m 2 Artificial Dam Ilsan Lake Park, Gyunggi-do 2011 04 ~ 09 2012 04 ~ 09 2013 04 ~ 09 300,000 m 2 Depth 0.5 ~ 1.5 meter Artificial lake Bottom caution from the design Songdo Sea water Canal, Incheon 2012. November26,000 m 2 Depth 1 ~ 3 meter Artificial Moss and organic material contamination Ilsan eco-canal, Gyunggi-do 2014. 04 ~30,000 m 2 Depth 0.5 ~ 1.5 meter Artificial Organic material, clay and sewage contamination Olympic park – lake, Seoul 2014 04~70,000 m 2 Depth 0.5 ~ 3 meter Artificial and natural 4. Track Records

11. 친환경 다목적 환경정화기술 Using the Air Jet System for Oil CleanupUsing the Air Jet System for Oil Cleanup Make a confined space Build treatment fence Treat air jet, sequential operation with tide Collection Reference : Track Record I Chunri-Po Oil cleanup 2008

12. 친환경 다목적 환경정화기술 Floated oil residue Oil residueShellfish hole After 2 MonthsAfter 2 Months After 4 MonthsAfter 4 Months ShellfishTurban shellPurificationSeaflower Reference : Track Record I Chunri-Po Oil cleanup 2008

13. 친환경 다목적 환경정화기술 Songdo Sea water Canal, Incheon 2012. November26,000 m2 Depth 1 ~ 3 meter Artificial Moss and organic material contamination 애수교 폭포방향 ( 작업 전 ) 애수교 폭포방향 ( 작업 전 ) 애수교 하부 ( 작업 전 ) 애수교 하부 ( 작업 전 ) 점토 포집 ( 작업 중 ) 점토 포집 ( 작업 중 ) 애수교 폭포방향 ( 작업 후 ) 애수교 폭포방향 ( 작업 후 ) 애수교 아래 ( 작업 후 ) 애수교 아래 ( 작업 후 ) Ilsan Lake Park, Gyunggi-do 2011 04 ~ 09 2012 04 ~ 09 2013 04 ~ 09 300,000 m2 Depth 0.5 ~ 1.5 meter Artificial lake Bottom caution from the design Reference : Track Record II

14. 친환경 다목적 환경정화기술 Challenge, Responsibility, Reliability, and Contribution are our core Values to do our business, and promoting and improving Environmental techniques to protect our planet is the goal of the business. It’s our role to improve our society by doing standardization And distribution the technique to be used for clean planet. The end of Documents