Contaminated Soil Volume calculation
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This document summarizes the process for excavating and transporting heavily oil contaminated soil from Kuwait to a landfill. It involves several steps: delineating contaminated areas using satellite imagery and field verification; conducting surveys to identify underground utilities and unexploded ordnances; taking soil samples for analysis; establishing boundaries and depth of contamination; calculating soil volumes using software to create elevation grids; excavating and loading the soil; transporting by truck with weight and barcode screening; and disposing of the soil at the landfill. The contaminated soil volume is calculated using the trapezoidal rule based on upper and lower elevation grids clipped to the excavation boundaries.
Contaminated Soil Volume calculation
- 1. EXCAVATION & TRANSPORTATION OF HEAVILY OIL CONTAMINATED SOIL TO LANDFILL IN NORTH KUWAIT AREA Alghanim International Fouad Alghanim & Sons Group Of Companies Salah Bakry Lead GIS Specialist Project Activities Summery and Contaminated Soil Volume Calculation Methods
- 2. Excavation and Transportation of Heavily Oil Contaminated Soil to Landfill in North Kuwait Area Overall Project Process Chart UXO BAC Temporary Facility & Gatch roads Anomaly Avoidance (FEIA, SSC, GT, TS) Mechanical Excavation, Sifting & Screening (CSP) UXO Geophysical Survey (DOL, WOL, New Asphalt Rd, Tarcrete, Access Gatch Rd, Coastal Trench-Remediation areas) Landmine Clearance (Mechanical Demining) (Coastal Trench – Minefield Access Areas Coastal Oil Deposits) Ground Proofing (Mechanical Technical Survey) (Coastal Trench – Trench line & Oil Spill Work areas) Delineation of present boundary of contaminated areas Site Ground-Truthing Satellite Image analysis & Field Verification Manual Slit Trenching (1.0 m W * 1.5 m D) Above & Underground utilities GroundTruthing/Pre -condition Survey Total area of contaminated feature Depth of contaminated soil Volume of Contaminated Soil UXO Removal of Scrap (From area to be excavated) Excavation & Transportation Disposal of Scrap (Collect & dispose) Trial Pit Excavation (1m w * 1.5m L * 2.5m D) (Understand the contamination profile in the field) Field Density Testing Density of soil for different features (Kg/m3 ) Excavation & Loading (Excavate the contaminated soil) (To mixing area – WOL, WHP) (To Landfill area) Transportation Weighbridge / Barcode Screening Weighbridge / Barcode Screening Compaction & Testing (90-95% of the maximum density of the modified proctor) Compliance Monitoring (TPH < 5000 mg/Kg Restoration / Backfilling Weight of Soil (Ton) Volume of Soil (m3 ) Features Oil Lakes (Dry & Wet) Contaminated Soil Piles Tarcrete Coastal trench Coastal Oil Deposits Wellhead Pits FEIA QRA PHSER # 3 PHSER # 4 PHSER # 5 HSE Studies Topographic Survey Topo survey Ground Elevation, Road/Pipe crossings, existing utilities/facilities, vegetation Pre-Site Soil Characterisation Sample collection & Analysis Sample collection, analysis & soil logging & analysis – Profile of contamination, Thickness of contamination layers, and depth of contamination Field Density Testing
- 3. Estimate soil volume before excavation - Prepare Data to use it for volume Estimation Excavation Zones Boundary Topographic Surface Level Contaminated Soil Depth
- 4. Excavation Zones Boundary Topographic Surface Level Contaminated Soil Depth Software - ArcGIS 10.1 Submission - Report - Shapefile for Excavation zones attached with report Software - AutoCAD & Surfer Submission - Report - Drawings for NGL & Contour - Drawing for Utilities Software : - Surfer & ArcGIS Submission: - Report - Shapefile for sampling Locations - Surfer Grids for Uber surface and lower Surface - The final inputs for volume calculation : L1 L2 L3
- 5. Volume Calculation for Dry Lake ,example Zone 3 Area 1D Methods 1 Using Upper and Lower Grids 1. Step 1 : • To clip sampling data inside or close to excavation zone boundary Sampling points and CIC Sampling points using ArcGIS
- 6. - Step 2 : • To open zone3 Shapefile in Surfer ( to get fixed extent coordinates ) -Map -New -Base Map
- 7. - Step3: • Save shapefile zone as BLN file in surfer to use it to Blanked (Clip) other grids. - File -Export -BLN File
- 8. - Step4: • Create Upper surface Grid for Elevation from Topographic Survey Level Spot points - Grid - Data - Open NGL Excel file - Select X,Y,Z - Gridding Method Kriging - Fix Grid line Geometry for Zone3 Extent - Spacing 1X1 m
- 9. - Step4: • Output grid for Upper surface
- 10. - Step5: • Blanked ( clip ) Upper Surface Grid using Zone 3 BLN file - Grid - Blank - Select grid to blank - Select BLN
- 11. - Step5: • Output Upper Grid Blanked
- 12. - Step6: • Create Grid from Lower Surface from: Upper Surface Elevation – Contamination Depth = Lower Surface Elevation - Grid - Excel Cutoff Data - Select Zone3 -Use X,Y, Contamination Level - Use Same geometry and spacing that used for Upper surface
- 13. - Step7: • planked ( clip ) Lower Grid using Zone 3 BLN file - Grid - Blank - Select grid to blank - Select BLN
- 14. - Step7: • Output Lower Grid Blanked
- 15. - Step8: • Estimated Volume : - Grid - volume - Select Upper Surface - Select Lower Surface
- 16. - Step8: • Output Volume report • Volume (Trapezoidal Rule) = 39854.94 m³
- 17. • Step1: Same methods • Step2: Same methods • Step3: Same methods • Step 4: to create only 1 Grid from (cutoff value selected by environmental Team from Sampling log) Volume Calculation for Dry Lake ,example Zone 3 Area 1D Methods 2 Using one grid created from Cutoff Value
- 18. Step 4: Output Grid Excavation Depth As total Contamination value , not Elevation value
- 19. - Step5: • Calculate Volume : 38357 - Grid - Volume - Select upper surface from Cutoff Grid - Constant value is 0
- 20. - Grid - Volume - Step8: • Output Volume report • Volume (Trapezoidal Rule) = 38357.75 m³
- 21. Volume calculation for Contaminated Piles • Export Topographic Survey data for Piles in excel file X,Y,Z • Create surfer grid for each pile grid 5X5 or 1X1 m related to piles boundary • Create contour in surfer 0.1 m interval • Show piles grid in 3D with contour • Select contour line for base of pile • Calculate volume from grid ( consider pile grid as Upper Surface and base contour as constant Z value
- 22. • Pile Contour and 3D - Base contour is 36.5 - So - Grid - Volume - Piles grid is Upper surface - Constant Z = 36.5