Zerowastepacific geologicassociates

Construction Quality Assurance: Closing an Island Dump

Quality Assurance  A systematic program designed to provide verification that quality control functions have been adequately performed and to verify that the total installation conforms to the plans and specifications.

Usually performed by the Owner or Third Party Firm.

Quality Control  Testing and inspection functions performed to verify that specific parameters conform to the plans and specifications. Usually performed by the manufacturer or the installer.

Quality Assurance Team  Owner  Design Engineer  Construction Manager  CQA Monitor  Contractor

CQA Program  Pre-construction  Construction  Post-construction

Pre-Construction CQA  Meetings  Conformance testing  Shipping

Meetings  Pre-bid  Pre-construction  Progress  Final walkthrough

Conformance Testing  Process of testing and analysis of materials prior to deployment to ensure that the physical properties of the material are in accordance with the specifications.

Types of Conformance Testing  Manufacturing plant  Manufacturer’s plant audit  Third party laboratory

Manufacturing Plant Quality Control  Raw material  Geomembrane rolls  Post-production handing and testing

Raw Material  Resin manufacturer’s documentation  Sampling from the rail car  Resin testing  Storage

Polyethylene Resin (white) Compounded Resin (black)

Rail Cars Unloading Resin

Resin Properties  Density  Melt index  Carbon black  Oxidative induction time

Carbon Black Dispersion Test

Carbon Black Dispersion Chart

Geomembrane Extrusion  Blown film  Flat die

Post-Production Handling and Testing  Thickness  Labeling  Storage  Laboratory conformance testing

Micrometer for Thickness Testing

Storage of Geomembrane Rolls

Geomembrane Labels  Roll number and date  Resin manufacturer  Roll width and length  Thickness  Blend number

Laboratory Testing and Labeling for Geomembrane Rolls

Laboratory Testing  Frequency  Retains  Testing

Physical Properties  Tensile  Specific gravity  Puncture  Carbon black

Start of Tensile Test

Completion of Tensile Test

Manufacturer’s Plant Audit  Third party audit  Evaluation of quality control procedures

Plant Audit for Ordot Dump Closure

Inspection of a Plant  Review of manufacturer’s quality control program  Delivery, storage, and handling of resin  Production of geomembrane  Storage and labeling of the geomembrane

Third Party Laboratory Testing  Delivery  Sampling  Testing

Indicator Parameters  Density  Tensile properties  Asperity height  Carbon black  Puncture

Delivery of Geomembrane to the Site  Manufacturer’s certification  Off-loading  Logging of rolls by CQA Monitor  Cross checking conformance testing rolls

Pre-Construction Complete  Manufacturer’s testing and documentation complete  Third party conformance testing complete  Quality assurance engineer’s review complete

Construction CQA  Subgrade preparation  Geomembrane deployment and field seaming  Nondestructive testing  Destructive testing  Repairs

Subgrade Preparation  Written acceptance from installer  Compaction  Particle size  Desiccation

Subgrade Preparation

Geomembrane Deployment  Subgrade preparation accepted  Approved panel layout  Panel and seam identification  Weather conditions

Geomembrane Deployment

Field Seaming  Trial weld  Fusion welding  Extrusion welding

Trial Welds  Every four hours  Three feet in length  Welding

Trial Weld Preparation

Trial Weld Testing

Fusion Welding  Heat and pressure  Single wedge  Double wedge

Fusion Welding

Double Wedge Welder

Extrusion Welding  Heat bond  Oxidation removal  Welding

Oxidation Removal

Extrusion Weld

Nondestructive Seam Testing  Vacuum box  Air pressure  Spark test

Vacuum Box

Air Pressure Testing

Destructive Seam Testing  Frequency/selection  Shear testing  Peel testing

Destructive Seam Sample

Destructive Coupon Cutting

Destructive Shear Test Using Tensiometer

Repairs  Seams  Sheet

Documentation  Daily records  Observation and test data sheets  Progress reports  Construction deficiency reports  Final certification reports

Ordot Dump Closure  Existing conditions  Final grading  Cover system

Ordot Dump Existing Conditions

Ordot Dump Final Grading

Ordot Dump Cover System  Lower geocomposite  LLDPE geomembrane  Upper geocomposite  Geocell  Landfill gas extraction system  Leachate collection system

Cover System Detail

Cover System Installation

Geocell Installation

Drilling of Landfill Gas Extraction Well

Installation of Landfill Gas Extraction Well

Landfill Gas Flare

Leachate Collection Trench Construction

Stormwater Collection With Concrete Filled Geocell

Stormwater Collection Structures

Site Specific CQA Issues for the Ordot Dump Closure  Weather  Leachate seeps  Remote location  Waste relocation  Stormwater control

Current Closure Construction Progress  Photographs

Severe Weather Conditions

Initial North Slope Conditions

Grading and Relocation of Waste on North Slope

Grading of Waste on North Slope

Placement and Compaction of Waste on the Top Deck

Placement of Foundation Layer Over Final Waste Grades

Compaction of Foundation Layer Over Final Waste Grades

Installation of Leachate Seep Drain

Excavation of Temporary Leachate Storage Pond

Final Grading of Temporary Leachate Storage Pond

Installation of Bottom Geomembrane in Temporary Leachate Storage Pond

Installation of Floating Cover in Temporary Leachate Storage Pond

Construction of Leachate Storage Tank Pad

Excavation and Relocation of Waste Outside of the Final Cover (WRA 2)

Placement and Compaction of Clean Soil in Waste Relocation Area 2

Waste Relocation Area 1 Waste Removal and Backfilling With Clean Soil

Removal of Waste in Waste Relocation Area 4

Overview of Waste Relocation Area 4

Identification of Miscellaneous Waste for Removal

Access Road Construction

Excavation of Water Diversion Trench

Abandonment of Existing Landfill Gas and Groundwater Monitoring Wells

Delivery of Geomembrane Rolls

Logging in Geomembrane Rolls

Questions?