CONSTRUCTION OF A SANITARY LANDFILL - ISWA 2015iswa2015.org/assets/files/downloads/Construction_of_a_Sanitary... · CONSTRUCTION OF A SANITARY LANDFILL Landfill Training Workshop

ISWA Main Sponsors:

CONSTRUCTION OF A SANITARY LANDFILL

Landfill Training Workshop 7th September 2015

PRESENTATION*OUTLINE*

! CONSTRUCTION)OF)KEY)COMPONENTS)OF)A)SANITARY)LANDFILL)

! CONSTRUCTION)QUALITY)CONTROL)AND)QUALITY)ASSURANCE)(CQC/CQA))PLAN)

! EXAMPLES)OF)BOTTOM)LINER)SYSTEM)CONSTRUCTION)9)SOIL)&)GEOSYNTHETIC)MATERIAL)INSTALLING,)TESTING)&)IMPLEMENTING)CQC/CQA)PLAN)

KEY*COMPONENTS**(Soil*&*Geosynthe=cs)*

!  Typical*boCom*liner*system**F*Single*Composite*

•  Soil)Liner)•  HDPE)Geomembrane)•  Geocomposite)Drainage)Net)•  ProtecLve)Soil)Cover)or)

Aggregate)Layer)

!  Alternate*BoCom*Liner*System**F*Double*Composite*

)•  ) Soil)Liner)•  HDPE)Geomembrane)(S))•  Geocomposite)Drainage)Net)•  GeosyntheLc)Clay)Liner)•  HDPE)Geomembrane)(P))•  Geocomposite)Drainage)Net)•  ProtecLve)Soil)Cover)or)Aggregate)

Layer)

CQC/CQA*PLAN*•  Construction Quality Control/Assurance Plan

•  Required by regulations •  Controls and measures to meeting requirements

•  Definitions included in a typical CQC/CQA Plan •  Quality •  Construction Quality Control •  Construction Quality Assurance •  Manufacturing Quality Control •  Manufacturing Quality Assurance

•  Construction Management •  Construction Engineering

CQC/CQA*PLAN*

! Quality = Conformance to Requirements (Philip B. Crosby, Quality is Free, 1979) •  Requirements = Plans, Specifications, Contract •  In construction, Quality is measurable, quantitative

o Not about “goodness” or other qualitative terms " 94.9% compaction is not 95% compaction (min.) " 1.1x10-7 cm/sec is not 1x10-7 cm/sec (max.)

o Quantitative examples: " Depth, area, length, width " Percent compaction, moisture content, permeability " Elevations and grades " Etc…

COMMON TERMS (often misunderstood)*

! Construction Quality Control (CQC) •  A planned system of inspections used to directly

monitor and control the quality of a construction project (EPA, 1986).

•  Inspections, audits, tests and observations ! Construction Quality Assurance (CQA)

•  A planned system of activities that provides the owner and permitting agency assurance that the facility was constructed as specified in the design (EPA, 1986).

•  Inspections, audits, tests and observations

CONSTRUCTION QC & QA*

Construction Quality Control •  Planned System of Inspections •  Performed by Contractor

" Oversight by CQA Firm •  Directly Monitor and Control

Quality "  In “real time” to affect

changes •  Assess Compliance with Plans and

Specifications "  Information provided to

Contractor and Owner "  Information suitable for

certification)

Construction Quality Assurance •  Planning system of inspections •  Third Party Firm

"  Consultant or testing firm "  Independent of Contractor,

Owner " Works for Owner (not

contractor) •  Assess Compliance with Plans and

Specifications "  Formal, Written Documentation

•  Professional certification

COMMON TERMS (often misunderstood)*

! Construction Engineering (CE) •  Bidding and negotiation assistance •  Contractor selection •  General support and guidance •  Plans and specifications

! Construction Management (CM) •  Organizing and directing men, materials and equipment to

accomplish the purpose of the designer (W. Gary Westernoff)

•  Not same as CQA, CQC, CE " Supervising, managing construction forces " Means and methods " Direct and Active Role " Expends Construction Fund and Resources " Controls Time and Cost

MANUFACTURING QUALITY CONTROL (MQC)*

•  Planned System of Inspections •  Directly Monitor/Control Material

Manufacturer •  Performed by Manufacturer

•  geosynthetics, piping, pumps, etc.

• Compliance with Material Requirements

MANUFACTURING QUALITY ASSURANCE (MQA)*

! Planned System of Activities ! Inspections, Verifications, Audits by MQA

Firm •  Independent consultant visits plant or tests

materials •  “conformance tests”

! Assess Compliance with Plans and Specifications

EXAMPLES*BOTTOM*LINER*SYSTEM*CONSTRUCTION*

Cell 8 Battle Creek Landfill, Page Co, VA

Clay Liner Construction

Soil liner moisture conditioning

Compaction (Low Permeability Soil Liner) – Prince William Co., VA

Field Density testing for Soil Liner

Undisturbed soil sampling for permeability testing

Surveying base grade

60 mil textured HDPE Rolls delivered to site

Mfgr. Roll and batch identification #

Cecil County, MD Liner Deployment

Deploying HDPE Liner at Battle Creek Landfill, Page Co, VA

HDPE Deployment over Anchor Trench

Cell 8 Battle Creek Landfill, Page County, VA

Deployed HDPE at Battle Creek Landfill, Page Co, VA

HDPE Double Track Fusion Welder (“mouse”)

Vacuum Box Weld Testing

Extrusion Weld Repairs

Pressure Testing Results

Liner Panel Numbering

HDPE Liner Panel As-built

GCL Deployment at Prince William County

(to be covered with HDPE)

Geotextile Installation

Leachate Flow Direction

Perforated Leachate Collection Pipe

Protective cover aggregate (leachate collection)

Installing HDPE Sideslope Risers

Leak Detection Surveys

Other LF Features to be Constructed

Roads and Ditches Leachate Management

Stormwater Retention Ponds LFG Collection and Control

THANK*YOU*

Luis)Marinheiro)lmarinheiro@gmail.com)+(351))919)562)937)

)James)Law,)P.E.,)IWM)jlaw@scsengineers.com)

+1)(919))60496102)