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Dual-Track Thermal Welding & Air Channel Testing VS. Single-Track Wedge Welding & Air Lance Testing

Why 30mil PVC = 60mil HDPE
Links to State Min Tthickness Regs

Frequently Asked Questions
PVC Frequently Asked Questions  
UltraTech Frequently Asked Question

EPI Geomembrane Technical Information
PVC Geomembrane Material Specifications
25 Year Old 10 Mil PVC
30 Year Old 20 mil PVC MSU W.R. Kellogg Biological Research Station 
FREE EPI Spec.File Software
Friction Angle Testing Reports
Minimum Thickness
PVC Longevity
Sweet Cherry Processing
Stock Liner Sizes
Typical Installations
Unfolding PVC liners
Underwater PVC Placement 
EPI Solutions Documents  
Detail Drawings 
Measuring Ponds
Testing Information
Thermal Welding
Thermal Welding Temperatures
Welding New PVC to Existing PVC
Wolschon Accelerated Peel Testing
 

EPI  Quality Control Manual
Scope
In-Factory Quality Control
Shipping & Handling
Field Installation Procedures
Construction Quality Control
Safety Policy
References
Appendix A

02770 PVC Geomembrane - CSI Format
ASTM D 7176 PVC Specifications
 

Construction Details Page

Installation
Measuring Ponds
Unfolding Liners

Welding
Chemical Welding  
Adhesive Seaming  
Thermal Welding  
Welding New PVC to Existing PVC

Drawings
Anchor Trench Details  
Pipe Boot Details  
Vent Details  
Anchoring to Concrete Detail

The EPI Liner Letter Page

PGI Technical Bulletins Page

Quality Control and Assurance: It’s all in the Calendering
May 1986

Quantification of Leak Rates Through Holes in Landfill Liners
December 1986

PVC Geomembrane Case Study- 25 Years Later
November 1993

Demonstrating PVC Geomembrane Durability Landfill Closures
November 1993

Identification and Behavior of PVC Geomembrane Components
April 1994

Successful History of PVC Geomembranes Bureau of Reclamation: 1968 - 1995
March 1996

Comparison of PVC and HDPE Geomembranes
March 1997

Copper Heap Leaching – A Case for PVC Liners 
May 1997

Wedge Welding PVC Geomembranes
May 1998

Case Study of PVC Geomembrane Durability
July 1998

Specifications for Thermal Welding PVC Geomembranes
December 1998

Benefits of PVC Geomembranes For Landfill Covers
January 1999

Comparison of 30 mil PVC and 60 mil HDPE Geomembranes
March 1999

PVC Geomembrane Interface Strengths
December 1999

PVC Geomembrane / Geosynthetic Interface Strengths
April 2000

Solutions
Printer Friendly Pages
EPI Company Profile 
CD-ROM Installation Instructions  
Biography - Fred Rohe  
Biography - Mark Wolschon  

Materials
10 mil PVC Specification  
20 mil PVC Specification  
30 mil PVC Specification  
40 mil PVC Specification  
50 mil PVC Specification  
60 mil PVC Specification 

40 mil Potable Water PVC Spec
Cherry Brine pit liners

20 mil UltraTech Specification   
30 mil UltraTech Specification   
40 mil UltraTech Specification   
35 mil Reinforced UltraTech Spec   

36 mil Reinforced Polypropylene Spec 
45 mil Reinforced Polypropylene Spec

36 mil Coolguard HR Specification  
45 mil Coolguard HR Specification  

Quality Control - Testing
Factory Fabrication - Wolschon Testing  
Factory Fabrication - X-bar-R Charts  
Air Channel Testing PVC  
25 Year Old 10 mil PVC Still Performs  

Interface Friction Angle
Overview  
PVC - Sand  
PVC - Sandy Loam  
PVC - Clay  
PVC - Geotextile  

Applications
Sylvan Resort Case Study   
Antrim-Kalkaska Landfill Closure Case Study  
Coachella Canal Case Study  
UltraTech Secondary Containment  
UltraTech Storm Water Containment

Installation
Pond Measuring Instructions
PVC Panel Unfolding Instructions  
Pipe Boot Installation Instructions  
EPI Technical Service Representative 

PVC Welding
Chemical Welding Instructions
Clifton Adhesive Seaming Instructions
HH-66 Adhesive Seaming Instructions  
Welding New PVC to Existing PVC Instructions
Thermal Welding Index
Wedge Welding Strength
Wedge Welding Temperature


Links Page

PVC Technical Papers Page

Vinyl Information
PGI Minnesota DNR 30 Year PVC Testing
Vinyl Chemistry and Basic Compounding
What is PVC?
Calendering PVC
Calendering PVC - Sheet Integrity
Critical Properties of PVC Raw Materials
Mechanical Properties of PVC
Technology of Plasticizers
Polymeric Plasticizers
Plasticizer Retention
Evaluating Plasticizer Loss In PVC Geomembranes
Phthalate Plasticizers are Safe
PGI Presentation to Michigan DNR
OxyChem Position Paper to MI DNR
Bureau of Reclamation Experience with PVC Seams
EPA Evaluation of Geomembrane Seams
Household Hazardous Waste in Sanitary Landfills
PVC MSW Leachate Resistance
PVC Geomembranes in Solid Waste Landfills & Covers
Examination of a PVC Landfill Cap
Outdoor Exposure of PVC
Differential Settlement
PVC in Arch Dam Repair
5 Questions... ~ Functional PVC
PVC for Evaporation Ponds
Reduction of Destructive Tests for PVC Seams
Plasticizer Retention in PVC Geomembranes

Air Channel Testing
ASTM D 7177 PVC Air Channel Testing
Air Channel Burst Testing of Thermal Welds
Low Temperature Air Channel Testing of PVC
Thermally Bonded PVC Seams "State of the Art"
Reduction of Destructive Tests for PVC Seams
Air Channel Testing Landfill Geomembrane Seams

Friction Angle
Friction Angle Testing Reports
PVC Shear Strength Characteristics

EPI Published Papers Page

Eliminating costly tests for PVC geomembranes by using new ASTM D 7177 air channel test for field seams

Air Channel Test ASTM D 7177 Eliminates Water Balance Test of PVC Geomembrane Lined Surface Impoundment

Strength testing of thermal welded PVC geomembrane field seams using non-destructive air channel methods

Geomembrane Installation over Structural Foam
Fred P. Rohe
Canadian Environmental Protection magazine
March 2005 

Geomembrane Installation over Structural Foam Fill – General Motors Renaissance Center Plaza and Promenade 
Fred P. Rohe
Presented at the Peruvian International Geosynthetic Societies' "First National Congress on Geosynthetics" held October 27 - 29, 2004.

PVC Geomembrane Liner Placement Underwater in an Operating Irrigation Canal
Fred P. Rohe
Presented at the Peruvian International Geosynthetic Societies' "First National Congress on Geosynthetics" held October 27 - 29, 2004.

 UTILIZING PVC GEOMEMBRANES FOR LANDFILL AND POND LINERS
Fred P. Rohe
Presented at VinylTech '99, Toronto Canada

Geomembrane Liner Selection Using Performance Specifications
Fred P. Rohe
Geotechnical Fabrics Report, January 1991

Road to Morocco
Case study of Golf Course pond liner installation in Africa

Curing of Chemically Welded PVC Seams
F. Rohe & S. Lewis

Speedy Seam Testing
Plastics World Technology News

Containment Liners
Land & Water Magazine

Underwater PVC Geomembrane Placement
Geosynthetics '91 - Atlanta, GA