Trenchless Technology for Sanitary and Storm Rehabilitation

1. Trenchless Technology for Sanitary and Storm Rehabilitation Presented by Jeff Beck, P.E. Insituform

2. Trenchless Technology • Cured in Place Pipe – Rehabilitating Sanitary and Storm Sewers • New CIPP innovations • AISC – Air Inversion Steam Cure • iPlus™ Composite • iPlus™ Infusion • Green Initiative using Trenchless

3. Global Infrastructure Crisis • 2009 Report Card for America’s Infrastructure – per ASCE • Wastewater = D – • Bridges = C • Investing in infrastructure, has proven to be beneficial in the past, with a $7 return for every $1 of investment • Trenchless (no-dig) technologies are more cost-effective and less disruptive pipeline solutions to other traditional methods • These technologies benefit the health of people and the economy

4. Global Water Crisis • The Clean Water Act was established 35 years ago to help prevent spills and environmental damage • The EPA estimates there are more than 40,000 sewer spills each year • Sinkholes are becoming a more common occurrence • Insituform’s flagship cured-in-place pipe technology helps to address these and other problems

5. Insituform History • Insituform was established in 1971 with the invention of the cured-in-place pipe method of underground pipeline rehabilitation • Developed by Eric Wood in the UK, the Insituform process was the first to rehabilitate underground pipelines without digging and disruption Insituform working in Denver, Colorado

6. What is CIPP? • Developed in 1971, cured-in-place pipe (CIPP) is a trenchless technology developed by Insituform • The end product is a jointless, seamless, pipe-within a pipe that protects against spills, breaks and pipeline leakage • Insituform has installed over 15,000 miles of CIPP and has been the industry leader for over 35 years

7. Benefits • Eliminate infiltration and exfiltration • Restore structural integrity • Prevent sinkholes and surface settlement • Eliminate joints, root intrusion and leaks • Increase flow capacity • Protect pipes from corrosion • Increase pipe strength • Reduce maintenance • Minimal traffic disruption • Fewer social costs to open-cut • Suitable for irregularly shaped pipes and changes in pipe diameter

8. CIPP Installation • Thermosetting resin is injected into a felt tube • The tube is inserted into an existing host pipeline by either pull-in or inversion • The tube is inflated to the size of the host pipe • The CIPP tube is cured using hot water or steam • Ends are cut and the final product is a fully-functional pipe-within-a-pipe

9. CIPP Installation

10. Why Trenchless? • Trenchless technology is superior to dig and replace for a variety of reasons • Cost-effectiveness • Ease of Design • Production rates • Extends underground assets • Benefits environment

11. Open Cut Pricing

12. Wet Out • Insituform has seven wet out facilities strategically located throughout North America • All facilities are ISO-certified and comply to industry safety standards • Quality is constantly regulated and makes use of the most advanced wet out technologies

13. Resin Epoxy Polyester Vinyl ester • Resin - Once cured, thermosetting resin retains its shape with no residual memory. • Resin types: • Polyester • Vinyl Ester • Epoxy • Polyester resins are most used in gravity sewer rehabilitation due to their high flexural modulus, low tensile elongation and good chemical resistance.

14. Design and Testing • ASTM F1216 • ASTM F1743 • 100 Year Design Life • Third Party Testing • Test Results From Previous Installations

15. CIPP Technical Envelope

16. Air Inversion Steam Cure (AISC) • Produces same high quality end product in shortened installation cycle • Specialized installation equipment to minimize footprint at manhole • Insituform material modified for steam cure • Available for a variety of diameter pipe (8” – 72”) • Over 2 million feet installed using steam to date

17. Air-Inversion Steam-Cure (AISC) • High energy steam cure shortens installation cycle • Off street installation made with little disruption • Steam eliminates grade limitations • Minimal water required for cure

18. 30” Sewer – St. Louis MSD AISC Before Lining Post-Lining

19. Innovative Technology Insituform has developed new CIPP solutions for trenchless construction iPlus Composite™ Reinforced with carbon and glass fibers, iPlus Composite cost-effectively provides environmental benefits, increases flow rate, minimizes disruption and won Innovative New Product Award at No-Dig in 2007. iPlus Infusion™ iPlus Infusion is Insituform’s cured-in-place pull-in and steam-cure method. It offers superior physical properties, minimal disruption, and environmental benefits for small diameter pipes. iPlus Composite™ and iPlus Infusion™

20. iPlus Composite™ iPlus Composite™ is suitable for the rehabilitation of medium to large diameter pipelines Reinforced with carbon or glass fibers, it provides more strength and greater capacity Thinner walls = less resin = better for the environment

21. iPlus Composite™ CP installed into PVC host pipe Close-up Tight Fitting

22. iPlus Composite™ sewn-seam coating (PP) Glass Carbon PVC

23. iPlus Composite™ • Sandwich technology • High modulus (stiff) outer “skins” bonded to a core with lower material properties

24. Completed iPlus Composite 30-inch iplus Composite™ installation at a service location

25. iPlus Infusion™ - ASTM 1743 Small installation footprint minimizes disruption Ideal for small backyard easements 700+ ft installations Boiler truck can be located 250 ft from MH

26. iPlus Infusion™ Shorter cycle time Smaller footprint Shorter sewer outage Reduced equipment on street Minimal traffic disruption Greater installation flexibility

27. iPlus Infusion™ Installation • Step One: Tubes “wet-out” using controlled resin impregnation system • Step Two: A resin-saturated tube is pulled into damaged pipe

28. iPlus Infusion™ Installation • Step Three: Air is used to inflate the tube and steam is used to cure the resin • Step Four: Service laterals are restored internally

29. Steam Cure • 50% reduction in energy usage and 98% reduction in water usage over traditional water inversion/hot water cure • Virtually eliminates discharge of process water into sewers • No grade limitations • Shorter cool down allows lateral reinstatement to take place sooner

30. Reduced Equipment Requirements • Smallest jobsite footprint of any CIPP process • Portable equipment • Ideal for off-road installations • Minimal traffic disruption • Reduces stress on tube • Shot lengths up to 230m • Meets or exceeds the physical properties set forth in ASTM F1743

31. Technical Envelope Infusion™

32. Environmental Benefits • Insituform uses air and steam energy where applicable • Cuts down water use by 95% • Tube can be made from up to 98% recycled material • iPlus Composite and other technologies cut down on need for resin and other petroleum-based products • CIPP rehabilitation can prevent sewer spills, oil spills and water main breaks

33. Questions?