RELINING VINYL LINED AC WATER MAINS TO PREVENT PCE LEACHING - SANDWICH, MA 2003 AWWA ANNUAL CONFERENCE AND EXPOSITION

摘要

Over 1,000 miles of vinyl lined asbestos cement (AC) pipe were installed primarily in the northeast United States between 1968 and 1980. In early 1980, it was discovered that the vinyl lining was leaching tetrachloroethylene (PCE), a reported carcinogen, into the water distribution system. Although initial investigations indicated that it would ultimately disappear, this PCE problem is still prevalent in several communities throughout the northeast. In 2001, Metcalf & Eddy and the Sandwich Water District conducted a lining trial, which determined that relining factory produced vinyl lined AC water mains with rapid-setting polymeric lining material could prevent PCE from entering the water supply. The detailed results of this trial were published in the June 2002, Journal of the New England Water Works Association. This paper will expand on the lining trial to include the planning, design, and construction of the 8,500 linear foot vinyl