Date Added:5/8/2008 Title: Better Than Mobile Written by: Russell Pickett Date Written:5/1/2008 Abstract: The May 2008 issue of Municipal Sewer & Water looks at dewatering operations in the city of Lebanon, Tennessee. The article appears on pages 50 and 51 of the online reader and focuses on how the city's sewer department needed a way to more quickly dewater sludge. The new passive system uses three 60 x 100 ft geosynthetic tubes. Continued... Publication: Municipal Sewer and Water - May 2008 GSA Abstract ID: 2994

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Date Added:5/6/2008 Title: Slope Erosion Testing – Identifying “Critical” Parameters Written by: C. Joel Sprague Date Written:2/1/2008 Abstract: Various large-scale tests have been used to evaluate the performance of erosion control products. These tests typically are performed using boundary conditions that attempt to simulate field conditions. When evaluating slope erosion, for instance, a full-scale slope is generally eroded by rainfall impact and associated sheet runoff forces resulting from a simulated rainfall event. A certain combination of steepness, width and length of slope is selected, and the soil type, thickness, and compaction characteristics are chosen. The amount of soil loss from a protected condition is compared to that of the unprotected, or control, in order to establish product performance. In one such procedure, 6-inch thick compacted soil plots placed on a free draining tilt-table platform measuring 6 ft x 30 ft are used. Other tilting bed facilities use shorter and narrower plots, and different synthetic rainfalls. Still other facilities do the testing in-situ, out-of-doors, with even different dimensions, rainfall conditions, and soil type, preparation, and subgrade drainage. With this variety of approaches to testing, it is important to understand what mechanisms may or may not develop under modeled conditions and whether the associated mechanism depends on the type of erosion control product being tested and/or how it is installed. Specifically, some products armor the slope, encouraging efficient overland runoff, while other products encourage infiltration by absorbing the rainfall. Still other products seek to balance the two approaches to erosion control. Excess runoff may overwhelm surface “armoring”, while high infiltration rates may lead to slope instability, especially for steeper slopes. This paper uses the Revised Universal Soil Loss Equation (RUSLE) to consider the various parameters associated with large-scale slope evaluations and identifies the “critical” parameters associated with slope stability. Practical test results are also presented to support the analytical findings and demonstrate that the ASTM 6459 protocol reasonably agrees with theoretical RUSLE-based calculations. It is not clear if other (tilting bed) protocols similarly correlate. Publication: EC08 Conference Proceedings - Feb 2008 Published by: IECA Purchase link: http://www.ieca.org GSA Abstract ID: 2993

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Date Added:4/17/2008 Title: Covering Their Tracks Written by: Lynn Merrill Date Written:3/1/2008 Abstract: Lynn Merrill, writing for Waste Age, reviews a number of interesting alternative daily covers (ADCs) in the landfill business. One of the more interesting notes, however, comes from a Maryland site at which two landfill cells were constructed simultaneously in order to make construction more economical. Polyethylene covers from Raven are being used to protect the cell liners and leachate collection system while the cells are not in active use. Continued... Publication: Waste Age - March 2008  Pages: 34 to Published by: Penton Media GSA Abstract ID: 2904

Contact Information: Waste Age Bill Wolpin P.O. Box 12997 Overland Park, KS 66282 USA Phone:+1-770-618-0112 Email: bill_wolpin@primediabusiness.com Website:http://www.wasteage.com