Crumpler Plastic Pipe, Inc.
...soil perc rates can be complex to discern and even unknowable. To speed up a soil’s perc rate in a stiff or complex soil, rock or sand is often placed around the perforated underdrain pipe. This technique is also used in house basement perimeter subsurface drains. A filter between the rock and the native site soil will prevent the native... See #2.
Differential Settlement
...and (iii) reduce the volume and rate of gas discharged to the atmosphere through the final cover system. Below the composite barrier was a geocomposite layer that served as an underdrain layer for the collection and removal of leachate expelled from the sludge due to consolidation caused by placement of the final cover system and by self-weight. See #3.
Customer Response Center: products, troubleshooting and plant assistance
...technicians will visit your plant and perform a complete physical inspection of the traveling bridge filter system. You’ll receive a report that includes ratings on the underdrain, media and porous plates, bridge mechanisms, drive shaft and bearings, backwash shoe and wear strips and drive motor and gear box. You’ll also receive... See #4.
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