SEWAGE DEPARTMENT TRAINING PROGRAM
How to Build an Elevated Sandmound Sewage Disposal System
While bucketing the sand on site is the preferred method, larger systems may exceed the reach of the bucket. In such cases, it may be necessary drive on the site. This should only be done after first placing a minimum of 12 inches of sand on the scarified surface in while the machine will be driven.
When running equipment on the sand, be sure to have at least one foot of sand under the machine.
The use of a tracked machine is preferred over those that operate on wheels as it produces less and more even compaction.
In cases where a backhoe or excavator has driven over a portion of the sand pile, it should run over the entire pile to attempt uniformity in compression. In many cases, elevated sandmounds have failed because one end was compacted and the other was not. The non-compacted end then settled causing one end of the system to be lower with the result of all the effluent ponding in that section.
