SEWAGE DEPARTMENT TRAINING PROGRAM
How to Build an Elevated Sandmound Sewage Disposal System
The amount of sand required will be found in the permit plans. In normal situations, it could be as little as 12 inches or as much as 28 inches. However, in cases where the elevated sandmound is being used to correct an existing sewage problem, it could be even greater.
The depth is measured at the point of highest elevation in the location where the absorption area (aggregate) will be sited. The sand pile will then be brought to level across the entire absorption area site. Therefore, while the sand may be 12 inches in one corner, it may be several feet deep in another.
End view of a sand pile on a slope. Note the depth of sand increases as the slope increases. The depth of the sand would be measured at the most upslope point.
