This month we continue to address some issues we have seen with installation of mound systems, causing some installers to question whether these systems are truly effective in dealing with problem soil conditions.
After proper surface preparation and treatment of the natural soil (described in last month’s column), the next area where we see many mistakes made is in the selection of the sand used to distribute septic tank effluent over the soil infiltrative surface.
Over the years, the definition of “clean, washed sand” has been clarified, as experts recognized that many mistakes were being made in the sand selection. Additional research
Keep It Clean
When installing mound systems, one of the most essential ingredients is the proper grade of washed sand
Jun 05, 2012
| by Jim Anderson, Ph.D., and David Gustafson, P.E. |
