Will my wastewater (sewage) treatment plant be surrounded by concrete?

Will my wastewater (sewage) treatment plant be surrounded by concrete?

If installing a package wastewater (sewage) treatment plant in an excavation that allows water to enter (a high water table), this installation must be backfilled using a dry lean concrete mix or alternatively pea shingle if not a high water table.  For more information please refer to the installation manual or contact us.