SEWAGE DEPARTMENT TRAINING PROGRAM
How to Build an Elevated Sandmound Sewage Disposal System
Next bucket and rake smooth aggregate to a depth of 6 inches across the entire sand surface.
Definition of aggregate:
Material meeting the requirements of the Department of Transportation specifications, Publication #408 (1994) section 703. The size and grading shall meet AASHTO No. 57 requirements and be of Type B quality. The material must be from a PennDOT certified stock pile.
Aggregate being bucketed unto the sand. Note the berm around the sand is higher to contain the aggregate,
