This document is the 908D Arc 36 HC At Grade Installation Detail. A detail with dimensions and notes included.

The detail shows the native backfill or approved fill with dimensions. Width includes 2” of side wall distance.

Notes state to excavate trenches to proper depth. Smooth irregularities in the excavation to a level, flat surface. Assemble arc leaching chambers and universal endplates together in trenches. Install universal end cap and secure in place with backfill. Punch out pipe hole openings in the end plates and connect inlet pipes. Fill sidewall area to top chambers with native soil. “Walk in” fill to compact soil along sides of arc chamber to achieve load rating. Cover arc leaching chambers to a minimum of 12” of granular cover after consolidation for H-10 applications.