This document is the 509 Water Quality Unit WQU 20ft 60in Detail. It shows details for the unit with dimensions chart.

The plan view unit detail shows the HDPE bypass pipe, nyloplast basin, soil tight/water tight coupler, flow direction, inlet and outlet sides.

The profile view unit detail shows the dimensions, HDPE access risers, beginning bypass invert, bypass pipe located on side of pipe and outlet orifice.

The inlet structure nyloplast basin detail shows the 90 degree bend to WQU and to bypass location.

The outlet structure nyloplast basin detail shows the 90 degree bend to WQU, match inverts and from bypass location.

The inlet structure fabricated sump TEE detail shows the 90 degree bend to WQU, 18” inspection riser and to bypass location.

The outlet structure fabricated reducing WYE details shows from WQU and match inverts.

Structure options state that fitting dimensions vary with unit design, combinations of nyloplast basins and fabricated fittings are available and structures by others may be used.

A chart is provided with model numbers, main pipe diameters, treated flow rate, sieve size, particle size, inlet, outlet, outlet orifice and elevation change values.

Notes state to see standard details for storm water quality unit product details. Reference technical note 1.03 for additional design information and elevation change denotes the elevation drop from invert of bypass at inlet to invert of bypass at outlet.