Volume 2-05, Chapter 3 - City of Wichita

Section 3.3.1 - Proprietary Treatment Systems
• The study must be conducted in the field, as opposed to laboratory testing;
• Field monitoring must be conducted using standard protocols which require proportional
sampling both upstream and downstream of the device;
• Concentrations reported in the study must be flow-weighted; and,
• The propriety system or device must have been in place for at least one year at the time of
monitoring.
Although local data is preferred, data from other regions can be accepted as long as the
design accounts for the local conditions.
3.3.1.3 Other Requirements
• The local jurisdiction may require that the facility be placed in a reserve and/or
establishment of a drainage easement the facility, which is accessible from a public road
or other accessible easement. When required, the drainage easement should be at least
20 feet wide, provide a minimum traversable width of 15 feet, have a maximum slope of no
more than 10%, and be appropriately stabilized to withstand maintenance equipment and
vehicles.
3.3.1.4 Inspection and Maintenance Requirements
Regular inspection and maintenance is critical to the effective operation of stormwater
management facilities. An operation and maintenance plan is required and shall include:
1. “Covenants for Permanent Maintenance of Stormwater Management Facilities” (also
called the “Maintenance Covenants”). An example covenants document can be found in
Volume 3.
2. “Inspection Checklist and Maintenance Guidance” for each type of stormwater facility that
is located on the property. Detailed inspection and maintenance guidance must be
prepared by the manufacturer or design engineer.
3. As-built drawings must accurately show the location of the facility, and clearly identify
reserves and access easements.
All stormwater management facilities must be maintained in accordance with the O&M Plan.
Volume 2, Technical Guidance Page 3 - 149