Draft Details

Designation:W200
Source:CSA
Review start date:Mar 27, 2018
Review end date:May 27, 2018
Contact email:sue.ruscetta(at)csagroup.org
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Draft Scope/Description:

Scope

1.1 General

This Standard provides requirements and recommendations for the design of Bioretention systems intended for the management of urban stormwater runoff.

1.2      Bioretention systems in scope

The types of Bioretention systems covered by this Standard include

a)    bioretention:

Bioretention with no underdrain; and Bioretention with underdrain;

b)    biofilters (impermeable liner); and

c)    bioretention planters and bioretention bump-outs (curb extensions)

1.3      Bioretention systems out of scope

The following sub-types of Bioretention systems are not covered by this Standard:

- bioswales;

- tree trenches or pits

- rain gardens

1.4      Requirements of Local Jurisdictions

This Standard provides minimum requirements and recommendations for the design of Bioretention systems.  In the application of this Standard it should be noted that local jurisdictions may have criteria or requirements over and above (beyond) what is provided in this Standard. The user of this Standard is responsible for determining any local requirements and these requirements shall take precedence over those provided for in this Standard.

1.5 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

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