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. (a) One or more public agencies may develop a stormwater
resource plan pursuant to this part.
(b) A stormwater resource plan shall:
(1) Be developed on a watershed basis.
(2) Identify and prioritize stormwater and dry weather runoff
capture projects for implementation in a quantitative manner, using a
metrics-based and integrated evaluation and analysis of multiple
benefits to maximize water supply, water quality, flood management,
environmental, and other community benefits within the watershed.
(3) Provide for multiple benefit project design to maximize water
supply, water quality, and environmental and other community
benefits.
(4) Provide for community participation in plan development and
implementation.
(5) Be consistent with, and assist in, compliance with total
maximum daily load (TMDL) implementation plans and applicable
national pollutant discharge elimination system (NPDES) permits.
(6) Be consistent with all applicable waste discharge permits.
(7) Upon development, be submitted to any applicable integrated
regional water management group. Upon receipt, the integrated
regional water management group shall incorporate the stormwater
resource plan into its integrated regional water management plan.
(8) Prioritize the use of lands or easements in public ownership
for stormwater and dry weather runoff projects.
(c) The proposed or adopted plan shall meet the standards outlined
in this section. The plan need not be referred to as a "stormwater
resource plan." Existing planning documents may be utilized as a
functionally equivalent plan, including, but not limited to,
watershed management plans, integrated resource plans, urban water
management plans, or similar plans. If a planning document does not
meet the standards of this section, a collection of local and
regional plans may constitute a functional equivalent, if the plans
collectively meet all of the requirements of this part.
(d) An entity developing a stormwater resource plan shall identify
in the plan all of the following:
(1) Opportunities to augment local water supply through
groundwater recharge or storage for beneficial use of stormwater and
dry weather runoff.
(2) Opportunities for source control for both pollution and
stormwater and dry weather runoff volume, onsite and local
infiltration, and use of stormwater and dry weather runoff.
(3) Projects to reestablish natural water drainage treatment and
infiltration systems, or mimic natural system functions to the
maximum extent feasible.
(4) Opportunities to develop, restore, or enhance habitat and open
space through stormwater and dry weather runoff management,
including wetlands, riverside habitats, parkways, and parks.
(5) Opportunities to use existing publicly owned lands and
easements, including, but not limited to, parks, public open space,
community gardens, farm and agricultural preserves, schoolsites, and
government office buildings and complexes, to capture, clean, store,
and use stormwater and dry weather runoff either onsite or offsite.
(6) Design criteria and best management practices to prevent
stormwater and dry weather runoff pollution and increase effective
stormwater and dry weather runoff management for new and upgraded
infrastructure and residential, commercial, industrial, and public
development. These design criteria and best management practices
shall accomplish all of the following:
(A) Reduce effective impermeability within a watershed by creating
permeable surfaces and directing stormwater and dry weather runoff
to permeable surfaces, retention basins, cisterns, and other storage
for beneficial use.
(B) Increase water storage for beneficial use through a variety of
onsite storage techniques.
(C) Increase groundwater supplies through infiltration, where
appropriate and feasible.
(D) Support low-impact development for new and upgraded
infrastructure and development using low-impact techniques.
(7) Activities that generate or contribute to the pollution of
stormwater or dry weather runoff, or that impair the effective
beneficial use of stormwater or dry weather runoff.
(8) Projects and programs to ensure the effective implementation
of the stormwater resource plan pursuant to this part and achieve
multiple benefits. These projects and programs shall include the
development of appropriate decision support tools and the data
necessary to use the decision support tools.
(9) Ordinances or other mechanisms necessary to ensure the
effective implementation of the stormwater resource plan pursuant to
this part.
(e) A stormwater resource plan shall use measurable factors to
identify, quantify, and prioritize potential stormwater and dry
weather runoff capture projects.