Chapter 12A LAND PRESERVATION
Section 12A-90 Stormwater management performance standards.
The following general performance standards shall be followed in the preparation
stormwater management plans:
(1) BMPs shall be used to control the peak flow rates of stormwater discharge
specified design storms and to reduce the generation of stormwater runoff. These practices must
use pervious areas to treat stormwater and to infiltrate stormwater runoff from driveways,
sidewalks, roof tops and parking lots to the maximum extent practicable in order to improve
water quality and reduce the quantity of stormwater runoff.
(2) Annual groundwater recharge rates shall be maintained to the maximum extent
by promoting infiltration by the use of structural and nonstructural methods. Annual recharge
from the post-development sites should mimic the annual recharge from pre-development site
(3) Structural stormwater facilities shall remove eighty percent (80%) of the
annual post-development total suspended solids load. It is presumed that facilities comply with
performance standard if they are:
a. Sized to capture the prescribed water quality volume;
b. Designed in accordance with the specific requirements and level of service
criteria set out in
the Stormwater Management and Water Quality Manual; and
c. Constructed properly and maintained regularly.
(Ord. No. 13019, § 1, 7-1-91; Ord. No. 19442, § 2, 3-5-07)
(Ord. 19442, Repealed and Replaced, 03/05/2007, Prior Text)