Laserfiche WebLink
• <br />8. STORMWATER MANAGEMENT. The following requirements apply to <br />subdivision, grading or the creation of impervious surface subject to this Rule. <br />(a) The requirements of District Rule C apply except for paragraphs 2(a) <br />through 2(c) and 5(b) through 5(f) of that Rule. <br />(b) Better Site Design principles will be incorporated and water quantity <br />BMPs (as defined in this Rule) must be incorporated to the following <br />standards: <br />(i) BMP volume must retain the one -year event by providing at <br />least the volume equal to the runoff from a 2.3 -inch, 24 -hour <br />storm over the tributary area within the site under proposed <br />conditions. <br />(1) Infiltration BMPs (see District BMP standard plates and <br />design criteria) are to be incorporated in areas with A & B <br />hydrologic soil groups. Stormwater from impervious <br />surfaces other than rooftops must be pretreated before <br />discharge to infiltration BMPs, to remove sediment and <br />floatables, or other materials that would restrict the BMP's <br />capacity or contaminate ground water. <br />(2) In the following areas, the volume required by paragraph <br />8(b)(i) is to be provided by bio- filtration features or two -cell <br />wetland treatment systems (see District standard plates and <br />design criteria): <br />RCWD Proposed Rule RMP -3 20 <br />October 8, 2008 <br />