<br />and redevelopment creating or replacing 1,000 square feet or more of impervious <br />surface area discharging stormwater to the municipal separate storm sewer system. <br /> <br />o EC 9.6792(3) Water Quality Standards. As proposed, this subsection would be amended <br />to emphasize and prioritize on-site retention of stormwater runoff through infiltration <br />and extended filtration. Infiltration and extended filtration facilities including vegetated <br />planters, rain gardens, swales and filter strips that improve water quality, reduce runoff <br />volumes, and can potentially increase capacity in the city’s stormwater system. These low <br />impact development and green infrastructure techniques seek to mimic a site’s natural <br />hydrology prior to development, thereby reducing the negative effects of stormwater <br />runoff on downstream rivers, lakes, streams and wetlands. <br /> <br />While the amendments will prioritize infiltration and extended filtration stormwater <br />quality facilities, applicants who do not have sufficient land area to install infiltration or <br />extended filtration facilities can participate in the Cities off-site stormwater mitigation <br />program through higher system development charges which will be used to construct off- <br />site stormwater facilities by the City. An applicant may demonstrate insufficient land <br />area by submitting a report setting forth the required size of the smallest infiltration or <br />filtration facility needed for the development’s impervious surface area and a site plan <br />demonstrating that an approved infiltration or filtration facility cannot be located on the <br />development site without reducing the size of the proposed development which is <br />otherwise consistent with all other applicable lot and development standards. <br /> <br />• EC 9.6793 Stormwater Flow Control (Headwaters). As proposed, this Section would be amended <br />to update 9.6793(2) to standardize the applicability criteria to align with the City’s NPDES permit. <br />The NPDES permit requirements apply to all new development and redevelopment creating or <br />replacing 1,000 square feet or more of impervious surface area discharging stormwater to the <br />municipal separate storm sewer system. <br /> <br />• EC 9.8030(24) Adjustment Review. Changes to the Adjustment Review provisions are to simply <br />correct and update the code references new stormwater standards. <br /> <br />Land Use Code Amendment Procedures and Approval Criteria <br />The Stormwater Code Amendments are subject to Type V application (legislative) procedures (EC 9.7500 <br />through EC 9.7560). An initial Planning Commission public hearing is scheduled for September 24, 2024, <br />which will be followed by deliberations prior to making a recommendation to the City Council. The City <br />Council will then hold their own public hearing and deliberate on the amendments prior to taking action <br />on the proposed land use code amendments. <br /> <br />Public notice and the opportunity to provide testimony is provided in accordance with the Type V <br />application procedures, which include a mailed notice to interested parties, a legal notice in the Register <br />Guard, and notice to the Oregon Department of Land Conservation and Development. Any written <br />testimony will be provided to the Planning Commission in advance of their deliberations. The <br />amendments are subject to the approval criteria at EC 9.8065. Draft findings demonstrating compliance <br />with the applicable approval criteria are included in Exhibit A within Attachment A to this AIS.