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Ordinance No 20619 Exhibit A stormwater runoff from the development being proposed by the applicant. (c) An application for a development permit that is not exempt under subsection (b) above including an application pertaining to a development that is subject to an agreement with the City of Eugene demonstrating that a stormwater facility approved pursuant to subsection (a) above will treat some, but not all, of the stormwater runoff from the proposed development: 1. Shall include stormwater quality facilities selected from the Stormwater Management Manual based on the following priority order: infiltration, filtration, off-site stormwater quality management. 2. If selecting a filtration treatment facility, shall include a report that demonstrates at least one of the following development site conditions exist: a. Infiltration rates are less than 2 inches per hour; b. Bedrock is less than 5 feet below the ground surface; C. Groundwater elevations are less than 6 feet; or, d. Ground surface slopes are greater than 10%. 3. If selecting off-site stormwater quality management by contributing to the public off-site stormwater quality facilities, through payment of a higher stormwater system development charge adopted as part of the city's system development charge methodology, shall include a report that demonstrates there is insufficient land area to construct an approved infiltration or filtration facility by setting forth the required size of the smallest infiltration or filtration facility needed for the development's impervious surface area and a site plan demonstrating that an approved infiltration or filtration facility cannot be located on the development site without reducing the size of the proposed development which is otherwise consistent with all other applicable lot and development standards. 4. Shall design the selected stormwater quality facilities to treat all stormwater runoff from all new or replaced impervious surface areas, or an equivalent on-site area, that will result from the water quality design storm, in combination with any agreement with the city for off-site treatment of some stormwater runoff from the proposed development site. The selected stormwater quality facility does not need to treat the stormwater runoff from new or replaced impervious surface that is 500 sq. feet or less and does not gravity -feed into the selected treatment facility. 5. Shall site, design, and construct all stormwater quality facilities according to the water quality provisions and the facility design requirements set forth in the Stormwater Management Manual. 6. The standards in EC 9.3155(17)(c) may be adjusted based on the criteria set out at EC 9.8030(24)(a) and (b). Page 10 of 39