<br />Ordinance -- Page 4 of 9 <br />or replaced impervious surface areas, or an equivalent on-site area, that will result from <br />the water quality design storm. <br /> <br />(b) Stormwater quality facilities shall be selected based on the following priority order. <br /> <br />1. Infiltration shall be utilized for treatment of the water quality design storm <br />runoff unless one of the following site conditions exist: <br /> <br />1a. Infiltration rates are less than 2 0.6 inches per hour; <br /> <br />2b. Bedrock is less than 5 feet below the ground surface; <br /> <br />3c. Groundwater elevations are less than 6 feet below the ground surface; or, <br /> <br />4d. Ground surface slopes are greater than 10%. <br /> <br />2. If subsection (3)(b)1 exempts infiltration, extended filtration (filtration through <br />natural or engineered media) shall be utilized to treat the water quality design <br />storm runoff from the impervious surface areas. <br /> <br />3. If the development site has insufficient land area to construct an infiltration or <br />extended filtration facility to treat the water quality design storm runoff without <br />reducing the size of the proposed development, and the proposed development is <br />otherwise consistent with all other applicable lot and development standards, the <br />applicant shall demonstrate that there is insufficient land area by submitting a <br />report that includes a site plan of the proposed development and the required <br />sizing of the stormwater quality facility based upon the water quality design storm <br />requirement. <br /> <br />(c) An applicant that makes the demonstration required by subsection (3)(b)3 will be <br />subject to the Low Impact Development component of the City’s system development <br />charge improvement fee, including any system development charge credit for an approved <br />on-site mechanical treatment facility. <br /> <br />(b) For land use applications proposing the construction of a public street, stormwater <br />quality facilities to treat the stormwater runoff from the proposed public street shall be <br />selected from the Stormwater Management Manual and shall be based on the following <br />priority order: infiltration, filtration, mechanical treatment. <br /> <br />1. If selecting an infiltration or filtration facility to treat the stormwater runoff from the <br />public street, the facility can be sized to also treat the stormwater runoff from the single- <br />unit dwelling and duplex lots or parcels adjoining the public street based on full buildout <br />of those lots or parcels. <br /> <br />2. If using a mechanical facility to treat the stormwater runoff from the public street or <br />if the infiltration or filtration facility is not sized to also treat the stormwater runoff from <br />the adjoining lots or parcels at full buildout, all lots or parcels created by the land