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Exhibit B has on the stormwater system. Compliance with the City's NPDES permit is extremely important and is dependent in substantial part on the City's ability to limit the quantity of stormwater that leaves development sites and that must be conveyed and treated before entering the State's waterways. The University area neighborhood specific standard at EC 9.2751(17)(c)3. requires that all roofed areas be included as part of the maximum 50 percent lot coverage, whereas the standard that applies to the rest of the city does not include roof eaves, or carports, porches, and balconies that are open at least 50 percent of their respective perimeter in the calculation. It is reasonable that accessory dwellings within the city -recognized boundaries of Amazon Neighbors, Fairmount Neighbors and South University Neighborhood Association ("the university area neighborhoods') are subject to specialized area -specific standards. The standards contained in EC 9.2751(17)(c) were adopted as interim protection measures for the existing single-family neighborhoods surrounding the University of Oregon (Amazon, Fairmount and South University), which have in recent years experienced a substantial increase in unforeseen housing development associated with the skyrocketing demand for student housing in the proximity of the university. Residents of those neighborhoods supported this regulation as a way to help make the new development less impactful on the livability of the neighborhood. Livability is an important Statewide Planning Goal 14 concept, along with accommodating the need for compact development. As part of Envision Eugene, the city is committed to completing area planning for the university area neighborhoods, including consideration of specific design standards for housing to addresses impacts from proximity to the University of Oregon. The interim protection measures are intended to limit further negative impacts until the area planning process is completed. It is expected that these interim measures will be replaced by a more comprehensive set of development and design standards established as part of the area planning effort. Until such that occurs, it is reasonable to limit overall building coverage on a lot in those areas. Table 9.2750 Residential Zone Development Standards See EC 9.2751 Spec DevelO Tent Standards for Table 9.2750. R-1 R-1.5 R-2 R-3 R-4 Outdoor Living Area 13 Minimum Total Open Space — 20% of dev. site 20% of dev. site 20% of dev. site Findings: A minimum requirements for outdoor living area/open space on a development site is related to both siting and design because it requires the accessory dwelling to be designed (building size) and located on the lot in such a way to ensure at least 20 percent of the development site is in open space. This 20 percent requirement for ADU lots in the R-2, R-3 and R-4 zones is reasonable because it addresses overcrowding concerns and the livability needs that are satisfied by a yard or open space. It applies universally to all dwelling types and uses in the R-2, R-3 and R-4 zones, which are higher density zones. For the R-2 zone, the outdoor living area/open space can be included as part of the 50 percent of the lot not covered by building (lot coverage). 13