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included with this RPCA as Attachment A, but the following paragraphs identify and briefly 24 explain the proposed changes encompassed in the zoning amendment. 25 All instances of “pavedsurfaces and building footprints” have been changed to 26 “impervious surfaces.” 27 Parcels in Shoreland and Wetland Management Districts are treated more distinctly, in a 28 separate paragraph, from other, non-riparian parcels. This is to better specify that 29 shoreland and wetland parcels are subject to additional regulations contained in Chapter 30 1017 (Shoreland, Wetland, and Storm Water Management). 31 Specific references to the Residential Storm Water Permit (ReSWP) have been replaced 32 with references to “approvals from the City Engineer.” The ReSWP remains one of the 33 City Engineer’s regulatory tools, but additional tools are presently being considered, and 34 still others may be introduced in the future. Eliminating the reference to specific tools, 35 like the ReSWP, allows the zoning text to remain unchanged as the list of available 36 options changes over time. 37 The current code requires that properties be at least 20 years old in order to qualify for the 38 flexibility afforded by the ReSWP (and, by extension, the other optionsas noted above), 39 but Planning Division and Engineering staff are proposing to eliminate the age 40 qualification. When this provision was initially instituted, it was almost entirely geared 41 toward accommodating and mitigating more impervious coverage becausethe options for 42 permeable pavements were much more limited. Now that many more options have 43 become available, staff feels that eliminating the age restriction can encourage greater use 44 of permeable paving systems. 45 The impervious surface limit in the LDR-2district is raised to 40%, rather than the 50% 46 figure initially discussed a few months ago.Public Works staff has revised its position on 47 the maximum percentageof hard surfacesallowed because the present zoning amendment 48 and storm water management regulations treat impervious surfaces differently than hard 49 surfaces that are permeable. In reaching this recommendation, Public Works staff 50 analyzed the hydrology of LDR-2 parcels with 30% and 40% impervious surface 51 coverage; because staff found that storm water from 40% coverage would be generally 52 acceptable, and because existing LDR-2 parcels have an average of 38% coverage, Public 53 Works staff supports a 40% impervious coverage limit in the LDR-2 districtas proposed. 54 While it need not be specified in the zoning text,it is worth noting here thatthe Public 55 Works Department’sadministrativestorm water mitigation regulations forLDR-1 and -2 56 districts will cap hard surfaces (including impervious coverage andpermeable 57 pavements) at 50% of the parcel area. 58 PC UBLIC OMMENT 59 At the time this report was prepared, Planning Division staff has not received any communication 60 about the proposed amendment from members of the public. 61 RA ECOMMENDEDCTION 62 By motion, recommend approval of the proposedzoning text amendment, based on the 63 comments and findings of this report. 64 PROJ0017-Improvement_Area-RPCA_20160803 Page 2of 3