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REDWOOD CITY was performed for GI project categories within each model subwatershed and municipal jurisdiction, and supports the selection of the most cost-effective implementation strategy to attain pollutant reduction goals. The RAA builds upon the previous planning efforts and represents the following generalized GI project categories in the model: • Existing Projects: Stormwater treatment and GI projects that have been implemented since FY -2004/05. This primarily consists of all of the regulated projects that were mandated to treat runoff via Provision C.3 of the MRP, but also includes any public green street or other demonstration projects that were not subject to Provision C.3 requirements. For regulated projects in the early years of C.3 implementation, stormwater treatment may have been achieved through non -GI means, such as underground vault systems or media filters. • Future New Development and Redevelopment: All the regulated projects that will be subject to Provision C.3 requirements to treat runoff via LID and is based on spatial projections of future new and redevelopment tied to regional models for population and employment growth. • Regional Projects (identified): C/CAG worked with agencies to identify five projects within public parks or Caltrans property to provide regional capture and infiltration/treatment of stormwater, and included conceptual designs to support further planning and designs. Note — the model can be updated to include future identified projects to support adaptive management. • Green Streets: The SRP identified and prioritized opportunities throughout San Mateo County for retrofitting existing streets with GI in public rights-of-way. Green streets were ranked as high, medium, and low priority (within each subwatershed) based on a multiple -benefit prioritization process developed for the SRP. • Other GI Projects (to be determined): Other types of GI projects on publicly owned parcels, representing a combination of either additional parcel -based GI or other Regional Projects. The SRP screened and prioritized public parcels for opportunities for onsite LID and Regional Projects. These opportunities need further investigation to determine the best potential projects. The RAA considers the numerous GI project opportunities that exist within each municipal jurisdiction, and selects a suite or "recipe" of projects that can most cost-effectively address pollutant load reductions. The amount and combination of those GI projects can be determined through analysis of estimated load reductions and implementation costs. Figure 4 presents an example GI recipe showing the distribution of selected GI project categories versus incremental reductions in pollutant loading and increasing cost. Cost- RWC GREEN INFRASTRUCTURE PLAN GREEN INFRASTRUCTURE PLAN ® Future New and Redevelopment ........................ --------------- ---------- 0 Existing Projects Implementation Cost s) Figure 4. Example Implementation Recipe Showing General Sequencing of GI Projects. 15 JUNE 2019 ATTY/RESO.0075/CC RESO APPROVING THE GREEN INFRASTRUCTURE PLAN — EXHIBITA RESO. NO. 15780 REV: 06-20-19 PR MUFF NO. 802