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REDWOOD CITY <br />specific locations for project opportunities within certain subwatersheds are <br />yet to be determined. <br />Second: As depicted in Figure 6, a 17.6% reduction of modeled PCB for <br />Redwood City was identified as the target reduction to be attained through <br />the implementation of GI (for Scenario 1, cohesive sediment reduction is used <br />as a surrogate to represent load reduction of PCBs). <br />Third: SUSTAIN is used to provide cost -optimization and selection of the most <br />cost-effective combination of GI projects to attain the target reduction. In <br />Figure 6, this solution can be viewed as the vertical slice that intersects the <br />point on the x-axis at 17.6% reduction. The combination of GI structural <br />capacities in that slice at the 17.6% load reduction represents the proposed GI <br />implementation plan for Redwood City produced by the model. <br />Table 2 provides details on that implementation plan for the ten <br />subwatersheds within Redwood City's jurisdiction (represented by each row <br />in table). Optimization results recommend thatvarying amounts of GI capacity <br />in different subwatersheds (different rows) are needed to achieve the most <br />cost-effective solution, but the overall PCBs load reduction addresses 17.6% <br />(bottom row of table). The relative amount of GI capacities (normalized by <br />area) for each subwatershed are shown in the map in Figure 7. <br />�OtherGl Projects (T131)) <br />11: Redwood City <br />Green Streets (Low) <br />120 <br />Green streets (Medium) <br />I <br />iiiiiiiiGreen Streets(High) <br />Target: 17.6% Reduction <br />100 <br />projects (identified) <br />Capacity: 57.9 acre�h <br />11111111111111111leglonal <br />Cost: 0.39% <br />20 <br />Ewsting Projects <br />—Total Capital Cost <br />o Selected Solution <br />0 <br />056 5% 10% 15% 20% 25% 30% 35% <br />Percent Reductlion in Cohesive Sediment <br />Figure 6. Scenario 1: Optimization <br />regional identified pr <br />RWC GREEN INFRASTRUCTURE PLAN <br />ATTY/RESO.0075/CC RESO <br />REV: 06-20-19 PR <br />GREEN INFRASTRUCTURE PLAN <br />90% <br />80% <br />0 <br />60% E <br />50% E <br />40% e <br />30% o <br />c <br />a <br />20% <br />a <br />10% <br />L 056 <br />40% <br />for Redwood City (sediment target, with <br />20 JUNE 2019 <br />THE GREEN INFRASTRUCTURE PLAN — EXHIBIT RESO. NO. 15780 <br />MUFF NO. 802 <br />