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P18-0078, P18-0080, P18-0081, PUD-130 and Tract 8569 (Hidden Canyon) Planning Commission <br />19 of 28 <br />management features, including a dedicated stormwater treatment basin designed to meet <br />municipal and regional requirements. With respect to wastewater, the project would connect to <br />the City’s existing sanitary sewer system and be subject to all applicable municipal and <br />regional wastewater regulations, including requirements that reduce inflow and infiltration, <br />promote efficient water use, and support treatment processes that minimize energy <br />consumption and associated greenhouse gas emissions. <br />By utilizing existing wastewater infrastructure and adhering to regulatory standards, the project <br />supports CAP objectives to reduce emissions associated with water conveyance and treatment <br />while ensuring long-term system efficiency and resilience. Collectively, these features <br />demonstrate consistency with the CAP’s overarching goal of reducing greenhouse gas <br />emissions while improving resource efficiency and infrastructure sustainability. <br />GRADING <br />Grading would cover approximately 21.2 acres, and approximately 129,850 cubic yards of <br />material would be generated from grading activities to construct the lots, streets, and <br />foundations. Another 14,630 cubic yards of material would be generated by trench spoils and <br />anticipated soil swelling (five percent), for a total of 142,200 cubic yards of cut and fill work. As <br />a result, the site grading would be balanced and neither off-haul nor import of dirt would be <br />required. <br />Grading on the development site has been designed to avoid potential impacts to Devany <br />Creek and associated vegetation and to provide a transition to the natural grades beyond the <br />building envelopes. All grading on the project site has been designed to eliminate grading <br />within areas of 25 percent slope or greater except for grading required to construct road <br />segments and a portion along the EVA. Figure 8 illustrates the grading boundaries and areas <br />affected by road only grading, which is provided as the last sheet in Exhibit B. <br />Figure 8: Slope and Grading Plan