2019-107 - Proposed Addington Multi-Family Residential Project

Home Browse Search

For these reasons detailed in the DEIR, the Project's cumulative effects relating to water supplies would not be cumulatively considerable when considered with past, current, and future probable projects. (DEIR, pp. 4.13-8.) This conclusion also applies, for the same reasons, to the Modified Project. Wastewater DEIR Section 4.13, Utilities and Service Systems, the existing sewer system has sufficient capacity to handle the increased flows resulting from implementation of the proposed Project. Additionally, the OCSD reclamation facilities have an average flow of 184 mgd and a treatment capacity of 462 mgd (OCSD, 2017). Due to this volume of excess capacity that is designed by OCSD to accommodate future regional growth, the increase in wastewater flow from the proposed Project that would require 0.04 percent of this remaining capacity would not significantly impact the OCSD reclamation facilities. As a result, impacts related to cumulative projects wastewater treatment and conveyance capacity would be less than significant. For these reasons detailed in the DEIR, the Project's cumulative effects relating to wastewater treatment and conveyance would not be cumulatively considerable when considered with past, current, and future probable projects. (DEIR, pp. 4.13-12.) This conclusion also applies, for the same reasons, to the Modified Project. Drainage and Water Quality All projects in the watershed are required to implement measures to comply with the LID, MS4 Permit, DAMP requirements for implementation of SWPPPs and WQMPs. These requirements were developed to reduce the cumulative impacts to water quality, and to ensure that the incremental effects of individual projects do not cause a substantial cumulative impact related to water quality. Implementation of the proposed Project would include compliance with all required laws, permits, and plans, through implementation of a SWPPP and WQMP that would be approved by the City prior to construction and operational permits and have been designed to reduce impacts associated with drainage and water quality. The proposed Project would result in a decrease in impervious surfaces due to the increase in landscape and open space areas. Additionally, the DAMP required runoff volume would be filtered through the detention and drywell systems prior to discharge off -site to manage stormwater drainage and protect water quality. The detention and drywell treatment systems have high removal effectiveness for all storm water pollutants of concern. Thus, the runoff volume that would result from the proposed Project would not increase, and the proposed treatment systems would remove pollutants from onsite runoff. Therefore, the proposed Project would not generate volumes of stormwater flows or polluted runoff that could combine with other projects to be cumulatively considerable. As a result, cumulative impacts from implementation of the proposed Project would be less than significant. For the reasons discussed in the DEIR, the Project's cumulative effects relating to drainage and water quality would not be cumulatively considerable when considered with past, current, and future probable projects. (DEIR, pp. 4.13-19.) This conclusion also applies, for the same reasons, to the Modified Project. 10.0 FINDINGS REGARDING SIGNIFICANT IRREVERSIBLE ENVIRONMENTAL CHANGES AND ENERGY USE Resolution No. Page 64 of 76 Certification of the Magnolia at the Park EIR