REPORT TO COUNCIL
SUBJECT
Title
Accept Addendum 5 to the Program Environmental Impact Report (PEIR) for the Sunnyvale Water Pollution Control Plan (WPCP) Master Plan and Approve the Plan for the Secondary Effluent Pipeline Replacement Project in Accordance with the California Environmental Quality Act (CEQA)
Report
BACKGROUND
The City of Sunnyvale owns and operates the Donald M. Somers Water Pollution Control Plant (WPCP), located at 1444 Borregas Avenue in Sunnyvale, Santa Clara County. The WPCP provides treatment of wastewater flows and loads from domestic, commercial, and industrial sources in Sunnyvale, Rancho Rinconada, and Moffett Field. The WPCP was originally constructed in 1956. With the enactment of the Clean Water Act in 1972, more restrictive water quality standards were established, requiring expansion of and process upgrades to the WPCP.
The City was the lead agency for the Sunnyvale WPCP Master Plan Program Environmental Impact Report (PEIR); State Clearinghouse No. 2015062037). The City adopted and certified the PEIR and approved implementation of the WPCP Master Plan on August 23, 2016. The PEIR evaluated potential environmental impacts that could occur as a result of implementing the Master Plan and included mitigations to reduce the intensity of potential environmental impacts. As part of Master Plan approval, the City adopted a Mitigation Monitoring and Reporting Program.
As part of the WPCP Master Plan process, the City identified the need to rehabilitate two existing pipelines. The first is an existing 60-inch primary effluent pipeline from the main plant to the pond recirculation channel (also called the pond return channel). The second is an existing 36-inch secondary effluent pipeline from the oxidation ponds to the fixed growth reactor distribution structure. The Master Plan noted that rehabilitation of the existing primary effluent pipeline would include either sliplining or placing cure-in-place pipe within the existing pipeline. ...
Click here for full text