REPORT TO COUNCIL
SUBJECT
Title
Action on an Agreement for Design Professional Services with V&A Consulting Engineers, Inc. for the Sanitary Sewer System Inflow and Infiltration Evaluation for Chromite, Machado and Cabrillo Tributary Area Project
Report
BACKGROUND
The City has a current population of approximately 130,000 and is served by a wastewater collection system consisting of approximately 270 miles of sewer pipelines and seven sewage pump/lift stations. The system collects wastewater flows generated within the City limits as well as flows from a major portion of the Cupertino Sanitary District (CuSD) via a connection at Homestead Road and Swallow Drive. Flow is conveyed eastward to the City of San Jose's interceptor sewer on Zanker Road, and northward to the Northside and Rabello Pump Stations, where the flow is pumped to the San Jose/Santa Clara Regional Wastewater Facility (RWF) for treatment and disposal.
The City's sanitary sewer master plan update was completed in 2016. As part of the update, flow monitoring was conducted in winter 2014-2015 and the results showed high inflow and infiltration in the Chromite, Machado, and Cabrillo sewer tributary area (Project). The same area also showed high inflow and infiltration in 2006 flow monitoring. High inflow during rain events and high infiltration from ground water year-round in the sewer lines reduces sewer conveyance capacity of the City's sewer system and increases flow to the wastewater treatment facility.
The Project area is roughly bounded by El Camino Real, Bowers Avenue, Monroe Street, and the western city limits, which is approximately 1.25 square miles with 27 miles of sewer pipelines. The sewer pipelines within the Project are various sizes ranging from 8 to 27 inches in diameter.
DISCUSSION
A formal Request for Proposal (RFP) selection process was utilized to solicit proposals from consultants to provide the professional engineering services needed to evaluate high inflow and i...
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