An Aggressive I/I Abatement Program is Underway as Part of Vallejo's Wet Weather Program

摘要

The Vallejo Sanitation and Flood Control District (VSFCD) is undertaking an aggressivernpilot program to control wet weather flows and eliminate sanitary sewer overflows (SSO's)rnthat are in violation of its NPDES permit. The program involves extensive rehabilitation ofrnsewer mains, manholes, and service laterals (including laterals on private property) in fivernselected basins to remove defects that allow rainfall dependent infiltration and inflow (I/I) tornenter the sewer system. The rehabilitation projects were designed through extensive analysisrnof the District's system, including CCTV and smoke testing inspections, comprehensivernmapping of the system in a GIS format, flow monitoring, hydraulic modeling, assessment ofrnhistorical SSO records, and evaluation of maintenance records. This paper will present thernprocess of developing and implementing the I/I abatement program. Significant issues to bernconsidered include the following:rn1. Comprehensive development of maps and databases in GIS formatrn2. Analysis of inspection and hydraulic datarn3. Development of a pilot program to test the effectiveness of I/I abatementrn4. Issues related to replacing service laterals on private propertyrn5. Development of construction documentsrn Construction/implementation of the pilot programrn6. Next steps.