Sewer System Management Plan (SSMP)

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The City of Vacaville’s Sewer System Management Plan (SSMP) contains information on City programs and plans for operation and maintenance of the wastewater collection system. Each element of the SSMP describes how the City complies with the Statewide General Waste Discharge Requirements (WDRs) for Sanitary Sewer Systems.

The SSMP was originally adopted by the City of Vacaville on July 9, 2009, and recertified on July 23, 2019. As required by the WDRs, SSMP self-audits are completed every two years. The most recent self-audit was finalized concurrently with re-certification in July 2019. The City's SSMP document is subject to change as needed to comply with required regulations.

The current SSMP is available for public review and inspection during regular business hours (8:00 a.m. – 4:30 p.m., Monday-Friday) by contacting Miguel Medina, Assistant Utilities Engineer, (707) 469-6400.

Statewide General Waste Discharge Requirements for Sanitary Sewer Systems

The State Water Resources Control Board (State Water Board) has adopted order number 2006-0003-DWQ, Statewide General Waste Discharge Requirements for Sanitary Sewer Systems, for collection systems. This order is intended to promote proper management of wastewater collection systems and reduce the occurrences of sanitary sewer overflows (SSOs).

The State Water Board maintains records of all SSOs reported to them and publishes the information in an incident map updated nightly.

SSMP Elements

Introduction & Element 1 describe the City’s Goals for the SSMP.

Element 2 describes the City’s Organizational structure related to sanitary sewer management.

Element 3 describes the City’s Legal Authority to manage the sewer system.

Element 4 describes the City’s Operations and Maintenance program of the sanitary sewer collection system. City Sewer Maintenance Field Utilities maintain the underground sewer collection system.

Element 5 describes the City’s Design and Performance Provisions including Standards for installation, rehabilitation and repair of sanitary sewer systems. The City requires that the work related to sanitary sewer system design and construction must follow the City’s standard specifications, details, and special provisions. In addition, this element describes the City’s inspection and testing requirements for the sanitary sewer system new installations, rehabilitation work, and repair work.

Element 6 describes the City’s Overflow Emergency Response Plan. This plan describes the field procedures to properly handle a sanitary sewer overflow along with the reporting requirements per the WDRs.

Element 7 describes the City’s Fats, Oil, and Grease (FOG) program. This program is designed as a preventive program to ensure that FOG related sanitary sewer overflow events are reduced based on permitting and outreach to commercial customers and education of residential customers on proper handling of fats, oils, grease, and food scraps.

Element 8 describes the City’s System Evaluation and Capacity Assurance Plan (SECAP) for sanitary sewer system capacity evaluation, design criteria and capacity enhancement measures. The capacity analysis is conducted through the Hydraulic modeling software using the criteria described in the City’s Wastewater System Master Plan (Master Plan). The Master Plan is used to schedule and implement the Capital Improvement Program (CIP) projects. The CIP and the Master Plan are used to determine the needed funding and funding sources.

Element 9 describes the City’s Monitoring, Measurement, and Program Modifications (MMPM), including maintaining the relevant information to prioritize SSMP activities, monitor and measure effectiveness of each SSMP element, assess the success of Preventative Maintenance Program, update the program elements based on the monitoring/performance evaluations and identify and illustrate sanitary sewer overflow trends.

Element 10 describes the City’s plan for the SSMP Program Audits. The City will conduct the internal audits every two years to determine the effectiveness of the SSMP elements and programs. A list of priority improvement opportunities will be prepared and updated as part of the audit program.

Element 11 describes the City’s Communication Program. This element includes the steps to communicate with the pubic on the development, implementation, and performance of the SSMP.

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