City of San Carlos - Sewer System Management Plan (SSMP)


Sewer - Sewer Systems Management Plan (SSMP)

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This introductory section provides background information on the purpose and organization of the Sewer System Management Plan (SSMP), as well as a brief overview of the City’s service area and sewer system.

SSMP Requirement Background

This SSMP has been prepared in compliance with requirements of the San Francisco Bay Regional Water Quality Control Board (RWQCB) pursuant to Section 13267 of the California Water Code, as described in the letter from the RWQCB to the City of San Carlos (City) dated July 7, 2005. The RWQCB letter mandates that the City prepare an SSMP following the guidelines in the SSMP Development Guide prepared by the RWQCB in cooperation with the Bay Area Clean Water Agencies (BACWA). The City must also comply with RWQCB sanitary sewer overflow (SSO) electronic reporting requirements issued in November 2004.

More recently, the State Water Resources Control Board (SWRCB) acted at its meeting on May 2, 2006 to require all public wastewater collection system agencies in California with greater than one mile of sewers to be regulated under General Waste Discharge Requirements (GWDR). The SWRCB action also mandates the development of an SSMP and the reporting of SSOs using an electronic reporting system. The SWRCB SSMP requirements are similar to the RWQCB requirements, but differ in organization and some details.

Document Organization

This SSMP is intended to meet the requirements of both the RWQCB and the Statewide GWDR. The organization of this document is consistent with the RWQCB guidelines, but the contents address both the RWQCB and SWRCB requirements. The SSMP includes eleven elements, as listed below. Each of these elements forms a section of this document.  Parentheses indicate the title of the comparable SWRCB element.

SSMP Sections 1-11 ( PDF 1 MB) or download the full package ( PDF 7.42 MB)

  1. Goals
  2. Organization
  3. Overflow Emergency Response Plan
  4. Fats, Oils and Grease Control Program
  5. Legal Authority
  6. Measures and Activities (Operation and Maintenance Program)
  7. Design and Construction Standards (Design and Performance Provisions)
  8. Capacity Management (System Evaluation and Capacity Assurance Plan)
  9. Monitoring, Measurement, and Program Modifications
  10. SSMP Audits
  11. Communication Plan  

Appendices: [PDF links coming soon]

Supporting information for each element is included in an appendix associated with that section, as applicable. In general, information expected to require relatively frequent updates (such as names and phone numbers of staff) are included in appendices, as well as other supporting information, such as forms or schedules.

City Service Area and Sewer System

The City of San Carlos covers a 5.36 square mile area in San Mateo County adjacent to the City of Belmont and the City of Redwood City. The City had a population of approximately 28,000.  The City’s sewer system consists of approximately 106 miles of pipe. Pipe diameters range from 5 to 27 inches. The system includes six lift stations owned and maintained by the City (Kelly I, Kelly II, Lower Crestview, Upper Crestview, Tierra Linda, and Associated lift stations) as well as many privately-owned lift stations. Collected sewage is conveyed to the South Bayside System Authority sewer system for treatment.

Summary of Sewer System Facilities

Sewer Pipe Size in diameter (in inches)

Length (in feet)

5”-7” (odd sizes) field verification in progress
























Grand Total

557,451 ft (105.6 miles)

Total Sewer Manholes/Junction Boxes