AC26 From Failing Septic Systems to Sustainable Futures: Sewer Solutions for Disadvantaged Communities in Sacramento County
Recorded On: 04/07/2026
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A new tool is available for concrete cylinder force main condition assessment: electromagnetic (EM) thickness testing. This tool does not require destructive methods that increase risk and defeat the purpose of assessment, nor does it require deployment of equipment on the inside of the pipe. V&A is piloting a technique developed in the oil and gas industry to use an EM probe on the outside of the pipe to measure metal thickness. Ross Valley Sanitary District's seven-mile force main system is about 42% reinforced concrete cylinder pipe (RCCP), with a steel cylinder surrounded by cement and outside steel reinforcing, installed between 1958 and 1986. RVSD would prefer avoidance of costly replacement if a non-destructive condition assessment technique would indicate more years of remaining service. The application of EM testing to a section of RCCP pipe along a known corrosion gradient will be presented, along with costs, equipment, procedures and results, and the potential application of EM testing in RVSD's broader condition assessment program will be discussed.
Learning Objectives:
Understand electromagnetic testing equipment, procedures, and costs, and how they relate to metal thickness of force main assets and their remaining useful life.
Understand how the study of a gradient of defective pipe, using corroded section of bypass force main, demonstrated the usefulness and sensitivity of EM testing to measure metal pipe thickness.
Evaluate whether to invest in electromagnetic testing as a targeted condition assessment tool and compare it with other force main condition assessment techniques and force main management approaches.
AC26 Recorded Sessions Sponsored By:
Monique Day, MS, PE
Principal Engineer
West Yost Associates
Monique Day has 22 years of experience as an engineer in water resources planning and has been with West Yost Associates in Davis for 21 years. Monique’s experience includes integrated water resources planning, urban water management planning, water reuse planning, and supporting clients in a range of areas such as water transfers, permitting, conservation, surface and groundwater storage, conjunctive use, water rights, and water quality. Much of Monique’s project work has involved multi-stakeholder planning and implementation processes, project management, and funding strategy and pursuits. She is the consultant Project Manager for the Sacramento Area Sewer District’s Septic to Sewer Evaluation Program and has assisted the District with identifying and applying for funding for the District’s top-priority disadvantaged communities.
Monique has a bachelor’s degree in Environmental Studies from U.C. Santa Cruz, a bachelor’s degree in Civil and Environmental Engineering from U.C. Berkeley, and a master’s degree in Environmental Engineering from U.C. Berkeley.
Christina Ramirez, MS, PE
Senior Engineer
West Yost
Christina Ramirez, MS, PE, is a Senior Engineer and Project Manager at West Yost in Sacramento, California with more than 14 years of experience in civil engineering. She specializes in the design and construction of water and wastewater infrastructure, having overseen and contributed to projects encompassing over 180 miles of pipeline. Christina's experience includes grant funded septic-to-sewer conversions, preparation of construction documents and permit applications, design of trenchless crossings for various rights-of-way, and extensive community engagement. She enjoys collaborating closely with clients and multidisciplinary project teams to deliver innovative, cost-effective, and sustainable infrastructure solutions for communities throughout California.
Anne Tran, P.E
Associate Civil Engineer
Sacramento Area Sewer District
Anne Quach Tran, P.E., is an Associate Civil Engineer at the Sacramento Area Sewer District (SacSewer). With over 23 years of experience in planning, design, and construction, Anne has successfully led and developed complex, multi-stakeholder programs. She currently manages the Septic-to-Sewer Program, securing nearly $47M in local, state, and federal grants. She provides strategic direction and coordination to support the construction of 51,600 linear feet of sewer infrastructure in five severely disadvantaged communities. She has a bachelor’s degree in Civil Engineering from U.C. Davis.
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