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Wallace Group presents 30% design life‑cycle cost draft for Los Olivos sewer project
Summary
At a technical subcommittee meeting, Wallace Group presented a 30% design life‑cycle cost draft for a proposed Los Olivos sewer project and told board members it remains a draft for comment; key next steps include sensitivity analysis and coordination with Solvang and the county.
Wallace Group representative Carrie told the Los Olivos Community Services District technical subcommittee that the firm posted a 30% design life‑cycle cost draft to solicit board and public input, noting reviewers had only recently received the document. “Im just here to answer questions,” Carrie said, adding that comments already received would be incorporated into the final report.
The document is a working draft, Carrie and board members said, and Wallace Group offered a sensitivity analysis to test how assumptions—such as pipe attachment methods, dewatering needs and depth changes—would change cost estimates. Carrie said some assumptions can be tightened with available data but others will require additional study. “When you adjust some of the numbers, some of them can have a large impact in the overall life cycle analysis, and some have absolutely no tweak whatsoever,” she said.
Board members pressed for clarifications about specific cost items the draft uses: potholing allowances, whether private effluent tanks are owner‑installed under a step system, and whether easement acquisition and legal costs were included. Carrie confirmed the draft assumes private property owners would install step‑system components and that easement legal costs still need to be added to the final estimate. The subcommittee agreed the next design phase should include clearer assumptions and additional coordination with Solvang and Santa Barbara County before the assessment numbers are finalized.
The subcommittee did not take formal policy action on the draft; members instructed staff to return with refined cost assumptions and a scope for a sensitivity analysis for the 60% design phase.
