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Consultant Brian urges targeted flow monitoring after terracotta-pipe rehab reduced peak flows
Summary
At a special Marin City Council meeting Apr. 22, consultant Brian briefed council on long-term water-and-sewer planning, reported measurable reductions in wet-weather peaks after ARPA-funded repairs, and recommended a new flow-monitoring deployment (seven meters and rain gauge) to quantify benefits; staff estimated the study would cost roughly $45,000–$70,000.
Brian, the consultant presenting to the Marin City Council on April 22, told members that long-range water and sewer planning should guide the capital improvement program and prioritize projects to reduce inflow and infiltration (I&I). He described the system’s history — a plant built in the 1950s with biological nutrient upgrades in 2000 and later enhanced nutrient removal work — and argued that much of the system’s compliance risk stems from wet-weather flows entering the collection system.
Why it matters: Load-based permit limits for total nitrogen and phosphorus mean that reducing storm-driven flows has direct…
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