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City outlines Chromium‑6 compliance plan and pilot testing after lowered state limit
Summary
Los Banos staff reported that several wells exceeded the state’s lowered Chromium‑6 maximum contaminant level; the city’s compliance plan, approved by the state, calls for wellhead treatment across multiple wells and pilot testing of a reduction‑coagulation‑filtration system.
Interim City Manager Gary Vriese reported to the council on Oct. 15 that the city’s second quarter Chromium‑6 testing exceeded California’s revised maximum contaminant level (MCL) of 10 parts per billion at some well sources.
Vriese said the city submitted the required compliance plan to the State Water Board (Division of Drinking Water) on Sept. 29 and that the state approved the plan on Oct. 1. Under the approved plan the city intends to pursue wellhead treatment…
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