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Joint utility asks Cowlitz County to adopt updated pretreatment policy to protect plant and collection systems
Summary
Joe Jordan, general manager of Turwa, told county commissioners that updated pretreatment limits (based on a Gibson Olson study) establish daily maximums and monthly averages, add VOC discharge 'levels' based on King County guidance, and clarify permitting and right-of-entry language; the county must adopt the update (likely by ordinance) for it to take effect.
Joe Jordan, general manager of Turwa — the joint municipal utility authority that serves the cities and water districts in the region and Cowlitz County — presented an update to Turwa's pretreatment policy and asked the board to adopt it.
Jordan said the revisions respond to new data and a technical study by Gibson Olson that recalculated local discharge limits to protect the plant's biological treatment processes while allocating capacity fairly between current users and future growth. "The original policy ... was first adopted in 2012, and there has been no updates since that time," he…
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