Consultants explain how STEP systems differ from gravity sewers
Parametrix and Orenco Systems staff explained functional differences between STEP and gravity sewer systems—focusing on sludge and scum capture and retrofit tank configurations—and said retrofit approaches may use separate dosing tanks or combined tanks depending on site conditions.
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Consultants at the May 7 work session described key operational differences between STEP systems and conventional gravity sewers. The group emphasized that STEP systems handle sludge and scum differently and that that difference affects tank design and maintenance expectations. Jonathan of Orenco Systems clarified retrofit practice: "retrofits often use a separate dosing tank" but added that "both combined and separate configurations can work depending on site conditions." (statement summarized from the meeting notes.)
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