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What does the STEP Association system include?The STEP Association manages the sewer pipes, shutoff valves, and a treatment facility where chlorine is injected into the wastewater. Chlorine injection pre-treats our wastewater to keep wastewater induced pipe corrosion, caused by hydrogen sulfide, in check as it flows to the City of Gig Harbor Wastewater Treatment Plant. The Association maintains Reserve Funds in the event we need to replace aging equipment and infrastructure.