Title
Revisions to the Septic Tank Effluent Pumping (S.T.E.P.) System Regulations - Deliberations
Recommended Action
Move to recommend City Council approve proposed revisions.
Report
Issue:
Whether to recommend City Council approve proposed revisions to the Septic Tank Effluent Pumping (S.T.E.P.) System Regulations.
Staff Contact:
Diane Utter, P.E., Water Resources Engineer, 360.753.8562
Presenter(s):
Diane Utter, P.E., Water Resources Engineer, 360.753.8562
Background and Analysis:
Septic Tank Effluent Pumping (S.T.E.P.) systems are sewer services that utilize individual tanks and pumps at residences and commercial sites. Wastewater liquid is pumped directly into the sewage collection system. The tank collects solids, which are then pumped periodically, usually every seven years. The City is responsible for the maintenance and pumping of the vast majority of S.T.E.P. systems within the city limits and urban growth area.
The 2007 Wastewater Management Plan significantly restricted the use of S.T.E.P. systems. Restrictions on S.T.E.P. systems were based on additional maintenance costs per service connection and odor and corrosion problems associated with elevated hydrogen sulfide concentrations. Current City regulations permit the use of S.T.E.P. systems only to serve existing lots adjacent to existing S.T.E.P. mains. This has left a number of otherwise subdividable properties and small investors stranded without sewer service for the foreseeable future.
The 2013 Wastewater Management Plan proposed allowing new S.T.E.P. systems for infill. This was a strategy under "Objective ID: Facilitate the orderly expansion of the public sewer system." This objective is in support of the goal stating "Clean Water Act and Safe Drinking Water Act standards are met."
The proposed changes are supported by two 2014 Comprehensive Plan goals:
* Goal GL16 "The range of housing types and densities are consistent with the community's changing population needs and preference...
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