§ 24.20.130. Frequently flooded areas—New on-site sewage disposal systems.

A.

New on-site sewage disposal systems shall be located outside the one-hundred-year floodplain, floodway, coastal high hazard areas, and high ground water flood hazard areas, including the no development and restricted development zones. This may require systems that provide a higher level of sewage treatment. The sewage disposal system shall be located as far from the frequently flooded area as possible. Also see Article IV, the Rules and Regulations of the Thurston County Board of Health Governing Disposal of Sewage, and WAC 173-160-171.

B.

New on-site sewage disposal systems shall be located outside the one-hundred-year channel migration hazard area, except as provided in Chapter 24.50 TCC. This may require systems that provide a higher level of sewage treatment. The sewage disposal system shall be located as far from the frequently flooded area as possible. Also see Article IV, the Rules and Regulations of the Thurston County Board of Health Governing Disposal of Sewage, and WAC 173-160-171.

C.

Failing on-site sewage disposal systems shall be immediately remedied consistent with the Rules and Regulations of the Thurston County Board of Health Governing Disposal of Sewage, Chapter 14.38 TCC, and, if applicable, Chapter 24.25 TCC. The approval authority may require the applicant to demonstrate that due to physical constraints (e.g., topography, soil conditions or the configuration of the site), another site configuration would not allow the development to occur without intrusion or with less intrusion into the hazard area than the proposal.

(Ord. No. 14773, § 3(Att. B), 7-24-2012)