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(1) No person shall install or cause to be installed a new on-site sewage system, nor perform any alteration, extensions or relocations, or connections to an existing on-site sewage system, including repair of failing sewage systems, without a valid permit issued by the Health Officer. Larger on-site sewage systems approved by the State are exempt from this permit requirement, except that when Environmental Health Services has a written agreement with the State to review and approve larger on-site sewage systems, a permit shall be required. Permits for alterations, expansions, or repairs shall be so identified. All systems shall be designed by a professional engineer, licensed under Chapter 18.43 RCW, or on-site sewage treatment system designer, licensed under Chapter 18.201 RCW. Designs submitted by residential owners shall not be accepted. Application for such permit shall be made in writing in a manner prescribed in subsection (2) of this section. All permit applications shall be completed and signed by the licensed professional engineer or designer prior to permit issuance as provided by WAC 246-272A-0200. All applications for new construction shall be accompanied by an approved site registration.

(2) When applying for a permit to install an on-site sewage system, a detailed construction plan of the proposed system is required. The construction plan shall contain information as required by the Health Officer in sufficient detail and to a scale which will permit a proper evaluation of the application. Each application shall contain the information required in WAC 246-272A-0200(1)(d) as a minimum.

(3) Permits are transferable with property ownership.

(4) If the system is not installed before the permit expires, a new permit may be applied for based on standards in effect at the date of the new application.

(5) Changes in use of an existing OSS may be authorized by the Health Officer. If the proposed changes in use of an existing sewage system will, in the opinion of the Health Officer, substantially change the waste strength or increase the projected daily sewage flow beyond the capacity of the OSS, a permit to alter the OSS as per WAC 246-272A-0290 shall be obtained prior to authorization of the change of use.

(6) Any misrepresentation or inaccuracy in the construction plan, whether intended or accidental, shall be considered as grounds for invalidating and voiding any permit issued under this section. The applicant is responsible for the accurate representation of all information presented.

(7) For any on-site sewage system proposed to serve a structure requiring a flood control zone permit under the provisions of Chapter 86.16 RCW and Chapter 508-60 WAC or requiring a floodplain certification by Clallam County under the provisions of the floodplain management ordinance, CCC Title 32, the installation permit shall not be issued until a flood control zone permit or floodplain certification has been issued in accordance with Chapter 32.02 CCC. The on-site sewage permit shall be in compliance with the flood control zone permit or floodplain certification.

(8) Expiration of Permits.

(a) Every sewage disposal permit issued by the Health Officer under the provisions of this chapter for new construction or expansion shall expire and become null and void if the work authorized by such permit is not completed within three years from the date of issuance.

(b) Repair permits shall expire six months from the date of issue. They may be renewed for six additional months if the Health Officer determines it is warranted and there is no surface discharge of sewage as per this chapter.

(c) Decommissioning permits shall expire six months from the date of issue.