(1) The local health officer of a local health jurisdiction where a marine recovery area has been proposed under RCW 70A.110.040 shall develop and approve a marine recovery area on-site strategy that includes designation of marine recovery areas to guide the local health jurisdiction in developing and managing all existing on-site sewage disposal systems within marine recovery areas within its jurisdiction. The on-site strategy must be a component of the program management plan required under RCW 70A.110.030. The department may grant an extension of twelve months where a local health jurisdiction has demonstrated substantial progress toward completing its on-site strategy.

(2) An on-site strategy for a marine recovery area must specify how the local health jurisdiction will by July 1, 2012, and thereafter, find:

(a) Existing failing systems and ensure that system owners make necessary repairs; and

(b) Unknown systems and ensure that they are inspected as required to ensure that they are functioning properly, and repaired, if necessary.