(1) The purpose of this chapter is to protect public health and the environment by establishing a comprehensive framework for statewide management of LOSS.

(2) This chapter implements chapter 70.118B RCW, Large on-site sewage disposal systems, by establishing regulations for LOSS owners, operators, design engineers, and installers; and their duties in siting, designing, constructing, installing, permitting, operating, monitoring, maintaining, and repairing LOSS to achieve sustainable long-term sewage management.