The proposed rule incorporates changes reviewed and recommended by the Technical Review and Advisory Panel for onsite sewage treatment and disposal systems. The proposals address existing system tank inspection procedures; operating permits; filters and components; land application of septage; drainfield repairs; portable restrooms; design, construction location and use of septic tanks, dosing systems, drip irrigation systems, performance-based treatment systems, aerobic treatment systems and mound drainfield systems; system abandonment; site evaluations; reports required; and availability of forms.