| PART 1: GENERAL PROVISIONS |
| 246-272B-01000 | Purpose and objectives. |
| 246-272B-01100 | Acronyms and definitions. |
| 246-272B-01200 | Applicability and relationship to other statutes and regulations. |
| 246-272B-01300 | General requirements. |
| PART 2: APPROVAL AND PERMITTING PROCESS |
| Subpart A - New Construction |
| 246-272B-02000 | Site review -- Predesign report, soil characterization, and site inspection. |
| 246-272B-02050 | Environmental review -- Site risk survey and hydrogeology report. |
| 246-272B-02100 | Engineering. |
| 246-272B-02150 | LOSS 14,500 gpd and below -- Operating permit application and approval to construct. |
| 246-272B-02200 | LOSS greater than 14,500 gpd -- Operating permit application. |
| 246-272B-02250 | LOSS greater than 14,500 gpd -- Public notice. |
| 246-272B-02300 | LOSS greater than 14,500 gpd -- Operating permit and approval to construct. |
| 246-272B-02350 | Construction. |
| Subpart B - First Department Operating Permit for Existing LOSS |
| 246-272B-02400 | LOSS constructed on or before July 1, 1984. |
| 246-272B-02450 | LOSS with current permit from department of ecology or local health jurisdiction. |
| 246-272B-02500 | LOSS constructed after July 1, 1984, without current operating or discharge permit. |
| Subpart C - Permitted LOSS |
| 246-272B-02550 | LOSS modifications. |
| 246-272B-02650 | Operating permit renewals. |
| 246-272B-02700 | Operating permit requirements and conditions. |
| PART 3: SITE AND ENVIRONMENTAL REVIEW REQUIREMENTS |
| Subpart A - Site Review |
| 246-272B-03000 | Site review -- Predesign report. |
| 246-272B-03100 | Site review -- Inspection. |
| Subpart B - Environmental Review |
| 246-272B-03200 | Environmental review -- Site risk survey. |
| 246-272B-03300 | Environmental review -- Hydrogeology report. |
| Subpart C - Site Standards |
| 246-272B-03400 | Soil characterization. |
| 246-272B-03500 | Minimum land area. |
| PART 4: ENGINEERING REQUIREMENTS |
| 246-272B-04000 | Engineering report. |
| 246-272B-04100 | Management plan. |
| 246-272B-04200 | Operations and maintenance manual. |
| 246-272B-04300 | Monitoring and reporting plan. |
| 246-272B-04400 | Plans and specifications. |
| PART 5: CONSTRUCTION REQUIREMENTS |
| 246-272B-05000 | Installer qualifications and responsibilities. |
| 246-272B-05100 | Construction oversight and testing. |
| 246-272B-05200 | Water tightness testing of sewage tanks. |
| 246-272B-05300 | Department final inspection. |
| 246-272B-05400 | Post-construction documentation. |
| PART 6: DESIGN AND TECHNICAL STANDARDS |
| Subpart A - General Requirements |
| 246-272B-06000 | General design requirements. |
| 246-272B-06050 | Horizontal setbacks. |
| 246-272B-06100 | Vertical separation. |
| 246-272B-06150 | Design flows. |
| 246-272B-06200 | Sewage characterization. |
| 246-272B-06250 | Treatment. |
| 246-272B-06350 | Drainfields. |
| 246-272B-06400 | Design requirements to allow monitoring and maintenance. |
| 246-272B-06450 | Sewage tanks. |
| 246-272B-06500 | Collection, conveyance, and other piping appurtenances. |
| Subpart B - Specific Technologies |
| 246-272B-06550 | Public domain and proprietary technologies. |
| 246-272B-06600 | Pressure distribution. |
| 246-272B-06650 | Subsurface drip systems. |
| 246-272B-06700 | Sand-lined trenches and beds. |
| 246-272B-06750 | Intermittent sand filters. |
| 246-272B-06800 | Recirculating gravel filters. |
| 246-272B-06850 | Cesspools and seepage pits. |
| 246-272B-06900 | Holding tank sewage systems. |
| PART 7: LOSS OPERATIONS REQUIREMENTS |
| Subpart A - Routine Operations |
| 246-272B-07000 | Management requirements. |
| 246-272B-07050 | Operations and maintenance requirements. |
| 246-272B-07100 | Department inspections. |
| 246-272B-07150 | Reliability and emergency response. |
| 246-272B-07200 | Operator qualifications and responsibilities. |
| 246-272B-07250 | Metering. |
| 246-272B-07300 | Sewage tank management. |
| Subpart B - LOSS Changes |
| 246-272B-07400 | Modifications. |
| 246-272B-07450 | Failures. |
| 246-272B-07500 | Abandonment. |
| 246-272B-07550 | Connection to a sanitary sewer system. |
| PART 8: WAIVERS, ENFORCEMENT, AND APPEALS |
| 246-272B-08000 | Waivers. |
| 246-272B-08100 | Enforcement. |
| 246-272B-08200 | Notice of decision, appeals, and adjudicative proceedings. |
| 246-272B-08300 | Third-party appeals to department permit decisions for LOSS over 14,500 gpd and adjudicative proceedings. |
| PART 9: SEVERABILITY |
| 246-272B-09000 | Severability. |