Chapter 246-272B WAC

Last Update: 5/26/11

LARGE ON-SITE SEWAGE SYSTEM REGULATIONS

WAC Sections

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