Washington Administrative Code
2023 Archive

Chapter 173-360A WAC
Last Update: 10/24/23

UNDERGROUND STORAGE TANK REGULATIONS
PDF of Chapter Digest
WAC Sections
PART 1
PURPOSE AND SCOPE
173-360A-0100Purpose of chapter.
173-360A-0110Applicability of chapter.
173-360A-0120Preemption of local programs.
173-360A-0130Approval of more stringent local requirements.
173-360A-0140Intergovernmental agreements.
173-360A-0150Definitions.
173-360A-0190Severability.
PART 2
ADMINISTRATION AND ENFORCEMENT
173-360A-0200Licensing of UST systems.
173-360A-0210Fees for UST systems.
173-360A-0220Facility compliance tags.
173-360A-0230Reporting requirements.
173-360A-0240Recordkeeping requirements.
173-360A-0250Compliance monitoring, investigation, and access.
173-360A-0260Information sharing.
173-360A-0270Enforcement.
173-360A-0280Delivery prohibition.
173-360A-0290Civil penalties.
PART 3
INSTALLATION AND PERFORMANCE STANDARDS
173-360A-0300Installation of UST systems and components.
173-360A-0310Performance standards for new UST systems and components.
173-360A-0320Upgrade requirements for existing UST systems.
173-360A-0330Upgrade requirements for previously deferred UST systems.
173-360A-0340Performance standards for partially exempt UST systems.
173-360A-0350Compatibility requirements for UST systems.
PART 4
OPERATION AND MAINTENANCE
173-360A-0400Transfer of regulated substancesOwners and operators.
173-360A-0405Transfer of regulated substancesProduct deliverers and waste oil collectors.
173-360A-0410Changes in regulated substances.
173-360A-0420Operation and maintenance walkthrough inspections.
173-360A-0430Operation and maintenance of corrosion protection.
173-360A-0440Operation and maintenance of internal linings.
173-360A-0450Operation and maintenance of containment sumps used for interstitial monitoring of piping.
173-360A-0460Operation and maintenance of spill prevention equipment.
173-360A-0470Operation and maintenance of overfill prevention equipment.
173-360A-0480Operation and maintenance of release detection equipment.
173-360A-0490Repairs of UST system components.
PART 5
OPERATOR TRAINING
173-360A-0500Purpose and applicability.
173-360A-0510Designation of Class A, Class B, and Class C operators.
173-360A-0520Timing of operator training.
173-360A-0530Requirements for operator training.
173-360A-0540Retraining requirements for Class A and Class B operators.
173-360A-0545Operation and maintenance plans.
173-360A-0550Emergency response requirements.
173-360A-0560Documentation and recordkeeping.
PART 6
RELEASE DETECTION
173-360A-0600General release detection requirements.
173-360A-0610Release detection methods for tanks.
173-360A-0615Release detection methods for piping.
173-360A-0620Inventory control.
173-360A-0625Weekly manual tank gauging.
173-360A-0630Automatic tank gauging.
173-360A-0635Tank tightness testing.
173-360A-0640Automatic line leak detectors.
173-360A-0645Monthly automatic electronic line leak detection.
173-360A-0650Line tightness testing.
173-360A-0655Interstitial monitoring.
173-360A-0660Vapor monitoring.
173-360A-0665Groundwater monitoring.
173-360A-0670Statistical inventory reconciliation.
173-360A-0675Other release detection methods.
PART 7
RELEASE REPORTING, CONFIRMATION, AND CLEANUP
173-360A-0700Reporting of suspected releases.
173-360A-0710Investigation due to off-facility impacts.
173-360A-0720Release investigation and confirmation steps.
173-360A-0730Site assessment requirements.
173-360A-0740Reporting and cleanup of spills and overfills.
173-360A-0750Reporting and cleanup of confirmed releases.
PART 8
CLOSURE
173-360A-0800Temporary closure of UST systems.
173-360A-0810Permanent closure of UST systems.
173-360A-0820Change-in-service of UST systems.
173-360A-0830Previously closed UST systems.
PART 9
SERVICE PROVIDERS
173-360A-0900Purpose and applicability.
173-360A-0910General requirements.
173-360A-0920Certifications required to perform services.
173-360A-0930Certification of service providers.
173-360A-0940Responsibilities of service providers.
PART 10
FINANCIAL RESPONSIBILITY
173-360A-1000Applicability.
173-360A-1005Definition of terms.
173-360A-1010Period of financial responsibility.
173-360A-1015Scope and amount of financial responsibility.
173-360A-1020Allowable mechanisms and combinations of mechanisms.
173-360A-1025Substitution of mechanisms by owners or operators.
173-360A-1030Termination of mechanisms by providers.
173-360A-1035Responsibilities upon bankruptcy or other incapacity of owner or operator or provider of financial assurance.
173-360A-1040Recordkeeping by owners and operators.
173-360A-1045Reporting by owners and operators.
173-360A-1050Use of standby trusts.
173-360A-1055Use of local government guarantees without standby trusts.
173-360A-1060MechanismFinancial test of self-insurance.
173-360A-1061MechanismGuarantee.
173-360A-1062MechanismInsurance and risk retention group coverage.
173-360A-1063MechanismSurety bond.
173-360A-1064MechanismLetter of credit.
173-360A-1065MechanismTrust fund.
173-360A-1066MechanismStandby trust fund.
173-360A-1067MechanismState fund or other state assurance.
173-360A-1070MechanismLocal government bond rating test.
173-360A-1071MechanismLocal government financial test.
173-360A-1072MechanismLocal government guarantee.
173-360A-1073MechanismLocal government fund.
173-360A-1080Appendix ALetter from chief financial officer.
173-360A-1081Appendix BGuarantee.
173-360A-1082Appendix CEndorsement.
173-360A-1083Appendix DCertificate of insurance.
173-360A-1084Appendix EPerformance bond.
173-360A-1085Appendix FIrrevocable standby letter of credit.
173-360A-1086Appendix GTrust agreement.
173-360A-1087Appendix HCertification of acknowledgment.
173-360A-1088Appendix ILocal government bond rating testLetter from chief financial officer of general purpose local governments.
173-360A-1089Appendix JLocal government bond rating testLetter from chief financial officer of nongeneral purpose local governments.
173-360A-1090Appendix KLocal government financial testLetter from chief financial officer.
173-360A-1091Appendix LLocal government guarantee with standby trust made by a state.
173-360A-1092Appendix MLocal government guarantee with standby trust made by a local government.
173-360A-1093Appendix NLocal government guarantee without standby trust made by a state.
173-360A-1094Appendix OLocal government guarantee without standby trust made by a local government.
173-360A-1095Appendix PLocal government fundLetter from chief financial officer.
173-360A-1096Appendix QCertification of financial responsibility.
173-360A-1097Appendix RCertification of valid claim.