Administrative Rulemaking

Information on PLIA’s proposed rulemaking can be found on the Rules Agenda. This agenda provides status of each rulemaking proposal and includes links to anything published with the Office of the Code Reviser.

Current Rulemaking.

  • Title 374 WAC: PLIA proposed minor updates to all agency chapters. These updates reflect new citations due to the recodification of the environmental statutes under Title 70A RCW which became effective in 2020.
  • Chapter 374-50 WAC, Initial Investigations: PLIA proposed rules setting forth the requirements and processes for heating oil tank owners and operators when conducting an initial investigation.
  • Chapter 374-80 WAC, Advice and Technical Assistance Program: PLIA proposes rule updates to better reflect how the program is administered.
  • Chapter 374-90 WAC, Petroleum UST Revolving Loan and Grant Program: PLIA proposes program rules to reflect the administration of the program.

Public Comment Sessions.

As required by Chapter 34.05 RCW, Administrative Procedures Act, public participation is encouraged. PLIA provides opportunity for oral or written comment on proposed rules during scheduled public comment sessions. These sessions are open to the public.

Contact PLIA Rulemaking.

Email to

Mail to: PLIA Rules Coordinator, P.O. Box 40930, Olympia, WA 98504-0930.

For assistance you may also call us at 360-407-0515 or TTY: 711 or 800-833-6388.


PLIA is not able to accepts faxes at this time. Please email documents.