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Toxics Cleanup Program


Closed Rulemaking

Chapter 173-340 WAC, Model Toxics Control Act Regulations


The rule was originally adopted in two phases:

  • April 3, 1990 (WSR 90-08-086)
  • Documents (Please click on the "+" or "-" signs to expand or collapse the subject.)

    This created Sections 100 through 600 of the MTCA rule.

The rule was subsequently amended on:

  • January 26, 1996 (WSR 96-04-010)
  • Documents

    These amendments were made in response to a bill passed in the 1994 legislative session addressing use of agreed orders and authorizing Ecology to adopt cleanup standards for industrial properties. Issues addressed in this rule-making included:

Ecology suspended rulemaking in December 2010.

Chapter 173-204 WAC, Sediment Management Standards


The rule was originally adopted on March 27, 1991 (WSR 91-08-019).

The rule was subsequently amended on:

Chapter 173-322 WAC, Remedial Action Grants


The rule was originally adopted on May 1, 1990 (WSR 90-10-057).

The rule was subsequently amended by Ecology on:

Chapter 173-360 WAC, Underground Storage Tanks Regulations


The rule was originally adopted on November 28, 1990 (WSR 90-24-017).

The rule was subsequently amended on:


This page last updated August 12, 2016