WSR 06-18-101



[ Order 06-11 -- Filed September 6, 2006, 10:17 a.m. ]

Subject of Possible Rule Making: This rule making proposes to adopt requirements for mercury emissions from coal-fired power plants into chapters 173-406 and 173-400 WAC. A new federal rule establishes a national cap on mercury emissions and gives each state a mercury budget. States may adopt the federal rules or they may adopt rules that are more stringent. The rule making will determine Washington state requirements in place of the federal rule, opt out of mercury trading and establish emission standards through a phased approach. This rule making will develop a methodology to distribute mercury emission credits in Washington state. This rule may also adopt by reference requirements for new coal-fired electrical generating units under the NSPS program, with adoption of more stringent requirements being evaluated.

This action will also change the name of chapter 173-406 WAC from the acid rain rule to the electric generating unit rule, and replace the current requirements for the acid rain program with adoption by reference of the federal requirements.

Statutes Authorizing the Agency to Adopt Rules on this Subject: RCW 70.94.331, 70.94.141, 70.94.154, and 70.94.860.

Reasons Why Rules on this Subject may be Needed and What They Might Accomplish: These rules will implement the federal clean air mercury rules adopted by the Environmental Protection Agency (EPA) in May 2005. The federal rules have state air agency requirements that begin in 2006 and source specific requirements that begin in 2009. EPA's rules will apply in Washington if we fail to adopt our own by November 2006. We intend to complete the rule-making process as soon as possible, knowing that the state rules will substitute for the federal rules once EPA approves them. The Washington state rules will establish our procedure to distribute mercury emission credits to coal-fired power plants and determine when emissions trading will and will not be allowed in Washington. Establishing a stringent emission limit would be part of the mercury emissions distribution plan and will require TransAlta, currently the sole coal-fired power plant in Washington, to install controls to meet the limit.

Other Federal and State Agencies that Regulate this Subject and the Process Coordinating the Rule with These Agencies: EPA Region 10, energy facility site evaluation council (EFSEC), and the department of community, trade and economic development will be involved in this effort. They will be part of the stakeholder group assisting with the rule development effort. EFSEC has independent authority to regulate new energy facilities in Washington state. EFSEC and ecology will be working closely with each other to propose rules in tandem that represent the Washington state approach to regulating mercury emissions from existing and future coal-fired power plants.

Process for Developing New Rule: This rule making is to amend an existing rule. Amendments to the rule will be drafted and reviewed internally and by an advisory group. The public will be provided with the opportunity to comment on the proposed rule. At least one public hearing will be held. The proposed amendments will be posted on the agency web site and provided to parties that have identified themselves as interested parties.

Interested parties can participate in the decision to adopt the new rule and formulation of the proposed rule before publication by contacting Elena Guilfoil, Department of Ecology, P.O. Box 47600, Olympia, WA 98504-7600, phone (360) 407-6855, fax (360) 407-7534, e-mail, or accessing the ecology web site

August 22, 2006

S. A. Clark

Air Quality Program Manager

Washington State Code Reviser's Office