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Toxics Cleanup Program


MTCA Rule Revision and MTCA/SMS Integration

MTCA/SMS Advisory Group - 
February 22 Meeting Cancelled

The preliminary topics for the March 22, 2010, meeting include:

  1. Roadmap status update on the rule revision topics that have been discussed in the workgroup to date and upcoming topics.
     
  2. Options for revising MTCA Method A Soil and Groundwater cleanup levels based on:
  • Use of New Toxicity Information to Update Cleanup Levels:   EPA has published updated toxicological parameters for many chemicals since the 2001 rule amendments.  For some chemicals, the updated toxicity information results in changes to the Method A cleanup levels.  Prior to the March 22 meeting, we will be sending you materials that summarize the new toxicity values, illustrate how that information impacts cleanup levels, and discuss some of the policy and implementation issues associated with potential rule revisions.

  • EPA Early Life Stage Guidance:  EPA updated their cancer guidelines in 2005.  One part of the EPA guidance deals with cancer risks posed by exposures that occur during early childhood.  Other states are using the EPA guidance when establishing cleanup levels.  We are now considering whether and how to apply the EPA guidance to sites in Washington.  Prior to the March 22 meeting, we will send you materials describing EPA’s guidance and information related to the scientific, policy and implementation issues associated with this topic.

  • Cleanup Levels for Lead: There has been a considerable amount of new scientific information on lead toxicity developed since the 2001 rule amendments.  We are evaluating this information to determine whether revisions to the MTCA cleanup levels are needed. Prior to the March 22 meeting, we will be sending you materials that summarize recent scientific and regulatory developments on lead and information related to rule options and implementation issues. 

  • Concurrent Pathway Exposures: We are looking at ways to simplify the cleanup rule.  One option is to combine the Standard Method B and Modified Method B into a single Method B. If we did this, we would need to decide which soil cleanup equation to use for the direct contact pathway.  Prior to the March 22 meeting, we will be sending you materials on the rulemaking options. 

  1. Implementation issues associated with revisions to the MTCA cleanup levels.
Prior to the March 22 meeting, we will send an email to committee members with an agenda and meeting materials.  These materials will also be posted to the Ecology website at this link: 
http://www.ecy.wa.gov/programs/tcp/regs/2009MTCA/AdvGrpMeetingInfo/AdvGrpMtgSchedule.html
 
If you have questions on this note or the rulemaking process, please call Dave Bradley  (360-407-6907) or Martha Hankins (360-407-6864).   Martha is currently out of the office and will return on February 16.