Course Description

(Course 2 of 2 in a series)
Course ID: 
Policy & Regulations
Continuing Education Units: 

(Part 2 of 2) This updated series is a real world, applied examination of Washington’s Model Toxics Control Act (WAC 173-340) covering key issues and situations that consultants and site managers deal with and argue about, with the goal of minimizing site review time and expediting site cleanup approvals. 

In this 2-day session, attendees will participate in a review and discussion of the new model remedies for petroleum-contaminated sites, followed by a presentation from a WA Ecology representative that will highlight some of what site managers are looking for, changes to the VCP enrollment process, and an opportunity for Q & A.

Day 2 will cover 3- and 4-phase models, cross media protection pathways (soil to groundwater, groundwater to surface water, and groundwater to sediment), and introduce the concepts and the new guidance documents and implementation memos recently issued by Ecology.  This leads into a discussion of empirical demonstrations.

Participants who complete this session will gain a deeper understanding the most common issues, and how to expedite compliance by working effectively with WA Ecology site managers.

*NWETC recommends attending Part one of the MTCA series: “Model Toxics Act: An Introduction” prior to attending this course.


*Reduced tuition is available to employees of Native American tribes, government agencies, nonprofits, students and NAEP, NEBC, NWAEP members. You may register online or by calling the Northwest Environmental Training Center at (425) 270-3274. Register Now!

Please wait to receive a course confirmation email, roughly one month prior to the class, before making any travel arrangements.



Attendees are encouraged to take "Introduction to the Model Toxics Control Act" to prepare for this course.

Attendees will receive a .PDF of the course manual containing workshop proceedings and reference material. A physical book may be purchased by selecting "Physical Book" when enrolling.

Intended Audience: 

This course is intended for environmental consultants, federal, state and local government staff and other professionals seeking an improved understanding of the Model Toxics Control Act.

Once your order has been placed, you are subject to our cancellation policy regardless of the status of your invoice.

  • 31 days prior to training -> 100% refund
  • 30-16 days prior to training -> 50% refund
  • 15 - start of course -> No refund available

Attendee replacement acceptable at anytime.

Course registration fees and cancellation policy are subject to change without notice.

More Information

Course Topics

Day 1 will focus on Ecology's newly introduced Model Remedies for soil and groundwater contamination, including what they are, why they were developed, and when and how they apply, before covering some of the vapor intrusion regulations that are now incorporated into site assessments and cleanup.

Day 2 will cover 3- and 4-phase models, including when and how to use them; when and how they work; demonstration vs. calibration vs. verification; and other equilibrium partitioning models used by Ecology, including groundwater to surface water and groundwater to sediment. From there, we'll move into empirical demonstrations, including soil to groundwater, groundwater to porewater, and groundwater to sediment.


What to Bring

If you will be using the PDF book, please bring a laptop/table to view it, or a printout of the material. Lunch will be on your own, but drinks and snacks will be provided throughout the day.

Billing Information

In order to guarantee a space in a course, the tuition must be paid in full TWO WEEKS before the first day of the course by either check or credit card. State and government agencies paying with a purchase order are allowed payment under the two-week time frame if a copy of the purchase order is received by NWETC.

If You Need to Cancel


  • With 31 or more days notice, we will offer a 100% refund or credit towards a future course. The credit is good for one year and may be applied to any course.
  • With 30-8 days notice, we will offer a course credit towards a future course. The credit is good for one year and may be applied to any course.
  • With fewer than 8 days notice, there is no course credit available

*Please note that attendee replacement is welcome at any time

Disability Accommodations

Disability Accommodations:

No upcoming offerings

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