Tacoma Smelter Plume: Model Remedies Guidance gets an update

To encourage cleanup of soil contaminated by the former Asarco smelter in Tacoma, we've updated our Tacoma Smelter Plume Model Remedies Guidance. For almost 100 years, the Asarco Company operated a copper smelter in Tacoma. Air pollution from the smelter settled on the surface soil of more than 1,000 square miles of the Puget Sound basin. Arsenic, lead, and other heavy metals are still in the soil as a result of this pollution.

This guidance was created to encourage cleanup of Asarco contaminated soil during property development. It provides straightforward directions on soil sampling and cleanup of soil contaminated with arsenic and lead within the Tacoma Smelter Plume. In July, we launched a revised version of the guidance, replacing the older, 2012 version.

The guidance was written primarily for developers who build residential housing or commercial buildings. However, anyone who wants to sample and clean up their Asarco contaminated soil within the Tacoma Smelter Plume can use this guidance. The guidance streamlines the sampling and cleanup process and eliminates the need to develop separate sampling and cleanup plans. When developers use the remedies covered in this guidance to clean up their properties before building structures, Ecology is able to issue timely opinion letters stating that the cleanup meets state requirements.

Former Asarco smelter stack.

In updating the guidance, we kept the same format, updated some information and links to resources, and added a new chapter. Some of the revisions answered and clarified frequently asked questions, such as calculating the minimum number of soil and duff samples needed. The new chapter describes sampling and remediation in natural areas, such as steep slopes, wetlands and their buffers.

Please, note that the publication number has changed from 12-09-086-A to 19-09-101.

If you have questions about the revised Tacoma Smelter Plume Model Remedies Guidance, contact our Technical Assistant, Eva Barber at 360-407-7094 or Eva.Barber@ecy.wa.gov.

Some internet web browsers store the address to the older version of the guidance in a cookie. If searching for the new guidance using Google or Google Chrome, you may need to clear the existing cookies and search again.

To download the new version of the guidance, go to:

https://fortress.wa.gov/ecy/publications/SummaryPages/1909101.html or visit our Tacoma Smelter Plume Technical Assistance page.

To find out if you are within the Tacoma Smelter Plume, visit Ecology’s Dirt Alert Map.

By Crescent Calimpong, Toxics Cleanup Program

Vashon Islanders can get their soil tested at the farmer's market

Residents visiting the 2018 soilSHOP booth
at the Vashon Farmer's Market

When residents of Vashon–Maury Island visit the Vashon Farmer’s Market from 10 a.m. to 2 p.m., on Aug. 10, 2019, they can go home with more than crafts and fresh vegetables – they can also learn if they have lead and arsenic in their soil.

Public Health Seattle King County and Ecology have teamed up to offer soilSHOP – a quick, easy, and anonymous way for residents to get their soil tested. Using handheld scanners, we will test soil samples that residents bring and provide instant analysis of arsenic and lead in the soil. As an added incentive, the first 15 soil-sampling participants will also receive a complimentary 30-pound bag of King County GroCo compost.

Vashon–Maury Island, while a beautiful place to live, is located downwind from the former Asarco Smelter site in Tacoma. Because of this, many properties have heavy metal contamination from the smelter.

Instant soil testing

Testing soil using XRF scanners

Ecology and health department staff will be using X-ray fluorescence (XRF) scanning technology that returns real-time, reliable data and can detect the presence of arsenic and lead in a sample. These metals are the primary concern in the Tacoma Smelter Plume, since they can have a detrimental effect on human health and development, especially for children.

The results of the XRF scan can help educate residents and property owners about soil contamination.

Staff will be available to talk with residents about healthy actions and ways they can reduce their contact with contaminated soil. We may offer further sampling to a property.

Preparing a soil sample for testing

Vashon–Maury Island residents are encouraged to bring up to three soil samples for testing to the August 10th Vashon Farmer’s Market. Be sure to arrive before 1:30 p.m. to make sure there is enough time for testing.

To collect a sample, you should:

How to take soil samples in your yard.

1. Identify an area you would like to sample – for example, your garden, where your children play, or even where your pets frequently dig.
2. Collect and combine soil in a clean container.
• For a large area, like a backyard, collect soil from 5-10 random spots
• For a small area, like a garden patch, collect soil from 3 random spots
• In garden areas, dig 6-8 inches deep
• In play areas, dig 1-2 inches deep
3. Mix the soil well.
4. Remove pebbles, rocks, and roots, then air-dry the sample in the sun.
• Do not use flame, an oven, or a hair dryer to dry your sample.
5. Transfer 1-2 cups of mixed soil into a one-quart zip-top bag – about half full.
• Label each bag with the location the soil was taken from (garden, play area, etc.) so you can keep track.

By Marcus Humberg, Communications Specialist, Toxics Cleanup Program.

Tacoma Smelter Plume Yard Program

Work on Vashon-Maury Island moves ahead

If you live in the North end of Tacoma or the southern tip of Vashon-Maury Island, you have likely heard about the Tacoma Smelter Plume. However, if you just moved here, the following information may be new.


The former ASARCO smelter stack.



For nearly 100 years a smelter operated in the small town of Ruston. Air emissions from the smelter were carried by the wind to areas in King, Pierce and Thurston County. These air emissions contained heavy metals including arsenic and lead, which settled on surface soils. The highest levels of soil contamination are seen closest to the former smelter and decrease with distance.

 

Soil replacement work

Through our Residential Yard Sampling and Cleanup Program, we are working on 14 yards and a community-park in the southern end of Vashon-Maury Island. Work started on the first yard in early March 2019.

If you live in this neighborhood, you will likely see construction-related traffic. You may notice orange fencing, closed sidewalks, and Ecology’s Yard Program banner. The contractor usually works on a few yards at a time, which means workers may travel between yards with equipment. Construction can be noisy, and it is important to pay attention to trucks and large machinery that are coming and going. This construction will likely go through July 2019.    

Please call us if you see:

• Dust in the air from construction.
• Soil on the sidewalk or street.
• Mud or water running off the property.
• Dump trucks without covers.

 

Soil sampling

If you live on the southern end of Vashon-Maury Island it is likely that your property has already been sampled. To find out if your property has soil sampling results, go to our public database and enter your address. Soil sampling is for existing, residential properties. If you are a new homeowner, and your soil hasn’t been sampled, you can fill out an access agreement and get your yard sampled, too. Soil sampling is free and completely voluntary.

Future soil replacement

Currently, 53 properties qualify for soil replacement on Vashon-Maury Island. By the end of 2019, we will have removed and replaced soil on 35 of these properties. Unfortunately, we are not able to remove and replace soil on all the properties that qualify. Some properties have steep slopes or are located in areas we don’t work, like forests or vacant lots. And, sometimes, we are unable to coordinate with the property owner. At the end of the program, we will offer one last opportunity for residents with qualifying properties to participate in our Yard Program.
 


By the end of 2019, we will have removed and

replaced soil on 35 properties on Vashon-Maury

Island.

Soil left behind

The main objective of the Tacoma Smelter Plume project is to reduce human health risks from arsenic and lead in soils. Soil replacement is focused on the high-use areas around homes and in areas where children play. Soil contamination may remain in undeveloped and forested areas. It is important to practice healthy actions like taking shoes off at the door and washing hands after working or playing in the dirt no matter where you live within the Tacoma Smelter Plume.

 

Questions

If you have any questions about the Yard Program or construction in your neighborhood, please call our project line 360-407-7688 x 2. We are always available for questions and are happy to help you find the information you need. 

Follow our yard cleanup work:

• Follow our blog!
• Visit our webpage on the Tacoma Smelter Plume.
• Sign up for email updates on our listserv.
• Look up soil sampling or soil replacement records on our public database.

By Crescent Calimpong, Toxics Cleanup Program

 

Historical photo of the ASARCO smelter, courtesy of the Tacoma Public Library Northwest Digital Collections for historical photos.

 

New Online Map: Dirt Alert

The new map is mobile friendly, making it easy to access.

from your home computer or your phone.  

This month we launched a new online Dirt Alert map. The map focuses on the Tacoma Smelter Plume, but also covers areas in the state where soil contamination may exist from arsenic-related contamination: 

·        Everett Smelter cleanup

·        Upper Columbia River Lake Roosevelt cleanup site 

·        Five Washington counties where soil contamination may exist in former orchard lands

By putting both information and data in one place, we hope to make it easier for residents to find out about arsenic-related soil contamination and resources. The new web application replaces two older, online maps, the Arsenic in Soil Database and the Everett and Tacoma Smelter Search. 

New look- Same data

The upgrade means faster downloading times and the ability to access the map by phone. The map also visually displays soil sampling data. Within the Tacoma Smelter Plume and Everett Smelter cleanup area, the map provides access to:

·        Soil sampling maps

·        Soil replacement paperwork

For yards outside of the Everett Smelter cleanup area or Tacoma Smelter Plume Yard Program service area, the map links to our Healthy Actions webpage that teaches you how to protect yourself from arsenic and lead in dirt, and provides contacts for more information.

Questions?

If you have questions or comments about the map, please call the project line at 360-407-7688 and press 2 for Tacoma Smelter Plume. You can also email the Yard Program Outreach Coordinator at Crescent.Calimpong@ecy.wa.gov.

Get the latest updates:

·       Follow our blog!

·       Visit our webpage on the Tacoma Smelter Plume.

·       Sign up for email updates on our listserv.



The home page of Ecology's new, online map, Dirt Alert.

 

 

 

 

 

 

 

 

By Crescent Calimpong, Toxics Cleanup Program