Sundberg Gravel Pit

The site is about 51 acres located on the east side of Cooper Point Road between 20th Ave NW and 28th Ave NW. The site was an old gravel mine. Material was brought to the site after mining ended. Some areas were filled with soil, construction and woody debris, and large logs. Petroleum may have entered the soil from leaks or burial. Other toxic material may have been buried or dumped at the site.

In 1993, a 12,000-gallon diesel underground storage tank was removed. Petroleum-contaminated soil found near the tank may have been from spills or overfilling. Petroleum-contaminated soil was stored on-site, but it is unknown whether the contaminated soil was treated or removed for disposal. 

A 500-gallon above ground storage tank found on the site did not have secondary containment to capture any potential spills or leaks. Several 55-gallon drums were found in a garage and parking area. Stained surface soil near the drums was not tested to determine if it contained hazardous material. 

Based on petroleum-contaminated soil at the site, we added it to the Contaminated Sites List in 2020. The list contains all sites waiting for investigation or cleanup, or undergoing cleanup. 

There are several areas that are wetlands at the site. Improper handling of stormwater could cause movement of contaminated stormwater into wetlands and nearby creeks.

Work under the Agreed Order will determine the contaminants, where they are located, and propose the procedure for cleanup.