Crownhill Elementary School, Bremerton

Our review of the Crownhill Elementary School site showed:

• Soil with contamination above state cleanup standards is protected under a cover system that follows the environmental covenant requirements.
• Groundwater at the site has arsenic above state cleanup standards
• One monitoring well has consistently had TCE above the site cleanup level

Because there are homes nearby, the potentially liable person's consultant and Ecology are preparing goundwater and soil gas monitoring plans to learn more about the TCE. The cleanup completed is still protective of human health and the environment.

We invite comments on the periodic review. We will review all comments received during the comment period. We finalize the periodic review if no significant changes are made.

Background

The Crownhill Elementary School cleanup site includes the school property, or the northern parcel, and the northern portion of the Bremerton United Methodist Church property at 1150 Marine Drive (the southern parcel).

The site was used for sand and gravel mining up to the 1930s. After excavation stopped, the pit was used as a municipal/industrial landfill in the 1930s and 1940s. The depth of fill extended from 15 to 40 feet below the ground surface. The landfill caused the site to be contaminated with various hazardous substances. B

Bremerton School District acquired the northern parcel from Kitsap County in 1954. They completed construction of the current school building in 1996.

Cleanup actions were completed under a 2015 Agreed Order, which included removal and capping of contaminated soil, operation of the School HVAC system during building occupation, monitoring of groundwater and soil gas, removal of petroleum free product from monitoring wells, and placing restrictions on the property through environmental covenants (institutional controls) to protect the remedy. A periodic review is conducted every five years to evaluate the effectiveness of the cleanup and confirm that it is still protective of human health and the environment.