WA State Dept of Ecology 9/18/2023

Joel Haack January 6, 2023 Page 5 Post-Cleanup Controls and Monitoring Post-cleanup controls and monitoring are remedial actions performed to ensure compliance with cleanup standards. Ecology is issuing this No Further Action opinion based on the continued performance and effectiveness of the following post-cleanup remedial actions at the Property. Ecology may rescind this opinion if these remedial actions are not performed or are not effective in maintaining cleanup standards. Compliance with institutional controls Institutional controls prohibit or limit activities that may interfere with the integrity of engineered controls or result in exposure to contamination. The following site-specific institutional controls were recorded at the LMGC Site: • Environmental Covenant 200812050469, recorded 12/5/2008. To implement the controls, an environmental covenant was recorded on the following parcels of real property in Snohomish County: • 29050800200300 • 29050800300100 • 00438610400600 (Property) • 29051700201700 Ecology approved the recorded environmental covenant, but was not a signatory on the covenant itself(see Enclosure A). Based on Ecology's analysis of your cleanup,the Environmental Covenant recorded for the LMGC Site is no longer needed at the Property. Ecology will work with you to record an amendment to the existing Environmental Covenant which releases the Property from the restrictions of the covenant. Following the issuance of this letter, Ecology will follow the general procedure in Toxics Cleanup Program Procedure 440C: Releasing Environmental Covenants Under the Model Toxics Control Act6, revised December 2016. Since the existing environmental covenant will remain in place and an amendment be recorded to release the Property from its requirements,the exact steps of the Procedure may differ. https://apps.ecology.wa.gov/publications/SummaryPages/1509057.html