Oregon
Institutional and Engineering Controls
Oregon Institutional and Engineering Controls
The Oregon Department of Environmental Quality (DEQ) says its Environmental Cleanup Section has made many no-further-action determinations that depend on institutional or engineering controls to prevent unacceptable risks. Typically the property owner accepts and maintains the controls through an agreement with DEQ called an Easement & Equitable Servitude, which DEQ shortens to E&ES.
In a Phase I ESA
ASTM E1527-21 lists state institutional and engineering control records as a standard source. The pages read name no DEQ registry of controls. This handbook pairs the record type with what DEQ does give: a search of its Your DEQ Online public records portal for projects with controls in place. The general reading of a control listing is on the State/Tribal Institutional and Engineering Control Registries page. Six Oregon details shape how to read one.
- A control means contamination was left in place. DEQ defines institutional controls as legal or administrative tools to prevent unacceptable exposures to contamination left in place at the completion of removal or remedial actions. Its common examples are restricting groundwater use and preventing residential uses of a property.
- Engineering controls are physical. DEQ's examples are fencing, capping, horizontal or vertical barriers, hydraulic controls, and the provision of clean water supplies.
- The instrument is recorded with the county. DEQ says the Easement & Equitable Servitude is registered with the county recorder and runs with the land, meaning that future owners must also abide by the controls. Look for it in the county's recorded documents as well as in DEQ's file.
- There is no separate registry on the pages read. To view projects with institutional or engineering controls in place, DEQ says to search its Your DEQ Online public records portal.
- A site with controls stays on the state lists. DEQ says that by law, sites at which it selects or approves such controls as part of a cleanup must remain on the Confirmed Release List and Inventory, even where it has made a no-further-action determination. DEQ says so in a section it describes as the listing process used for its retired cleanup database only. See the Confirmed Release List and Inventory page.
- Controls need upkeep, and the duty follows the owner. DEQ says institutional and engineering controls often require periodic inspections or maintenance to ensure they are still in place and working as designed. Of dry cleaner sites whose program cleanups were completed with controls, DEQ says they become a due care obligation of the current owner or operator. Check whether the control is still in place on the ground.
A No Further Action decision can carry conditions of its own. DEQ says they may include long-term monitoring requirements or land-use restrictions. A Prospective Purchaser Agreement is a different recorded instrument that also runs with the land.
DEQ's page links its Guidance for Use of Institutional Controls. The guidance was not read for this page.
Where to look a site up
- The Your DEQ Online public records portal, as DEQ's controls page links it. The page read does not say which field or search shows that a project has controls.
- The county recorder, for the Easement & Equitable Servitude itself.
- The Environmental Cleanup Program is at Cleanup.ResolutionCenter@DEQ.oregon.gov and 1-800-452-4011.
Getting the file
Ask for the Easement & Equitable Servitude, the no-further-action determination that depends on it, and the inspection or maintenance reports since. DEQ says that a reader who cannot find the information online should go to its public records request page. The route is described on the Your DEQ Online and public records requests page.
Sources
Oregon Department of Environmental Quality pages, read October 7, 2026, no modified date shown: