Oregon Environmental Cleanup Site Information (ECSI) database

The Environmental Cleanup Site Information (ECSI) database was the electronic database the Oregon Department of Environmental Quality (DEQ) used from 1989 to 2024 to track sites with known, suspected or cleaned-up hazardous substance contamination. As of April 16, 2024 its information was migrated to Your DEQ Online, which the Environmental Cleanup program now uses to track those sites and to document sites where DEQ has determined that no further action is required.

In a Phase I ESA

This handbook pairs ASTM E1527-21's state Superfund record type with the Confirmed Release List and Inventory, which DEQ describes as subsets of this database. The database is wider than those two lists. Six details shape how to read an entry, whether it carries an old ECSI number or a Your DEQ Online project number.

• An entry is not a finding of contamination. DEQ says the appearance of a site does not necessarily mean that the site is contaminated, and that there may be contaminated sites in Oregon that are unknown to DEQ and do not appear. It calls the data "working information": some of it may be unconfirmed, outdated or incomplete, it is summary in nature, and it is subject to change at any time.
• No further action sites stay in. DEQ says the system keeps a record of sites for which it has determined no further action is necessary.
• The detail varies greatly. Each entry has basic data such as the project name and location. DEQ says most also indicate how and when the site became contaminated, the qualitative risks, the investigative and cleanup actions that have occurred and any prioritized further actions, and that many document contaminants found in soil, surface water, sediments and groundwater with concentrations and sampling dates. Entries also list past and present site operations, owners and operators.
• Most sites are industrial or commercial. DEQ adds that the Cleanup Program sometimes adds highly contaminated residential properties.
• A property can sit inside a study area. DEQ groups individual projects that may be contributing to a larger, area-wide problem into study areas. Its example is regional groundwater contamination where the sources are not known: DEQ adds projects within the region's boundaries to the study area, and these may be investigated as potential sources.
• Two systems are open for now. DEQ says it will leave the historic database available for public use during the transitionary period. Its Environmental Cleanup Program page says that database has been retired and contains stale data. The same page points to Your DEQ Online for the most up-to-date information.

What the record shows

DEQ says its Cleanup program adds a site if it meets any of these criteria:

• documented contamination that makes the site eligible for the Confirmed Release List (Oregon Revised Statute 465.405);
• a cleanup report submitted to DEQ;
• a weight of evidence that suggests contamination beyond de minimis proportions;
• an intended evaluation by Site Assessment staff that is likely to end in referral to the Voluntary Cleanup, Site Response or Orphan programs;
• a request for DEQ oversight or review through the Voluntary Cleanup Program or Independent Cleanup Pathway;
• a landfill permitted under DEQ's Solid Waste program, if contaminants that could threaten human health or the environment migrate beyond its boundaries or site issues otherwise exceed that program's authority;
• a referral from DEQ's Spill program to Site Assessment;
• a potentially contaminated site that needs a detailed or time-consuming file review to decide whether further evaluation is needed.

The last criterion means a site can be entered before anyone has decided it needs evaluation.

Where to look a site up

• The Your DEQ Online Public Records Portal. DEQ gives the cleanup search criteria as project number, project name, street name or number, submittal ID, Site ID, Environmental Interest, Submittal Type or Region, and says a search with some criteria selected can be switched to a map view. Results link to detailed reports for each site.
• The All Sites Report, a list view of all DEQ cleanup sites.
• The historic database, through the Search ECSI database link on DEQ's Environmental Cleanup Information Database page. That page also links a fact sheet on how to find environmental cleanup records.
• DEQ's Environmental Cleanup Sites page, a list of sites with their own web pages. DEQ says these are for certain sites that may have significant public interest.
• The Environmental Cleanup Program is at Cleanup.ResolutionCenter@DEQ.oregon.gov and 1-800-452-4011.

Getting the file

DEQ says Your DEQ Online reflects summaries of site information, and that for more detail on project history or activities other methods such as its public records request system may be used. 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:

• Environmental Cleanup Information Database
• Environmental Cleanup Program
• Site Assessment
• Environmental Cleanup Sites
• Your DEQ Online Public Records