Yolo County Environmental Health Office maintains files for

• each permitted underground storage tank
• tanks closed under permit
• leaky underground tank sites
• each facility required to submit hazardous waste unit
• site specific treatment
• disposal permit notifications
• every site known to the county where a cleanup or investigation of hazardous wastes is or has occurred under federal, state, or local oversight.
• each facility required to obtain a permit from Environmental Health, such as restaurants and public pools.

All of these files may be reviewed by the public in-office or online except when formal county prosecution for violations of law is in progress or pending.

To schedule an appointment for an in-office review, please email your request to environmental.health@yolocounty.org. Please note, the majority of our files have been scanned and are accessible online.

View Instructions for Electronic File Review

Search for File using ONBASE

Yolo County Environmental Health is currently in the process of transferring all of our paper files to an electronic format. Many of our files including those regarding leaky underground storage tank sites have already been transferred and are currently available in ONBASE. We anticipate that those files not already converted will all be available in the short future. However, please browse through ONBASE before making an appointment with the Environmental Health Department.

1. Reviewers shall be polite to staff and other reviewers at all times.
2. Files shall be returned in the same condition and order received.
   • We attempt to arrange contents of files in chronological order from the oldest to the most recent. Some cases have two or more files, where each case is numbered, and each file for each case is labeled with the case number followed by a letter.
     EXAMPLE: Case number 101 may include 101A, 101B and 101C.
3. No document within a file shall be removed from the office, nor shall any comments or marks be made on any document within the file.
   • If you would like to add materials to a file, it must be given to a Hazardous Materials Specialist for review and approval. Do not place any material directly into a file.
4. When a copy of file contents is requested, use Post-It Notes (available from clerical staff) to identify the pages to be copied.
   • If the document is multi-page and every page needs to be copied, place only one Post-it Note stating “all” on the note. If only selected pages need to be copied, either post a Post-it on each page that needs to be copied or indicate the page numbers on the Post-It Note. However, there will be a surcharge for each copy made by an county staff. (See In-office Copy Fees for more details)

All files are free to review. However, fees are only applied when county staff member(s) are asked to make copies or create a file by the reviewer.

• If hard copies are needed, the copies will be charged at the current per page fee rate.
• For the convenience of the public, files can be placed on a USB flash drive. The flash drive will contain the entire file plus necessary “viewers” to open the files on a personal computer outside of the Yolo County Environmental Health office. The cost of a USB flash drive will be charged at our current hourly rate for time spent preparing and creating the file.