Protecting Public Health and the Environment.

UST Installation and Closure


Whether you are installing a new tank to an existing system, replacing piping to accommodate a new dispenser, or building a new UST system, there are many regulatory factors to consider. How does the new equipment affect the current regulatory requirements in your jurisdiction? Does the installer have knowledge of, and experience with, DEQ installation testing procedures, industry standards, and OSHA regulations (29 CFR Part 1910 and Part 1926)? In Idaho, installation must be performed by a trained professional certified to install that specific equipment by the UST equipment manufacturer. A series of inspections and testing must take place prior to bringing the UST system into service, and specific installation documents must be submitted to DEQ within 30 days of the system being placed into service. It is the responsibility of the UST owner to meet all rule requirements no matter what installer is used on the project.

Prior to installing an UST system, complete and submit a Notification Form at least 30 days in advance of installation. Be sure to contact DEQ 48 hours prior to the tank and piping install, to schedule a site visit during the installation.

Temporary Closure—Temporary Out of Use (TOU)

When a tank system is temporarily closed for 3 months or more, owners and operators must comply with the following requirements:

  • Maintain insurance for proof of financial responsibility.
  • Maintain designated Class A/B operators.
  • Pump tank out to less than 1 inch of product in the UST system—including piping (have pump-out documentation available for DEQ inspection).
  • Maintain release detection and records on both tanks and piping if more than 1 inch of product remains in the tank.
  • Maintain corrosion protection (if steel tanks and/or piping).
  • Leave vent lines open and functioning.
  • Cap and secure all lines, pumps, manways, and other equipment (this includes placing a padlock on the fill pipe).
  • Immediately restart all compliance procedures when/if product is returned to the UST system.

Permanent Closure (Decommissioning)

The rules require that during permanent closure of regulated tanks, owners of the tanks need to evaluate for the presence of a release where contamination is most likely to be present. Because of the inherent dangers in handling tanks (explosive vapors and potentially hazardous petroleum residuals), it is recommended that only qualified and experienced personnel close UST systems. Knowledge of and experience with DEQ and EPA sampling procedures, industry standards, and OSHA regulations (29 CFR Part 1910 and Part 1926) are essential. Fatalities have resulted from mistakes made during tank closures. In addition, improper handling of the material in the USTs and piping can result in releases that require costly cleanups.

Prior to closing an UST system, complete and submit a Closure Notification Form 30 days in advance of site work. Be sure to contact DEQ 48 hours prior to the tank removal or closure in place, to schedule a site visit during the tank removal and sampling.

Staff Contacts

UST Specialist
Mark Olsen
DEQ State Office
Waste Management & Remediation Division
1410 N. Hilton
Boise, ID 83706
(208) 373-0138

UST Program Specialist
Christopher Bowe
DEQ Boise Regional Office
1445 N. Orchard St.
Boise, ID 83706
(208) 373-0550

Remediation & UST Specialist
Marc Kalbaugh
DEQ Coeur d'Alene Regional Office
2110 Ironwood Parkway
Coeur d'Alene, ID 83814
(208) 666-4617

Remediation & Waste Analyst
Michael Summers
DEQ Idaho Falls Regional Office
900 N. Skyline Drive, Suite B
Idaho Falls, ID 83402
(208) 528-2650

Regional Waste and Remediation Program Manager
Dana Harper
DEQ Lewiston Regional Office
1118 "F" St.
Lewiston, ID 83501
(208) 799-4881

UST/RCRA Inspector
Julie Worth
DEQ Pocatello Regional Office
444 Hospital Way, #300
Pocatello, ID 83201
(208) 236-6160

UST/LUST Specialist
DEQ Twin Falls Regional Office
650 Addison Avenue West, Suite 110
Twin Falls, ID 83301
(208) 736-2190

Related Pages

UST Rules and Regulations

Underground Storage Tanks in Idaho

UST Installation and Closure

UST Forms

Quality Assurance Project Plans and Standard Operating Procedures