Storage Tanks

"BECQ-DEQ's Storage Tanks Program is responsible for reviewing and issuing permit to install and operate both aboveground and underground storage tanks. It is also responsible for performing inspections, compliance monitoring and enforcement of regulations."


Robert B. Deleon Guerrero, Manager

Jacob T. Lizama, Environmental Specialist

Jason Q. Reyes, Environmental Technician



Aboveground Storage Tank (AST) system with
Secondary Containment berm

Aboveground Storage Tanks (AST) Program: An "Aboveground Storage Tank" or ‘AST’ means any tank or combination of tanks that is used to contain regulated substances and is not an underground storage tank. An AST system is any aboveground storage tank, connected piping, ancillary equipment, and spill containment system. Leak detections for ASTs must be performed by a certified tank installer.



 CNMI Aboveground Storage Tank (AST) Regulations

SPCC Rule: Qualified Facility Applicability via USEPA

Underground Storage Tank (UST) systems

Underground Storage Tanks (UST) Program: An Underground Storage Tank or 'UST' means a tank or any underground piping connected to the tank that has at least 10% or more of its combined volume underground (or beneath ground surface). USTs store petroleum such as diesel or gas and or other regulated substances. UST Diagrams and Drawings. DEQ routinely conducts UST inspection of facilities that operate in the CNMI. We also provide assistance to the USEPA inspectors with follow up site inspection for compliance with their enforcement actions in the CNMI. The US EPA and DEQ conduct follow up site inspection on a semi annual schedule during USEPA’s program review or evaluation of the UST Program. Also, USEPA conduct their inspection and issues enforcement action or citation to facilities that are non-compliance and/or violates the federal UST Regulations. 


CNMI Underground Storage Tank (UST) Regulations: 

In 2019, the Storage Tanks program/staff merged with the Site Assessment & Remediation program, and is now known as the "Storage Tanks, Site Assessment & Remediation" (ST/AR) Branch.

For any information regarding Underground Storage Tanks (USTs) and Aboveground Storage Tanks (AST), please contact the Storage Tanks team (Jacob Lizama, Jason Reyes) at 664-8511 or (Robert DLG) at 664-8506.

For information regarding the Site Assessment & Remediation program, visit the "Site Assessment & Remediation" page.

Storage Tanks, Site Assessment & Remediation (ST/AR)

Last Updated 1/20/2021

SPCC and AST Installation Considerations

Installation Setbacks & SPCC applicability

Information to consider before installing AST and how to determine when an SPCC is applicable to your facility...more