New UST Regulation for Alternative Compatibility
The variance for the provisional storage of biodiesel blends up to
B20 has expired. On June 1, 2012, new permanent California
Underground Storage Tank (UST) regulations became effective to allow
the storage of all biodiesel blends, including B100, in double-walled
systems. If the manufacturer of the UST containment system and
related components does not have the required compatibility approvals
from the appropriate independent testing organizations, under the new
regulations, the owner or operator may submit a written affirmative
statement of compatibility for the specific hazardous substance from
the manufacturer(s). The written affirmative statement of
compatibility shall satisfy the requirements under CCR Title 23, Section 2631(b) and applies to all
***PLEASE BE ADVISED***
The Materials Compatibility Letters previously submitted for the
Variance Approval may not meet all of the requirements under the new regulations.
to assure UST compliance under new regulations:
- In 2015, the United States
Environmental Protection Agency modified the federal UST
regulations requiring UST system compatibility be confirmed
through an independent laboratory, or through the use of an
equipment or component manufacture compatibility approval.
In response to these modifications to the federal UST
regulations, national entities are now providing UST system
compatibility documentation online. Web sites currently
offering UST system compatibility information include the
Petroleum Equipment Institute (PEI),
and the Association of State and Territorial Solid Waste
Management Officials Fuel
Compatibility Tool web site.
- In addition, HMD requires that you determine
functionality of the leak detection equipment used to
monitor the alternative fuel stored. The leak detection
equipment must be listed in the SWRCB
LG-113 approved listings and the manufacturer must
indicate that the leak detection equipment can function with
the identified alternative fuel stored. A separate list of
acceptable biodiesel and ethanol leak detection equipment is
- Complete the Affirmative
Statement of UST Compatibility with Hazardous Substance
form and the UST Leak
Detection Functionality with Hazardous Substance form
and submit to the County of San Diego Hazardous Materials
Division if you wish to store biodiesel in your UST
system(s). Since the new regulations apply to all hazardous
substances, please also include other alternative fuels you
plan to store. The forms will be used to demonstrate
compliance for compatibility under the new regulations.
Once HMD has determined that the UST system storing the
alternative fuel(s) has met all the requirements of the new
regulations for compatibility and leak detection
functionality, a new UST Operating Permit will be issued.
If you cannot provide any documentation that supports your
UST system as having approved compatibility and leak detection
equipment functionality, HMD will require the alternative fuel
to be removed from the UST system immediately.
have any questions, please contact Cecilia
Lewallen at: (619) 454-9915 or Veronica
Archer at: (619) 454-9672.