2. Repairs
Repairing tank liner or fixing a hole in the tank or spill bucket
A tank system must be repaired to prevent and detect releases due to
structural failure or corrosion
Repairs must be performed in accordance with manufacturer’s
specifications and national code of practice
Metal pipe sections and fittings cannot be repaired and must be replaced
A tank that has previously been repaired or upgraded using the interior
lining method may be repaired only if structurally sound
There are repairs that will require an Ecology Retrofit/Repair checklist
this and other forms may be found on ECY website under Publications/
Forms.
(SEE UNDERGROUND STORAGE TANK INFORMATION/CHECKLIST IN PACKET)
3. Repairs/Replacements
Tanks
– Get written documentation from manufacturers for tank
modifications
– Perform a tank tightness test after completion of repair and report
any test failures
Piping
– Perform a line tightness test after completion of repair and report any
test failures
Corrosion Protection
– Must provide protection to all metal components that contain
regulated substances.
– If the system fails an evaluation it must be repaired and tested at the
time of repair, then re-tested within 1-6 months following the repair.
Spill and Overfill
– Spill and overfill equipment must be installed to comply with
recommended practices of the UST systems
4. Installations
Installation of tanks and piping
Tanks and underground piping must be installed by ICC certified UST
vendor
Tanks and piping must be made of or lined with materials that are
compatible with the substance stored in the tank system
All tank systems installed must meet performance standards:
– Spill and overfill prevention equipment and requirements
– Corrosion protection performance standards
– Release detection performance standards
– Installation by licensed personnel
5. Secondary Containment for
Tanks and Piping
What is Secondary Containment?
A single-walled tank is the first or primary containment. Secondary is
enclosing an UST within a second wall. Leaks can be contained and
detected quickly before harming the environment.
When is Secondary Containment required?
Owners and operators shall install secondary containment and interstitial
monitoring (between the walls) for all (including petroleum) new and
replaced tanks and piping after October 1, 2012.
Owners and operators must replace entire piping run when 50 percent or
more of piping is removed and other piping is installed.
Owners and operators will install under dispenser containment for all new
dispenser systems.
6. Changing to Biodiesel
Biodiesel
Cleaner-burning replacement fuel
Made from vegetable oil
Using biodiesel in a conventional diesel engine substantially
reduces emissions of unburned hydrocarbons, carbon
monoxide, sulfates, and particulate matter
Less toxic to the environment than petroleum-based diesel
Biodegrades much faster
7. Biodiesel
If biodiesel is blended with petroleum diesel, another
petroleum product, or a hazardous substance, Washington’s
UST rule must be followed
100% biodiesel contains no petroleum-based products or
hazardous substances, therefore state UST laws do not apply
If you change a UST to 100% biodiesel notify the ECY of the change in
service, perform a site assessment by a certified assessor, once submitted the tank
status will change and tank fees will not apply