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Laura FisherUST Leak PreventionCalifornia Water Resources Control Board
What States Should Expect with Secondary Containment TestingNational Tanks ConferenceSeptember 15, 2015
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Background
• California has approximately 39,000 UST systems actively storing various types of hazardous substances at over 14,000 facilities.
• Approximately 90% of UST are double‐walled systems (tank and pipe)
• 82 local implementing agencies‐ 200‐225 UST inspectors ‐ Annual UST compliance inspections ‐ Plan check installation/removals, mods‐ Operating permits‐ Enforcement
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Secondary ContainmenttTestingRegulations: 2001 ‐ Present• Frequency of Testing
‐ At installation‐ Six months after installation‐ Every three years thereafter
• Performance Standards of Test‐ Demonstrate the system performed at least as well as it did at installation
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Secondary ContainmenttTestingRegulations: 2001 ‐ Present• Test method selection procedure
‐ in accordance with the manufacturer’s guidelines
‐ if there are no such guidelines, useindustry codes/engineering standards
‐ if there are no such codes/standardsuse a test method approved by a state registered professional engineer
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Secondary ContainmenttTestingRegulations: 2001 ‐ Present
• Qualified Testers‐ State Contractors License‐ ICC Service Technician Certificate‐ Containment Manufacturer Trainingand Certification
• Testing Notification Requirements‐ 48 hour local agency notification
• Testing Submission Requirements‐ Submit testing results to local agency within 30 days
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Secondary ContainmenttTestingRegulations: 2001 ‐ Present
• Testing includes tanks, pipe, sumps, and UDC
• Vacuum, pressure, hydrostatic fluid monitoring exemption
• Required at installation, 6 months after installation, and every 3 years thereafter
• Well over 1 million secondary containment tests have occurred in the last 15 years on tanks, sumps, pipe, (and spill buckets)
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Secondary Containment Testing Survey
• To properly evaluate the effectiveness of secondary containment testing, the State Water Board UST Program staff conducted a secondary containment performance survey in 2003
• Data collected and evaluated obtained from the first round of secondary containment testing
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Secondary Containment Testing Survey
• 50% of UST systems tested had at least one secondary containment component that failed.
• The survey revealed the most common secondary containment failure to be the point at which two components are joined together.
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Survey Reported Distribution of Most Common Failure Point and Reason
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Reason for Failure• The primary reason cited for failure was accredited to improper installation.
• Material degradation was the second most common reason for failure.
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Failure Rate By Component
Tanks – Lowest Failure Rate
Piping – Second Lowest Failure Rate
Sumps & UDC – Highest Failure Rate
05
10152025303540
< 5 %
5-25
%
26-5
0%
51-7
5%
>75%
Unkno
wn
Failure Rate
# of
Par
tici
pant
s
Tanks
Piping
Sumps
UDC
Spill Containment
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Failure Rate By Component Material
Secondary Containment Component
Most Common Material Failure
Second Most Common Material Failure
Third Most Common Material Failure
Tank Jacketed Fiberglass Steel Tanks w/CathodicProtection & HDPE Tanks*
Piping Thermoplastic Flexible Piping
Thermoplastic Flexible Piping
HDPE Piping
Sump Fiberglass HDPE Unknown/Other
UDC Coated Steel Fiberglass HDPE
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Be Advised
• Installation of test boots• Repositioning test boots• Tightening clamps on test boots • Plugging test ports into test boots• Temporarily removing or disabling
monitoring sensors• Removing debris • Cleaning‐out sumps to reduce the
amount of contaminated liquid generated
• Increased Repairs/Construction
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Management of Hydrostatic Test Fluids ‐Classification
• Cleaning of spill containment prior to testing
• Test fluid will typically not become hazardous waste
• Recommended to use new test fluid
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Management of Hydrostatic Test Fluids –Reuse
• Contaminants build up in the test fluid
• Reused test fluid is not considered to be waste pursuant to U.S. EPA's "continued use" policy
• Hazardous waste generator shall determine if the test fluid is a hazardous waste
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Management of Hydrostatic Test Fluids –Leakage
• Reused test fluid leaks to the environment during a test
• Address the release
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Management of Hydrostatic Test Fluids –Disposal/Transportation
• Reused test fluid is hazardous waste
• Managed in accordance with all applicable requirement
• Uniform Hazardous Waste Manifest
• Use a registered hazardous waste transporter
• Dispose at a permitted hazardous waste facility or to another location authorized to accept the waste
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Test Boots and PortsAcceptable Positions
Test boots located in sumps (other than UDCs) must either:
• Pulled back and off; or • Test boot’s port oriented in a downward position (located between the three and nine o’clock positions), uncapped, and with the valve stem capable of allowing for drainage so that a leak from the product piping can be detected.
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Test Boots and PortsAcceptable Positions
Connected UDCs, both test boots must either: • Pulled back and off; or • Test boot’s port oriented in a downward position (located
between the three and nine o’clock positions), uncapped, and with the valve stem capable of allowing for drainage so that a leak from the product piping can be detected.
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Test Boots and PortsAcceptable Positions
Stand alone UDCs:• Position of test boots and/or reducer
fittings in the UDC (on or off) does not cause a significant delay in leak detection or substantially increase the risk of a release to the environment but does incur an unnecessary cost to compliance.
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Considerations for Upcoming Rulemaking
• Licensing/Certifications• Notifications/testing submittals• Sensor relocation• Boot and Fitting Port Position• How to handle system modifications
• Pre‐Testing
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Laura S FisherCalifornia Underground Storage Tank [email protected]