1. PRODUCT PIPE LEAK DETECTION
Annual IPECA Underground Storage Tank Management & Compliance Seminar – 2016
PRODUCT PIPE LEAK DETECTION
(including the UST regulations)
John Childes Mid-Valley Supply®
“NEW”
Good Afternoon Class –
My name is Katie, and I’ll be your entertainment for the next 30-minutes or so.
We are going to get the technical boring stuff out of the way first, followed by a pop quiz, and then some fun photos and facts.
Here we go…
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2. Suction Systems 1. Common Method 2. Safe-Suction Method
SUCTION PUMP
2. Safe-Suction Method
Suction Systems fall into 1 of 2 categories based on their configuration, as defined
by the check valve location:
For a suction system to operate properly, a check valve is required.
In a Common Suction System, the check valve is traditionally located either at the
top or bottom of the suction stub/tube.
The “Common Method” was historically the most common suction system
configuration; however, it is becoming increasingly rare, b/c this system presents
a higher potential for environmental impact and requires periodic tightness testing.
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The 2nd type of suction system is a Safe Suction System.
The check valve in this system must be located as close as practical to suction pump.
This is achieved by either installing a union check which is a check valve that is placed between the two halves of the pipe union located directly beneath the pump, or via the use of a purpose built check valve fitting.
The benefits of a safe suction system include:
Better Check Valve Access for maintenance and trouble-shooting.
Faster Breach Notification to the system operator (b/c the line drains back into the tank, increasing pump pick-up time or preventing fuel delivery all together).
Lesser regulatory requirements.
Product Pipe
Under Pump Check Valve
UST
Angle Check Valve
OR Foot Check Valve

3. SUCTION SYSTEM Leak Detection Requirements:
For COMMON SUCTION systems:
Product Pipe Tightness Test Every 3-Years OR
Monthly Monitoring Method meeting 40 CFR (c)
Interstitial Monitoring
Statistical Inventory Reconciliation
Groundwater or Vapor Monitoring
Other Method Approved by AHJ (with limitations)
If Double Walled
pipe must be double-wall and Interstitial Monitoring must be performed every 30-days.
These are the Regulatory Requirements for Suction Systems which can be found in 40 CFR Part & .44.
Depending on when the pipe was installed, periodic line testing OR a monthly method that monitors the entire tank system can be used. <CLICK>
If installed after April 11, 2016, secondary containment monitoring is required to be done and documented monthly.
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4. SUCTION SYSTEM Leak Detection Requirements:
For SAFE-SUCTION systems:
RELEASE DETECTION IS NOT REQUIRED, regardless of installation date, IF…
below-grade piping slopes so that the contents of the pipe will drain back into the tank if suction is lost;
there is only one check valve, and it is located as close as practical to the pump;
the requirements above can be readily determined or proven (by the AHJ); and
the pipe operates at less than atmospheric pressure.
For Safe Suction Systems, regardless of installation date, the piping is required to comply with all of the criteria listed here.
Although release detection on safe suction pipes is not required, if you wanted the extra assurance of testing, safe suction pipes are unavoidably tested as part of the tank when doing non-volumetric tightness testing such as a pressure-decay test.
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5. Submerged Turbine Pump
Pressurized Systems
Dispenser
Pump Head
For dispensing applications requiring higher flow rates than standard suction systems can provide, Pressurized Delivery Systems are needed.
Unlike suction systems, Pressurized Systems operate under positive pressure instead of negative pressure,
and deliver higher volumes and rates of delivery.
As such, the risk of environmental impact is greater with pressurized systems then with suction systems.
A typical pressurized system is fed by a submerged turbine pump, which is located within the UST,
and the system’s check valve is located within the Pump.
Also, a pressurized system is governed by more stringent rules,
including the need for an emergency fire/shear valve located at the dispenser,
and additional leak detection requirements.
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Shear Valve
UST
Submerged Turbine Pump
Pump Motor

6. PRESSURIZED SYSTEM Leak Detection Requirements:
If installed on or before April 11, 2016…
Must be equipped with an automatic line leak detector which must be tested annually, AND use one of the following:
Annual Line Tightness Testing
Interstitial Monitoring
Statistical Inventory Reconciliation
Groundwater or Vapor Monitoring
Other Method Approved by AHJ (with limitations)
If installed after April 11, 2016…
Must be equipped with an automatic line leak detector, which must be tested annually, AND
Must have Monthly Interstitial Monitoring
These are the Regulatory Requirements for Pressurized Systems which can be found in 40 CFR Part
Only one means of leak detection is required in addition to the use of an
Automatic Line Leak Detector (tested annually).
Vapor and Groundwater Monitoring are not recommended – they are not cost
effective and by the time you detect a leak, it is too late.
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7. More PRESSURIZED SYSTEM Leak Detection Requirements:
Federal EPA Requirements for Automatic Line Leak Detectors (LLDs):
Can detect a 3-gallon per hour leak, at a line pressure of 10-psi, within 1-hour.
When a leak is detected, LLDs must shut off the product flow, restrict the product flow, or trigger an audible or visual alarm.
Must have a Third Party Certification.
Must be tested for proper operation annually.
On the topic of Automatic Line Leak Detectors,
a listed leak detection device is required on pressurized underground product pipes,
and must meet specific requirements as per 40 CFR Part AND NFPA 30.
The whole idea here is that when a leak is sensed by the leak detector, it will limit the amount of fuel loss and alert the operator.
Compliance with these requirements is typically achieved through the installation of a mechanical or electronic leak detection device.
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8. Mechanical Pressurized Line Leak Detectors (MLLDs)
(Electronic Sump Sensor)
Red Jacket MLLD
Due to time constraints, only the more common types, manufacturers, and
configurations of leak detectors are represented in this presentation.
The photo on the left shows a Red Jacket STP within a containment
sump. The STP is equipped with a Red Jacket Mechanical Leak Detector (in
the yellow circle), and the sump is equipped with an leak detection
sensor (in the purple circle).
At this particular site, the leak detection sensor is integrated with the STP
controller to provide shut-down in the event a leak is detected,
thereby providing redundant protections.
The photo on the right depicts an FE Petro STP equipped with a an FE
Petro mechanical leak detector.
In the event either of these leak detectors becomes tripped,
they will go into a slow-flow mode, which restricts the fuel flow and thereby alerts the operator of a problem.
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FE Petro MLLD

9. Electronic Pressurized Line Leak Detectors (PLLDs)
Should be tested annually for proper detection of a leak at 3-Gallons-Per-Hour (GPH), 0.2-GPH, and 1.0-GPH.
Incon PLLD’s
V/R PLLD’s
As an alternate to a Mechanical Line Leak Detector, electronic line leak detectors are also available from various manufactures, in multiple configurations.
These work in conjunction with a controller and/or Automatic Tank Gauge System.
Some benefits associated with electronic leak detectors include:
1. Programmable line testing at 0.1, 0.2, & 3-gph leak rates (which can be
used instead of annual line leak testing by a 3rd party tester).
2. Automatically generated reports and data storage capabilities which assist with
record keeping. AND
3. Provides automatic shut-down instead of a slow-flow condition in the event
a leak is detected, which minimizes fuel loss to the environment or 2ndary
containment.
Electronic Line Leak Test Report
(Wireless PLLD)

10. Secondary Containment
Dispenser
Containment for Interstitial Monitoring of Piping:
Tank Sump, Secondary Product Pipe, and Dispenser Pan
PER 40 CFR Definitions
Secondary containment or Secondarily contained means
a release prevention and release detection system for a tank or piping.
This system has an inner and outer barrier with an interstitial space that is monitored for leaks.
This term includes containment sumps when used for interstitial monitoring of piping.
Containment Sump means a liquid-tight container that protects the environment by containing leaks and spills of regulated substances from piping, dispensers, pumps and related components in the containment area.
Containment sumps may be single walled or secondarily contained
and located at the tank top, underneath the dispenser, or at other points in the piping run (such as a transition sump).
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Liquid Sensor
Liquid Sensor
Sump and Dispenser Pan can be single wall, or double wall with a monitor-able interstice.
UST

11. Leak Detection for SECONDARY CONTAINMENT / INTERSTICES:
NEW
Leak Detection for SECONDARY CONTAINMENT / INTERSTICES:
Requirements for containment sumps used for interstitial monitoring of piping:
If double-walled, the integrity of both walls must be monitored monthly (as part of “walkthrough inspections”). OR
The containment must be tightness tested every 3-years, using pressure-decay or hydrostatic method, in accordance with the manufacturer, a nationally recognized industry standard (i.e., PEI’s RP1200), or other method determined by the implementing agency.
As per 40 CFR Part , these are the regulatory requirements for the operation and maintenance of secondary containment.
Petroleum Equipment Institute Publication RP1200 is a “Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities”
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12. Leak Detection for SECONDARY CONTAINMENT / INTERSTICES:
NEW
Leak Detection for SECONDARY CONTAINMENT / INTERSTICES:
As per 40 CFR Part (b)…
(1) For UST systems in use on or before October 13, 2015, the initial spill prevention equipment test, containment sump test and overfill prevention equipment inspection must be conducted not later than October 13, 2018.
(2) For UST systems brought into use after October 13, 2015, these requirements apply at installation.
The content of this slide is a direct quote from the code book.
This deadline will apply to the majority of the UST systems out there, and the closer we get to it,
the less availability service providers will have.
So don’t wait until the last minute.
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13. POP QUIZ! What kind of system is it, and what is required?
Common Suction Method
Safe-Suction Method
Pressurized
PUMP
UST
PUMP
UST
PUMP
UST
<CLICK>S
No Leak Detection
Required for the
Product Piping
Annual LD Test AND
Annual Line PTT, OR
Interstice Monitoring, OR
Stat. Inv. Reconciliation
Line PTT Every 3-yrs, OR
Interstitial Monitoring, OR
Stat. Inv. Reconciliation

14. POP QUIZ!... (last question)
What kind of system is it, and what is required?
Supply Pipe = SUCTION/SIPHON
Return Pipe = PRESSURE/GRAVITY
Return = Annual Test
AND
Supply = Test Every 3-yrs OR
Monthly SIR (or Interstitial Monitoring if double-wall)
UST
EMERGENCY POWER GENERATOR
Per 40 CFR
(ii) UST systems that store fuel solely for use by emergency power generators installed on or before October 13, 2015 must meet the subpart D requirements on or before October 13, 2018.
(iii) UST systems that store fuel solely for use by emergency power generators installed after October 13, 2015 must meet all applicable requirements of this part at installation.
Just a side note, an Anti-siphon valve would also be a really good thing to have in this configuration.
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ATTENTION!!
Leak Detection is no longer deferred for Emergency Power Generator Systems as of October 13, 2018
PUMP
SOLENOID VALVES

15. RECORD KEEPING & REPORTING:
As per 40 CFR Part (c)…
(1) All records of testing or inspection must be maintained for three years; and
(2) For spill prevention equipment and containment sumps used for interstitial monitoring of piping not tested every three years, documentation showing that the prevention equipment is double walled and the integrity of both walls is periodically monitored must be maintained for as long as the equipment is periodically monitored.
40 CFR and …
Describes proper response to interstitial/secondary containment alarms and suspected release reporting.
This is also a direct quote out of the regulations.
Maintain your records for a minimum of 3-years. Although if you have the space, we recommend to our customers that they strive for 5 to 7-years of documentation.
Note that suspected or confirmed releases can be in the form of spills or overfills in excess of 25-gallons, observed contamination in soils or water, unusual operating conditions (i.e. sudden product loss or water gain), sudden level changes in leak detection fluid levels, failing leak test results, etc.
These are to be reported to the EPD within 24-hours of discovery. There are some exceptions which can be found in the referenced codes.
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16. What is wrong with these pictures?
These are all things that negatively impact the ability to perform leak detection… <CLICK>
<CLICK> The boot in the red square is torn, rendering it useless for testing the secondary containment piping. Also, there is so little clearance between the end of the containment piping and the first fitting on the product pipe, that the boot cannot be properly pulled back when not in use.
<CLICK> The boot in the red circle is encumbered and stressed by the product line that was installed up against it.
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17. What is wrong with these pictures?
These are all things that negatively impact the ability to perform leak detection…
The STP in the red square is completely buried. There are areas of an STP that can release product without tripping a leak detector. With the soils covering the STP, visual inspection is limited. Additionally, the soils can accelerate corrosion and encumber service activities.
The red circle shows two, double wall product pipes. They are inadequately protected from physical damage, and the fiberglass outer pipe is also inadequately protected damaging ultra violet rays, which are causing the fiberglass to delaminate.
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18. What is wrong with this picture?
The leak detection sensor is where is should be and in a holder to maintain proper orientation.
The sump looks tight and basically dry.
Test boots are un-clamped to allow liquids to enter the sump.
I don’t see any tell-tale signs of leakage, and the pipes are labeled supply and return.
There is a little bit of liquid near the sensor that could be removed.
This is a suction system, which would have been considered a safe suction, except for the sections of flexible fuel lines that are too long. As such, they rise, almost to the top of the sump, creating a high spot in the line and trapping fuel. This is no longer a “safe suction” system.

19. ???
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Any Questions??
Any Questions??
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