Owners and operators of
regulated underground
storage tanks (USTs) on tribal
lands must comply with the
federal UST regulation.
This compliance assistance
brochure highlights
tips to help you manage your
piping release detection.
Note: This document is a
resource to promote
compliance and does not
replace the federal UST
regulation.
This brochure is one in a
series of EPA compliance
assistance brochures
designed to help owners and
operators in Indian country
comply with the federal UST
regulation.
Other brochures focus on
implementation, compatibility,
spill buckets, overfill
protection, recordkeeping and
notification, financial
responsibility, insurance, and
tank release detection.
P


Inspect
oEPA
Office of Underground Storage Tanks
www.epa.gov/ust
July 2018
EPA-510-F-18-001
Compliance Assistance In
Indian Country

-------
RELEASE DETECTION
Piping elease detection is a method or combination
of methods designed to heip quickly detect releases
from underground piping.
What type of release detection must
you use?
A line leak detector must be installed on your pres-
surized piping and must be tested annually.
Also, if your pressurized piping was installed or
replaced on or before April 11, 2016, you must use
one of the following release detection methods:
* Annual tightness test
^ Monthly monitoring using either
*	Interstitial monitoring for
double-walled piping
*	Continuous in-tank leak
detection
*	Vapor monitoring
*	Groundwater monitoring
*	Statistical inventory
reconciliation
^ Other methods approved by the
implementing agency
If your pressurized piping was installed or replaced
after April 11, 2016, your system must be
secondarily contained and you must use interstitial
monitoring. .
What type of release detection can
you use for suction piping?
Release detection is not required if the
suction piping:
Operates at below atmospheric
pressure
f Sloped so its contents drain back
into the tank, and
^ Only one check valve directly
below the dispenser pump
If your suction piping does not exactly match the
characteristics above, you must use one of the
monthly methods used for pressurized piping, or
conduct a tightness test at least once every three
years.
If you use vapor
monitoring or
groundwater
monitoring, you
must keep
records of a site
assessment
showing that
the monitoring
system is set up
properly.
Suction piping system
What should you do to ensure your
release detection device is working
properly? If you use a:
Control panel
*** Check your printout
* What does the printout show? Is the
system working properly or are there
problems that need to be addressed?
MUM DD, YYYY HK:MM XM
Q 1:UNLEADED REG LINE
3.0 GAL/HR RESULTS:
xm| pass ]
NUMBER OP TESTS PASSEI
PREV 24 HOURS : 12j
SINCE MIDNIGHT : 81
0.20 GAL/HR RESULTS:
0.10 GAL/HR RESULTS:
Piping leak test results
ALARM HISTORY REPORT
— SENSOR hLhRH —
L1:DISP 12
DISPSUMP
|FUEL ALARM |
JUL 'Hi, W 10112 PH
I FUEL Ml I
S? 20. 2005 8:27 PH
Ifiifi urn I
FI8 21. 2005 5:03 PM
LIQUID STATUS
MUM DD, YYYY HH;W XM
L 1 : UNLEAD2D WJNULAR
P50B tPRHLI
L 2 : S'uPtH MM
ISENSOR KORMALI
Sump sensor alarm history
Sump sensor status report
Immediately respond to and investigate any con-
trol panel alarms or flashing lights.
Make sure alarms function properly.
Releases may go undetected if you
ignore or disable the alarms.
Containment sump
Check your sump
*	Is a sensor present?
*	Is the sensor positioned
correctly?
*	Is there any liquid or
product present?
*	Does the lid have a tight
seal and is it securely
fastened?
*	Is the sump damaged?
A damaged sump will not
hold product if a
release occurs.
/
Control panel indicator lights
Tank top sump with double-
walled piping and liquid
sensor
Containment sumps that are part of the
piping Interstitial monitoring system must
be tested at least once every three years
for liquid tightness.
Tank top sump full of liquid
How do you avoid common piping
release detection problems?
Line leak detectors (LLD)
«*" Make sure the LLD is installed or functions
correctly
Test annually with simulated leak at three gallons
per hour at 10 psi line pressure
w Make sure the LLD is programmed or properly
connected
Submersible turbine pump
without a LLD installed
Electronic LLD
Mechanical LLD
Sensors
w Make sure sensors are present and functioning
^ Make sure sensors are properly installed and test
annually
Tank top sump sensor installed too high
Moved sensor cannot detect liquid
Tightness Testing
Test every three years including suction systems
that do not meet the exemption requirements
Conduct an annual line test for pressurized piping
Recordkeeping
w Keep records of annual tightness tests
Keep records of annual release detection
equipment tests for LLD and sensors
«*" Keep release detection performance claims or
repair and maintenance records
*" Keep records of the 30-day visual equipment
inspection or annual walkthrough inspection
Keep site assessment records for vapor and
groundwater monitoring
For more information on piping release
detection, see EPA's Release Detection For Underground
Storage Tanks and Piping: Straight Talk on Tanks or
order free copies by calling (800) 490-9198.

-------