DERR-2024-008858

pei.org 59
Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities
APPENDIX C-9
MECHANICAL AND ELECTRONIC LINE LEAK DETECTORS
PERFORMANCE TESTS
Facility Name:Owner:
Address:Address:
City, State, Zip Code:City, State, Zip Code:
Facility I.D. #:Phone #:
Testing Company:Phone #:Date:
This data sheet can be used to test mechanical line leak detectors (MLLD) and electronic line leak detectors (ELLD) with submersible
turbine pump (STP) systems. See PEI/RP1200 Sections 9.1 and 9.2 for test procedures.
Line Number
Product Stored
Leak Detector Manufacturer
Leak Detector Model
Type of Leak Detector MLLD
ELLD
MLLD
ELLD
MLLD
ELLD
MLLD
ELLD
MLLD
ELLD
MLLD
ELLD
MLLD (ALL PRESSURE MEASUREMENTS ARE MADE IN PSIG)
STP Full Operating Pressure
Check Valve Holding Pressure
Line Resiliency (ml) (line bleed back vol-
ume as measured from check valve hold-
ing pressure to 0 psig)
Step Through Time in Seconds (time the
MLLD hesitates at metering pressure
before going to full operating pressure
as measured from 0 psig with no leak
induced on the line)
Metering Pressure (STP pressure when
simulated leak rate 3 gph at 10 psig)
Opening Time in Seconds (the time the
MLLD opens to allow full pressure after
simulated leak is stopped)
Does the STP pressure remain at or
below the metering pressure for at least
60 seconds when the simulated leak is
induced?
Yes No Yes No Yes No Yes No Yes No Yes No
Does the leak detector reset (trip) when
the line pressure is bled off to zero psig? Yes No Yes No Yes No Yes No Yes No Yes No
Does the STP properly cycle on/off under
normal fuel system operation conditions? Yes No Yes No Yes No Yes No Yes No Yes No
A “No” answer to either of the above questions indicates the MLLD fails the test.
ELLD (ALL PRESSURE MEASUREMENTS ARE MADE IN PSIG)
STP Full Operating Pressure
How many test cycles are observed
before alarm/shutdown occurs?
Does the simulated leak cause an alarm? Yes No Yes No Yes No Yes No Yes No Yes No
A “No” answer to the above question indi-
cates the ELLD fails the test.
Does the simulated leak cause an STP
shutdown?
Yes No
NA
Yes No
NA
Yes No
NA
Yes No
NA
Yes No
NA
Yes No
NA
Test Results Pass Fail Pass Fail Pass Fail Pass Fail Pass Fail Pass Fail
Comments:
Tester’s Name (print) ___________________________________ Tester’s Signature __________________________________