|
Certification |
Calculated minimum detectable leak rate of 0.1 gph
with PD > 95% and PFA < 5%. |
|
Leak Threshold |
Calculated leak threshold is 0.055 gph with PD = 95% and PFA = 5%.
A tank system
should not be declared tight if the test result indicates a loss or gain
that equals or exceeds this threshold. |
|
Applicability |
Gasoline, diesel, aviation fuel, fuel oil #4. |
|
Tank Capacity |
Maximum size of tank = 76,500
gallons. |
|
Waiting Time |
Minimum of 1.5 hours after delivery or dispensing.
Waiting times during evaluation ranged from 20 minutes to 1.5
hours. |
|
Test Period |
Minimum of 13 hours.
There must be no dispensing or delivery during test. |
|
Temperature |
Measurement not required by this system. |
|
Groundwater |
Tank may not be tested unless the
groundwater level is known to be below the tank bottom. |
| Calibration |
Differential pressure sensor must be
checked regularly in accordance with manufacturer's instructions. |
|
Comments |
This method was
not evaluated with groundwater taken into account. Test results are
not valid when it is not demonstrated that the groundwater level is below
the bottom of the tank during the test.
Tests only portion
of tank containing product.
The tank must be
at least 90% full.
Evaluated in a
nominal 51,000 gallon, horizontal cylindrical steel tank with a diameter of
13 feet and a length of 54 feet containing JP-5 jet fuel. |
