||Leak rate of 0.05 gph with PD = 99.2310% and PFA =
A tank system should not be declared tight
if the test result indicates a loss or gain that equals or exceeds this
||Gasoline, diesel, aviation fuel, fuel oil #4.
||Maximum of 6,000 gallons. Tank must be minimum 100% full.
||Minimum of 36 hours between delivery and testing.
of 1.5 hours between "topping off" and testing.
waiting time is 36 hours.
There must be no dispensing or delivery during
||Minimum of 1 hour, 48 minutes.
Volume data is collected
and recorded by a computer.
Leak rate is calculated from 1 minute of test.
There must be a minimum of 10 tests performed to conclusively declare a
tank tight or declare a leak.
There must be no dispensing or delivery
||Average for product is determined by a resistance
||Depth to groundwater in tank excavation backfill must be
If groundwater is above bottom of tank, product level must be
adjusted to provide a height difference of 6 feet between product and
||Level sensors must be calibrated before each test.
Temperature sensor must be checked and, if necessary, calibrated in
accordance with manufacturer's instructions.
||Not evaluated using manifolded tank system.