||Leak rate of 0.1
gph with PD = 99.86% and PFA = 0.14%.
A tank system should not be declared tight if the test result indicates a
loss or gain that equals or exceeds this threshold.
aviation fuel, fuel oil #4.
||Maximum of 15,000
Tank must be minimum 100% full.
||Minimum of 6
hours between delivery and testing.
Minimum of 1 hour between "topping off" and testing.
There must be no dispensing or delivery during waiting time.
||Minimum of 1
Test data are acquired and recorded manually and by system's
Leak rate is calculated from average of the last 10 consecutive 6 minute
There must be no dispensing or delivery during test.
product is determined by a minimum of 10 temperature sensors.
groundwater in tank excavation backfill must be determined.
If groundwater is above bottom of tank, product level must be adjusted to
provide net pressure of 2-4 psi at bottom of tank during test.
sensors must be checked annually and calibrated annually in accordance
with manufacturer's instructions.
using manifolded tank systems.