Issue Date: November 22, 1995
Revision Date: November 6, 1997
Precision Tank Testing System (APTT System) R-2
VOLUMETRIC TANK TIGHTNESS TEST
||Leak rate of 0.1
gph with PD = 99% and PFA = 1%.
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 10
hours, 30 minutes between delivery and testing.
Minimum of 2 hours, 30 minutes between "topping off" and
There must be no dispensing or delivery during waiting time.
||Minimum of 1
Test data are acquired and recorded manually for level measurement and by
system's computer for temperature measurement.
Leak rate is calculated from last 1 hour of test period data.
There must be no dispensing or delivery during test.
product is determined by a minimum of 10 thermistors.
presence must be determined to a depth of 5 feet below grade in tank
Product level must be a minimum of 5 feet 6 inches above grade to ensure a
minimum net pressure of 1 psi at bottom of tank during test.
level sensors must be checked annually and, if necessary, calibrated in
accordance with manufacturer's instructions.
using manifolded tank systems.
Manufacturer’s Previously Listed Contact Information is No