Issue Date: June 19, 1996
Revision Date: May 25, 2001
OEL 8000, K-OEL
(MTG - XX Magnetostrictive Probe, 4 inch dia Floats)
AUTOMATIC TANK GAUGING METHOD
||Leak rate of 0.1
gph with PD = 97.8% and PFA = 2.2%.
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
Tanks less than 95% full may be tested.
Minimum product level required is based on tank diameter as follows:
48" dia/ min 12";
64" dia/ min 15";
72" dia/ min 16";
96" dia/ min 20";
126" dia/ min 25";
132" dia/ min 26".
For other tank diameters, consult manufacturer.
||Minimum of 6
hours, 30 minutes between delivery and testing.
There must be no delivery during waiting time.
||Minimum of 4
Test data are acquired and recorded by the controller.
Leak rate is calculated from data determined to be valid by statistical
There must be no dispensing or delivery during test.
product is determined by a probe containing a minimum of 5 thermistors.
At least one thermistor must be submerged in product during test.
||Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.055 inch.
Minimum detectable change in water level is 0.011 inch.
||Probe must be
checked and, if necessary, calibrated in accordance with manufacturer's
using manifolded tank systems. Therefore, this certification is only
applicable when there is a probe used in each tank and the siphon is broken
Tests only portion of tank containing product.
As product level is
lowered, leak rate in a leaking tank decreases (due to lower head
Consistent testing at low levels could allow a leak to remain undetected.
EPA leak detection regulations require testing of the portion of the tank
system which routinely contains product.
Ken Wilcox Associates
1993 Pond Rd.
of Evaluation: 01/17/96,
Tel: (631) 981-2001