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Issue Date: November 22, 1995
Revision Date: March 16, 1998
Egemin
Naamloze Vennootschap
E'SPI III
(Mass Buoyancy Probe)
AUTOMATIC TANK GAUGING METHOD
| Certification |
Leak rate of 0.2
gph with PD = 97.9% and PFA = 1.1%. |
| Leak
Threshold |
0.075 gph.
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. |
| Tank
Capacity |
Maximum of 15,000
gallons.
Tank must be between 50 and 95% full. |
| Waiting
Time |
Minimum of 7
hours between delivery and testing.
There must be no dispensing or delivery during waiting time. |
| Test
Period |
Minimum of 5
hours, 30 minutes.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from average of subsets of all collected
data.
There must be no dispensing or delivery during test. |
| Temperature |
Average for
product is obtained by a single moving quartz crystal temperature sensor. |
| Water
Sensor |
Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.253 inch.
Minimum detectable change in water level is 0.029 inch. |
| Calibration |
Temperature
sensor and probe must be checked and, if necessary, calibrated in
accordance with manufacturer's instructions. |
| Comments |
Not evaluated
using manifolded tank systems. Therefore, this certification is only
applicable when there is a probe used in each tank and the siphon is broken
during testing.
Tests only portion of tank containing product.
As product level is lowered, leak rate in a leaking tank decreases (due to
lower head pressure).
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. |
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Egemin
Naamloze Vennootschap
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Evaluator:
Midwest Research Institute
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Bredabaan
1201 - 2900
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Tel:
(816) 753-7600
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Schoten,
Belgium
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Date of
Evaluation: 12/21/90
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Tel:
011-32-3-03/645 27 90
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