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Issue Date: August 23, 1999
Revision Date: June 24, 2002
Veeder-Root
(originally listed as
Gilbarco Environmental Products and later as Marconi Commerce Systems)
EMC/PC Series
Monitoring Systems
PA0265 (Same as Veeder-Root Model 8473),
PA0300 (Same as Veeder-Root Model 8473)
(Magnetostrictive Probe)
AUTOMATIC TANK GAUGING METHOD
| Certification |
Leak rate of 0.2
gph with PD = 99.5% and PFA = 1.6%. |
| Leak
Threshold |
0.126 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.
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| Tank
Capacity |
Maximum of 20,000
gallons.
Tanks less than 95% full may be tested.
Minimum product level required is based on tank diameter as follows:
48" dia/min 18";
64" dia/min 21";
72" dia/min 24";
96" dia/min 30";
126" dia/min 39";
132" dia/min 39".
For other tank diameters see evaluation report. |
| Waiting
Time |
Minimum of 8
hours between delivery and testing.
Minimum of 30 minutes between dispensing and testing.
There must be no delivery during waiting time. |
| Test
Period |
Minimum of 2
hours.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from the difference between the first and last
data collected.
There must be no dispensing or delivery during test. |
| Temperature |
Average for
product is determined by probe which contains 5 thermistors.
At least two thermistors must be submerged in product during test. |
| Water
Sensor |
Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.66 inch.
System is programmed to report water depth only when it exceeds 0.75
inch.
Minimum detectable change in water level is 0.005 inch. |
| Calibration |
Thermistors 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
which routinely contains product. |
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Veeder-Root
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Evaluator: Ken
Wilcox Associates
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125 Powder Forest Dr.
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Tel: (816)
443-2494
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Simsbury, CT 06070-2003
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Date of Evaluation:
06/29/98
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Tel: (860) 651-2700
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E-mail:
info@veeder.com |
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URL:
www.veeder.com |
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