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Issue Date: November 22, 1995
Revision Date: October 18, 2002
OPW Fuel Management
Systems
(originally listed as Emco Electronics, Tuthill Transfer Systems)
EECO System
1000, 1500, 2000, 3000 and Galaxy 0.2 gph Precision Test and Quick Test
(Q0400-4xx Magnetostrictive Probe)
AUTOMATIC TANK GAUGING METHOD
| Certification |
Leak rate of 0.2
gph with PD = 99.1% and PFA = 0.9% for Precision Test.
Leak rate of 0.2
gph with PD = 95.4% and PFA = 4.6% for Quick Test. |
| Leak
Threshold |
0.1 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, fuel oil #4.
Other liquids with known coefficients of
expansion and density may be tested after consultation with the
manufacturer. |
| Tank
Capacity |
Maximum of 15,000
gallons. Tanks less than 95% full may be tested. Minimum product level
required based on tank diameter as follows:
48" dia/min 8.5";
64" dia/min 10.5";
72" dia/min 11.5";
96" dia/min 14";
126" dia/min 18".
For other tank diameters, see evaluation report. |
| Waiting
Time |
Between delivery
and testing ranges from 1 to 6 hours depending on tank conditions.
None between dispensing and testing.
There must be no delivery during waiting time. |
| Test
Period |
Average of 2
hours, 46 minutes during Precision Test evaluation.
Average of 1 hour, 9 minutes during Quick Test evaluation.
Test data are acquired and recorded by a microprocessor which
automatically determines test time based on tank size and product
level.
There must be no dispensing or delivery during test. |
| Temperature |
Probe contains 5
resistance temperature detectors (RTDs) to monitor average product
temperature.
At least one RTD 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 inches.
Minimum detectable change in water level is 0.039 inches. |
| Calibration |
RTDs 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 the 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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OPW Fuel Management Systems
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Evaluator: Ken
Wilcox Associates
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6900
Santa Fe Dr.
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Tel: (816)
443-2494
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Hodgkins, IL 60525
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Dates of Evaluation:
12/23/93, 06/20/94
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Tel:
(708) 485-4200
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08/17/95, 07/28/97, 11/17/99
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E-Mail:
info@opwfms.com |
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URL: www.opwfms.com |
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