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Issue Date: March 3, 2000
Revision Date: March 10,
2000
Advanced
Telemetrics, Ltd.
Model 1100LD
Version 1.07
AUTOMATIC TANK
GAUGING METHOD
| Certification |
Leak rate of 0.2 gph with PD = 98.9% and PFA
= 1.1%. |
| 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. |
| Tank Capacity |
Maximum of 30,000 gallons.
Tanks less than 95% full may be tested.
Minimum product level required is 10 inches. |
| Waiting Time |
Determined automatically based on quality of tank data.
Average during
evaluation was 8 hours, 56 minutes between delivery and testing.
Dispensing during waiting time may extend waiting time.
There must be no
delivery during waiting time. |
| Test Period |
Determined automatically based on quality of tank data.
Average during
evaluation was 3 hours, 39 minutes.
Test data are acquired and recorded by
a microprocessor.
There must be no dispensing or delivery during test. |
| Temperature |
Average for product is determined by probe containing 5 or more IC
(solid state) temperature sensors.
At least one IC temperature sensor must
be submerged in product during test. |
| Water Sensor |
Must be used to detect water ingress. Minimum detectable water level in
the tank is 0.5 inch.
Minimum detectable change in water level is 0.03
inch. |
| Calibration |
IC (solid state) temperature sensors 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.
Evaluated in automatic mode where a test is run whenever conditions in
tank are quiet for a sufficient amount of time.
If test is run manually, vendor recommends waiting at least 7 hours after
delivery and allowing the automatic tank gauge to determine minimum test
period to avoid inconclusive results.
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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Advanced
Telemetrics, Ltd.
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Evaluator:
Ken Wilcox Associates
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PO Box 90413
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Tel: (816) 443-2494
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San Antonio
TX 78209
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Date
of Evaluation: 04/03/98
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Tel: (800)-382-1482 |
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E-Mail: drake@advancedtelemetrics.net |
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Website: www.advancedtelemetrics.net |
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