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Issue
Date: September 15, 2003
Revision Date: June 8, 2005
Warren Rogers Associates, Inc.
WRA PetroNetwork S3 (Version D)
Continual Reconciliation System for
CITLDS Using Multiple ATG System
with Magnetostrictive Tank Probes for Tanks and
Associated Pipelines
CONTINUOUS IN-TANK LEAK DETECTION
METHOD
(Continual Reconciliation)
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Certification |
Leak rate of 0.2 gph for tanks and
associated pipelines with PD > 99% and PFA < 1%. |
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Leak Threshold |
0.1 gph for single and manifolded tank
systems including associated pipelines.
A tank system should not be declared tight and a message printed for the
operator, if the test results indicate a loss or gain that exceeds this
threshold. |
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Applicability |
Gasoline, diesel, aviation fuel, fuel oil
#4.
System is designed primarily for use with petroleum fuels. |
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Tank Capacity |
Maximum of 100,000 gallons for single tanks
and for up to 5 tanks manifolded together.
Tank must be between 9% and 94.4% full.
Contact manufacturer for tank system applications if total tank capacity
exceeds 100,000 gallons. |
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Throughput |
Monthly maximum of 2,718,013 gallons.
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Waiting Time |
None between delivery and data collection
when difference between product in tank and product delivered is 7.4 degrees
F or less. |
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Test Period |
Data collection time ranges from 6 to 31
days.
Data sampling frequency is every 1 to 15 minutes.
System collects data at naturally occurring product levels upon completion
of a sales transaction or set of overlapping sales transactions without
interfering with normal tank operation, and at time periods when the tank
system is dormant. |
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Temperature |
Average for product is determined by a
minimum of 5 thermistors. |
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Water Sensor |
Must be used to detect water ingress in
accordance with the certified performance of the Automatic Tank Gauge used.
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Calibration |
The Automatic Tank Gauge used must have
thermistors and probe checked and, if necessary, calibrated in accordance
with manufacturer's instructions.
Meter calibration must be checked at outset of monitoring and recalibrated
when system detects significant departure from original calibration.
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Comments |
Tests only the portion of tank system
containing product.
System reports a result of “pass” or “fail” and indicates minimum detectable
leak and leak threshold for tanks and associated pipelines.
Evaluated for tanks and associated pipelines for both single and manifolded
tank systems
with probes in each
tank.
For valid monthly testing, a conclusive report must be generated for each
tank system every month.
Constant and variable leaks were mathematically induced into tight tank
records and data collected at various tank sites by previously evaluated
Veeder-Root TLS-350 and OPW Fuel Management Systems EECO 1500 Automatic Tank
Gauges with magnetostrictive probes.
Automatic Tank
Gauges used with this method must be on the NWGLDE List, employ a
magnetostrictive probe, and be certified at a leak rate of 0.1 gph.
The database for evaluation of the system included tank and pipeline
leaks at sites with vapor recovery and blending dispensers.
System is designed for use with pipelines equipped with mechanical or
electronic line leak detectors to detect emergent catastrophic leaks in the
pipelines.
Tank systems used in this evaluation contained gasoline and diesel.
Custom tank charts are generated for each tank system.
Meter Drift analyses are performed during monitoring. |
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Warren
Rogers Associates, Inc. |
Evaluator: Ken Wilcox Associates |
|
747
Aquidneck Avenue. |
Tel:
(816) 443-2494 |
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Middletown, RI 02840 |
Date of
Evaluation: 07/11/2003 |
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Tel:
(800) 972-7472 |
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E-mail: info@wraenviro.com |
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URL: www.wraenviro.com |
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