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Issue Date: April 18, 1997
Revision Date: December 4, 2002
Vista Precision Solutions, Inc.
(originally listed as Vista Research, Inc.)
Model LT-100
Monthly Monitoring Method and Line Tightness Test Method Version 1.0 (Manual
Method)
Line Leak Detection Method for Airport Hydrant and Field Constructed Systems
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Certification |
Leak rate of 0.2
gph with PD = 96% and PFA < 4%.
Leak rate of 0.1 gph with PD = 96% and PFA = 4%.
The USEPA has not set a minimum detectable leak rate for large diameter
pipeline systems (airport hydrant systems) at the time of this evaluation. |
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Leak Threshold |
0.177 gph for
leak rate of 0.2 gph.
0.077 gph for leak rate of 0.1 gph.
A pipeline system should not be declared tight if the test result indicates
a loss that equals or exceeds this threshold. |
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Applicability |
Gasoline, diesel,
aviation fuel, fuel oil #4.
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Specification |
System tests
fiberglass or steel piping.
Tests are conducted at operating pressure to a maximum of 200 psi.
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Pipeline Capacity |
Maximum of 3,400
gallons. |
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Waiting Time |
None between
delivery and testing. None between dispensing and testing.
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Test Period |
Minimum of 2
hours after setup and after pipeline is fully isolated.
Test data are acquired and recorded manually. Calculations are performed by
tester. |
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System Features |
System may be
permanently installed on pipeline to perform monthly monitoring or line
tightness testing, or may be transported and set up to perform line
tightness testing.
A single 2-hour test is required consisting of a 1-hour monitoring period at
operating pressure and a 1-hour monitoring period at atmospheric pressure.
Preset threshold. Printed message and alarm activation if leak is declared.
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Calibration |
System must be
calibrated in accordance with manufacturer’s instructions during system
setup. |
Vista Precision Solutions, Inc. |
Evaluator: Ken Wilcox
Associates |
2350 Lindberg Loop |
Tel: (816) 443-2494 |
Richland, WA 99354 |
Date of Evaluation: 04/15/96 |
Tel: (509) 943-2484 |
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