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Performance Report
UST Program - LG 113

UST Program - LG 113

Issue Date: November 19, 2010

Vista Research, Inc.

Model HT-100 Monitoring Method and Line Tightness Test Method Version 2.1


Certification Leak rate of 0.00189% of line capacity (0.00189 gph per 1000 gallons of product) with PD = 95% and PFA = 5% for Version 2.1, (smallest leak rate for this evaluation, which was conducted on a 160,000 gallon line at 150 psi, was 3.03 gph).
The USEPA has not set a minimum detectable leak rate for large diameter pipeline systems (airport hydrant systems) at the time of this evaluation.
Leak Threshold 0.000945% of line volume in gph.
A pipeline system should not be declared tight if the test result indicates a loss that equals or exceeds these thresholds.
Applicability Gasoline, diesel, aviation fuel, fuel oil #4, biodiesel B6-B20 meeting ASTM D7467, biodiesel B100 meeting ASTM D6751.
Pipelines containing other liquids may be tested after approval from the manufacturer.
Specification System tests fiberglass or steel piping.
Pipeline Capacity Maximum of 320,000 gallons. Minimum of 3,000 gallons.
Throughput Monthly maximum of 391,250 gallons.
Waiting Time None between delivery and testing.
None between dispensing and testing.
Test Period Minimum 60 minutes after setup.
Test data are acquired and recorded by a microprocessor.
Calculations are automatically performed by the microprocessor.
System System may be permanently installed on pipelines to perform monitoring, or may be transported and set up to perform line tightness testing.
Features A single 60-minute test is required consisting of a 30-minute monitoring period at operating pressure, and a 30-minute monitoring period at a lower pressure, approximately 30 psi.
System measures change in pressure and reports output quantity in gph, while compensating for thermal effects.
Printed message and alarm activation if leak is declared.
Calibration System must be calibrated prior to the initial test in accordance with manufacturer’s instructions.
Comments System is to be used only on large bulk pipelines and airport hydrant fueling systems.
Vista Research, Inc.
755 North Mary Ave.
Sunnyvale, CA 94085
Tel: (408) 830-3300
Evaluator: Ken Wilcox Associates
Tel: (816) 443-2494
Date of Evaluation: 08/25/07

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