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Issue Date: November 22, 1995
Revision Date: November 21, 2003
Veeder-Root
(originally listed as Entropy Limited)
Precision Tank
Inventory Control System, Revision 90
STATISTICAL INVENTORY
RECONCILIATION TEST METHOD (QUANTITATIVE)
| Certification |
Leak rate of 0.1
gph with PD = 99.5% and PFA < 0.5%.
"If a method meets the requirement for detecting a leak rate of 0.1
gph, it will meet the requirement for 0.2 gph.", according to
"Standard Test Procedures for Evaluating Leak Detection Methods:
Statistical Inventory Reconciliation Methods", EPA/530/UST-90/007,
June 1990, Section 7.2.3, page 30. |
| Leak
Threshold |
0.05 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.
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| Tank
Capacity |
Maximum of 22,500
gallons for single tanks.
Maximum of 60,000 gallons cumulative capacity for manifolded tank systems
with no more than 3 tanks in system. |
| Data
Requirement |
Minimum of 30
days of product level and flow through data. |
| Comments |
32% of data sets
evaluated were from manifolded tank systems.
Of 56 data sets submitted for evaluation, 6 were not analyzed due to
unusable data and none were inconclusive.
Median monthly throughput of tanks evaluated was 52,207 gallons.
Leak rates ranging from 0.0497 to 0.203 gph were used in evaluation.
Data sets evaluated were supplied by evaluator. |
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Gilbarco/Veeder Root
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Evaluator: Simpson, Gumpertz and Heger, Inc.
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Attn: CMS Mailstop F-76
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Tel: (617) 643-2000
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7300 West Friendly Ave.
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Date of Evaluation: 11/30/93
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P.O. Box 22087 |
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Greensboro, NC 27420-2087 |
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Tel: (800) 253-8054
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