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Issue
Date: November 22, 1995
Revision Date: February 22, 2017
Veeder-Root
(originally
listed as Ustman Industries, Inc.)
USTMAN
SIR Versions 95.2, 95.2A, 95.2B
STATISTICAL
INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)
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Certification
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Leak
rate of 0.1 gph with PD > 99.2% and PFA < 0.08%
(Version 95.2).
Leak rate of 0.2 gph with PD > 99.9% and PFA < 0.1%
(Version 95.2A).
Leak rate of 0.2 gph with PD > 97.2% and PFA < 0.1%
(Version 95.2B).
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Leak
Threshold
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If
the absolute value of the calculated leak rate (gain or
loss) is less than the leak threshold and the minimum
detectable leak rate is less than or equal to 0.2 gph
(0.1 gph for the 0.1 gph test), the test result is "pass."
If the absolute value of the calculated leak rate is greater
than or equal to the leak threshold, the result is "fail."
If the minimum detectable leak rate exceeds 0.2 gph (0.1
gph for the 0.1 gph test) and the absolute value of the
calculated leak rate is less than the leak threshold,
the test result is "inconclusive."
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Applicability
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Gasoline,
diesel. Other more viscous liquids may be tested after
consultation with the vendor.
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Tank
Capacity
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Maximum
of 60,000 gallons for single tanks.
Maximum of 60,000 gallons cumulative capacity for manifolded
tank systems with no more than 4 tanks in system.
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Data
Requirement
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Minimum
of 30 days of product level and flow through data.
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Comments
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44%
of data sets evaluated were from manifolded tank systems.
Of 94 data sets submitted for evaluation, all were analyzed
with conclusive results.
Results obtained from combined data for USTMAN Version
94.1 and 95.2.
Data used in the evaluation were obtained from manual
tank sticking.
Median monthly throughput of tanks evaluated was 15,483
gallons.
Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation.
Data sets evaluated were supplied by evaluator.
The UstmanSIR method version 95.2B does not meet the Federal UST requirement for Statistical Inventory Reconciliation to use a threshold that does not exceed one-half the minimum detectable leak rate. (40 Code of Federal Regulations, part 280, subpart 43, subdivision (h), paragraph (3).)
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Gilbarco/Veeder Root
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Evaluator: Ken Wilcox Associates
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Attn:
CMS Mailstop F-76
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Tel: (816) 443-2494
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7300
West Friendly Ave.
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Dates
of Evaluations: 12/12/95,
07/21/00
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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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