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Issue Date: August 23, 1999
Revision Date: July 23, 2015
Veeder-Root
TLS
300, 350, 350R, 350Plus, 8600 Series (Console TLS-450 and TLS-450PLUS), TLS2, Red Jacket ProMax and
ProPlus
(Models 8463, 8473, 8493 Magnetostrictive Probes)
AUTOMATIC
TANK GAUGING METHOD
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Certification
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Leak
rate of 0.2 gph with PD = 99.5% and PFA = 1.6% for 2 hour
test.
Leak rate of 0.1 gph with PD = 96.0% and PFA = 3.4% for
5 hour test.
Leak rate of 0.1 gph with PD = 96.2% and PFA = 2.2% for
4 hour test.
Leak rate of 0.1 gph with PD = 96.4% and PFA = 1.5% for
3 hour test.
Leak rate of 0.1 gph with PD = 97.3% and PFA = 2.3% for
2 hour test.
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Leak
Threshold
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0.126
gph for leak rate of 0.2 gph.
0.071 gph for leak rate of 0.1 gph.
A tank system should not be declared tight if the test
result indicates a loss or gain that equals or exceeds
this threshold.
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Applicability
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Gasoline,
diesel, aviation fuel, biodiesel blends B-6-B20 meeting ASTM D7467, biodiesel B100 meeting ASTM D6751.
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Tank
Capacity
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Maximum
of 20,000 gallons.
Tanks less than 95% full may be tested. Minimum product
level required is based on tank diameter as follows:
48" dia/min 18";
64" dia/min 21";
72" dia/min 24";
96" dia/min 30";
126" dia/min 39";
132" dia/min 39".
For other tank diameters, see evaluation report.
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Waiting
Time
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Minimum
of 8 hours between delivery and testing for 2 hour test
and leak rate of 0.2 gph.
Minimum of 8 hours between delivery and testing for 5
hour test and leak rate of 0.1 gph.
Minimum of 9 hours between delivery and testing for 4
hour test and leak rate of 0.1 gph.
Minimum of 10 hours between delivery and testing for 3
hour test and leak rate of 0.1 gph.
Minimum of 11 hours between delivery and testing for 2
hour test and leak rate of 0.1 gph.
Minimum of 30 minutes between dispensing and testing.
There must be no delivery during waiting time.
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Test
Period
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Minimum
of 2 hours.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from the difference between the
first and last data collected.
There must be no dispensing or delivery during test.
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Temperature
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Average
for product is determined by probe which contains 5 thermistors.
At least two thermistors must be submerged in product
during test.
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Water
Sensor
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Must
be used to detect water ingress.
Minimum detectable water level in the tank is 0.66 inch for model 8463 and 8493 probe.
Minimum detectable water level in the tank is 0.75 inch for model 8473 probe.
Minimum detectable water level in the tank is 0.38 inch when using TLS 350 with model 8463 probe with 88610x-0x0 water float and software version 30B or higher, or 8600 series with software version 3A or higher.
Minimum detectable change in water level is 0.005 inch
for leak rate of 0.2 gph.
Minimum detectable change in water level is 0.027 inch
for leak rate of 0.1 gph.
Minimum detectable change in water level in tank is 0.01 inch when using TLS 350 with model 8463 probe with 88610x-0x0 water float and software version 30B or higher, or 8600 series with software version 3A or higher.
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Calibration
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Thermistors
and probe must be checked and, if necessary, calibrated
in accordance with manufacturer's instructions.
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Comments
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Not
evaluated using manifolded tank systems. Therefore,
this certification is only applicable when there is
a probe used in each tank and the siphon is broken during
testing.
Tests only portion of tank containing product.
As product level is lowered, leak rate in a leaking
tank decreases (due to lower head pressure).
Consistent testing at low levels could allow a leak
to remain undetected.
EPA leak detection regulations require testing of the
portion of the tank which routinely contains product.
California regulations
require at least one test per month after routine product
delivery or when the tank is filled to within 10% of
the highest operating level of previous month. If the
0.1 gph test is used as a tank tightness test there
must be no water present in the backfill (groundwater
must be below the bottom of the tank), the tank must
be equipped with an overfill protection device, and
the product level in the tank must be at the overfill
protection device set point. Local agency pre-approval
is required. To use the 0.1 gph test as a monthly option
see title 23 CCR Section 2643 (b)(2).
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Veeder-Root
125
Powder Forest Dr.
Simsbury, CT 06070-2003
Tel:
(860) 651-2700
E-mail: info@veeder.com
URL: www.veeder.com |
Evaluator: Ken Wilcox Associates
Tel:
(816) 443-2494
Dates
of Evaluations: 06/29/98,
(Revised 4/17/02, 2/29/08), 08/31/10 (water sensor), 02/29/08 (TLS-450 console comparison), 10/06/14 (TLS-450PLUS console comparison)
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