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Issue Date: November 22, 1995
Revision Date: March 1, 2011
Veeder-Root
(originally listed as Marley Pump Co.)
Sonic
Technology (ST) 1400-1800 Series Tank Monitoring System,
ProLink System with Ultrasonic Network Card,
ATG Automatic Tank
Gauging Monitor,
LLM Series Liquid Level Monitor, FMS Fuel Management Monitor
(Ultrasonic Probe)
AUTOMATIC TANK GAUGING METHOD
| Certification |
Leak rate of 0.2 gph with PD =
99.9% and PFA = 2.98% for single tanks.
Leak rate of 0.2 gph with PD = 99.9% and PFA = 2.53% for manifolded tanks.
Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.01%. |
| Leak
Threshold |
0.1 gph for leak
rate of 0.2 gph.
0.05 gph for leak rate of 0.1gph.
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,
jet fuel, biodiesel blends B6-B20 meeting ASTM D7467, biodiesel B100
meeting ASTM D6751.
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| Tank
Capacity |
For leak rate of 0.2 gph:
Maximum of 73,530 gallons.
Maximum of 73,530 gallons cumulative capacity for manifolded tank systems
with no more than 4 tanks in the system.
Tank must contain at least 15 inches of product.
For leak rate of 0.1 gph:
Maximum of 18,000 gallons.
Tank must be minimum 95% full. |
| Waiting
Time |
Minimum of 9.1
hours between delivery and testing for leak rate of 0.2 gph.
Minimum of 12 hours between delivery and testing for leak rate of 0.1
gph.
None between dispensing and testing.
There must be no delivery during waiting time. |
| Test
Period |
Minimum of 2
hours, 20 minutes for a leak rate of 0.2 gph.
Minimum of 2 hours, 21 minutes for a leak rate of 0.1 gph.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from all data collected.
There must be no dispensing or delivery during test. |
| Temperature |
Average for product is
determined by five or more temperature sensors. |
| Water
Sensor |
Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.112 inch.
Minimum detectable water level change is 0.011 inch. |
| Calibration |
Temperature
sensors and probe must be checked and, if necessary, calibrated in
accordance with manufacturer's instructions. |
| Comments |
Evaluated using
both single and manifolded tank systems with probes in each tank.
The difference between the product level and groundwater level must be at
least 2.75 feet if groundwater is present above the bottom of the tank.
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
system which routinely contains product.
System was previously known as LT1 Automatic Product Level Monitor and was
manufactured by Level Tech, Inc. (purchased by Marley 9/91). |
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Veeder-Root
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Evaluator:
ADA Technologies
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125 Powder Forest Dr.
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Tel:
(303) 792-5615
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Simsbury, CT 06070-2003
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Dates of
Evaluations: 09/25/92, 09/30/92, 02/05/96, 11/21/98
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Tel: (860) 651-2700
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E-mail: info@veeder.com |
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URL: www.veeder.com |
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