Issue
Date: April 18, 1997
Revision Date: April 9, 2002
Veeder-Root
(originally listed as Control Engineers)
CEI
3000 Tank Level Module - Version TLP2
Normal/Rapid Test Mode
(Magnetostrictive Probe)
AUTOMATIC
TANK GAUGING METHOD
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Certification
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Leak rate of 0.2 gph with
PD = 95.0% and PFA = 0.1% for normal test mode. Leak
rate of 0.2 gph with PD = 95.0% and PFA = 5.0% for rapid
test mode.
Leak rate of 0.1 gph with PD = 99.2% and PFA = 0.08%
for normal test mode. Leak rate of 0.1 gph with PD =
95.0% and PFA = 5.0% for rapid test mode.
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Leak
Threshold
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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.
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Applicability
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Gasoline, diesel, aviation
fuel.
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Tank
Capacity
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Maximum of 15,000 gallons.
Tank must be between 50 and 95% full for leak rate of
0.2 gph.
Tank must be minimum 95% full for leak rate of 0.1 gph.
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Waiting
Time
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Minimum of 6 hours, 40
minutes between delivery and testing.
There must be no dispensing or delivery during waiting
time.
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Test
Period
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Minimum of 4 hours for
normal test mode and 1 hour, 12 minutes for rapid test
mode and for leak rate of 0.2 gph.
Minimum of 6 hours, 23 minutes for normal test mode
and 2 hours, 40 minutes for rapid test mode and for
leak rate of 0.1 gph.
Test data are acquired and recorded by a microprocessor.
Leak rate is calculated from data determined to be valid
by statistical analysis.
There must be no dispensing or delivery during test.
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Temperature
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Average for product is
determined by a minimum of 5 temperature resistance
detectors (RTDs).
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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 0.49 inch.
Minimum detectable change in water level is 0.05 inch.
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Calibration
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RTDs 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 system which routinely contains
product.
Control Engineers no longer manufactures this equipment.
The company and rights for this product were sold to
Veeder-Root.
*For product support information, contact Veeder-Root.
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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