Issue Date: November 14, 1997
Revision Date: June 8, 2005
(originally listed as
Gilbarco Environmental Products and later as Marconi Commerce Systems)
Basic, EMC Enhanced with CSLD,
PAO265XXXX100 (Same as Veeder-Root Model 8473),
PA0300XXXX100 (Same as Veeder-Root Model 8473)
CONTINUOUS IN-TANK LEAK
(Continuous Automatic Tank Gauging)
||Leak rate of 0.2
gph with PD = 100% and PFA = 0%.
||0.16 gph for
single tanks at 99% operating mode.
0.15 gph for manifolded tank systems at 99% operating mode.
||Maximum of 38,170
gallons for single tanks and for all tanks manifolded together.
Contact manufacturer for tank system applications if total tank capacity
exceeds 30,000 gallons.
of 221,890 gallons.
||Minimum of 3
hours stabilization time is allowed between delivery and data collection.
time ranges from 5 to 28 days.
Data sampling frequency is every 1 to 4 seconds.
System collects data at naturally occurring product levels without
interfering with normal tank operation, and discards data from unstable
periods when system performs test.
product is determined by a minimum of 5 thermistors.
||Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.54 inch.
Minimum detectable change in water level is 0.027 inch.
probe must be checked annually and, if necessary, calibrated in accordance
with manufacturer's instructions.
System set-up menu must be checked to verify that the 99% operating mode
option has been selected.
installation, the set-up menu provides a choice between a 99% or a 95%
This evaluation covers only the 99% operating mode.
At this time, there is no evaluation covering the 95% mode.
System reports a result of "pass" or "fail."
Evaluated using both single and manifolded tank systems
with probes in each tank.
System distinguishes large leak rates (> 1gph) from dispensing
activities and reports those as "fail" or as "no
For valid monthly testing, a conclusive test report must be produced for
each tank every month.
Systems warns the operator if there are no " passing" tests
completed during the month.
For very active tanks, a tank shut down may become necessary in order for
the system to collect enough quiet-time data for a test.
Constant and variable leaks were mathematically induced into tight tank
test records which were collected by systems installed at various active
The data base for evaluation of the system included sites with vapor
recovery and blending dispensers.
Tanks used in this evaluation contained gasoline and diesel.
Midwest Research Institute
125 Powder Forest Dr.
Tel: (816) 753-7600
Simsbury, CT 06070-2003
Dates of Evaluations:
Tel: (860) 651-2700