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UST Program - LG 113

UST Programs - LG 113

Issue Date: November 14, 1997
Revision Date: June 8, 2005

(originally listed as Gilbarco Environmental Products and later as Marconi Commerce Systems)

EMC, EMC Basic, EMC Enhanced with CSLD,
PAO265XXXX100 (Same as Veeder-Root Model 8473),
PA0300XXXX100 (Same as Veeder-Root Model 8473)
(Magnetostrictive Probe)


Certification Leak rate of 0.2 gph with PD = 100% and PFA = 0%.
Leak Threshold 0.16 gph for single tanks at 99% operating mode. 
0.15 gph for manifolded tank systems at 99% operating mode. 
A tank system should not be declared tight, and a message is printed for the operator, if the test results indicate a loss or gain that exceeds this threshold.
Applicability Gasoline, diesel, aviation fuel. 
Other liquids with known coefficients of expansion and density may be tested after consultation with the manufacturer.
Tank Capacity 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.
Throughput Monthly maximum of 221,890 gallons.
Waiting Time Minimum of 3 hours stabilization time is allowed between delivery and data collection.
Test Period 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.
Temperature Average for product is determined by a minimum of 5 thermistors.
Water Sensor 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.
Calibration Thermistors and 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.

During installation, the set-up menu provides a choice between a 99% or a 95% operating mode. 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 idle." 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 tank sites. 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.



Evaluator:  Midwest Research Institute

125 Powder Forest Dr.

Tel:  (816) 753-7600

Simsbury, CT 06070-2003

Date of Evaluation:  06/10/96, 4/02/02

Tel: (860) 651-2700


E-mail: dhalla@veeder.com


URL: www.veeder.com/dynamic/index.cfm


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