Issue Date: August 23, 1999
Revision Date: June 24, 2002

Veeder-Root

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

EMC/PC Series Monitoring Systems PA0265 (Same as Veeder-Root Model 8473), PA0300 (Same as Veeder-Root Model 8473) (Magnetostrictive Probe)

Automatic Tank Gauging Method

Certification Leak rate of 0.2 gph with PD = 99.5% and PFA = 1.6%.
Leak Threshold 0.126 gph.
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, aviation fuel.
Other liquids with known coefficients of expansion and density may be tested after consultation with the manufacturer.
Tank Capacity 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.
Waiting Time Minimum of 8 hours between delivery and testing.
Minimum of 30 minutes between dispensing and testing.
There must be no delivery during waiting time.
Test Period 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.
Temperature Average for product is determined by probe which contains 5 thermistors.
At least two thermistors must be submerged in product during test.
Water Sensor Must be used to detect water ingress.
Minimum detectable water level in the tank is 0.66 inch.
System is programmed to report water depth only when it exceeds 0.75 inch.
Minimum detectable change in water level is 0.005 inch.
Calibration Thermistors and probe must be checked and, if necessary, calibrated in accordance with manufacturer's instructions.
Comments

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.
  • Veeder-Root
    125 Powder Forest Dr.
    Simsbury, CT 06070-2003
    Tel: (860) 651-2700
  • Evaluator: Ken Wilcox Associates
    Tel: (816) 443-2494
    Date of Evaluation: 06/29/98

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