Issue Date: August 23, 1999
Revision Date: March 1, 2011

Veeder-Root

(originally listed as Marley Pump Co.)

Prolink System RJE Probes # RE-400-094 thru 112-5 (Magnetostrictive Probes)

Automatic Tank Gauging Method

Certification Leak rate of 0.2 gph with PD = 99.95% and PFA = 0.005%.
Leak rate of 0.1 gph with PD = 95.2% and PFA = 0.5%.
Leak Threshold -0.116 gph to declare a leak for leak rate of 0.2 gph.
0.084 gph to declare a gain for leak rate of 0.2gph.
-0.065 gph to declare a leak for leak rate of 0.1 gph.
0.035 gph to declare a gain for leak rate of 0.1 gph.
A tank system should not be declared tight if the test indicates a loss or gain that equals or exceeds the threshold.
Applicability Gasoline, diesel, biodiesel blends B6-B20 meeting ASTM D7467, biodiesel B100 meeting ASTM D6751*.
Other liquids with known coefficients of expansion and density may be tested after consultation with the manufacturer.
*NWGLDE Listings apply to leak detection functionality only and not material compatibility - see Disclaimer.
Tank Capacity Maximum of 18,000 gallons.
Tanks less than 95% full may be tested.
Minimum product level required is based on tank diameter as follows:
48" dia/ min 16";
64" dia/ min 21";
72" dia/ min 24";
126" dia/ min 41".
For other tank diameters, see evaluation report.
Waiting Time Minimum of 13 hours 54 minutes between delivery and testing.
Minimum of 10 minutes between dispensing and testing.
There must be no delivery during waiting time.
Test Period Minimum of 4 hours, 31 minutes for leak rate of 0.2 gph.
Minimum of 6 hours, 39 minutes for leak rate of 0.1 gph.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from all the data collected during entire test period.
There must be no dispensing or delivery during testing.
Temperature Probe contains 5 or more resistance temperature detectors (RTDs) to monitor product temperature.
At least one RTD must be submerged in product during testing.
Water Sensor Must be used to detect water ingress.
Minimum detectable water level in the tank is 0.106 inches.
Minimum detectable change in water level is 0.058 inches.
System Features Permanent installation on pipeline.
Automatic testing of pipeline.
Preset threshold.
Total vertical rise of pipeline must not exceed 6 feet above leak detector.
Single test to determine if pipeline is leaking.
Restricted flow to dispenser if leak is declared.
Calibration RTDs 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.
System has a bias of -0.016 gph for leak rate of 0.2 gph.
System has a bias of -0.015 gph for leak rate of 0.1 gph.
Tests only the 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. 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).
  • Veeder-Root
    125 Powder Forest Dr.
    Simsbury, CT 06070-2003
    Tel: (860) 651-2700
  • Evaluator: ADA Technologies, Inc.
    Tel: (303) 792-5615
    Date of Evaluation: 10/29/96

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