Issue Date: August 23, 1999
Revision Date: July 23, 2015

Veeder-Root

TLS 300, 350, 350R, 350Plus, 8600 Series (Consoles TLS-450 and TLS-450PLUS), TLS2, Red Jacket ProMax and ProPlus (Models 8463, 8473, 8493 Magnetostrictive Probes)

Automatic Tank Gauging Method

Certification Leak rate of 0.2 gph with PD = 95.6% and PFA = 0.3%.
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, biodiesel blends B-6-B20 meeting ASTM D7467, biodiesel B100 meeting ASTM D6751.
Tank Capacity Maximum of 30,000 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 for model 8463 and 8493 probe.
Minimum detectable water level in the tank is 0.75 inch for model 8473 probe.
Minimum detectable water level in the tank is 0.38 inch when using TLS 350 with model 8463 probe with 88610x-0x0 water float and software version 30B or higher, or 8600 series with software version 3A or higher.
Minimum detectable change in water level is 0.005 inch.
Minimum detectable change in water level in tank is 0.01 inch when using TLS 350 with model 8463 probe with 88610x-0x0 water float and software version 30B or higher, or 8600 series with software version 3A or higher.
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, (Revised 4/17/02, 2/29/08), 08/31/10 (water sensor), 02/29/08 (TLS-450 console comparison), 10/06/14 (TLS-450PLUS console comparison)

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