Issue Date: November 22, 1995
Revision Date: March 1, 2011

Veeder-Root

TLS-200, 200i, 250i, 300, 300C, 300i, 350, 350PC, 350R, 350RPC, 350Plus, Red Jacket ProMax and ProPlus UST ATGS (Model 7842 Digital Sensing Capacitance Probe)

Automatic Tank Gauging Method

Certification Leak rate of 0.2 gph with PD = 99% and PFA = 1%.
Leak Threshold 0.1 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 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.
Waiting Time Maximum of 15,000 gallons.
Tank must be between 50 and 95% full.
Test Period Minimum of 5 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 a temperature averaging probe.
Water Sensor Must be used to detect water ingress.
Minimum detectable water level in the tank is 1.40 inches.
Minimum detectable change in water level is 0.040 inch.
Calibration Temperature averaging 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 system which routinely contains product.
Capacitance probes do not work with oxygenated fuels.

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
    Email: info@veeder.com
    URL: www.veeder.com/us
  • Evaluator: Midwest Research Institute
    Tel: (816) 443-2494
    Date of Evaluation: 05/14/93

Home |  Vendors: A–F |  Vendors: G–M |  Vendors: N–S |  Vendors: T–Z |  Method Index

Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and regulations. For full details, please refer to our expanded DISCLAIMER page.