Certification

Leak rate of 0.2 gph with PD = 95.0% and PFA = 0.1% for normal test mode.
Leak rate of 0.2 gph with PD = 95.0% and PFA = 5.0% for rapid test mode. 
Leak rate of 0.1 gph with PD = 99.2% and PFA = 0.08% for normal test mode.
Leak rate of 0.1 gph with PD = 95.0% and PFA = 5.0% for rapid test mode.

Leak Threshold

0.1 gph for leak rate of 0.2 gph.
0.05 gph for leak rate of 0.1gph. 
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.

Tank Capacity

Maximum of 15,000 gallons. 
Tank must be between 50 and 95% full for leak rate of 0.2 gph. 
Tank must be minimum 95% full for leak rate of 0.1 gph.

Waiting Time

Minimum of 6 hours, 40 minutes between delivery and testing. 
There must be no dispensing or delivery during waiting time.

Test Period

Minimum of 4 hours for normal test mode and 1 hour, 12 minutes for rapid test mode and for leak rate of 0.2 gph. 
Minimum of 6 hours, 23 minutes for normal test mode and 2 hours, 40 minutes for rapid test mode and for leak rate of 0.1 gph. 
Test data are acquired and recorded by a microprocessor. 
Leak rate is calculated from data determined to be valid by statistical analysis. 
There must be no dispensing or delivery during test.

Temperature

Average for product is determined by a minimum of 5 temperature resistance detectors (RTDs).

Water Sensor

Must be used to detect water ingress. 
Minimum detectable water level in the tank is 0.49 inch. 
Minimum detectable change in water level is 0.05 inch.

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. 
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. 
Control Engineers no longer manufactures this equipment. 
The company and rights for this product were sold to Veeder-Root. 
*For product support information, contact Veeder-Root.

Veeder-Root

Evaluator:  Midwest Research Institute

125 Powder Forest Dr.

Tel:  (816) 753-7600

Simsbury, CT  06070-2003

Dates of Evaluations:  05/21/92, 05/27/92

E-mail:  info@veeder.com

URL:  www.veeder.com