OPW M2010-EU, Installation Manual

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Appendix D - NWGLDE Evaluation
Certification Leak rate of 0.2 gph with PD = 98.18% and PFA = 1.82% using 924B probe with 2” dia float.
Leak
Threshold
0.1 gph for leak rate of 0.2 gph using 924B probe with 2” dia floats. 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 Capa-
city Maximum of 20,000 gallons. Tank must be minimum 50% full for leak rate of 0.2 gph using
924B probe.
Waiting
Time Minimum of 6 hours between delivery and testing using 924B probe. There must be no delivery
during waiting time.
Test Period
Average data collection time of 2 hours using 924B probe for leak rate of 0.2 gph. Test data are
acquired and recorded by system's computer. There must be no dispensing or delivery during
test.
Temperature Average for product is determined by a probe containing 5 thermistors.
Water
Sensor
Minimum detectable water level that can be detected by the 2” dia float is 0.75 inch. Minimum
detectable change in water level that can be detected by the 2” dia float is 0.080 inch.
Calibration
Thermistors (or 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.
2012 console comparison with OPW iSite; which was based on 2-26-2008 evaluation of OPW
iSite.
OPW Fuel Management Systems
6900 Santa Fe Dr. Hodgkins, IL60525-9909
Tel: (708) 485-4200
E-Mail: info@opwfms.com
URL: www.opwfms.com
Evaluator: Ken Wilcox Asso-
ciatesTel: (816) 443-2494
Date of Evaluation: 08/03/2013
Doc. No.: M2010-EU Rev.: 13
Page 114 of 149