Issue Date: November 22, 1995
Revision Date: June 24, 2002
(originally listed as
Gilbarco Environmental Products and later as Marconi Commerce Systems)
Environmental Management Console
EMC Basic Monitoring System Tank Monitors 2.1, 3.1,
PAO265XXX0000 (Same as Veeder-Root Model 8473)
AUTOMATIC TANK GAUGING METHOD
||Leak rate of 0.2
gph with PD = 99% and PFA = 0.1%.
Leak rate of 0.1 gph with PD = 99% and PFA = 1%.
||0.093 gph for
leak rate of 0.2 gph.
0.071 gph for leak rate of 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.
||Maximum of 15,000
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.
||Minimum of 8
hours, 18 minutes between delivery and testing for leak rate of 0.2
Minimum of 8 hours, 15 minutes between delivery and testing for leak rate
of 0.1 gph.
Minimum of 30 minutes between dispensing and testing.
There must be no delivery during waiting time.
||Minimum of 2
hours for leak rate of 0.2 gph.
Minimum of 3 hours for leak rate of 0.1 gph.
Test data are acquired and recorded by system's computer.
Leak rate is calculated from the difference between the first and last
There must be no dispensing or delivery during test.
product is determined by a minimum of 5 thermistors.
||Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.544 inch.
Minimum detectable change in water level is 0.027 inch.
probe must be checked and, if necessary, calibrated in accordance with
using manifolded tank systems. Therefore, this certification is only
applicable when there is a probe used in each tank and the siphon is broken
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
EPA leak detection regulations require testing of the portion of the tank
system which routinely contains product.
Midwest Research Institute
125 Powder Forest Dr.
Tel: (816) 753-7600
Simsbury, CT 06070-2003
Date of Evaluation:
Tel: (860) 651-2700