Issue Date: October 19,
June 27, 2011
Continuous Leak Detection System
INTERSTITIAL MONITORING METHOD (LIQUID FILLED)
Certified as a continuous, brine-filled interstitial space leak detection system
for tanks up to 30,000 gallons manufactured by Xerxes, Corp.
Fluid reservoir is attached to the top of the tank and is open to the interstice
through the bottom and is filled with a brine solution.
The reservoir is equipped with an electronic probe to provide for low level and
high level alarms.
The brine level is set at 5 inches above the low level alarm.
The low level alarm will sound for reservoirs of 18, 24, or 36 inches diameter
in 5, 9 and 19 days respectively.
Under average conditions, leaks of 0.009, 0.015, or 0.032 gal/hr will trigger
the low level alarm in 30 days for the same three reservoirs, respectively.
If the brine level is originally higher than 5 inches above the low-level alarm
point, the alarm time will be proportionally longer and the leak detection value
in thirty days will be proportionally longer.
underground double-walled storage tanks as specified above containing gasoline,
gasohol, diesel, heating oil #2, kerosene, aviation fuel, or motor oil.
Fluid in reservoir must be filled to proper level.
The method must be used with a dual-point sensor system that will
properly fit into the reservoir, is compatible with the interstitial liquid, and
is on the NWGLDE list.
Evaluator: Robert Plunkett, Ph.D.
Tel: (612) 338-0945
Minneapolis, MN 55431
Dates of Evaluations: 01/07/93, 03/28/05