Laserfiche WebLink
e Fater Boards: LG 113 Page 1 of 2 <br />Issue Date: August 23, 1999 <br />Revision Date: November 5, 2007 <br />Containment Solutions, Inc. <br />(originally listed as Fluid Containment and O/C Tanks) <br />FCI Liquid Filled Interstitial Monitor <br />Tank Model DWT6 with Model FHRB 810 Level Sensor <br />CONTINUOUS INTERSTITIAL MONITORING METHOD (LIQUID -PHASE) <br />Certification: <br />Certified as a continuous, liquid -filled interstitial space leak detection system for all size tanks manufactured by C <br />Solutions, Inc. at time of evaluation. <br />Operating Principle: <br />A fluid reservoir is attached to the top of the tank and is open to the interstice through the bottom. The intestice <br />filled with a brine solution in freeze areas or water in non -freeze areas. The fluid reservoir is equipped with a due <br />sensor to provide for low level and high level alarms. The dual -point level sensor system monitors the liquid level <br />interstitial reservoir and provides an alarm if the liquid level is either too high (ingress of liquid) or too low (egres <br />Test Results: <br />System is capable of detecting leaks of 0.1 gph or smaller within one month for all size tanks manufactured by G <br />Solutions, Inc. at time of evaluation. Estimated time to activate alarm, given a leak rate of 0.1 gph and assuming <br />reservoir is 2 inches below full, ranges from 4 hours for a 500 gallon tank to 267 hours for a 50,000 gallon tank. <br />detectable leak for alarm within one month ranges from 0.0047gph for a 500 gallon tank to 0.0185 gph for a 50, <br />tank, if initial reservoir level is 50%. Other test results listed below. <br />Summary of Variable <br />Ranges Measured in the <br />Evaluation <br />Evaluation variable <br />Product level change in tank <br />Water table changes <br />Temperature changes <br />Vapor trapped in interstice <br />(with temperature change) <br />Range of conditions <br />From 0% to 90% <br />48 inches change <br />From 40 to 100 degrees F. <br />45 gallons air trapped <br />(with temperature change <br />from 40 to 100 degrees F.) <br />Estimated range of effect <br />aasoline on brine level (i <br />2.0 <br />1.6 <br />1.8 <br /><2 <br />Manufacturer's Specifications: <br />Fluid in reservoir must be filled to proper level. <br />When alarm condition exists, or annually, sensor must be removed and tested in a bucket of water, according to <br />manufacturer's instructions. <br />http://www.swrcb.ca.gov/cwphome/ust/leak_prevention/lgl13/Vendor Files/containment... 11/27/2007 <br />