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• • a. -a Hydrostatic Liam Tank Monitor For Owens-Corning Double-Wall Tanks Model DWT-213 and DWT-4 An Optional Monitoring System That's Simple and Totally Reliable The primary function of a tank monitor is to detect a breach -- Liquid Media in the outer or inner tank under all circumstances.Only a Reservoir pressure type system will fulfill this criteria.Owens-Corning recommends and supplies a hydrostatic monitor to con- _v� water able tinuously monitor both the outer and inner tank wall. The hydrostatic monitor works on the principle of liquid Inner wall breach head pressure. Liquid media goes into p "" _"""'" tank;prevents product The major component is a translucent reservoir,which is from escaping. piped(contractor provided)to the tank cavity and then - -- outer wall breach Liquid media goes into filled with liquid.A drop in the liquid level of the reservoir tank excavation. (indicating a tank leak)can be visually observed. In freez- Ing climates an antifreeze mixture is required to provide freeze protection. An optional electronic control panel provides continuous. Reservoir-2 gallon Probe Assembly monitoring and instant alarm.The liquid sensing probe Model R2 Housing assembly is mounted to the reservoir(contractor provides Atmospheric Vent the wiring from the probe assembly to the control panel). Refill Port Using an intrinsically safe circuit,the electronic control ' Plastic Hallow panel senses the presence of liquid in the reservoir by Spheres measuring the conductance between the two stainless steel probes on the probe assembly.The control panel is Wall Mount Bracket complete with warning bell,panel lights,and transmission contacts for other optional warning devices(contractor pro- vided)such as a telephone dialer, a light beacon,etc. This simple device,which has no moving parts or com- plicated control package, provides maximum protection to the tank owner by continuously monitoring both the outer and inner tank walls.The reservoir will drain if either wall is breached. ntrol panel Optional Leak Electronic i4E7 Simulator" Sensing Probe Reservoir^ Mounted msidea Reservoir SANFORD"ALESSI AS IATES, I�1 Manway Riser Mechan'call Engineer�i re ondui I a e ey/1 Gam. ,QQ No Exceptions Taken O Amend d Resubri ❑ Make Corrections Noted ❑ Rejected This review is only for general conformancE wth the contract documents and does no'. relieve the contractor pf his responsibility to*C(&"gor%Wided iul2ments of the contract documents, applicable codes and regulations.