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TRUCHEK® — state-of-the-art continuous monitoring To enhance the double-wall protection of a Xerxes°tank,Xerxes offers the option of TRUCHEK,its state-of-the-art system of hydrostatic, tank monitoring for double-wall tanks.TRUCHEK is an easy, precise and reliable method for both continuous leak detection and tank- tightness testing. Like the tanks that Xerxes manufactures,TRUCHEK provides a long,successful record of performance. Continuous leak detection How does TRUCHEK' work? For nearly two decades, the - Primary-Tank Leak in Wet Hole or Dry Hole Xerxes°TRUCHEK •�''-' �- system has suc- vent cessfully moni- Reserm, Level Down tored thousands of tanks in many different types of installations. In fact, it has be- d come an industry d standard as a state-of-the-art technique for continuous monitoring. Changing _ regulations in some markets,such as California, require that new double-wall tanks have continuous leak detection using a constant vacuum,air pressure or hydrostatic pressure in the interstice of a Secondary-Tank Leak in Dry Hole — double-wall tank.A Xerxes tank with TRUCHEK's continuous leak detection is the ideal solution for complying with these strict new vent Re ervoir requirements. Level Down _ While being highly effective,TRUCHEK is also simple and trou- ble-free in both design and operation. With TRUCHEK, simple _ monitoring of the fluid level inside the reservoir of a Xerxes dou- ble-wall tank is all that is necessary. When you order a Xerxes double-wall tank with the TRUCHEK option, the interstice be- _ tween the two tank walls is filled at the factory with a monitor- ing fluid. This water/calcium-chloride fluid also partially fills a reservoir on the top of the tank.This creates a hydrostatic pres- sure throughout the interstice,enabling the operator to monitor the walls of both the primary tank and the secondary tank.An Secondary-Tank Leak in Wet Hole electronic probe placed in the tank's reservoir alarms when the _ fluid level either falls below or rises above the acceptable level. ,—vent Resenroir (See the Xerxes TRUCHEK brochure for more information.) ^ Level Up Tank-tightness testing Leak in- Dute,Wall TRUCHEK also provides a simple,precise and reliable method to perform a tank-tightness test. It takes into account the impacts of thermal expansion or contraction of the product,vapor pock- ets,tank deflection,evaporation,condensation and the location of the water table.The 10-hour tightness-test procedure meets — the strict NFPA 329 criteria.A shorter 4-hour test(while product ^ is dispensing)exceeds EPA's criteria for a tank-tightness test. 6