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TRUCHEK GS)- State-of-the-art continuous monitoring How does TRUCHEK work? Primary-Tank Leak in Wet Hole or Dry Hole Reservoir Level Down w v 4 v v� TRUCHEK® hydrostatic tank monitoring for double-wall tanks is an �^ easy, precise and reliable method for continuous leak detection and for Secondary-Tank Leak in Dry Hole tank-tightness testing. For two decades,TRUCHEK has been successfully Reservoir monitoring thousands of tanks in many different types of installations. /Level Down Continuous Monitoring _ -- When you order a Xerxes double-wall tank with the TRUCHEK option, the interstice between the two tank walls is filled at the factory with a calcium-chloride fluid that also partially fills a reservoir, creating hydrostatic pressure throughout the interstice. An electronic probe placed in the tank's reservoir alarms when the fluid level either falls below or rises above the acceptable level. This increasingly popular 6 method of leak monitoring gives tank owners greater peace of mind than the alternative method of using a simple liquid sensor, which often never detects an outer-wall breach. TRUCHEK has become the industry standard as a state-of-the-art technique for continuous monitoring. Secondary-Tank Leak in Wet Hole Reservoir Changing regulations in some markets now require that new double-wall ^� Level Up tanks have continuous leak detection using a constant vacuum,air pressure — � —. ^Leak in or hydrostatic pressure in the interstice.TRUCHEK is the ideal solution to this Outer Wall growing regulatory requirement. Tank Tightness TRUCHEK also provides a simple, precise and reliable method to perform a tank-tightness test. The 10-hour tightness-test procedure meets the strict NFPA329 criteria. A shorter 4-hour test(while product is dispensing) exceeds EPA's criteria for a tank-tightness test. ZCL Composites Inc. Xerxes Corporation 5