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TROCNEK Many tank owners and fuel-system designers choose Xerxes for double-wall tanks.TRUCHEK is an easy,precise and reliable double-wall fiberglass underground storage tanks because of method for providing continuous leak detection and also for Xerxes' long history as a leader in underground storage tech- performing a tank-tightness test. nology.The unique integral-rib design and construction of all Xerxes tanks make them strong and robust.The fiberglass con- TRUCHEK meets EPA criteria for tank-tightness testing and struction of these tanks makes them resistant to both internal has received third-party verification from Underwriters and external rust. Further,more and more customers choose a Laboratories (UL). Like the tanks that Xerxes manufactures, Xerxes double-wall tank because the two walls of protection TRUCHEK provides a long,successful record of performance. provide extra security in the unlikely event of a leak. TRUCHEK's performance is based on use in thousands of tanks in many different types of installations.This proven per- To enhance that double-wall protection, Xerxes offers the formance is increasingly important as regulations are becoming option of TRUCHEK,a hydrostatic,tank-monitoring system more strict for the continuous monitoring of double-wall Tank-Tightness Testing The TRUCHEK system provides a simple,precise and reliable method to perform a tank-tightness test. It takes into account Typical Tank-Tightness Test the impacts of thermal expansion or contraction of the prod- Using TRUCHEK uct,vapor pockets,tank deflection,evaporation,condensation and the location of the water table. Using a simple 10-hour tightness-test procedure while the tank is not in use,TRUCHEK is capable of detecting a loss of liquid Calibrated Dipstick in the tank at a rate of 0.05 gallons per hour with a 99%prob- Or Ruler ability of detection (PD) and a 1% probability of false alarm (PFA).This meets the strict NFPA 329 criteria. ---Vent in Standpipe 4-inch Standpipe A shorter 4-hour test, which allows product dispensing, is (not provided by Xerxes) capable of detecting a loss of liquid in the tank at a rate of 0.05 gallons per hour with a 95%probability of detection(PD)and a 5% probability of false alarm (PFA). This shorter test exceeds EPA's criteria for a tank-tightness test stating that a test must Monitoring Fluid be able to detect a leak rate of 0.1 gallon per hour with a 95% in Standpipe Reservoir, (during test only) Features and Benefits ■ Has third-party verification from Underwriters Laboratories (UL) ■ Meets or exceeds EPA and NFPA testing criteria ■ Can be tested at the time of installation as well as PD and a 5%PFA. during the lifetime of a tank To conduct a TRUCHEK test, follow the TRUCHEK Tank- ■ Allows product dispensing during the 4-hour test Tightness Testing Procedure outlined in this brochure and fill ■ Can be performed on a variety of tank sizes,as in the attached TRUCHEK Data Log form as appropriate for large as the Xerxes double-wall,30,000-gallon tank the diameter size of the tank to be tested.Keep the completed form as part of the tank records that may be required by federal, ■ May provide a less expensive option to periodic tank state and/or local regulations or codes. tests as a way to meet regulations