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Containment Sumps and Collars — Sumps and collars are common accessories found on virtually all double-wall tanks <br />installed today. Xerxes supplies optional, factory -installed containment collars that provide secondary containment around <br />tank fittings and manways. Designed to be a custom match to the collar, the Xerxes containment sump comes in a variety <br />of models and sizes, all engineered to accommodate different customer preferences and needs. Xerxes sumps and collars <br />are also available in double-wall models that can be monitored with the reliable TRUCHEK hydrostatic monitoring system. <br />Anchoring System — Site-specific installation conditions generally dictate whether a tank -anchoring system is necessary. <br />Sore customers choose to anchor all their tanks. Xerxes offers a complete tank -anchoring system, including reinforced <br />precast concrete deadman (designed to American Concrete Institute standards), fiberglass anchoring straps and <br />galvanized turnbuckles. Each component is engineered to specific tank sizes and for ease of installation. In most cases <br />concrete deadmen can be delivered on the same trailer as the tank. This both minimizes the shipping cost and assures <br />that deadmen are ready for use when the tank is set. <br />Hydrostatic Monitoring —The image on page 8 illustrates the functional design of the highly effective TRUC HEK hydrostatic <br />monitoring system. A "jacket" of calcium -chloride solution is factory -installed in the tank interstice and connected to <br />a tank -top reservoir where the fluid level is monitored with a simple level sensor. The unique Parabeam construction <br />of a Xerxes double-wall tank eliminates false leak alarms that can occur with other tank desigrs. In addition to its <br />simple, yet highly effective, monitoring capabilities, TRUCHEK provides true continuous monitoring of both tank walls <br />regardless of site conditions. This continuous -monitoring feature is increasingly attractive to state and federal regulators, <br />and may become a requ:rement for all new double-wall tanks in the future. <br />9 <br />