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-Nov 30 00 10: 52a Mj a Brown 201V6 1 -6342 p. 4 <br /> Bladders Bladders Continued <br /> • A bladder is a fuel cell,approved by an The interstitial space between the tank and the <br /> independent testing organization,installed bladder must have a continuous monitoring system <br /> within a tank • Bladders can only be used in MVF tanks. <br /> • The bladder provides primary containment and . noes not require the 10 year and subsequent 5 year <br /> must be compatible with the substance stored tank liner inspections <br /> • The original tank provides secondary • No future tank integrity testing required <br /> containment for the bladder <br /> 25 26 <br /> Spill Containers A Typical Spill Box <br /> Simply put,a spill container is a"bucket" _ <br /> that's connected to the fill pipe. It must: -- <br /> • Be protected from corrosion <br /> • Hold at least five gallons <br /> • Have a drain valve,or other means to keep it Drain Pipe <br /> empty such as a hand pump <br /> • Be approv y an independent testing Catchment <br /> organization Basin <br /> 27 28 <br /> Overfill Prevention Devices <br /> FA <br /> Pipe <br /> • Automatic Shutoff Devices or"Fill Pipe Devices" <br /> are mounted in the drop tube. They slow and then Automatic —Shutoff <br /> stop the flow of fuel into the tank before it <br /> becomes full(preferred method) Shutoff <br /> • Overfill Alarms provide an audible and visual <br /> alarm when the tank reaches 900/4 capacity Device <br /> • Flow Restrictors or"Ball Float Valves"restrict <br /> flow before the tank is 90%full (least preferred) <br /> P <br /> 29 30 <br />